Compact Planar Antenna Array With Tapering in Both Planes for Desired First Sidelobe Reduction

In this letter, a new configuration of a compact low-profile tapered antenna array has been proposed to reduce the first sidelobe level (FSLL) in two orthogonal planes using a small number of nonidentical rectangular microstrip antenna elements. The tapering coefficients corresponding to cosine-square distributions over a pedestal have been used to realize amplitude tapering in two orthogonal planes of an array for suppressed sidelobe levels. The FSLL of −17.5 dB in the E plane and −15.0 dB in the H plane is practically achieved. The simulated results are verified experimentally, which are in agreement.