TW200618385A - Miniaturized multi-layer balun - Google Patents

Miniaturized multi-layer balun

Info

Publication number
TW200618385A
TW200618385A TW093135109A TW93135109A TW200618385A TW 200618385 A TW200618385 A TW 200618385A TW 093135109 A TW093135109 A TW 093135109A TW 93135109 A TW93135109 A TW 93135109A TW 200618385 A TW200618385 A TW 200618385A
Authority
TW
Taiwan
Prior art keywords
balun
coupled lines
layer
pair
section
Prior art date
Application number
TW093135109A
Other languages
Chinese (zh)
Other versions
TWI239675B (en
Inventor
Ching-Liang Weng
Chang-Sheng Chen
Ying-Jiunn Lai
Vei-Ming Jow
Chin-Sun Shyu
Original Assignee
Ind Tech Res Inst
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ind Tech Res Inst filed Critical Ind Tech Res Inst
Priority to TW93135109A priority Critical patent/TWI239675B/en
Application granted granted Critical
Publication of TWI239675B publication Critical patent/TWI239675B/en
Publication of TW200618385A publication Critical patent/TW200618385A/en

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  • Coils Or Transformers For Communication (AREA)

Abstract

A miniaturized multi-layer balun includes a pair of capacitive elements, at least one section of broadside coupled lines connected in series to a unbalanced and two balanced ports through a pair of transmission lines. Each section has first and second coupled lines. A ground connection is located between two central second coupled lines, and connected to a ground. By means of a multi-layer structure and the addition of a ground connection, the balun of the invention can be fabricated with five conductor layers. This not only greatly decreases the size of the balun device, but also enhances the stability of the device. From the measured return loss and differences in magnitude and phase to the frequency, response, it shows that the balun of the invention has good impedance match.
TW93135109A 2004-11-16 2004-11-16 Miniaturized multi-layer balun TWI239675B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW93135109A TWI239675B (en) 2004-11-16 2004-11-16 Miniaturized multi-layer balun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW93135109A TWI239675B (en) 2004-11-16 2004-11-16 Miniaturized multi-layer balun

Publications (2)

Publication Number Publication Date
TWI239675B TWI239675B (en) 2005-09-11
TW200618385A true TW200618385A (en) 2006-06-01

Family

ID=37007512

Family Applications (1)

Application Number Title Priority Date Filing Date
TW93135109A TWI239675B (en) 2004-11-16 2004-11-16 Miniaturized multi-layer balun

Country Status (1)

Country Link
TW (1) TWI239675B (en)

Also Published As

Publication number Publication date
TWI239675B (en) 2005-09-11

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees