Abstract
High-quality circular polarization is obtained using a novel concept that uses a sparse random distribution of randomly-rotated linearly-polarized antennas. Key benefit of this concept is that a very narrow circularly-polarized beam is obtained with a limited number of antenna elements. Another advantage is a significant reduction of the generated heat-flux density as compared to dense regular array concepts. Both the side lobe level and cross-polarization level can be controlled over a very wide frequency band and behaves as 1/N for large array sizes, where N represents the number of array elements. A dual-frequency 16 element demonstrator was realized to show the versatility of our concept. Measured circularly-polarized radiation patterns for scanning in the D-plane at 3.8 GHz and 5.8 GHz are in good agreement with the predicted patterns.
| Original language | English |
|---|---|
| Article number | 7546894 |
| Pages (from-to) | 736-739 |
| Number of pages | 4 |
| Journal | IEEE Antennas and Wireless Propagation Letters |
| Volume | 16 |
| Early online date | 17 Aug 2016 |
| DOIs | |
| Publication status | Published - 2017 |
Keywords
- Circular polarization (CP)
- microstrip antennas
- phased-Array antennas
- sequential rotation
- sparse arrays