The TRF3722 from Texas Instrument is a high performance direct conversion quadrature modulator which operates from 400 MHz to 4.2 GHz. It integrates a PLL and VCO and provides excellent phase noise performance to satisfy the most stringent transmit communication requirements. It also provides additional LO output for driving a second modulator or down converting mixer. The modulator provides up to 31 dBm of IP3 and features a high gain mode for a typical 3 dB gain increase and a low power mode when power optimization is desired. It is ideal for wireless infrastructure, point to point and point to multi point microwave applictions.