Testbed for Digital Arrays Assisted Broadband Multi-Beam Transmission

The existing phased array equipment usually adopts sub-aperture or sub-timeslot to realize multi-target jamming, but the former cannot take advantage of full aperture gain, and the latter cannot allocate the time-domain resource smoothly when the number of targets is large. In order to solve this problem, this paper proposes a method to adjust the integer and fractional delays in order to realize the purpose of large bandwidth digital transmission. The integer delay is realized by sampling interval delay, and the fractional delay is realized by Farrow filter. The key delay characteristics are simulated, and the minimum scale digital array prototype is constructed. The test results show that the simultaneous four beams with the instantaneous bandwidth of 400 MHz are realized, the direction and power of jamming beam can be adjusted arbitrarily, and the delay characteristics are also consistent with the simulation results.