Abstract
A fabry-perot cavity antenna (FPCA) is realized by employing a wideband, low loss, and polarization insensitive frequency selective rasorber (FSR) as a superstrate on top of a patch antenna. This configuration provides gain enhancement and low scattering in the absorption bands of the absorption-transmission-absorption (A-T-A) rasorber. More specifically, the average monostatic radar cross-section (RCS) reduction is 11 dB and 12 dB in the lower (2 to 4.4 GHz) and upper (7 to 10 GHz) absorption bands, while the maximum monostatic RCS reduction is 23 dB at 2.3 GHz and 20 dB at 8.1 GHz. The integration of the FSR does not affect other important parameters like the radiation of the patch antenna since the insertion loss is very low and on the order 0.6 dB at the transmission band. In addition, the realized gain of the primary patch antenna increases from 7.6 dBi to 11.2 dBi at the transmission frequency of the FSR, mainly due to the reflection characteristics of the bottom FSR layer which acts as a frequency selective surface (FSS) forming the fabry-perot cavity.
| Original language | English |
|---|---|
| Title of host publication | 2024 IEEE International Symposium on Antennas and Propagation and INC/USNC‐URSI Radio Science Meeting (AP-S/INC-USNC-URSI) |
| Publisher | IEEE |
| Pages | 1559-1560 |
| Number of pages | 2 |
| ISBN (Electronic) | 9798350369908 |
| ISBN (Print) | 9798350369915 |
| DOIs | |
| Publication status | Published - 30 Sept 2024 |
Keywords
- Radar cross-sections
- Absorption
- Patch antennas
- Scattering
- Insertion loss
- Propagation losses
- Fabry-Perot