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http://dx.doi.org/10.5515/KJKIEES.2016.27.12.1112

Non-Foster Matching Circuit for Wideband Anti-Jamming Small GPS Antennas  

Ha, Sang-Gyu (Department of Electronics Computer Engineering, Hanyang University)
Jung, Kyung-Young (Department of Electronics Computer Engineering, Hanyang University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.27, no.12, 2016 , pp. 1112-1115 More about this Journal
Abstract
Global Positioning System(GPS) is a useful system used in both civilian and military applications. However, the signal of GPS is susceptible to jamming attacks due to low receive sensitivity, since the signals come from the satellite located at over 20,000 km above the earth. In this paper, we have conducted a preceding research on a non-Foster matching circuit that efficiently matches an electrically ultra-small GPS antenna. Electrically Small Antennas(ESAs) are inefficient radiators and are difficult to match in wideband due to extremely high quality factor. In order to match small GPS antenna in wideband, a non-Foster matching circuit for a small GPS antenna was designed. A negative impedance converter circuit consisting of Linvill's cross-coupled pair transistors was fabricated and its stability was verified by the time-domain stability analysis. In addition, anechoic chamber measurements show that the non-Foster matching circuit for small GPS antenna can lead bore-sight gain improvement by more than 17 dB.
Keywords
Electrically Small Antenna; Non-Foster Matching Circuit; Negative Impedance Converter;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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