A compact crossover using NRI-TL metamaterial lines
AuthorAntoniades, Marcos A.
Abbosh, A. M.
SourceIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
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A compact NRI-TL metamaterial branch-line crossover is presented that has an area of λ/36 × λ/12, and is a factor of 81 times smaller than its analogous transmission-line counterpart. Circuit simulations reveal that it exhibits a 34% 10 dB S11 bandwidth, good isolation below 10 dB over a 22% bandwidth, and less than 0.5 dB insertion loss over a 15% bandwidth. Furthermore, the bandwidth of the device can be increased by incorporating additional branch-line sections into the structure. © 2012 IEEE.