A Miniaturized 3 dB 90 degrees Hybrid Coupler Using Coupled-Line Section With Spurious Rejection

作者：Kim Jikwon^*; Yook Jong Gwan

来源：IEEE Microwave and Wireless Components Letters, 2014, 24(11): 766-768.

DOI：10.1109/LMWC.2014.2359157

• Branch line coupler
• coupled line section
• microwave component
• miniaturization

In this letter, a novel miniaturization method for 3 dB 90 degrees hybrid coupler is proposed. The proposed structure is composed of a conventional structure with a coupled line section inserted in the low impedance section. The proposed coupler occupies an area of only 9.6% compared to a conventional branch-line coupler, and reveals comparable S-parameter characteristics in the operation band. Furthermore, the proposed structure demonstrates a harmonic suppression property due to the a periodicity at odd order harmonics.

• 出版日期2014-11