RCS reduction of missile-borne quasi-traveling wave microstrip antenna

The reduction of a missile-borne microstrip antenna´s radar cross section (RCS) is very important for improving the stealth performance of the missile. In this paper, the principle of antenna´s RCS is firstly analyzed. By taking a kind of missile-borne quasi-traveling wave microstrip antenna as example, a new method is then presented to reduce its RCS significantly and improve its performance as well. The main point of this method is to cut two H-shape slots and install two short-circuit pins in each microstrip unit of the antenna, which reduces the RCS significantly in a wide frequency band, expends the bandwidth, and remains the gain of the antenna unchanged at the same time.