Abstract
This paper presents an all-passive phased-array feed network based on composite right/left handed (CRLH) transmission lines (TLs). A CRLH TL enables systematic engineering of the phase response providing phase advance in addition to phase delay. When utilized in a phased-array feed network, an all-passive 1-D frequency-scanning array can be designed with a large scanning angle range toward both positive and negative elevation angles. This unique feature cannot be realized using conventional delay lines or dispersive lines that do not contain left-handed properties. Also, unlike the previously studied CRLH-based leaky-wave antennas that provide similar 1-D continuous frequency-scanning functionality, the proposed method completely decouples the radiating antenna element from the array factor; thereby providing extra design freedom and enhanced radiation performance. To validate the added advantage, we use the proposed CRLH-based phased-array feed network to demonstrate simultaneous controllability of the radiated polarization and array current amplitude distribution.
| Original language | English (US) |
|---|---|
| Article number | 6523173 |
| Pages (from-to) | 3148-3157 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Microwave Theory and Techniques |
| Volume | 61 |
| Issue number | 8 |
| DOIs | |
| State | Published - 2013 |
Keywords
- Antenna array
- composite right/left-handed (CRLH)
- feed network
- frequency scanning
- phased array
- quasi-Yagi antenna
ASJC Scopus subject areas
- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering