Abstract
This letter presents a broadband active Van Atta array system at X -band, which is used for monostatic radar cross section (RCS) modulation and enhancement. The active system mainly consists of two uniform linear arrays (ULAs) and an active four-channel radio frequency (RF) amplifying circuit. By introducing the electrically modulated attenuator (EMA) into the active system, the transmission gain of the proposed four-channel RF amplifying circuit is controlled by a voltage signal from a control circuit and the backscattering field of the system can be sequentially modulated. The system's performance of RCS modulation and retrodirectivity are validated through measurement over a relative bandwidth of 40% centered at 10 GHz. The modulation range of monostatic RCS is generally more than 20 dB at the X -band. Its 3-dB retrodirective range and maximum equivalent RCS are 70°-120° and 1.4-3.9 dBsm varying from 8 to 12 GHz, respectively.
Original language | English |
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Article number | 9126848 |
Pages (from-to) | 840-842 |
Number of pages | 3 |
Journal | IEEE Microwave and Wireless Components Letters |
Volume | 30 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2020 |
Keywords
- Active
- Van Atta array
- modulation
- monostatic radar cross section (RCS)