A Ku-Band Dielectric Resonator Filter with Low Spurious Couplings for Input Multiplexer on Satellite

摘要

In this paper, the detail configuration of the Dielectric Resonator (DR) filter is presented. For the reason that there is no probe structure, and the entire cross couplings are realized by irises, the spurious couplings of the filter are very low. The Q factor of the filter is over 10000 and the filter offers very stable temperature ability between -10°C and +60°C (less than 1ppm/°C). Moreover, it offers 75% mass saving and footprint reduction over the TE113/TE114 dual mode invar designs. The filter uses 10-4-4 topology designs, with four out-band transmission zeros to realize high out-band rejections and four in-band transmission zeros to equalize in-band Group delay variations. Channel filters are connected by circulators. More than 100 channels have been launched into space until now, and a three channel IMUX is provided to show the performance.