Tunable dual and triple frequency stub loaded rectangular microstrip antennas

Abstract

Dual band printed microstrip antennas using single layer and multilayer patches have been reported. Triple band performance has been reported for a square patch antenna using a spurline filter and the perturbation technique. This paper proposes the concept of tunable dual and triple band microstrip antennas with nearly quarter wavelength monolithic stubs loaded at the radiating edges of the rectangular or square patch.