Size Reduction and Harmonic Suppression of Rat-Race Hybrid Coupler Using Defected Ground Structure

Y. J. Sung; C. S. Ahn; Y. S. Kim

doi:10.1109/LMWC.2003.821499

Size Reduction and Harmonic Suppression of Rat-Race Hybrid Coupler Using Defected Ground Structure

Y. J. Sung, C. S. Ahn, Y. S. Kim

* Honorary professors

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

173 Citations (Scopus)

Abstract

In this letter, a defected ground structure (DGS) is applied to design a compact microstrip rat-race hybrid coupler. The proposed structure can achieve both a significant reduction of size and harmonic signal. By embedding the DGS section, it is observed that the resonant frequency of the hybrid coupler is significantly lowered, which can lead to a large amount of size reduction for a fixed frequency operation. Besides, the third harmonic signal is suppressed to -30 dB with respect to a conventional rat-race hybrid coupler. In this case, the measured insertion loss is comparable to that of a conventional hybrid coupler.

Original language	English
Pages (from-to)	7-9
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	14
Issue number	1
DOIs	https://doi.org/10.1109/LMWC.2003.821499
Publication status	Published - 2004 Jan

Keywords

Defected ground structure
Rat-race coupler

ASJC Scopus subject areas

Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/LMWC.2003.821499

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abstract = "In this letter, a defected ground structure (DGS) is applied to design a compact microstrip rat-race hybrid coupler. The proposed structure can achieve both a significant reduction of size and harmonic signal. By embedding the DGS section, it is observed that the resonant frequency of the hybrid coupler is significantly lowered, which can lead to a large amount of size reduction for a fixed frequency operation. Besides, the third harmonic signal is suppressed to -30 dB with respect to a conventional rat-race hybrid coupler. In this case, the measured insertion loss is comparable to that of a conventional hybrid coupler.",

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N2 - In this letter, a defected ground structure (DGS) is applied to design a compact microstrip rat-race hybrid coupler. The proposed structure can achieve both a significant reduction of size and harmonic signal. By embedding the DGS section, it is observed that the resonant frequency of the hybrid coupler is significantly lowered, which can lead to a large amount of size reduction for a fixed frequency operation. Besides, the third harmonic signal is suppressed to -30 dB with respect to a conventional rat-race hybrid coupler. In this case, the measured insertion loss is comparable to that of a conventional hybrid coupler.

AB - In this letter, a defected ground structure (DGS) is applied to design a compact microstrip rat-race hybrid coupler. The proposed structure can achieve both a significant reduction of size and harmonic signal. By embedding the DGS section, it is observed that the resonant frequency of the hybrid coupler is significantly lowered, which can lead to a large amount of size reduction for a fixed frequency operation. Besides, the third harmonic signal is suppressed to -30 dB with respect to a conventional rat-race hybrid coupler. In this case, the measured insertion loss is comparable to that of a conventional hybrid coupler.

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KW - Rat-race coupler

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Size Reduction and Harmonic Suppression of Rat-Race Hybrid Coupler Using Defected Ground Structure

Abstract

Keywords

ASJC Scopus subject areas

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