An inductor-loaded microstrip directional coupler for directivity enhancement

Seungku Lee; Yongshik Lee

doi:10.1109/LMWC.2009.2020014

An inductor-loaded microstrip directional coupler for directivity enhancement

Seungku Lee, Yongshik Lee

Department of Electrical and Electronic Engineering

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

32 Citations (Scopus)

Abstract

A directivity-enhancement technique is demonstrated for a microstrip directional coupler. By loading the coupler with shunt inductors, the phase velocities of the even and odd modes are altered in such a way that an isolation null is achieved. Compared with other compensation techniques for directivity enhancements, the proposed method provides the advantages of being simple yet easily application to high frequencies. For a 10 dB directional coupler at 0.9 GHz, a maximum directivity improvement of nearly 38 dB is measured over the conventional counterpart.

Original language	English
Article number	4967855
Pages (from-to)	362-364
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	19
Issue number	6
DOIs	https://doi.org/10.1109/LMWC.2009.2020014
Publication status	Published - 2009 Jun

Bibliographical note

Funding Information:
Manuscript received January 06, 2009; revised March 04, 2009. First published May 26, 2009; current version published June 05, 2009. This work was supported by the Defense Acquisition Program Administration and by the Agency for Defense Development of Korea, under Contracts 5ND0600407, UD-070054–AD, and UD-080040–GD.

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/LMWC.2009.2020014

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abstract = "A directivity-enhancement technique is demonstrated for a microstrip directional coupler. By loading the coupler with shunt inductors, the phase velocities of the even and odd modes are altered in such a way that an isolation null is achieved. Compared with other compensation techniques for directivity enhancements, the proposed method provides the advantages of being simple yet easily application to high frequencies. For a 10 dB directional coupler at 0.9 GHz, a maximum directivity improvement of nearly 38 dB is measured over the conventional counterpart.",

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AB - A directivity-enhancement technique is demonstrated for a microstrip directional coupler. By loading the coupler with shunt inductors, the phase velocities of the even and odd modes are altered in such a way that an isolation null is achieved. Compared with other compensation techniques for directivity enhancements, the proposed method provides the advantages of being simple yet easily application to high frequencies. For a 10 dB directional coupler at 0.9 GHz, a maximum directivity improvement of nearly 38 dB is measured over the conventional counterpart.

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An inductor-loaded microstrip directional coupler for directivity enhancement

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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