20GHz Transmitter/Receiver RF over Fiber Low Noise High SFDR

SKU: LRFF

The LRFF series is a family of low-noise analog RF-over-Fiber (RFoF) transmit/receive links designed for long-distance transport of wideband RF signals with minimal degradation. These links offer a high spurious-free dynamic range (SFDR), enabling simultaneous transmission of multiple signals with widely varying power levels while maintaining excellent noise figure (NF) performance. High-SFDR operation reduces the need for heavy front-end signal conditioning, avoiding gain compression issues and simplifying separation of true signals from spurious artifacts. The transmitter uses a narrow-linewidth, high-side-mode-suppression laser coupled with an external LiNbO₃ modulator biased for high linearity, with a built-in RF pre-amplifier to improve NF and link gain. External modulation also supports WDM operation with up to 98 channels. The receiver includes a post-amplifier to boost RF output levels. The Tx and Rx are connected via customer fiber, with a circulator-based cable option enabling bidirectional operation. These high-performance links excel in applications requiring high SFDR—such as antenna testing, radar and communication test ranges, DF/ELINT systems, civil communications, antenna remoting, telemetry, and satellite communications—where strong jammers or large main-to-sidelobe power ratios coexist with weak signals of interest. For maximum SFDR performance, the L-series (Low Noise) products are preferred over the Q-series (standard).