Two‐dimensional transmit arrays for polar over‐the‐horizon radar

• Main Authors: Simon Henault, Ryan J. Riddolls
• Format: Article
• Language: English
• Published: Wiley 2021-10-01
• Series: IET Radar, Sonar & Navigation
• Online Access: https://doi.org/10.1049/rsn2.12080

Abstract Two‐dimensional (2‐D) transmit arrays offer many advantages over traditional over‐the‐horizon radar (OTHR) arrays, including the capability to steer and mitigate auroral clutter, a clutter type prevalent in polar operation, in all azimuth and elevation directions. The approaches of previous studies on OTHR 2‐D transmit arrays are considered suboptimal, but it can be shown that the 2‐D array is an effective OTHR transmitter when operated in an appropriate manner. A reference system derived from publicly available information on an operational OTHR array is used as a benchmark to compare the performance of various 2‐D OTHR transmit systems with respect to effective isotropic radiated power on target, sidelobe levels, and elevation selectivity.