Dual-Band Microstrip Balun With Flexible Frequency Ratio and High Selectivity

Feng Huang; Jianpeng Wang; Lei Zhu; Quangang Chen; Wen Wu

doi:10.1109/LMWC.2017.2750021

Dual-Band Microstrip Balun With Flexible Frequency Ratio and High Selectivity

Feng Huang, Jianpeng Wang^*, Lei Zhu, Quangang Chen, Wen Wu

^*Corresponding author for this work

Not published at Aalto University

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

16 Citations (Scopus)

Abstract

A new planar microstrip balun with two operation bands is presented and investigated in this letter. Originated from the traditional Marchand balun, the proposed dual-band balun is designed on a symmetrical four-port network with one short-circuited port. Derived equations and design charts show that the frequency ratio (m = f₂/f₁) of these two bands could be flexibly controlled in a wide range of 2.0-4.6. Moreover, inherent transmission zeros nearby each band have been introduced into this dual-band balun, aiming to improve the frequency selectivity. For verification, a prototype dual-band balun operating at 2.4 and 5.2 GHz (m = 2.17) is implemented and measured. Both simulation and measured results are recorded with good agreement.

Original language	English
Article number	8051075
Pages (from-to)	962-964
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	27
Issue number	11
DOIs	https://doi.org/10.1109/LMWC.2017.2750021
Publication status	Published - 1 Nov 2017
MoE publication type	A1 Journal article-refereed

Keywords

Dual-band response
flexible frequency ratio
high selectivity
Marchand balun

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10.1109/LMWC.2017.2750021

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abstract = "A new planar microstrip balun with two operation bands is presented and investigated in this letter. Originated from the traditional Marchand balun, the proposed dual-band balun is designed on a symmetrical four-port network with one short-circuited port. Derived equations and design charts show that the frequency ratio (m = f2/f1) of these two bands could be flexibly controlled in a wide range of 2.0-4.6. Moreover, inherent transmission zeros nearby each band have been introduced into this dual-band balun, aiming to improve the frequency selectivity. For verification, a prototype dual-band balun operating at 2.4 and 5.2 GHz (m = 2.17) is implemented and measured. Both simulation and measured results are recorded with good agreement.",

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Dual-Band Microstrip Balun With Flexible Frequency Ratio and High Selectivity

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Keywords

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