Frontiers of Information Technology & Electronic Engineering
>> 2019,
Volume 20,
Issue 10
doi:
10.1631/FITEE.1800722
Frontiers of Information Technology & Electronic Engineering
Dot-shaped beamforming analysis of subarray-based sin-FDA
Affiliation(s): Air and Missile Defense College, Air Force Engineering University, Xi’an 710051, China; Shaanxi Vocational and Technical College of Transport, Xi’an 710018, China; less
Accepted: 2019-11-11
Available online: 2019-11-11
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Abstract
Phased array (PA) radar is one of the most popular types of radar. In contrast to PA, the (FDA) is a potential solution to suppress range-related interference because of its time-range-angle-dependent beampattern. However, the range-angle coupling inherent in the FDA transmit beampattern may degrade the output signal-to-interference-plus-noise ratio (SINR). We propose a method based on the analyzed four subarray-based FDAs and subarray-based planar FDAs using a sinusoidally increasing frequency offset with elements transmitting at multiple frequencies. The numerical results show that the proposed approach outperforms the existing log-FDA with logarithmical frequency offset in transmit energy focus, sidelobe suppression, and array resolution. Comparative simulation results validate the effectiveness of the proposed method.