Slimline GaN SSPAs deliver 200-W and 400-W at X-band

Slimline GaN SSPAs deliver 200-W and 400-W at X-band

New Products |
By Wisse Hettinga

At the same time the entire SSPA product range has been rationalised, and further new models have been added that include a 1-kW C-band design and a rack-mounted 1-kW X-band amplifier.

The Diamond Microwave DM-X200-04 and DM-X400-04 are compact pulsed X-band GaN SSPAs with minimum peak pulsed output power specified at 200-W (+53 dBm) and 400-W (+56 dBm) respectively over a 1300 MHz bandwidth, operating with pulse widths up to 100µs and with duty cycles up to 15%. Saturated power gain is nominally 55 dB. Both models feature built-in phase control to optimise power combining and are a compact alternative to vacuum tube amplifiers (TWT) in demanding defence, aerospace and communications applications. The amplifiers are slimline versions of the flagship DM-X200-02 and DM-X400-02 ‘smart’ high-power amplifiers (HPA), measuring only 150- x 197- x 30-mm.

These amplifiers can be combined with an external Diamond Microwave two-way power combiner to realise a DM-X1K0-03 and to achieve in excess of 900-W peak pulse power. The DM-X200-04 and DM-X400-04 incorporate an internal electronically-adjusted phase shifter, which is used to optimise the combining phase and can be applied if alternative combiners are used.

Like all Diamond Microwave HPAs, the designs are flexible in layout and architecture and can be tailored to meet individual specifications and enclosure requirements. N-type output connectors are fitted as standard, but waveguide can be offered as an option.

“The amplifiers based on our new slimline platform are ideal for applications that do not require the sophisticated Ethernet monitoring provided by the ‘smart’ amplifier platform,” said Richard Lang, Managing Director of Diamond Microwave. “Both common platforms feature standardised mechanical and electrical interfaces, and all our designs can readily be customised to meet individual requirements. For example, we have recently produced a high-linearity model, and also a design that can employ either gate-pulsing or drain-pulsing to suit the class of amplification required.”

While standardising on interfaces and operating characteristic across its models, Diamond Microwave’s broadband 2.0 – 6.0-GHz amplifier has adopted a new enclosure design that is extremely compact for its power output. A further two new models have also been added to the range: a 1-kW pulsed C-band amplifier at 5.2 – 5.9 GHz, and an X-band 1-kW amplifier that is mounted in a 19-inch rack enclosure.

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