A Miniaturized 3-dB hybrid coupler using the comb line

作者：Pei Guo Hua; Choi Hak Keun^*

来源：Microwave and Optical Technology Letters, 2015, 57(11): 2641-2645.

DOI：10.1002/mop.29410

• hybrid coupler
• comb-line hybrid coupler
• miniaturization
• transmission line

In this article, a comb-line architecture is proposed for miniaturization of a 3-dB hybrid transmission coupler. The comb-line coupler uses a periodic structure of distributed capacitance and inductance, thereby reducing the physical length of the coupler compared with conventional structures. Using the above principle, a miniaturized 3-dB comb-line hybrid coupler (operational range 1.71-2.17 GHz) was designed and manufactured, and its performance was compared with that of a conventional 3-dB hybrid coupler. The size of the 3-dB comb-line hybrid coupler was reduced by 22.6% while maintaining the same performance as a conventional general hybrid coupler.

• 出版日期2015-11