NDLI: A Compact 3 dB <formula formulatype=inline><tex Notation=TeX>${rm E}$</tex></formula>-Plane Waveguide Directional Coupler With Full Bandwidth

Content Provider	IEEE Xplore Digital Library
Author	Yunbo Zhang Qingyuan Wang Huan Xin
Copyright Year	2001
Abstract	A compact 3 dB E-Plane waveguide directional coupler (patent pending) with full bandwidth is proposed in this letter. It consists of a pair of rectangular waveguides placed parallel to each other along their broad side. The tight coupling and wide bandwidth are achieved by using reduced height waveguide and large aperture in the common broad wall of the two parallel waveguides. For verification purpose, a prototype has been manufactured and measured. The measured results show that return loss and isolation of the coupler better than 25 and 26 dB, respectively, and the power-split unbalance within 0.6 dB are achieved over the full waveguide bandwidth.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	227
Ending Page	229
Page Count	3
File Size	701493
File Format	PDF
ISSN	15311309
Volume Number	24
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Directional couplers Bandwidth Couplings Apertures Rectangular waveguides Prototypes 3 dB Directional coupler ${\rm E}$ -plane waveguide full bandwidth large aperture
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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A Compact 3 dB ${rm E}$-Plane Waveguide Directional Coupler With Full Bandwidth