A Planar Reconfigurable Aperture With Lens and Reflectarray Modes of Operation

作者：Lau Jonathan Yun^*; Hum Sean Victor

来源：IEEE Transactions on Microwave Theory and Techniques, 2010, 58(12): 3547-3555.

DOI：10.1109/TMTT.2010.2086373

• Antenna arrays
• lens antennas
• microstrip arrays
• reconfigurable antennas
• reflectarrays
• reflector antennas
• varactors

This paper presents the design and experimental characterization of a planar 6 x 6 fully reconfigurable array operating at 5.7 GHz, capable of functioning both as a reconfigurable array lens and a reconfigurable reflectarray. First, the design of the array element, which consists of two varactor diode-loaded patches coupled by a varactor diode-loaded slot, is reviewed. Next, the design and fabrication of a planar array is described, and the varactor biasing scheme is discussed in detail. Experimental results demonstrating 2-D beamforming are presented, where a broadside directivity of 20.8 dBi and a beam-scanning range of 50 degrees by 50 degrees is achieved for the lens mode. The ability of the array to also function as a reflectarray is also demonstrated, achieving a directivity of 19.4 dBi at broadside and a beam-scanning range of 60 degrees by 30 degrees. Not only is this array able to demonstrate full 2-D beamforming, it is also low-cost and easy to fabricate, making it very attractive for applications where high-gain beam-scanning is needed.

• 出版日期2010-12