Microstrip directional coupler with nearly ideal TEM coupler performance
暂无分享,去创建一个
A meandered parallel coupled-line structure is proposed to achieve high directivity within a wide bandwidth. By properly increasing the meandered parallel coupled-line sections, the high-directivity bandwidth becomes much wider. An example coupler is fabricated to verify the theory. More than 50 dB of isolation is achieved over a bandwidth of zero to twice centre frequency.
[1] S. Rehnmark. Meander-Folded Coupled Lines , 1978 .
[2] J. L. Klein,et al. Optimum dielectric overlay thickness for equal even- and odd-mode phase velocities in coupled microstrip circuits , 1990 .
[3] Shih-Ming Wang,et al. A study of meandered microstrip coupler with high directivity , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.
[4] Sener Uysal,et al. Synthesis, design, and construction of ultra-wide-band nonuniform quadrature directional couplers in inhomogeneous media , 1989 .