A Nonstandard Phase-Difference Ring Coupler for Unequal Power Division

作者：He, Qing; Zhang, Fan; Lou, Xiaoping; Zhu, Lianqing^*

来源：Electromagnetics, 2016, 36(2): 111-122.

DOI：10.1080/02726343.2016.1136047

• nonstandard phase difference
• compact structure
• Arbitrary power division
• ring coupler

A planar ring coupler with nonstandard phase difference and an unequal power division ratio is proposed in this article. The circuit topology of this coupler is similar to the traditional coupler, which consists of four arms in microstrip implementation. The design parameters of this coupler can be determined easily by closed-form equations. Based on standard microstrip technology, the interrelated constraint between phase difference and realizable power division ratio has been investigated. The fractional bandwidth analysis in terms of phase difference and power division is provided. Two prototypes with this proposed structure, operating at 1 GHz, have been designed, simulated, and implemented using microstrip lines. The measurement shows good agreement with the numerical results, which demonstrates the validity of this design.

• 出版日期2016-2-17