Radio frequency filter

Details Radio frequency filter Radio frequency filter

H - Electricity

03

H

H03H 9/145 (2006.01) H01P 1/203 (2006.01)

Patent

CA 2116375

Abstract A filter,particularly suitable for radio frequency applications comprises a first filter which,in turn,comprises at least a pair of intercoupled resonators (RES1,RES2),and a SAW filter (SAW) which is coupled between the two intercoupled resonators so that a signal input to the filter at its input (IN) is coupled through the SAW filter to provide an output signal at its output (OUT).This provides a filter with all the advantages of a SAW filter,but with the ability to withstand the high power requirements of radio frequency applications.If three or more resonators are present in the first filter,then an amplifier can also be integrated in the filter.The SAW filter (and the amplifier if present) are inductively or capacitively coupled to the resonators depending upon the type of filter that is required.

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