A Wideband Reconfigurable Transmitarray Element

作者：Lau Jonathan Y^*; Hum Sean V

来源：IEEE Transactions on Antennas and Propagation, 2012, 60(3): 1303-1311.

DOI：10.1109/TAP.2011.2180475

• Antenna arrays
• array lens
• lens antennas
• microstrip arrays
• reconfigurable antennas
• transmitarray
• varactors

Transmitarrays have been shown to be viable architectures for achieving high-directivity reconfigurable apertures. Two reconfigurable transmitarray elements, using single and stacked patches, based on proximity-coupled feeding and two balanced reconfigurable bridged-T phase shifters are presented. Both designs achieve over 400 degrees of phase range and achieve average insertion losses of 3.6 dB. Compared to existing proposed transmitarray elements, the stacked-patch element has a much smaller physical profile, with a lens thickness of only 0.17 lambda in free-space, while achieving a large bandwidth of 500 MHz at 5 GHz (10%). Other considerations such as the mutual coupling and beam squint of an array using the stacked-patch element are also discussed.

• 出版日期2012-3