Title

K-Band Varactor Diode-Tuned Elliptical Slot Antenna for Wideband Imaging

Abstract

Small resonant elliptical slot antennas have shown great potential as imaging array elements at microwave frequencies. For high-resolution 3D imaging applications it is desirable to extend the operational frequency bandwidth of these elements. One way to achieve this is by loading the slot with a varactor diode, and electronically tuning its resonant frequency. This communication presents the design, analysis, and implementation of a varactor diode-tuned elliptical slot antenna at K-band (18 GHz-26.5 GHz). The slot antenna is then used to produce single-frequency and wideband multi-frequency synthetic aperture radar (SAR) images of two targets located at different distances to show the efficacy of using this slot for wideband imaging.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Electrically Small Antenna; Elliptical Slot; Imaging; Loaded Slot; SAR; Tunable Antennas; Varactor Diode; Antenna Arrays; Imaging Systems; Natural Frequencies; Radar Antennas; Radar Imaging; Synthetic Aperture Radar

International Standard Serial Number (ISSN)

0018926X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2011 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

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