학술논문
Tuning-Range Extension Strategies for Varactor-Based Frequency-Reconfigurable Antennas
Document Type
Periodical
Author
Source
IEEE Open Journal of Antennas and Propagation IEEE Open J. Antennas Propag. Antennas and Propagation, IEEE Open Journal of. 4:1087-1094 2023
Subject
Language
ISSN
2637-6431
Abstract
Tuning range extension strategies for varactor-based frequency-reconfigurable planar patch antennas are presented. The three tuning range optimization methods described in the paper include co-optimization of antenna dimensions and varactor properties, exploitation of multiple radiation modes, and reduction of parasitic capacitance. The first two strategies are emphasized by briefly reviewing two previously reported wide tuning range frequency-agile planar antennas. Importantly, the influence of parasitic capacitance on reducing the tuning range of the varactor-based frequency-reconfigurable antennas is then demonstrated by examining two antennas. The three tuning range extension methods are then combined to further expand the frequency tuning range of a reported frequency-reconfigurable antenna. The antenna has been re-designed, fabricated and experimentally characterized to demonstrate enhanced performance, which validates the proposed techniques, and their simultaneous application to reconfigurable antenna designs.