K-Band Varactor Diode-Tuned Elliptical Slot Antenna for Wideband Imaging
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.
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
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)
Article - Journal
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