RF Solutions

Frequency Activity Detectors

API’s ability to integrate its own high performance broadband channelizers, high Q filters and low loss detectors allows them to provide stable outputs over temperature, a more tolerable RF match for the filter and improved Signal to Noise ratio to make this line of Frequency Activity Detectors (FADs).


API's Upconverters and Downconverters utilize in-house filter, amplifier and mixer designs as well as an optional dual channel frequency converter with a tunable synthesized LO, very popular in many airborne applications.

Switched Multiplexers

API’s high performance Switched Multiplexers are realized by power splitting the broadband input equally between two filter banks. Each filter bank utilizes multiplexed, switched bandpass channels forming "odd" and "even" channels. The outputs are recombined in a resistive combiner.

Frequency Multipliers

API's line of both low phase noise Frequency Multipliers and low noise, odd order, SRD based Frequency Multipliers deliver superior AM phase noise performance as well as excellent spurious levels.

Master Reference Oscillators

The line of Master Reference Oscillators (MROs) from API utilize vibration hardened, ultra low noise crystal oscillators intended for severe environments.  These MROs utilize a unique dampening structure isolating it from the detrimental effects of micro phonics on phase noise performance.

Frequency Multiplier Oscillators

The Frequency Multiplier Oscillator (FMO) is a compact 21 channel synthesized signal generator that provides transmit and LO signals for L-band and S-Band airborne radar systems. API’s unique design incorporates a isolation system for exceptional phase noise performance during vibration.

Digitally Tuned Oscillators

API offers a complete line of Digitally Tuned Oscillators (DTO). These custom designed assemblies consist of a select number of sub-band VCOs covering customer specific frequency ranges between 2GHz and 18GHz.

Voltage Controlled Oscillators

API Voltage Controlled Oscillators offer a wide selection of tuning ranges and output power to suit your particular application. These units feature low phase noise and rugged construction for demanding environmental applications.

SAW Oscillators

API’s SAW Oscillators utilize a low jitter planar SAW which translates to extremely low phase noise performance and exceptionally low accumulated jitter.  Our high performance SAW Oscillators range in frequencies from 100 MHz to 20 GH.

Comb Generators

API's Series 95 Comb Generators use a Step Recovery Diode (SRD) to generate very narrow voltage spikes; these in turn produce an output frequency spectrum rich in harmonics.

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