Diamond Microwave Unveils 200W / 400W GaN Power Amplifiers for X-Band Applications

Diamond Microwave has released a range of compact microwave GaN-based pulsed solid-state power amplifiers (SSPA) in a new ‘slimline’ format, which includes 200W and 400W models at X-band frequencies from 8.2 to 9.5 GHz. They have also refreshed their entire SSPA product range to add new models that include a 1kW C-band design and a rack-mounted 1kW 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 200W (+53 dBm) and 400W (+56 dBm) respectively over a 1300 MHz bandwidth, operating with pulse widths up to 100 µs and with duty cycles up to 15%. Saturated power gain is nominally 55 dB. Both models feature built-in phase control to optimize 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 mm x 197 mm x 30 mm.

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

While standardizing 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 1kW pulsed C-band amplifier at 5.2 – 5.9 GHz, and an X-band 1kW amplifier that is mounted in a 19” rack enclosure.