Multimode rectangular microstrip antenna for GPS applications

Abstract

Hand-held GPS receivers have revolutionized navigation for the dismounted soldier. This paper presents the experimental development of a single-element, multimode rectangular microstrip antenna capable of forming a spatial null. Using fundamental and higher order modes within a single microstrip patch radiator, a relatively simple, low-cost adaptive antenna capable of forming a null in the vicinity of the horizon is demonstrated. Numerical and experimental results are presented.