NDLI: Compact coupled-line balun with complex impedances transformation and high isolation

Content Provider	IET Digital Library
Author	Zhang, Weiwei Wu, Yongle Liu, Yuanan Yu, Cuiping Chen, Wenhua
Abstract	A planar microstrip circuit is proposed to design a kind of coupled-line balun with good ports matching and high output-ports isolation for complex source to complex load impedance transformation. This balun prototype essentially consists of three coupled-line sections, a tapped open transmission-line stub (TOTS) on the left-hand side, and a tapped complex equivalent-impedance part (TCEP) on the right-hand side. The TCEP is the key to realise high output isolation and all ports matching. Based on the traditional even-odd mode technique and the transmission-line theory, closed-form mathematical equations for circuit electrical parameters are obtained. To demonstrate this proposed design theory, a practical microstrip coupled-line balun is designed, simulated and measured to operate at approximately 2 GHz, indicating high isolation and balanced output. Good agreements between the simulated and measured results verify this design.
Starting Page	1587
Ending Page	1594
Page Count	8
ISSN	17518725
Volume Number	9
e-ISSN	17518733
Issue Number	Issue 14, Nov (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/9/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2014.0775
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2015-11-19
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Baluns Circuit Electrical Parameter Compact Coupled Line Balun Prototype Complex Load Impedance Transformation Complex Source Coupled Transmission Line Even-odd Mode Technique Impedance Matching Mathematical Equation Microstrip Circuit Microstrip Coupled Line Balun Microstrip Line Microwave Circuit And Device Planar Microstrip Circuit Port Isolation Ports Matching Tapped Complex Equivalent Impedance Tapped Open Transmission Line Stub TCEP Transmission Line Theory Waveguide And Microwave Transmission Line Waveguide And Microwave Transmission Line Component
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

Miniaturised wideband four-way out-of-phase power divider based on Marchand balun

Compact microstrip balun diplexer using stub-loaded dual-mode resonators

Wideband balun bandpass filter with broadside-coupled microstrip/slotline resonator structure

CPW balun for printed balanced antennas

Compact rat-race ring coupler with meander high-impedance transmission line and port impedance matching

Planar ultra-wideband balun using coupled microstrip lines

Design of microstrip tri-mode balun bandpass filter with high selectivity

Coupled-line trans-directional coupler with arbitrary power divisions for equal complex termination impedances

Compact high-isolation planar eight-way power divider using zero-phase isolation circuit

Compact coupled-line balun with complex impedances transformation and high isolation

Similar Documents

Miniaturised wideband four-way out-of-phase power divider based on Marchand balun

Compact microstrip balun diplexer using stub-loaded dual-mode resonators

Wideband balun bandpass filter with broadside-coupled microstrip/slotline resonator structure

CPW balun for printed balanced antennas

Compact rat-race ring coupler with meander high-impedance transmission line and port impedance matching

Planar ultra-wideband balun using coupled microstrip lines

Design of microstrip tri-mode balun bandpass filter with high selectivity

Coupled-line trans-directional coupler with arbitrary power divisions for equal complex termination impedances

Compact high-isolation planar eight-way power divider using zero-phase isolation circuit

Compact coupled-line balun with complex impedances transformation and high isolation