NDLI: Rectangular waveguide coupler with adjustable coupling coefficient using gap waveguide technology

Content Provider	IET Digital Library
Author	Sun, Dongquan Xu, Jinping
Abstract	Gap waveguide is a promising alternative to traditional waveguide. One of the most important advantages of gap waveguide is that electrical contact between its subcomponents is not necessary. Therefore, it is flexible to adjust its performance by replacing part components of it without the need of reassembling the entire circuit. A slot coupled narrow-wall rectangular waveguide coupler with adjustable coupling coefficient is presented. Coupling slots with different inclined angles are realised in the replaceable narrow-wall coupling plate. By changing the coupling plate, the coupling coefficient can be adjusted flexibly. Corrugated edges are loaded on both sides of the replaceable plate to eliminate resonance maybe excited between the fixed metal plate and replaceable plate. A Ka-band prototype working at the frequency band from 30 to 40 GHz is successfully designed, manufactured and tested. Two replaceable coupling plates with coupling slots inclined of 15° and 45° are manufactured. The measured average coupling coefficient is, respectively, 18.5 and 9 dB. The measured return loss is >17 dB from 30 to 36.5 GHz and >12 dB from 36.5 to 40 GHz. The simulated and measured results agree well.
Starting Page	167
Ending Page	169
Page Count	3
ISSN	00135194
Volume Number	53
e-ISSN	1350911X
Issue Number	Issue 3, Feb (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/53/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2016.4039
Journal	Electronics Letters
Publisher Date	2016-12-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adjustable Coupling Coefficient Frequency 30 GHz to 40 GHz Gap Waveguide Technology Ka-band Waveguide Coupler Narrow Wall Waveguide Coupler Rectangular Waveguide Rectangular Waveguide Coupler Slot Coupled Waveguide Coupler Waveguide And Microwave Transmission Line Component Waveguide Couplers
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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