Narrow band-pass filter having resonators grouped into primary and secondary sets of different order

摘要

A narrowband filter tuned at a center frequency. The filter comprises an input terminal, an output terminal, and a plurality of resonators coupled in cascade between the input terminal and the output terminal. Each of the resonators is tuned at a resonant frequency substantially equal to the center frequency. The resonant frequencies of a primary set of the resonators and a secondary set of the resonators are of different orders.

主权项

1. A narrowband filter tuned at a center frequency of a desired pass band, comprising:
an input terminal; an output terminal; and a plurality of resonators coupled in cascade between the input terminal and the output terminal the plurality of resonators are grouped into a primary set of the plurality of resonators and a secondary set of the plurality of resonators, a resonant frequency of the primary set of the plurality of resonators and a resonant frequency of the secondary set of the plurality of resonators being of different orders, wherein the resonant frequencies of the different orders are substantially equal to the center frequency.