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논문 기본 정보

자료유형
학술저널
저자정보
Juneseok Lee (Hanyang University) Jeahoon Cho (Hanyang University) Sang-Gyu Ha (Hanyang University) Hosung Choo (Hongik University) Kyung-Young Jung (Hanyang University)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.13 No.5
발행연도
2018.9
수록면
2,045 - 2,049 (5page)

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초록· 키워드

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An antenna arrays for a satellite navigation systems require more antenna elements to mitigate multiple jamming signals. In order to maintain the small array size while increasing the number of antenna elements, miniaturization technique is essential for antenna design. In this work, an electrically small circular microstrip patch antenna with a 3 ㏈ hybrid coupler is designed as an element antenna, where the 3 ㏈ hybrid coupler can yield the circularly polarized radiation characteristic. The miniaturized element antenna typically has too large capacitance in GPS L1 and GLONASS G1 bands, making it difficult to match with a single stand-alone non-Foster matching circuit (NFMC) in a stable state. Therefore, we propose a new matching technique, referred to as the hybrid matching method, which consists of a NFMC and a passive circuit. This passive tuning circuit manages reactance of antenna elements at an appropriate capacitance without a pole in the operating frequency range. The antenna array is fabricated, and the measured results show a reflection coefficient of less than -10 ㏈ and an isolation of greater than 50 ㏈. In addition, peak gain of the proposed antenna is increased by 22.3 ㏈ compared to the antenna without the hybrid matching network.

목차

Abstract
1. Introduction
2. Antenna array
3. Non-Foster Matching Circuit
4. Results
5. Conclusion
References

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