ISOTEK ELECTRONICS LIMITED Patent applications |
Patent application number | Title | Published |
20120306596 | Microwave Filter - A microwave filter for filtering a microwave signal is disclosed. The microwave filter has at least one band edge at a band edge transition frequency. The filter comprises an input port and an output port. The filter also comprises a plurality of single resonators connected in parallel between the input and output ports. The filter further comprises a frequency independent electrical coupling between the input and output ports connected in parallel with the resonators. A subset of the resonators has Q values each of which are at least a factor of three higher than the Qs of each of the remaining resonators. | 12-06-2012 |
20120306590 | Band Combining Filter - A band combining filter for filtering a microwave signal having at least one band edge at a band edge transition frequency. The filter comprises a plurality of filter sections. Each filter section comprising 3dB hybrid couplers having input ports and output ports and resonators connected between the input ports and the output ports of the couplers. | 12-06-2012 |
20090231056 | Band Combining Filter - A band combining filter for passing signals in a communications band includes a plurality of cascaded directional filters. Each directional filter has at least two inputs and at least two outputs. The nth directional filter is arranged such that output signals O | 09-17-2009 |
20090072927 | TUNEABLE BANDPASS FILTER - A tuneable bandpass filter comprising a plurality of coupled resonators, the filter comprising
| 03-19-2009 |