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 50MHz 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 mproved from 0.5 dBm to 5.2 dBm.
| Translated title of the contribution | Non-Foster Matching Circuit Design to Improve VHF- and UHF-Band Small Antenna Impedance Matching |
|---|---|
| Original language | Korean |
| Pages (from-to) | 159-166 |
| Number of pages | 8 |
| Journal | 한국전자파학회 논문지 |
| Volume | 29 |
| Issue number | 3 |
| DOIs | |
| State | Published - 2018 |