NDLI: Six-channel diplexer with compact size and high isolation

Content Provider	IET Digital Library
Author	Li, Qun Zhang, Yonghong
Abstract	A six-channel microstrip diplexer with compact size and high isolation is presented. The six-channel diplexer includes two pairs of multimode resonators with a pseudo-interdigital structure and a distributed coupling feeding line. Modal characteristics of the multimode resonator are explained by the even-odd-mode method. The centre frequencies of channel filters can be controlled independently, while bandwidths can be determined by the coupling coefficient and external quality factor. The distributed coupling feeding line has advantages of size reduction and small loading effect. Therefore, each channel filter can be designed independently. Moreover, the distributed coupling feeding line forms the zero degree feeding structure which can bring transmission zeros to realise high isolation. Finally, a six-channel diplexer prototype working at the centre frequencies of 1.8, 2.4, 3.0, 3.8, 4.7 and 5.8 GHz with over 30 dB isolation is fabricated and measured. Simulated and measured results show a good agreement.
Starting Page	1205
Ending Page	1207
Page Count	3
ISSN	00135194
Volume Number	53
e-ISSN	1350911X
Issue Number	Issue 17, Aug (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/53/17
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2017.2182
Journal	Electronics Letters
Publisher Date	2017-07-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Centre Frequencies Channel Filter Compact Size Coupled Transmission Line Coupling Coefficient Distributed Coupling Feeding Line Even-odd-mode Method External Quality Factor Frequency 1.8 GHz to 5.8 GHz High Isolation Microstrip Filter Microwave Filter Microwave Resonator Modal Characteristic Multimode Resonator Multiplexing Equipment Passive Filter Passive Network Pseudointerdigital Structure Q Factor Resonator Filter Six-channel Microstrip Diplexer Size Reduction Small Loading Effect Transmission Zero UHF Filter UHF Resonator Waveguide And Microwave Transmission Line Component Zero Degree Feeding Structure
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
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
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Compact dual-band bandpass filter using single meander multimode DGS resonator

Compact and high isolated triangular split-ring diplexer

Compact diplexer using microstrip half- and quarter-wavelength resonators

Compact microstrip dual-band bandpass filter and quad-channel diplexer based on quint-mode stub-loaded resonators

Compact microstrip triplexer based on twist-modified asymmetric split-ring resonators

Compact ultra-wide stopband low pass filter using multimode resonators

Ultracompact microstrip dual- and triple-band bandpass filters with a common resonator feeding structure

Compact and high selectivity dual-mode microstrip BPF with frequency-dependent source–load coupling

Compact UWB bandpass filter with triple notched bands using parallel U-shaped defected microstrip structure

Six-channel diplexer with compact size and high isolation

Similar Documents

Compact dual-band bandpass filter using single meander multimode DGS resonator

Compact and high isolated triangular split-ring diplexer

Compact diplexer using microstrip half- and quarter-wavelength resonators

Compact microstrip dual-band bandpass filter and quad-channel diplexer based on quint-mode stub-loaded resonators

Compact microstrip triplexer based on twist-modified asymmetric split-ring resonators

Compact ultra-wide stopband low pass filter using multimode resonators

Ultracompact microstrip dual- and triple-band bandpass filters with a common resonator feeding structure

Compact and high selectivity dual-mode microstrip BPF with frequency-dependent source–load coupling

Compact UWB bandpass filter with triple notched bands using parallel U-shaped defected microstrip structure

Six-channel diplexer with compact size and high isolation