Exact synthesis of broadband three-line baluns

Hong Ming Lee; Chih Ming Tsai

doi:10.1109/TMTT.2008.2009038

Exact synthesis of broadband three-line baluns

Hong Ming Lee, Chih Ming Tsai

Institute of Computer and Communication Engineering

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

Three types of three-line baluns are studied in this paper. The equivalent circuits of these baluns are derived using the model of coupled transmission lines. The balun designs with Chebyshev response can then be exactly synthesized. A complete design procedure of the baluns with second-, third-, and fourth-order insertion loss functions is presented. Balun designs with wide bandwidths of more than 2 to 1 are achievable by this method. Some guidelines for practical realization are also suggested. A third-order balun design with a fractional bandwidth of 80% is given to demonstrate the proposed procedure.

Original language	English
Article number	4711084
Pages (from-to)	140-148
Number of pages	9
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	57
Issue number	1
DOIs	https://doi.org/10.1109/TMTT.2008.2009038
Publication status	Published - 2009 Jan

All Science Journal Classification (ASJC) codes

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TMTT.2008.2009038

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abstract = "Three types of three-line baluns are studied in this paper. The equivalent circuits of these baluns are derived using the model of coupled transmission lines. The balun designs with Chebyshev response can then be exactly synthesized. A complete design procedure of the baluns with second-, third-, and fourth-order insertion loss functions is presented. Balun designs with wide bandwidths of more than 2 to 1 are achievable by this method. Some guidelines for practical realization are also suggested. A third-order balun design with a fractional bandwidth of 80% is given to demonstrate the proposed procedure.",

author = "Lee, {Hong Ming} and Tsai, {Chih Ming}",

note = "Funding Information: Manuscript received January 06, 2008; revised September 16, 2008. First published December 12, 2008; current version published January 08, 2009. This work was supported in part by the National Science Council, Taiwan, R.O.C., under Grant NSC 96-2221-E-006-005.",

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AB - Three types of three-line baluns are studied in this paper. The equivalent circuits of these baluns are derived using the model of coupled transmission lines. The balun designs with Chebyshev response can then be exactly synthesized. A complete design procedure of the baluns with second-, third-, and fourth-order insertion loss functions is presented. Balun designs with wide bandwidths of more than 2 to 1 are achievable by this method. Some guidelines for practical realization are also suggested. A third-order balun design with a fractional bandwidth of 80% is given to demonstrate the proposed procedure.

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Exact synthesis of broadband three-line baluns

Abstract

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