4-channel downconverter modules save space in military radars

March 21, 2016 // By Graham Prophet
RF and microwave component specialist and distributor Link Microtek has L3 Narda-MITEQ’s four-channel downconverter modules that feature an integrated local-oscillator distribution network, enabling designers to save space and reduce component count in military radar and direction-finding systems.

The DA4 series modules combine the Narda’s standard broadband double-balanced mixers with input limiter protection diodes and IF low-noise amplifiers into a single integrated package measuring 88.4 x 88.4 x 19.1mm, excluding connectors. Three of the four channels can be used for a monopulse radar receiver and the fourth for spur identification. The modules are also suitable for basic direction-finding applications with four antennas.


The DA4 series consists of three different modules, providing input frequency ranges of 0.5 to 2 GHz, 2 to 8 GHz and 8 to 18 GHz. All have an output IF range of 10 to 250 MHz and deliver microwave performance with a typical conversion gain of 21 dB, typical noise figure of 8.5 dB and typical output power of 10 dBm. Channel-to-channel tracking is specified as ±5 degrees for phase tracking and ±0.5dB for amplitude tracking. Equipped with SMA female connectors for the inputs and outputs, these modules can be used in ambient temperatures ranging from -54 to 85C.


Link Microtek; www.linkmicrotek.com.