15GHz_PA whitePlextek RFI has experience of designing GaN MMICs using the 0.25µm GaN on SiC processes of Wolfspeed (Cree), Qorvo (TriQuint), GCS, WIN Semiconductors and UMS. Our design activity has included Doherty PAs for sub-6GHz 5G, compact X-band PAs for phased array radar, very high linearity (high power handling) microwave switching functions, robust GaN LNAs, broadband GaN PA MMICs for ESM applications, and high linearity GaN PAs for point to point link applications.

The image to the top right shows a 15GHz GaN PA for point to point links. This uses Cree’s 0.25µm GaN on SiC process and offers an output power of 38dBm with an output IP3 of > 46dBm in a small die size . A technical tutorial video describing the design of this PA can be found in the Plextek RFI video library.

The image below this is a connectorised evaluation PCB for a fully integrated 3.5GHz Doherty PA designed on GCS’ 0.4µm GaN on SiC process. The IC is housed in a laminate QFN package demonstrated, it can provide a Psat of 45dBm with a peak PAE of 50%. The Doherty architecture allows a PAE of 31.5% to be achieved at 8dB power back-off. The bottom image is a photograph of an X-band GaN PA MMIC for phased array radar applications that covers 9 to 11.5GHz. It has an output power of 7W (38.5dBm) from a 29dBm drive with a Power Added Efficiency (PAE) of 42% and a die size is just 1.5mm x 2mm (allowing around 2,300 PAs to be fabricated on a single 4” diameter wafer). The design was realised on the 0.25µm gate length GaN on SiC process of UMS (GH25). A technical tutorial video describing the design of this X-band GaN PA MMIC is also available in the Plextek RFI video library.

We have also designed a number of GaN MMIC functional blocks for which we own the IP. This library of GaN MMIC IP can be used to help develop custom GaN ICs for our clients with reduced risk and timescales.


Technical publications describing  some of the GaN MMIC IP developed by Plextek RFI are available using the links below:



icon_pdf An X-band GaN PA MMIC for Phased Array Radar xband-gan-pa

icon_pdf 2-18GHz GaN PA MMIC Design

icon_pdf DC-20GHz GaN Switch Design

icon_pdf15GHz Line of Sight GaN PA Design

icon_pdf X-band 25W GaN PA MMIC


Plextek RFI is an approved 3rd party design house for the following GaN foundries:

gcs_semiQorvo Logo Brandline and TM Black RGB JPEG Filewin_semi

If you would like to discuss how Plextek RFI could develop GaN MMICs for you then please email: icon_mailto

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