A Compact Slow-Wave Microstrip Branch-Line Coupler With High Performance

  title={A Compact Slow-Wave Microstrip Branch-Line Coupler With High Performance},
  author={Jianpeng Wang and Bingzhong Wang and Yongxin Guo and Ling Chuen Ong and Shaoqiu Xiao},
  journal={IEEE Microwave and Wireless Components Letters},
One compact slow-wave microstrip branch-line coupler is presented. The new structure not only effectively reduces the occupied area to 28% of the conventional branch-line coupler at 2.0 GHz, but also has high second harmonic suppression performance. The measured results indicate a bandwidth of more than 200 MHz has been achieved while the phase difference between S21 and S31 is within 90deg plusmn 1deg. Furthermore, the measured insertion loss is comparable to that of a conventional branch-line… CONTINUE READING
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