UMS RF Semiconductors

European leader in III-V compound semiconductor wafer foundry & MMIC design - 275+ curated products, DC-105.5 GHz

UMS

United Monolithic Semiconductors

Founded in 1998 and headquartered in Villebon sur Yvette, France, UMS is a European leader in III-V compound semiconductor wafer foundry and MMIC design. The company offers 275+ curated products covering DC-105.5 GHz, with process technologies spanning GaAs pHEMT / HBT and GaN-on-SiC platforms.

UMS products are widely used in defense radar, electronic warfare, satellite communication payloads, 5G/6G base stations, point-to-point microwave links, and test & measurement instrumentation. Multiple products are listed on the ESA EPPL for space-grade applications. As an authorized UMS distributor, TMT provides full-line product support, technical selection guidance, and procurement services.

240+ Models DC-105.5 GHz GaAs / GaN ESA Certified

Core Process Platforms

GaAs pHEMT 0.25μm / 0.15μm - Low noise, high linearity MMICs covering S to W band.

GaN-on-SiC 0.5μm / 0.25μm - High power density, covering S to Ka band, suitable for radar and electronic warfare.

GaAs HBT - High power, high-efficiency amplifier process.

Product Categories

Ten product series covering all RF front-end functions

Low Noise Amplifiers (LNA)

Ultra-low noise MMICs, DC-105 GHz, NF as low as 1.5 dB

Power Amplifiers (HPA/MPA)

GaAs/GaN power amplifiers, output power up to 50W

Variable Gain Amplifiers (VGA)

Gain adjustment range 30+ dB, excellent linearity

Mixers & Multipliers

Sub-harmonic mixers, multipliers, covering up to 105.5 GHz

VCOs (Voltage Controlled Oscillators)

Fixed frequency and wideband VCOs, excellent phase noise

Switches & Attenuators

SPDT/T switches, digital attenuators, high isolation

Phase Shifters & Core Chips

Digital/analog phase shifters, T/R core chips

Downconverters & Detectors

Integrated downconverter modules, power detectors

GaN Power Transistors

0.5μm / 0.25μm GaN-on-SiC die and packaged products

GaAs Transistors

DC-40 GHz GaAs pHEMT discrete transistors - super low noise

RF Front-End & Dividers

Power dividers, couplers, RF front-end integrated modules

Search Full Product Catalog on UMS Product Finder →

Use the official UMS Product Finder to filter by frequency, power, function, chipset, and application

UMS Naming Convention Quick Reference

Product model prefixes indicate function category - quickly identify product types

Prefix	Product Category	Description
CHA	Amplifiers	LNA, HPA, MPA, VGA - all amplifier-class products (Analog/Digital VGA, Attenuator variants)
CHM	Mixers	Sub-harmonic mixers, quadrature mixers, and frequency conversion devices
CHX / CHM	Multipliers	Frequency multipliers (e.g. CHX2192-99F). Note: CHX prefix also used in some legacy RF front-end devices
CHV	VCOs	Fixed frequency VCOs and wideband tunable VCOs
CHS	Switches & Attenuators	SPDT / T-type RF switches; digital/analog attenuators (some also use CHA prefix)
CHP	Phase Shifters & Core Chips	Digital/analog phase shifters and T/R core chips (RX-TX)
CHR	Downconverters	Integrated downconverter receiver modules
CHE	Detectors	Power detectors and envelope detectors
CHK / CHKA	GaN Power Transistors	GaN-on-SiC bare die (CHK) and packaged/flanged high-power (CHKA). For internally matched devices, see CHZ
CHZ	Internally Matched GaN	50-ohm internally matched GaN power transistors (4 SKUs)
CHC	RF Front-End	Integrated RF front-end modules (e.g. CHC6094)
CHW	Wilkinson Power Dividers	2-way and 4-way Wilkinson power dividers (4 SKUs)
EC	GaAs Transistors	GaAs pHEMT discrete transistors (e.g. EC2612-99F, DC-40 GHz Super Low Noise pHEMT)

Need UMS Product Selection Help? Contact Us

Our technical team is familiar with the full UMS 275+ product line and can provide professional model recommendations, parameter comparisons, and application solution advice.