一种宽带高方向性微带定向耦合器

doi:10.16180/j.cnki.issn1007-7820.2021.01.001

Abstract

Abstract:

In this paper, a miniaturized directional multisegment microstrip directional coupler with high directivity is designed. By segmenting the coupled microstrip lines, a multisegment coupler composed of a quarter wavelength segment and two 1/8 wavelength segments is obtained. In addition, the difference of odd-even mode speed in the microstrip coupling line of non-uniform medium always leads to poor directivity of the microstrip directional coupler. Aiming at this problem, a quarter arc is adopted at the corner of the feed line of the coupler to improve directivity. A 10 GHz coupler is designed and implemented through optimized simulation. The coupling degree is 25 dB, and the directivity from 6 to 14 GHz is better than 30 dB. Compared with the traditional parallel coupled line coupler, the proposed coupler has smaller size has better directivity, and the measured and simulated results are basically consistent.

Key words: microstrip line, directional coupler, miniaturization, coupler factor, high directional, broadband

CLC Number:

TN61

CHEN Xiaoli,XUE Huanjie,GUAN Boran. A Broadband High Directional Microstrip Directional Coupler[J].Electronic Science and Technology, 2021, 34(1): 1-4.

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References 17

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	节数	波纹系数	耦合度 C₁	耦合度 C₂	耦合度 C₃
等波纹响	n=2	±1.00	-21.77	-30.02	-
应耦合器	n=3	±0.35	-21.40	-27.88	-37.31

	第1节	第2节	第3节
线宽W/mm	0.556	0.394	0.556
线距离S/mm	1.146	0.482	1.146
线长L/mm	1.606	4.182	1.606
板材参数	Rogers5880,E_r=2.2, H=0.254

	L₀	L₁	L₂	L₃	L₄
尺寸	7.30	5.00	1.60	4.18	0.30
	W₀	W₁	W₂	W₃	S
尺寸	0.60	0.40	0.20	0.50	0.93

A Broadband High Directional Microstrip Directional Coupler

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