A harmonic and size reduced ring hybrid using hairpin-type LUCs

초록

New hairpin-type low pass unit cells (LUC) are applied to the design of a microstrip hybrid ring for size reduction and harmonic suppression. This LUC is superior to the previously reported LUC in the simplicity of its structure and its ability to suppress harmonics. By substituting the LUCs for each one of the six 14 portions of the conventional hybrid ring, significant size reduction and excellent harmonic suppression have been achieved without degrading the hybrid characteristics themselves. The area size of the fabricated hybrid ring is reduced to one fourth of the conventional one. The simulated and measured responses show that not only the third but also the fifth harmonics are suppressed by approximately 20 dB.

키워드