In this article, design of a microstrip ring-like diplexer for Bluetooth and ultrawide band application is presented. Two ring-like bandpass filters, operated at 2.4 and 4 GHz, are combined together to form the proposed microstrip diplexer. Several transmission zeros located at the passband edges are introduced to improve the passband selectivity. High isolation between the two passband greater than 28 dB is achieved in this study. The designed diplexer is investigated numerically and experimentally. Measured results show a good agreement with the simulated analysis.
關聯:
Microwave and Optical Technology Letter, Vol.51 no.6, pp.1518-1520
