High-isolation diplexing power divider with high-frequency selectivity

摘要

A novel high-isolation microstrip diplexing power divider with highfrequency selectivity is presented in this paper. Miniaturization of the circuit by integrating the diplexer and the power divider. The presented diplexing power divider consists of input matching circuit, two bandpass filters, and two microstrip-line power dividers. By introducing source-load cross coupling, two transmission zeros at both sides of each channel can be obtained. The diplexing power divider has been fabricated and measured, and the design has been demonstrated. The measured results show a reasonable agreement with the simulated ones. The measured results show that the presented diplexing power divider exhibits sharp selectivity, high isolation, and good input/output impedance matching.