SMA Monopole
Experimental Aircraft Only
The UC333 is a non-certified transponder antenna for experimental aircraft only, which includes most UAS.
Plug and Play
Simply connect the UC333 SMA monopole antenna to the transponder (e.g. using UC323 SMA-to-SMA cable) and it's ready to go.
World's Lightest & Smallest Transponder Antenna
At 7 grams and just over 2 inches long, this is the lightest and smallest transponder antenna in the world. Designed specifically for UAS, this little antenna outperforms antennas ten times its size.
The UC333 is a non-certified transponder antenna for experimental aircraft, specifically targeting small unmanned aircraft (sUAS).
Target Aircraft | Unmanned Aerial Vehicles (UAV) Experimental Aircraft Microlight Gliders Parachuters Quadcopters |
Target Applications | Transponder
1090ES ADS-B DME |
Frequency | 1030 to 1090 MHz |
VSWR (1090MHz) | 1.5:1 maximum |
VSWR (1030MHz) | 3.0:1 maximum |
Radiation Pattern | Equivalent to quarter-wave stub |
Impedance | 50 Ohms |
Polarization | Linear (Vertical) |
Gain | 0 dBi |
RF Power Handling | 300 W pk 1% duty cycle
5 W constant (CW) |
Connector | SMA Male |
Mounting Type | None |
Mounting Hole | N/A |
Max. Panel Thickness | N/A |
Length (w/o connector) | 1.79 inches (45.7 mm) typ |
Length (w/connector) | 2.14 inches (54.4 mm) typ |
Weight | 0.25 oz (7.2 g) typ
0.30 oz (8.5 g) max |
Operating Temperature | -40°C to +85°C |
Max Airspeed | TBD |
Altitude | TBD |
Material | TPE Body |
- UC333 Antenna, SMA Monopole
- Test data with VSWR & weight measurements
- Certificate of Conformance (CoC)

Login required. Please Contact Us to access downloads, FAQs, articles, help desk support, and more through our Support Portal.
Documentation

UAV and OEM Sub-System Integration Support

Volume Customer/OEM Information

