NDLI: Compact wide stopband microstrip diplexer with flat channels for WiMAX and wireless applications

Content Provider	IET Digital Library
Author	Yahya, Salah I. Rezaei, Abbas Nouri, Leila
Abstract	This study presents a compact wide stopband microstrip diplexer which is designed based on a novel resonator structure. This novel resonator consists of a main hairpin cell loaded by a smaller hairpin and T-shaped cells. The presented diplexer operates at 3.46 and 4.75 GHz for IEEE 802.16 worldwide interoperability for microwave access (WiMAX) and IEEE802.11a Wireless LAN applications, respectively. The main advantages of the proposed diplexer are its flat channels, two wide bandwidths, attenuated harmonics, low insertion losses better than 0.18 dB, several transmission zeros and sharp frequency response. From first up to fifth harmonics of the proposed diplexer are well attenuated with the maximum harmonic level −20 dB. Meanwhile, the simulation results show that the presented design can suppress harmonics up to 44 GHz. In other words, the harmonics from the 1st up to 12th are suppressed. The group delay at both channels is lower than 1.1 ns, which is good for a microstrip diplexer. This good performance is obtained, while the overall area of the designed diplexer is only 0.037 λ g 2 . Based on the comparison results, the proposed diplexer has a compact size, the minimum group delay and a wide stopband rejection. The proposed diplexer is fabricated and measured. Both simulation and measurement results are in good agreement.
Starting Page	846
Ending Page	852
Page Count	7
ISSN	1751858X
Volume Number	14
e-ISSN	17518598
Issue Number	Issue 6, Sep (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cds/14/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cds.2020.0010
Journal	IET Circuits, Devices & Systems
Publisher Date	2020-05-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Attenuated Harmonics Compact Wide Stopband Microstrip Diplexer Fifth Harmonics Flat Channel Frequency 3.46 GHz Frequency 4.75 GHz Frequency 44.0 GHz Frequency Response Group Delay Harmonics Suppression IEEE 802.16 Worldwide Interoperability For Microwave Access IEEE802.11a Wireless LAN Application Low Insertion Loss Main Hairpin Cell Microstrip Resonator Microwave Resonator Multiplexing Equipment Resonator Structure Sharp Frequency Response Switchgear T-shaped Cell Time 1.1 Ns Transmission Zero Waveguide And Microwave Transmission Line Component Wide Stopband Rejection WiMax Wireless Application Wireless LAN
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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