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http://dx.doi.org/10.5515/KJKIEES.2018.29.3.159

Non-Foster Matching Circuit Design to Improve VHF- and UHF-Band Small Antenna Impedance Matching  

Go, Jong-Gyu (Department of Electrical and Information Engineering, Seoul National University of Science and Technology)
Chung, Jae-Young (Department of Electrical and Information Engineering, Seoul National University of Science and Technology)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.29, no.3, 2018 , pp. 159-166 More about this Journal
Abstract
Herein, a non-Foster matching circuit is designed to improve the impedance matching characteristics of small antennas in the VHF and UHF bands. The proposed non-Foster circuit is designed to operate with negative capacitance in a wide frequency band from 50 MHz to 1,000 MHz for use in various communication bands. To ensure the stability of the non-Foster circuit with conditional stability, the open-circuit stability condition of Linvill was satisfied, and the circuit was fabricated using the FR-4 substrate. The fabricated non-Foster circuit was combined with a small antenna to verify its performance by measuring the return loss and received power in the FM, DMB, and GSM bands. The measured return loss was improved from -6 dB to -30 dB, and the measured received power was improved from 0.5 dBm to 5.2 dBm.
Keywords
Broad Band Matching; Non-Foster Circuit; Small Antenna Matching; UHF Antenna; VHF Antenna;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
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