Abstract
In this letter, a cavity-backed dual-polarized antenna operating in X-Band (8-12 GHz) is presented. The antenna is composed of a metal cavity with a circular slot, a dual-polarized feeding balun structure printed on a single-layer substrate, and a loaded dielectric block. The units of the antenna are fixed by screws, and no additional welding assembly is required. By setting notches structure on the dual-polarized planar feeding probes, the port isolation and polarization purity of the proposed antenna have been significantly improved. A prototype with the compact size of 0.44 × 0.44 × 0.39 λ0 (λ0 is the wavelength at 10 GHz) is fabricated and measured. Measured results demonstrate the return losses are lower than 10 dB and the isolations are greater than 23 dB from 8 to 12 GHz, the measured bore-sight gains vary from 4.5 to 5.8 dBi, and the cross-polarization levels less than -20 dB are obtained within the operational band.
| Original language | English |
|---|---|
| Pages (from-to) | 913-917 |
| Number of pages | 5 |
| Journal | IEEE Antennas and Wireless Propagation Letters |
| Volume | 22 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1 Apr 2023 |
Keywords
- Array element
- cavity-backed antenna
- dual-polarized antenna
- wideband
- X-band