NDLI: Compact single-layer bandwidth-enhanced balanced bandpass filter using half-mode substrate-integrated waveguide

Content Provider	IET Digital Library
Author	Shen, Zhidan Xu, Kai Shi, Jin
Abstract	A compact single-layer balanced bandpass filter using just one half-mode substrate-integrated waveguide (HMSIW) multimode resonator with slots is proposed. The pair of microstrip direct-feed lines with space about 0.5λ g (λ g is the guide wavelength of HMSIW at the centre frequency f 0) makes TEHM 103, TEHM 104 and TEHM 105 modes of the HMSIW multimode resonator operate in differential mode and TEHM 102 and TEHM 106 modes operate in common mode (CM). As a result, the features of wide bandwidth and low insertion loss (IL) can be achieved when compared with the state-of-art substrate-integrated waveguide balanced filters. Furthermore, the etched slots can be slightly tuned to make up for the performance deviations caused by the manufacturing error. A prototype is designed with a total size of 1.2λ 0 × 0.14λ 0 (λ 0 is the wavelength in free space at f 0), the 3 dB fractional bandwidth (FBW) of 28% at the centre frequency of 6 GHz, the minimum IL of 0.86 dB, and the bandwidth of 20 dB CM suppression of 0.25f 0.
Starting Page	697
Ending Page	699
Page Count	3
ISSN	00135194
Volume Number	55
e-ISSN	1350911X
Issue Number	Issue 12, Jun (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/55/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2019.1270
Journal	Electronics Letters
Publisher Date	2019-05-15
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Band-pass Filter Centre Frequency Compact Single-layer Balanced Bandpass Filter Compact Single-layer Bandwidth-enhanced Balanced Bandpass Filter Differential Mode Etched Slot Frequency 6.0 GHz Half-mode Substrate-integrated Waveguide Multimode Resonator HMSIW Multimode Resonator Low Insertion Loss Microstrip Direct-feed Line Microstrip Filter Microstrip Resonator Microwave Filter Microwave Resonator Passive Filter Passive Network Performance Deviations Resonator Filter Substrate Integrated Waveguide Substrate-integrated Waveguide Balanced Filter TEHM 102 Mode TEHM 103 Mode TEHM 104 Mode TEHM 105 Mode TEHM 106 Mode Waveguide And Microwave Transmission Line Component Waveguide Filter
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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