Satellite has deployable VHF crossed Yagi antenna

NORsat-2 in space deploying its antenna. (Credit: Space Norway AS)

NORsat-2 in space deploying its antenna. (Credit: Space Norway AS)

Radio amateurs Sean Hum VA3SHV and Jeff Nicholls VA3NGJ worked on the design for a deployable VHF crossed Yagi antenna on the recently launched NORsat-2.

The very high frequency (VHF) antenna was designed to unfold from the CubeSat after receiving a command from the Norwegian Space Center to deploy once in orbit. “This antenna is a completely new type of deployable antenna — it unfolds to be more than three times as large as the satellite that took it into orbit,” says Hum. “This is the first time that a deployable antenna of this type has been contemplated and successfully used as a main mission antenna for a CubeSat.”

On July 20, cameras on board the CubeSat confirmed the successful deployment of the antenna.

Read the full story at

Join Virtual Buildathon and build satellite antenna

Chertsey Radio Club is running a virtual build-a-thon to construct a dual-band satellite antenna for 2m/70cm using low-cost parts and it’s open to all.

They will be using WebEx so access to a PC/Tablet, webcam and Internet will be needed to take advantage of the sessions.

They will be starting the virtual buildathon with the small diplexer kit by HA8LFK, kits will no more than £20 depending on shipping and import tax, as always you pay what we pay, no additional costs.

Please email chertseyradioclub <at> to register your interest.

Further information at

Dual-Band Slim Jim Antenna for Satellites

N9TAX Slim Jim mounted on top of the 3-meter mast

N9TAX Slim Jim mounted on top of the 3-meter mast

The AMSAT-SM website has an article on the dual-band omni-directional 145/435 MHz Slim Jim antenna developed by N9TAX.

Lars SM0TGU comments that the antenna works great for satellite passes below 30 degrees elevation, but signals are considerably weaker on high elevation passes.

Read the AMSAT-SM article in Google English at

Further information on the N9TAX dual-band Slim-Jim antenna is at Jim Info.html

The antenna is available via the Two Way Electronix website at