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          Number of items: 23.
          
            
              
                
    
      
        
          
        
      
    
  
              
                
    
      
        
          
        
      
    
  
              
                
    
      
        
          
        
      
    
  
              
            
          
          
            
    
    
      
        2025
      
      
        
          
          
  
    
      
      
        Phase-Only Pattern Synthesis of Domino Tiling Irregular Arrays Based on Deep Reinforcement Learning and Gradient-descent Optimization. (2025)
        
          
            
               Yihan Ma, 
            
               Yibing Guo, 
            
               Qi Luo, 
            
               Yonggang Zhou, 
            
               Guangwei Yang
                and
                
            
               Steven Gao
            
          
        
        
      
      
        
          
            
              
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        Dual-Band Dual-Polarized Array Based on Electromagnetic Transparent Antenna for Vehicle-Mounted Base Station Systems. (2025)
        
          
            
               Xuekang Liu, 
            
               Benito Sanz-Izquierdo, 
            
               Steven Gao, 
            
               Qi Luo, 
            
               Lu Zhang, 
            
               Lehu Wen, 
            
               Xue-Xia Yang
                and
                
            
               Lei Wang
            
          
        
        
      
      
        
          
            
              
     Conformal reconfigurable holographic metasurface for multifunctional radiation and scattering modulation. (2025)
        
          
            
               Xinyu Zhang, 
            
               Yuchen Gao, 
            
               Wei Hu, 
            
               Qi Luo, 
            
               Tao Hong, 
            
               Kai-Da Xu
                and
                
            
               Wen Jiang
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Conformal reconfigurable holographic metasurface for multifunctional radiation and scattering modulation. (2025)
        
          
            
               Xinyu Zhang, 
            
               Yuchen Gao, 
            
               Wei Hu, 
            
               Qi Luo, 
            
               Tao Hong, 
            
               Kai-Da Xu
                and
                
            
               Wen Jiang
            
          
        
        
      
      
        
          
            
              
     
                          
            
          
        
        
      
    
  
  
        
      
    
  
          
            
    
    
  
          
            
    
    
      
        2023
      
      
        
          
          
  
    
      
      
        Spoof Surface Plasmon Polaritons Based Antenna and Array by Exciting both Even and Odd Mode Resonances. (2023)
        
          
            
               Lehu Wen, 
            
               Wei Hu, 
            
               Bo Pang, 
            
               Qi Luo
                and
                
            
               Steven Gao
            
          
        
        
      
      
        
          
            
              
     Low-Cost Wide-Angle Beam-Scanning Transmitarray Antennas Using Lens-Loaded Patch Elements: A Proof-of-Concept Study. (2023)
        
          
            
               Wei Hu, 
            
               Mingyang Dong, 
            
               Qi Luo, 
            
               Yuanming Cai, 
            
               Lehu Wen, 
            
               Tian-Xi Feng, 
            
               Wen Jiang
                and
                
            
               Steven Gao
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Low-Cost Wide-Angle Beam-Scanning Transmitarray Antennas Using Lens-Loaded Patch Elements: A Proof-of-Concept Study. (2023)
        
          
            
               Wei Hu, 
            
               Mingyang Dong, 
            
               Qi Luo, 
            
               Yuanming Cai, 
            
               Lehu Wen, 
            
               Tian-Xi Feng, 
            
               Wen Jiang
                and
                
            
               Steven Gao
            
          
        
        
      
      
        
          
            
              
     Wideband Circularly Polarized Reflectarray Antenna Using Rotational Symmetrical Crossed Dipoles. (2023)
        
          
            
               Lehu Wen, 
            
               Steven Gao, 
            
               Qi Luo, 
            
               Wei Hu, 
            
               Benito Sanz-Izquierdo
                and
                
            
               Xue-xia Yang
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Wideband Circularly Polarized Reflectarray Antenna Using Rotational Symmetrical Crossed Dipoles. (2023)
        
          
            
               Lehu Wen, 
            
               Steven Gao, 
            
               Qi Luo, 
            
               Wei Hu, 
            
               Benito Sanz-Izquierdo
                and
                
            
               Xue-xia Yang
            
          
        
        
      
      
        
          
            
              
     
                          
            
          
        
        
      
    
  
  
        
      
    
  
          
            
    
    
      
        2022
      
      
        
          
          
  
    
      
      
        A Mutual-Coupling-Suppressed Dual-Band Dual-Polarized Base Station Antenna Using Multiple Folded-Dipole Antenna. (2022)
        
          
            
               Xuekang Liu, 
            
               Steven Gao, 
            
               Benito Sanz-Izquierdo, 
            
               Haiwei Zhang, 
            
               Lehu Wen, 
            
               Wei Hu, 
            
               Qi Luo, 
            
               Josaphat Tetuko Sri Sumantyo
                and
                
            
               Xue-Xia Yang
            
          
        
        
      
      
        
          
            
              
     Proceedings of Abstracts, School of Physics, Engineering and Computer Science Research Conference 2022. (2022)
        
          
            
               Daerefa-a Amafabia, 
            
               Laurel Asimea, 
            
               John Bally, 
            
               Anthony Baran, 
            
               Adam Boies, 
            
               Amirhossein Borjali, 
            
               Chloe Bosomworth, 
            
               Ben Burningham, 
            
               Napoleana-Anna Chaliasou, 
            
               Yong Kang CHEN, 
            
               Yuen Ki Cheong, 
            
               Mahmoud Chizari, 
            
               Etelka Chung, 
            
               Kristen Coppin, 
            
               Opukuro David-West, 
            
               Nik Dennler, 
            
               Hom Dhakal, 
            
               Nikolay Dimov, 
            
               Emil Dmitruk, 
            
               Allen Donald, 
            
               Damien Drix, 
            
               Sergio A. Dzib, 
            
               Mahmoud Eltaweel, 
            
               Sajid Fadlelseed, 
            
               Atena Farahani, 
            
               Adrian Felix, 
            
               Tim Foat, 
            
               Jan Forbrich, 
            
               Maximilien Franco, 
            
               Joesphine Gaarn, 
            
               Tracy Garratt, 
            
               Jim Geach, 
            
               Narges Ghias, 
            
               Adrian Ghita, 
            
               Niccolo Giannetti, 
            
               Jaime Vargas-Gonzalez, 
            
               Richard Greenaway, 
            
               George Haritos, 
            
               Sara Hatami, 
            
               David Haydock, 
            
               Na Helian, 
            
               Mohammad Reza Herfatmanesh, 
            
               Jean-Baptiste Herve, 
            
               Evelyn Hesse, 
            
               Hossein Korani, 
            
               Vahid Hosseini, 
            
               Wei Hu, 
            
               Thomas Hubbard, 
            
               Jameel Inal, 
            
               Patrick Irigo, 
            
               Sikiru O. Ismail, 
            
               Fiona Jepleting, 
            
               Wei Ji, 
            
               Ian Johnston, 
            
               Gbanaibolou Jombo, 
            
               Shabnam Kadir, 
            
               Christos Kalyvas, 
            
               Syed Muhammad Kamran, 
            
               Antonios Kanellopoulos, 
            
               Aklil Zenebe Kiflay, 
            
               Raimund Kirner, 
            
               Kerry Knox, 
            
               Chiaki Kobayashi, 
            
               Dhirendra Kumar, 
            
               Ritesh Kumar, 
            
               Peter Lane, 
            
               Himayasri Lekkala, 
            
               Andrew Lewis, 
            
               Liang Li, 
            
               Qi Luo, 
            
               Hossein Madani, 
            
               Colin Mallet, 
            
               Surya Maruthupandian, 
            
               Elizabeth Reeja Mathen, 
            
               Pavel Matousek, 
            
               Simon McCool, 
            
               James C. McGarry, 
            
               Catherine Menon, 
            
               Christoph Metzner, 
            
               Rachael E. H. Miles, 
            
               Hadi Moeinnia, 
            
               Paul Moggridge, 
            
               Mahdi Mohseni, 
            
               Diogo Montalvão, 
            
               Mohammad Najeeb Moraby, 
            
               Darragh Murnane, 
            
               Marc Norgate, 
            
               Amir Nourani, 
            
               Kumar Shantanu Prasad, 
            
               Soodamani Ramalingam, 
            
               Shavika Rastogi, 
            
               Jonathan P. Reid, 
            
               Guogang Ren, 
            
               Victor M. Rivilla, 
            
               Hossein Saidpour, 
            
               Kiyoshi Saito, 
            
               Seyed Amir Hossein Sajedi, 
            
               Christoph Salge, 
            
               Samadhi Samararatne, 
            
               Michael Schmuker, 
            
               Elif Sensoy, 
            
               Ajay Shriram, 
            
               Harpreet Singh, 
            
               Yasser Sorouraddin, 
            
               Volker Steuber, 
            
               Nicholas Stone, 
            
               Yi Sun, 
            
               Roopesh Sureddi, 
            
               Samuel Sutton, 
            
               Peter Thomas, 
            
               Andrew R Timms, 
            
               P. R. Tiwari, 
            
               Athanasios Tsokanos, 
            
               Mansukhlal Vadalia, 
            
               Muhammad Yaqoob, 
            
               Muhamad Yulianto
                and
                
            
               Minghua Zheng
            
          
        
        
      
      
        
          
            
              
    picture_as_pdf
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Low-Profile Wideband Circularly Polarized Array Antennas Using Integrated Half-Power Quadrature Power Divider. (2022)
        
          
            
               Lehu Wen, 
            
               Steven Gao, 
            
               Qi Luo, 
            
               Wei Hu, 
            
               Benito Sanz-Izquierdo
                and
                
            
               Xue-Xia Yang
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Proceedings of Abstracts, School of Physics, Engineering and Computer Science Research Conference 2022. (2022)
        
          
            
               Daerefa-a Amafabia, 
            
               Laurel Asimea, 
            
               John Bally, 
            
               Anthony Baran, 
            
               Adam Boies, 
            
               Amirhossein Borjali, 
            
               Chloe Bosomworth, 
            
               Ben Burningham, 
            
               Napoleana-Anna Chaliasou, 
            
               Yong Kang CHEN, 
            
               Yuen Ki Cheong, 
            
               Mahmoud Chizari, 
            
               Etelka Chung, 
            
               Kristen Coppin, 
            
               Opukuro David-West, 
            
               Nik Dennler, 
            
               Hom Dhakal, 
            
               Nikolay Dimov, 
            
               Emil Dmitruk, 
            
               Allen Donald, 
            
               Damien Drix, 
            
               Sergio A. Dzib, 
            
               Mahmoud Eltaweel, 
            
               Sajid Fadlelseed, 
            
               Atena Farahani, 
            
               Adrian Felix, 
            
               Tim Foat, 
            
               Jan Forbrich, 
            
               Maximilien Franco, 
            
               Joesphine Gaarn, 
            
               Tracy Garratt, 
            
               Jim Geach, 
            
               Narges Ghias, 
            
               Adrian Ghita, 
            
               Niccolo Giannetti, 
            
               Jaime Vargas-Gonzalez, 
            
               Richard Greenaway, 
            
               George Haritos, 
            
               Sara Hatami, 
            
               David Haydock, 
            
               Na Helian, 
            
               Mohammad Reza Herfatmanesh, 
            
               Jean-Baptiste Herve, 
            
               Evelyn Hesse, 
            
               Hossein Korani, 
            
               Vahid Hosseini, 
            
               Wei Hu, 
            
               Thomas Hubbard, 
            
               Jameel Inal, 
            
               Patrick Irigo, 
            
               Sikiru O. Ismail, 
            
               Fiona Jepleting, 
            
               Wei Ji, 
            
               Ian Johnston, 
            
               Gbanaibolou Jombo, 
            
               Shabnam Kadir, 
            
               Christos Kalyvas, 
            
               Syed Muhammad Kamran, 
            
               Antonios Kanellopoulos, 
            
               Aklil Zenebe Kiflay, 
            
               Raimund Kirner, 
            
               Kerry Knox, 
            
               Chiaki Kobayashi, 
            
               Dhirendra Kumar, 
            
               Ritesh Kumar, 
            
               Peter Lane, 
            
               Himayasri Lekkala, 
            
               Andrew Lewis, 
            
               Liang Li, 
            
               Qi Luo, 
            
               Hossein Madani, 
            
               Colin Mallet, 
            
               Surya Maruthupandian, 
            
               Elizabeth Reeja Mathen, 
            
               Pavel Matousek, 
            
               Simon McCool, 
            
               James C. McGarry, 
            
               Catherine Menon, 
            
               Christoph Metzner, 
            
               Rachael E. H. Miles, 
            
               Hadi Moeinnia, 
            
               Paul Moggridge, 
            
               Mahdi Mohseni, 
            
               Diogo Montalvão, 
            
               Mohammad Najeeb Moraby, 
            
               Darragh Murnane, 
            
               Marc Norgate, 
            
               Amir Nourani, 
            
               Kumar Shantanu Prasad, 
            
               Soodamani Ramalingam, 
            
               Shavika Rastogi, 
            
               Jonathan P. Reid, 
            
               Guogang Ren, 
            
               Victor M. Rivilla, 
            
               Hossein Saidpour, 
            
               Kiyoshi Saito, 
            
               Seyed Amir Hossein Sajedi, 
            
               Christoph Salge, 
            
               Samadhi Samararatne, 
            
               Michael Schmuker, 
            
               Elif Sensoy, 
            
               Ajay Shriram, 
            
               Harpreet Singh, 
            
               Yasser Sorouraddin, 
            
               Volker Steuber, 
            
               Nicholas Stone, 
            
               Yi Sun, 
            
               Roopesh Sureddi, 
            
               Samuel Sutton, 
            
               Peter Thomas, 
            
               Andrew R Timms, 
            
               P. R. Tiwari, 
            
               Athanasios Tsokanos, 
            
               Mansukhlal Vadalia, 
            
               Muhammad Yaqoob, 
            
               Muhamad Yulianto
                and
                
            
               Minghua Zheng
            
          
        
        
      
      
        
          
            
              
    picture_as_pdf
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Low-Profile Wideband Circularly Polarized Array Antennas Using Integrated Half-Power Quadrature Power Divider. (2022)
        
          
            
               Lehu Wen, 
            
               Steven Gao, 
            
               Qi Luo, 
            
               Wei Hu, 
            
               Benito Sanz-Izquierdo
                and
                
            
               Xue-Xia Yang
            
          
        
        
      
      
        
          
            
              
     A Compact Dual-Polarized Filtering Antenna with Steep Cut-Off for Base-Station Applications. (2022)
        
          
            
               Xuekang Liu, 
            
               Steven Gao, 
            
               Wei Hu, 
            
               Lehu Wen, 
            
               Qi Luo, 
            
               Benito Sanz-Izquierdo, 
            
               Xiaodong Chen, 
            
               Long Qian, 
            
               Josaphat Tetuko Sri Sumantyo
                and
                
            
               Xue-Xia Yang
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        A Compact Dual-Polarized Filtering Antenna with Steep Cut-Off for Base-Station Applications. (2022)
        
          
            
               Xuekang Liu, 
            
               Steven Gao, 
            
               Wei Hu, 
            
               Lehu Wen, 
            
               Qi Luo, 
            
               Benito Sanz-Izquierdo, 
            
               Xiaodong Chen, 
            
               Long Qian, 
            
               Josaphat Tetuko Sri Sumantyo
                and
                
            
               Xue-Xia Yang
            
          
        
        
      
      
        
          
            
              
     Proof of Concept of a Low-Cost Beam-Steering Hybrid Reflectarray that Mixes Microstrip and Lens Elements Using Passive Demonstrators. (2022)
        
          
            
               Qi Luo, 
            
               Steven Gao, 
            
               Wei Hu, 
            
               Wei Liu, 
            
               Luis M. Pessoa, 
            
               Mohammed Sobhy
                and
                
            
               Yichuang Sun
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Proof of Concept of a Low-Cost Beam-Steering Hybrid Reflectarray that Mixes Microstrip and Lens Elements Using Passive Demonstrators. (2022)
        
          
            
               Qi Luo, 
            
               Steven Gao, 
            
               Wei Hu, 
            
               Wei Liu, 
            
               Luis M. Pessoa, 
            
               Mohammed Sobhy
                and
                
            
               Yichuang Sun
            
          
        
        
      
      
        
          
            
              
     Robust Multi-Beam Multiplexing Design Based on a Hybrid Beamforming Structure with Nearly Equal Magnitude Analogue Coefficients. (2022)
        
          
            
               Junwei Zhang, 
            
               Wei Liu, 
            
               Chao Gu, 
            
               Steven Gao
                and
                
            
               Qi Luo
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Robust Multi-Beam Multiplexing Design Based on a Hybrid Beamforming Structure with Nearly Equal Magnitude Analogue Coefficients. (2022)
        
          
            
               Junwei Zhang, 
            
               Wei Liu, 
            
               Chao Gu, 
            
               Steven Gao
                and
                
            
               Qi Luo
            
          
        
        
      
      
        
          
            
              
     Wideband Back-Cover Antenna Design Using Dual Characteristic Modes With High Isolation for 5G MIMO Smartphone. (2022)
        
          
            
               Wei Hu, 
            
               Zhan Chen, 
            
               Long Qian, 
            
               Lehu Wen, 
            
               Qi Luo, 
            
               Rui Xu, 
            
               Wen Jiang
                and
                
            
               Steven Gao
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Wideband Back-Cover Antenna Design Using Dual Characteristic Modes With High Isolation for 5G MIMO Smartphone. (2022)
        
          
            
               Wei Hu, 
            
               Zhan Chen, 
            
               Long Qian, 
            
               Lehu Wen, 
            
               Qi Luo, 
            
               Rui Xu, 
            
               Wen Jiang
                and
                
            
               Steven Gao
            
          
        
        
      
      
        
          
            
              
     Wideband Differentially-Fed Slot Antenna and Array With Circularly Polarized Radiation for Millimeter-Wave Applications. (2022)
        
          
            
               Lehu Wen, 
            
               Steven Gao, 
            
               Wei Hu, 
            
               Qi Luo, 
            
               Xue-Xia Yang
                and
                
            
               Benito Sanz-Izquierdo
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Wideband Differentially-Fed Slot Antenna and Array With Circularly Polarized Radiation for Millimeter-Wave Applications. (2022)
        
          
            
               Lehu Wen, 
            
               Steven Gao, 
            
               Wei Hu, 
            
               Qi Luo, 
            
               Xue-Xia Yang
                and
                
            
               Benito Sanz-Izquierdo
            
          
        
        
      
      
        
          
            
              
     
                          
            
          
        
        
      
    
  
  
        
      
    
  
          
            
    
    
      
        2021
      
      
        
          
          
  
    
      
      
        A Low-Profile Beam-Steering Reflectarray with Integrated Leaky-Wave Feed and 2-Bit Phase Resolution for Ka-band SatCom. (2021)
        
          
            
               Qiaoshan Zhang, 
            
               Mingtao Zhang, 
            
               Xiaowei Shi, 
            
               Steven Gao, 
            
               Qi Luo, 
            
               Lei Chen, 
            
               Jixiang Wan
                and
                
            
               Xudong Wang
            
          
        
        
      
      
        
          
            
              
     Highly integrated transmitting and receiving phased array with multi-channels and high efficiency in K/Ka-band SatCom application. (2021)
        
          
            
               Qiaoshan Zhang, 
            
               Xiaowei Shi, 
            
               Steven Gao, 
            
               Yan Li, 
            
               Qi Luo, 
            
               Jixiang Wan, 
            
               Zhaoxuan Xue
                and
                
            
               Lehu Wen
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Highly integrated transmitting and receiving phased array with multi-channels and high efficiency in K/Ka-band SatCom application. (2021)
        
          
            
               Qiaoshan Zhang, 
            
               Xiaowei Shi, 
            
               Steven Gao, 
            
               Yan Li, 
            
               Qi Luo, 
            
               Jixiang Wan, 
            
               Zhaoxuan Xue
                and
                
            
               Lehu Wen
            
          
        
        
      
      
        
          
            
              
     Wideband Differentially Fed Dual-Polarized Antenna by Using Three-Strip Transmission Lines. (2021)
        
          
            
               Le-Hu Wen, 
            
               Steven Gao, 
            
               Q. Luo, 
            
               Benito Sanz-Izquierdo, 
            
               Xiaofei Ren
                and
                
            
               Jian Wu
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Wideband Differentially Fed Dual-Polarized Antenna by Using Three-Strip Transmission Lines. (2021)
        
          
            
               Le-Hu Wen, 
            
               Steven Gao, 
            
               Q. Luo, 
            
               Benito Sanz-Izquierdo, 
            
               Xiaofei Ren
                and
                
            
               Jian Wu
            
          
        
        
      
      
        
          
            
              
     A Wideband Metal-Only Transmitarray With Two-layer Configuration. (2021)
        
          
            
               Wei Hu, 
            
               Jianshen Dong, 
            
               Qi Luo, 
            
               Yuan-Ming Cai, 
            
               Xuekang Liu, 
            
               Lehu Wen, 
            
               Wen Jiang
                and
                
            
               Steven S.C. Gao
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        A Wideband Metal-Only Transmitarray With Two-layer Configuration. (2021)
        
          
            
               Wei Hu, 
            
               Jianshen Dong, 
            
               Qi Luo, 
            
               Yuan-Ming Cai, 
            
               Xuekang Liu, 
            
               Lehu Wen, 
            
               Wen Jiang
                and
                
            
               Steven S.C. Gao
            
          
        
        
      
      
        
          
            
              
     A Dual-Polarized Planar Antenna Array Differentially-Fed by Orthomode Transducer. (2021)
        
          
            
               Q. Yang, 
            
               S. Gao, 
            
               Q. Luo, 
            
               L. Wen, 
            
               X. Ren, 
            
               J. Wu, 
            
               Y. -L. Ban
                and
                
            
               X. Yang
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        A Dual-Polarized Planar Antenna Array Differentially-Fed by Orthomode Transducer. (2021)
        
          
            
               Q. Yang, 
            
               S. Gao, 
            
               Q. Luo, 
            
               L. Wen, 
            
               X. Ren, 
            
               J. Wu, 
            
               Y. -L. Ban
                and
                
            
               X. Yang
            
          
        
        
      
      
        
          
            
              
     A Wideband Triple-Mode Differentially-Fed Microstrip Patch Antenna. (2021)
        
          
            
               Xuekang Liu, 
            
               Wei Hu, 
            
               Steven S.C. Gao, 
            
               Lehu Wen, 
            
               Qi Luo, 
            
               Rui Xu
                and
                
            
               Ying Liu
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        A Wideband Triple-Mode Differentially-Fed Microstrip Patch Antenna. (2021)
        
          
            
               Xuekang Liu, 
            
               Wei Hu, 
            
               Steven S.C. Gao, 
            
               Lehu Wen, 
            
               Qi Luo, 
            
               Rui Xu
                and
                
            
               Ying Liu
            
          
        
        
      
      
        
          
            
              
     Cavity-Backed Slot-Coupled Patch Antenna Array With Dual Slant Polarization for Millimeter-Wave Base Station Applications. (2021)
        
          
            
               Q. Yang, 
            
               S. Gao, 
            
               Q. Luo, 
            
               L. Wen, 
            
               Y. -L. Ban, 
            
               X. -X. Yang, 
            
               X. Ren
                and
                
            
               J. Wu
                          
            
          
        
        
      
    
  
  
        
          
          
  
    
      
      
        Cavity-Backed Slot-Coupled Patch Antenna Array With Dual Slant Polarization for Millimeter-Wave Base Station Applications. (2021)
        
          
            
               Q. Yang, 
            
               S. Gao, 
            
               Q. Luo, 
            
               L. Wen, 
            
               Y. -L. Ban, 
            
               X. -X. Yang, 
            
               X. Ren
                and
                
            
               J. Wu
            
          
        
        
      
      
        
          
            
              
    