Broadband SDR, ready for the field.
Cyronics Front End Modules give your wideband SDR a real RF front end — power, clean spectrum, a rugged antenna interface, and low-noise reception across the full 1.8 MHz to 18 GHz range. One platform, every band, every mission.
The whole spectrum, one family.
From HF voice and SATCOM at 1.8 MHz all the way to microwave EW at 18 GHz — five FEM series cover the full operating range of modern wideband SDRs.
Frequency Coverage
Square-root scale · 1.8 MHz to 18 GHz
5 series · 15 boards total
HF
4 boards
V/UHF
3 boards
Ext. L
3 boards
Low MW
3 boards
Med MW
2 boards
Tip: a linear scale hides HF; a log scale crushes microwave. The √ scale is what RF engineers actually use for wideband coverage charts.
Power across the family
Native FEM output runs from 2 W (Med MW) up to 50 W (HF). With the recommended external PA, each series scales up to its mission-class power.
Tx Power Output
Watts on a log scale · dBm shown in parentheses
Native FEM output: 2 W (33 dBm) → 50 W (47 dBm). External-PA option on HF / V/UHF / Ext. L (up to 100 W) and Low MW (up to 20 W). Med MW has no external-PA path.
Four building blocks for field-ready radio.
Cyronics FEMs deliver the four RF capabilities that turn a broadband SDR into a radio you can deploy — power, clean spectrum, antenna interface, and low-noise reception.
Power
Boost milliwatt SDR output up to 5 – 100 W so a real antenna can radiate it.
Cleanliness
Filter out harmonics, spurs, and adjacent bands so you don't pollute the spectrum.
Antenna Interface
Switch Tx/Rx, match impedance, sense reflected power, protect against bad VSWR.
Better Ears
LNA, attenuators, and gain control to hear weak signals without blowing up on strong ones.
Cover every band your SDR tunes.
A broadband FEM matches your SDR's full tuning range, so the same hardware runs every mission, every band, every future waveform — no re-spin per frequency.
Covers the whole SDR band
One FEM tracks the full tuning range you already paid for.
One platform, many missions
Comms, EW, SATCOM, monitoring — all on the same hardware.
No re-spin per frequency
Change the waveform, change the band — keep the same RF chain.
Faster, cheaper to field
Skip the NRE cycle. Deploy on quarters, not years.
Future-proof
When the next waveform lands, the radio is already ready for it.
Pick your band, deploy your radio.
Each series is a complete chain — Tx and Rx, filtering, and antenna interface — optimised for its band. Order individual boards, full open-card kits, or ruggedised enclosed assemblies.
HF SDR FEM
1.8 – 30 MHz (extendable to 70 MHz)
50 W on HF — antenna tuning built in (extendable to 100 W with external PA).
V/UHF SDR FEM
30 – 512 MHz
The tactical comms workhorse — full 30 to 512 MHz, one platform.
Extended L SDR FEM
0.5 – 1.8 GHz
Bridging UHF and microwave — one chain across 0.5 to 1.8 GHz.
Low Microwave SDR FEM
1.8 – 6 GHz
1.8 – 6 GHz coverage — radar, EW, and microwave data links.
Medium Microwave SDR FEM
6 – 18 GHz
Wideband 6 – 18 GHz with a 4 GHz IF — radar and SIGINT ready.
Order one board, or the full enclosed stack.
Individual boards ship as Open Card (OC) bare PCBs for integrators. The full series ships as one Enclosed (EC) ruggedised, turnkey assembly for field deployment.
Enquire — mention FEM in the messageSKU Format
Individual board (bare PCB)
Full series (enclosed stack)
Series
HF · VU · EL
LM · MM
Item
B1 / B2 / B3 / B4
FEM = full stack
Form
OC = boards only
EC = enclosed stack
Individual board — OC
Any single board as a bare PCB, ready to integrate into a customer enclosure. Best for OEM integrators upgrading or replacing a board.
Full series — EC
All boards in one ruggedised, enclosed turnkey assembly. Ready to ship and field. Best for direct deployment.
Ready to bridge your SDR to the field?
Our RF engineers can scope a FEM configuration for your platform — band, power class, enclosure, and integration path.