Apparatus and method for a radio frequency (RF) receiver front end pre-selector tuning for improving the reduction in intermodulation distortion (IMD)

摘要

A system and method of improving the rejection of intermodulation (IM) distortion in receivers (100) employing varactor tuning preselecters by exploiting the attenuating properties of a tunable preselecter at specific voltages. The invention takes advantage of a first preselecter (101) and a second preselecter (105) already present in existing receiver circuits enabling them to provide attenuation to incoming radio frequency (RF) signals. This enables the receiver to better operate without the burden of interference and without the need to retrofit the receiver with added attenuator circuitry.