A 11GHz Conformal Phased Array Antenna for Curved Surfaces

In this paper, a 11 GHz Conformal Phased Array Antenna is presented for curved surfaces, which has 1-bit reconfigurable radiation units, digital phase shifters, and feeding network with a low profile (0.07λ<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</inf>at 11 GHz). The 1-bit reconfigurable unit utilizes symmetric geometries and PIN diodes to realize stable 180<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">○</sup>phase change, The digital phase shifter provides 8 phase coding states and together with the unit form 16 phase coding states. The antenna operates between 10.7 and 11.4 GHz, and the array contains 8×1 elements with each of which being individually addressable. By changing the state of the diodes, the antenna can achieve ±30<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">○</sup>beam scanning without sparsity, and the gain fluctuations are less than 1dB. The antenna provides conformal beam-scanning capability with low cost, which applies to vehicle-mounted or airborne application scenarios.