Novel 3-dB tandem coupler with wide bandwidth by using 4 short stubs

被引：0
|
作者：
Inaba T. [1 ]
Hayashi H. [1 ]
机构：
[1] Sophia University, Tokyo
来源：
Progress in Electromagnetics Research Letters | 2020年 / 93卷
关键词：
Bandwidth;
D O I：
10.2528/pierl20070801
中图分类号：
学科分类号：
摘要：
A new wideband 3-dB tandem coupler is presented that has wide bandwidth using four 90◦ short stubs. The proposed tandem coupler does not require a higher transmission line impedance or a narrower coupling gap than conventional couplers. Measurements of the fabricated tandem coupler operated at a center frequency of f0 = 1 GHz are presented as verification of the design concept. The fractional bandwidth (FBW) at which the return loss was suppressed to a level better than 15 dB was 71%. Theoretical calculations and measurements of the tandem coupler were in good agreement. © 2020, Electromagnetics Academy. All rights reserved.
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页码：131 / 136
页数：5
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