Performance Evaluation and Acceptance Testing of 2kW Ku-Band HPAs
Responsibllity for carrying out the performance evaluation and acceptance testing of a new generation of 2kW Ku-Band HPAs for the European Space Agency (ESA).
Study of TDMA Burst Mode Transmission on HPA Nonlinear Behaviour
Evaluation of the effects of burst-mode transmission on HPA TWTA amplifiers, including helix-cathode supply circuit impedance variations (and resulting am/pm conversion variations) as a function of TDMA frame rate.
Study of Pre-distortion Linearisers to Reduce Signal Distortion in Transmit Chains
Investigation of different transmit chain pre-distortion techniques in terms of achievable bandwidth, realisability and stability over time.
Design of Transmit and Receive Chains for a High Power Military Earth Station
This contract involved the design of a multi-chain, very high power X-Band earth station for a Government customer. It involved 10kW klystrons and the detailed design of a high power contiguous channel multiplexer with exceptional rejection in the receive band.
Have a look at my blog post LA Confidential - X-Band & Artichokes for a bit of interesting background which followed on from this!
Design of the Up-path Power Control System for a High Power Military Earth Station
This up-path power control system had to be of high accuracy and handle various signal types, including CDMA stacks.
Design, Development and Manufacture of an Up-path Power Control System for TV Uplink Stations
This novel product ensured that satellite transponders were held at saturation (or at a precise input back-off), independant of uplink fading or uplink station antenna de-pointing.