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.
| Original language | British English |
|---|---|
| Article number | 5981382 |
| Pages (from-to) | 4325-4328 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 59 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 2011 |
Keywords
- Arrays
- electrically small antenna
- elliptical slot
- imaging
- loaded slot
- SAR
- tunable antennas
- varactor diode