Compact Ka band microwave power modules for radar

17th March 2021

Alex Lynn

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TMD Technologies Limited (TMD), has introduced two new products to its advanced PTX range of Microwave Power Modules (MPMs). The new PTX8808 and PTX8811 operate in the technically challenging Ka band and are designed to meet the exacting needs of today’s Electronic Warfare (EW) and high-performance radar systems.

Replacing the earlier PTX8807, the new MPMs between them cover the extended frequency range of 26.5 to 40GHz, with power outputs of 60 to 160W (CW/pulsed, 100% duty cycle). The PTX8811 employs a narrower bandwidth, allowing it to be optimised to provide a higher power.

TMD’s PTX8808 and PTX8811 employ a Ka band helix, mini–Travelling Wave Tube (TWT) and a matched, high density switched mode power supply to form a single drop-in microwave amplifier unit.

This arrangement not only eliminates potentially hazardous high voltage TWT interconnections but also, by reducing overall system size, simplifies platform integration procedures. Moreover, replacing a separate TWT and power supply with one MPM eases maintainability logistics and reduces spares holdings.

User adjustments are not required because the units are already factory adjusted for optimal TWT performance. Also, they can be configured to incorporate a variety of TWT models to meet different user specifications. High electrical efficiency is designed-in, allowing a minimum of cooling and reliable operation over a wide temperature range.

Because the high voltage section is fully encapsulated, the PTX8808 and PTX8811 are able operate at high altitudes and in high humidity, thereby simplifying integration into a variety of platforms, including airborne applications.

Both of these Ka band units offer remote operation and status monitoring. Weight is just 8.5kg (19 lbs) maximum.