Abstract
This letter presents multi-band absorbers with wide absorption bandwidths based on impedance matching theory. A wideband absorber with good absorption performance is served as a matching load for multi-band bandpass frequency selective surface (FSS) filters. As a result, the reflection coefficients of the proposed absorbers are in high accordance with the counterparts of the original bandpass FSS filters. For demonstration, a triple-band absorber with wide absorption bandwidths is designed and fabricated by cascading a triple-band bandpass FSS filter and wideband absorber together. The simulated results reveal that the proposed absorber has wide fractional bandwidths of 5.2 %, 8.0 %, and 6.4%, which is experimentally validated by the measured results.
| Original language | English |
|---|---|
| Article number | 8629031 |
| Journal | IEEE Antennas and Wireless Propagation Letters |
| Volume | 18 |
| Issue number | 3 |
| Pages (from-to) | 521-525 |
| Number of pages | 5 |
| ISSN | 1536-1225 |
| DOIs | |
| Publication status | Published - Mar 2019 |
Keywords
- Bandpass filter
- Electromagnetic absorber
- Frequency selective surfaces (FSSs)
- Impedance matching