NDLI: Millimetre wave SIW diplexer circuits with relaxed fabrication tolerances

Content Provider	IET Digital Library
Author	Aitken, John Ross Hong, Jiasheng Hao, Zhang Cheng
Abstract	This study is concerned with the development of millimetre wave substrate integrated waveguide (SIW) diplexers, with an aim of relaxing fabrication tolerances. A method of designing SIW components initially in a dielectric filled waveguide (DWG) medium, and then translating a final optimised design to SIW is presented. Owing to the equivalence between SIW and DWG, the translated SIW components do not require a further optimisation which is a significant advantage as it speeds up the design process. The authors demonstrate this process by presenting the design of a Ka-band diplexer that consists of a highpass filter, hybrid coupler and low-order bandpass filter, where good agreement between the DWG and translated SIW cases can be observed. To investigate how the diplexer handles fabrication errors, the authors subjected the circuit to a tolerance analysis where simulated results suggest that the highpass filter in the diplexer is less sensitive to fabrication errors than the bandpass filter and its use in millimetre wave SIW diplexer circuits can help to relax sensitivity to fabrication errors. These observations are verified with the measurement of a fabricated Ka-band SIW diplexer, where the measured and simulated S-parameters are in very good agreement.
Starting Page	1133
Ending Page	1138
Page Count	6
ISSN	17518725
Volume Number	11
e-ISSN	17518733
Issue Number	Issue 8, Jun (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/11/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2016.0594
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2017-03-16
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Band-pass Filter Design Process Dielectric Filled Waveguide Medium Dielectric-loaded Waveguide DWG Medium Fabrication Error High Pass Filter High-pass Filter Hybrid Coupler Ka-band Diplexer Design Low-order Band-pass Filter Microwave Circuit And Device Millimetre Wave Circuit Millimetre Wave Filter Millimetre Wave Resonator Millimetre Wave SIW Diplexer Circuit Multiplexing Equipment Passive Filter Passive Network Relaxed Fabrication Tolerance Analysis Resonator Filter S Parameter Substrate Integrated Waveguide Waveguide And Microwave Transmission Line Component
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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