Tuning bandwidth and center frequencies in a bandpass filter

摘要

A method for independently tuning bandwidth and center frequencies in a bandpass filter. The filter can be configured with a plurality of resonators, wherein the resonators are coupled over a certain coupling region. Additionally, the filter can be configured with a plurality of tuning elements. For each of the inter-resonator couplings, at least one of the resonators associated with the inter-resonator coupling can have a first tuning element placed at a first location on the resonator and a second tuning element placed at a second location on the resonator. Simultaneously tuning the first and second tuning elements can adjust the center frequency, and offset tuning the first and second tuning elements can adjust the bandwidth frequency.