A compact ridge cavity resonator for concurrent dual-band applications

Abstract

This paper presents a compact dual-band cavity resonator based on single ridge waveguide structure. The resonator is designed for center frequencies of 5.14GHz and 8.92GHz. Unloaded quality factors up to 461 and 292 can be attained at first and second resonant frequencies, respectively. Measured response from the fabricated resonator shows resonant frequencies at 5.17GHz and 9.04GHz, which validates the concept. Design equations are provided for determining the dimensions of the resonator to obtain the desired resonant frequencies. Considerable size reduction is achieved by using the proposed ridge cavity design, while maintaining an integration friendly configuration. The proposed resonator has potential application in concurrent dual-band wireless systems.