Transdirectional coupled-line couplers implemented by periodical shunt capacitors

Ching Ian Shie; Jui Ching Cheng; Sheng Chun Chou; Yi Chyun Chiang

doi:10.1109/TMTT.2009.2034219

Transdirectional coupled-line couplers implemented by periodical shunt capacitors

Ching Ian Shie^*, Jui Ching Cheng, Sheng Chun Chou, Yi Chyun Chiang

^*Corresponding author for this work

Department of Electronic Engineering

Chang Gung University

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

75 Scopus citations

Abstract

Transdirectional coupled-line couplers have the benefit of perfect input/output isolation. However, for a coupled-line coupler to operate in transdirectional mode, both phase- and impedance-coupling are required, which is difficult to meet by traditional coupled lines. To overcome this problem, this paper presents a novel transdirectional coupled-line coupler implemented by periodically loaded coupled lines. Two 3-dB 90° hybrids are designed and built to verify this concept. The first one was built on FR-4 substrates and operated at 3.6 GHz. The second one was built on Roger RT/Duroid 5870 substrates with length reduced and operated at 3.6 GHz. A good agreement with simulated results is reached.

Original language	English
Article number	5338002
Pages (from-to)	2981-2988
Number of pages	8
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	57
Issue number	12
DOIs	https://doi.org/10.1109/TMTT.2009.2034219
State	Published - 12 2009

Keywords

Hybrid
Periodic structure
Transdirectional coupler

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10.1109/TMTT.2009.2034219

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title = "Transdirectional coupled-line couplers implemented by periodical shunt capacitors",

abstract = "Transdirectional coupled-line couplers have the benefit of perfect input/output isolation. However, for a coupled-line coupler to operate in transdirectional mode, both phase- and impedance-coupling are required, which is difficult to meet by traditional coupled lines. To overcome this problem, this paper presents a novel transdirectional coupled-line coupler implemented by periodically loaded coupled lines. Two 3-dB 90° hybrids are designed and built to verify this concept. The first one was built on FR-4 substrates and operated at 3.6 GHz. The second one was built on Roger RT/Duroid 5870 substrates with length reduced and operated at 3.6 GHz. A good agreement with simulated results is reached.",

keywords = "Hybrid, Periodic structure, Transdirectional coupler",

author = "Shie, {Ching Ian} and Cheng, {Jui Ching} and Chou, {Sheng Chun} and Chiang, {Yi Chyun}",

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doi = "10.1109/TMTT.2009.2034219",

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AU - Shie, Ching Ian

AU - Cheng, Jui Ching

AU - Chou, Sheng Chun

AU - Chiang, Yi Chyun

PY - 2009/12

Y1 - 2009/12

N2 - Transdirectional coupled-line couplers have the benefit of perfect input/output isolation. However, for a coupled-line coupler to operate in transdirectional mode, both phase- and impedance-coupling are required, which is difficult to meet by traditional coupled lines. To overcome this problem, this paper presents a novel transdirectional coupled-line coupler implemented by periodically loaded coupled lines. Two 3-dB 90° hybrids are designed and built to verify this concept. The first one was built on FR-4 substrates and operated at 3.6 GHz. The second one was built on Roger RT/Duroid 5870 substrates with length reduced and operated at 3.6 GHz. A good agreement with simulated results is reached.

AB - Transdirectional coupled-line couplers have the benefit of perfect input/output isolation. However, for a coupled-line coupler to operate in transdirectional mode, both phase- and impedance-coupling are required, which is difficult to meet by traditional coupled lines. To overcome this problem, this paper presents a novel transdirectional coupled-line coupler implemented by periodically loaded coupled lines. Two 3-dB 90° hybrids are designed and built to verify this concept. The first one was built on FR-4 substrates and operated at 3.6 GHz. The second one was built on Roger RT/Duroid 5870 substrates with length reduced and operated at 3.6 GHz. A good agreement with simulated results is reached.

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KW - Transdirectional coupler

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JO - IEEE Transactions on Microwave Theory and Techniques

JF - IEEE Transactions on Microwave Theory and Techniques

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Transdirectional coupled-line couplers implemented by periodical shunt capacitors

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Keywords

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