Abstract
In this paper, we describe a field of view (FOV) analysis of active phased array antennas with transmitter and receiver modules (TRM) applied to each subarray stage. First, the subarray design and amplitude-tapering optimization methods are introduced. Second, a comparative analysis of the sidelobe level (SLL) and half-power beamwidth (HPBW) according to the change in the distance between the radiation elements and number of subarrays is presented. Finally, the beam characteristics according to the change in the distance between the radiation elements are analyzed under the condition of identical aperture size and number of subarrays. The beam steering angles were analyzed for boresights at 7°, 12°, and 15°. As the number of subarrays increased and the distance between the radiation elements narrowed, a lower SLL was secured during beam steering. It was confirmed that the distance between phase centers between the subarrays was dominant in the phased array antenna with subarrays.
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