Ultra-high linearity RF passive mixer

Ultra-Q filter

Ultra-wideband fully synthesized high-resolution receiver...

Ultra-wideband variable-phase ring-oscillator arrays,...

Ultra-widebandwidth compressive receiver

Unbalanced FET mixer

Unconditionally stable filter

Unconditionally stable on-chip filter and applications thereof

Undesired signal canceller

Unified antenna diversity switching system for TDMA-based...

Unified STTD/CLTD dedicated pilot processing

Universal automotive electronic radio with display for tuning or

Universal land mobile receiver IF system

Universal platform for software defined radio

Universal platform module and methods and apparatuses...

Unlocking attenuator for automatic tuning receiver

Up-conversion of a down-converted baseband signal in a...

Up-down frequency converter for cable T.V.

Up/down converter

Up/Down tuner