Patent ID: 9225051
Filing Date: 2015-12-29
Classification: H01P

Abstract:
1. A method for independently tuning bandwidth and center frequencies in a bandpass filter, comprising the steps of: configuring the filter with a plurality of resonators comprising at least a first resonator and a second resonator, wherein the first and second resonators are coupled over an electrical length known as an inter-resonator coupling, and a plurality of tuning elements comprising at least a first tuning element and a second tuning element, wherein at least one of the first and second resonators has the first tuning element placed at a first location on the resonator and the second tuning element placed at a second location on the resonator; simultaneously tuning the first and second tuning elements to adjust the center frequency; and wherein the bandwidth frequency can be tuned to zero solely by changing a ratio of capacitance between the first and second tuning elements of the bandpass filter to adjust the bandwidth frequency.