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Military Microwaves Supplement
Nujira has released its first PA platform for military communications, halving the power dissipation for a transmitter covering an entire frequency octave. The Nujira military PA platform uses an RFMD RF3934 PA device together with a Coolteq.h envelope tracking (ET) modulator module.
The performance of this platform was compared to the performance of the same transistor in fixed drain configuration over an operating frequency range of 225 to 450 MHz, with signals with a very high peak to average power ratio (PAPR) of 10 dB. Using the Nujira ET module, the amplifier showed an efficiency improvement from 25 percent to 40 percent (which represents a halving of the power dissipation) and, as an additional benefit from ET, delivered 1.5 to 2 dB more peak power.
Tim Haynes, CEO of Nujira, said, “New military net-centric communications systems provide a secure rapid flow of voice, data and video information, and offer reliable, good quality coverage over wide bandwidths. This transmission environment is especially challenging, as the required operating frequency range is very wide and the Peak to Average Power Ratio is high. Delivering such a major efficiency improvement is a significant achievement, and offers military communications systems designers and users a considerable advantage by reducing the size and weight of the batteries required and/or extending the usage time.”
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