Dual-Band Unequal-Power Quadrature Branch-Line Coupler With Coupled Lines

@article{Yu2013DualBandUQ,
  title={Dual-Band Unequal-Power Quadrature Branch-Line Coupler With Coupled Lines},
  author={Chun-Han Yu and Yi-Hsin Pang},
  journal={IEEE Microwave and Wireless Components Letters},
  year={2013},
  volume={23},
  pages={10-12}
}
A planar dual-band quadrature branch-line coupler with coupled lines is presented in this letter. The quarter-wavelength transformers in a conventional branch-line coupler are replaced by coupled lines. With derived explicit design formula, the proposed branch-line coupler can not only be operated at two arbitrary frequencies, but it can also exhibit the… CONTINUE READING