Patent ID: 9019039
Filing Date: 2015-04-28
Classification: H01P,H03H,H03J

Abstract:
1. A radio frequency (RF) bandpass filter, the filter comprising: a cascaded series of a first subfilter and a second subfilter, the first subfilter comprising a first input port, a first output port, a first inverter, a first voltage-controlled capacitor and a first inductor, a proximal terminal of the first inverter being coupled with the first input port, the first voltage-controlled capacitor and the first inductor being connected in parallel between a distal terminal of the first inverter and ground; the second subfilter comprising a second input port, a second output port, a second inverter, a second voltage-controlled capacitor and a second inductor, a proximal terminal of the second inverter being coupled with the second input port, the second voltage-controlled capacitor and the second inductor being connected in parallel between a distal terminal of the second inverter and the second output port, an input terminal of the second inverter being coupled with the second input port; wherein: