18 dBi X-Band APM


The Antenna Pointing Mechanism (APM) is a two-axis steerable mechanism with integral, high-gain X-band horn antenna, supporting high data rate downlinks on Earth observation and space science missions.

The APM has two independent axes of rotation. Each rotation axis comprises a hybrid stepper motor, spur gear transmission, and magnetic encoder. A spiral wrap DC harness passes the motor and telemetry channels through the azimuth axis to the elevation axis, while RF non-contact rotary joints are used to pass the RF feed through each axis.

The APM gained flight heritage on Surrey's NigeriaSat-2 mission (launched August 2011) and is now being operated nominally. Currently, eleven APMs are baseline on future Surrey missions, including a higher gain +18 dBi variant which will fly on TechDemoSat-1, launching 2014. A second batch of APMs is commencing manufacture in 2013, some for stock.


full datasheet


Submitting your information allows us to get in touch with you once we get a response from the supplier.

I am interested in*:

Add any additional comments that pertain to your request. The more context you can provide, the faster we'll be able to get you the information that you want.

Disclaimer: satsearch is not responsible for any mistakes on this page, although we do our best to ensure correctness. Please report any mistakes to us.

Last updated: 2018-02-22