Abstract
A methodology for designing a frequency selective reflector with two-sided absorption bands is proposed. This method is based on utilizing multimode resonators inside a 3-D unit cell to obtain an absorption-reflection-absorption response. Detailed analysis of this 3-D absorptive frequency selective reflector (AFSR) is provided with the aid of an equivalent circuit model to reveal the operating principle. To show the benefit of the new structure in antenna's radar cross section reduction (RCSR), a dual-polarized 3-D-AFSR integrated with monopole and dipole antennas are simulated, fabricated, and then measured. Compared with their counterparts with normal ground plane, AFSR-backed antennas have shown a remarkable out-of-band RCSR. The -10 dB RCSR has fractional bandwidths of at least 64.7% and 41% with center frequencies of 3.4 and 8.3 GHz, respectively. The radiation characteristics of AFSR-backed antennas are nearly maintained. The realized gains are enhanced by 0.9 and 2.3 dB for monopole and dipole antennas mounted on a 3-D-AFSR, respectively.
| Original language | English |
|---|---|
| Article number | 8036229 |
| Pages (from-to) | 5908-5917 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 65 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 2017 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 1963-2012 IEEE.
Keywords
- Absorbers
- absorptive frequency selective reflector (AFSR)
- frequency selective structure
- radar cross section reduction (RCSR)
ASJC Scopus subject areas
- Electrical and Electronic Engineering