Solid State Microwave Power Modules mean instant on time, lower output noise, and high reliability
When comparing the solid state Microwave Power Modules (MPMs) with tube based solutions in the same frequency range, they have the advantages of an instant on time; lower output noise; fast mute time; and will continue to function with inadvertent output mismatches (VSWR) while providing high reliability and a long service life.
A great example of this is TMD Technologies’ new PTS6900 Microwave Power Module. Employing the latest advances in 0.25 μm GaN MMIC technology and low loss combiners, this compact, low weight unit covers the 2 to 6 GHz frequency band at 150 W RF output power. It has a gain of 55 db adjustable from 50 to 60 dB, which aids system integration.
The PTS6900 is a fully integrated solution optimized for fast integration into EW systems; both airborne and ground-based, and is also suitable for other high power microwave applications where volume and weight are critical requirements.
The inherent high reliability of a Solid State MPM means the PTS6900 offers a predicted MTBF of over 30,000 hours for an airborne uninhabited fighter environment, at the maximum allowable baseplate temperature. Moreover, the module will survive an infinite output load VSWR at the full rated RF output power, reducing the likelihood of accidental damage.
Fast RF mute capability
As well as providing an instant start up, the PTS6900 allows the RF output to be muted in less than 1 μs – making it ideal for deception jamming. In addition, harmonic performance is -20 dBc maximum, which is much improved over a Helix TWT solution.
A comprehensive built-in test capability includes monitoring of the internal DC to DC converters and module baseplate over-temperature. An RF sample output is included to aid testing and integration of the module without the need for an additional output test coupler.
The PTS6900 is very compact measuring just 325 x 200 x 50mm at 4.5 kg making it suitable for airborne applications.
The PTS6900 operates from a power supply of + 28 V DC (optional + 270 V DC) as a standard primary source, with a maximum input power requirement of only 850 W. Efficiency is typically 20% from either +28 V or +270 V prime power input to RF output.
The PTS6900 has a military airborne environmental specification which includes the ability to operate in a condensing humidity environment. The module will operate reliably in high ambient temperatures. It offers good gain flatness without the need to incorporate a gain equalizer and is internally temperature compensated to maintain its performance across the whole operating temperature range.
The PTS6900 can be supplied with a heatsink, but is not offered as standard so that customers have the option of using their own cooling fixture. To ensure full compliance with the EMC requirements of MIL-STD-461F an internal filter is incorporated on the power supply input, making the use of an external filter unnecessary.