A delay-line loaded tapered slot antenna

In this paper, a delay-line loaded Vivaldi TSA has been realized, which is fed by a microstrip line. The slot-line is etched on the ground plane of the microstrip line, and one of its sides is a narrow open port and the other side is a gradually widening slot as radiating port. At the ends of tapered flare slot, there are about 1 m long delay-lines. The unvarnished currents will go along the delay-lines without radiating energy until they go to the ends of the delay-lines. In this way, the time of appearance of the ring will be delayed about 10 ns. Without a loss of radiation efficiency, we achieve to avoid the interference between ring and target signals