System and Method for an RF Receiver

A radio-frequency (RF) front-end module comprising:

• a lumped element notch filter having an input coupled to an input port of the front-end module, the lumped element notch filter configured to reject a first frequency;
• a piezoelectric filter having an input coupled to an output of the lumped element notch filter, the piezoelectric filter having a pass band that includes a second frequency, the second frequency being a harmonic of the first frequency;
• and
• an RF amplifier coupled to an output of the piezoelectric filter.

A radio frequency system (RF) comprising:

• a lumped element notch filter having an input coupled to an input port of the RF system, the lumped element notch filter configured to reject one or more frequencies;
• a piezoelectric filter having an input coupled to an output of the lumped element notch filter, the piezoelectric filter having a pass band that includes a second frequency, the second frequency being a harmonic or intermodulation distortion product of the one or more frequencies;
• and
• an RF amplifier coupled to an output of the piezoelectric filter.

A method of processing a radio frequency (RF) signal at a first frequency, the method comprising:

• receiving the RF signal;
• notch filtering the RF signal at one or more frequencies using a lumped element notch filter to produce a first filtered signal;
• filtering the first filtered signal with a piezoelectric filter to produce a second filtered signal, the piezoelectric filter having a passband including a second frequency, wherein the second frequency is a harmonic or intermodulation distortion product of the one or more frequencies;
• and
• amplifying the second filtered signal with an RF amplifier.