Broadband Parametric Impedance Matching for Small Antennas Using the Bode-Fano Limit: Improving on Chu’s limit for loaded small antennas
نویسندگان
چکیده
In this work, a parametric up-converter amplifier is introduced as wideband impedance-matching network. Chu’s limit restricts the minimum Q-factor of unloaded small antennas. However, practical bandwidth (BW) antennas defined by their loaded Q-factor. By connecting antenna to an with real input impedance that several times greater than radiation resistance antenna, we propose increasing return loss, which leads reduction in and increase BW. addition, used because, comparison transistor amplifiers, it offers low-noise characteristics. The gain compensates for loss due imposed mismatch. Our simulation result shows BW improvements up 32 can be accomplished trading 2 dB noise figure (NF), compared 15 suggested lossy antenna.
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ژورنال
عنوان ژورنال: IEEE Antennas and Propagation Magazine
سال: 2022
ISSN: ['1045-9243', '1558-4143']
DOI: https://doi.org/10.1109/map.2021.3089997