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.
Recommended Citation
S. Kharkovsky et al., "K-Band Varactor Diode-Tuned Elliptical Slot Antenna for Wideband Imaging," IEEE Transactions on Antennas and Propagation, vol. 59, no. 11, pp. 4325 - 4328, Institute of Electrical and Electronics Engineers (IEEE), Nov 2011.
The definitive version is available at https://doi.org/10.1109/TAP.2011.2164208
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)
0018-926X
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.
Publication Date
01 Nov 2011
