Meteksan Defence

Matching Network for GaN HEMT Power Amplifier
We chose NI AWR software because of its powerful load-pull analysis capabilities. In addition, it was beneficial to use the harmonic balance engine at the beginning of the design to obtain the output power and PAE information for the transistor impedance at the load port.
Dogancan Eser
Electromagnetic Design Engineer
Meteksan Defence

Matching Network for GaN HEMT Power Amplifier

Company 

Meteksan Defence is the one of the leading defense companies in Turkey. It has prioritized university-industry cooperation, especially with Bilkent University, and aims to become a long-term advanced technology products solution partner of the Turkish Armed Forces. Meteksan Defence’s mission is to develop the most creative and innovative solutions for customers in the fields of advanced design and production technologies, while taking advantage of academic infrastructure and making the company’s resources available for Bilkent University.

Challenge

The challenge was to design a power amplifier (PA) matching network for the unmatched Cree gallium nitride (GaN) high electron mobility transistor (HEMT) CGH40025F. The design goals for the PA were to 1) create an amplifier circuit that provides 25 W output power from 1.9 - 2.1 GHz for 28 V operation, 2) reach high power-added efficiency (PAE), and 3) suppress harmonics as much as possible. 

Solution

Using the load-pull template in the software, the designers obtained the load-pull contours for the transistor. At the beginning of the design, it was beneficial to use the harmonic balance engine to obtain the output power and PAE information for the transistor impedance at the load port.

Next, the designers explored the stability factor of the amplifier circuit. The final results were 25 W of output power with 50 percent PAE and 35 dB of harmonic compression. Measurement results showed the amplifier circuit provided good correlation with NI AWR software.

To continue to read the full story, click to download the PDF document below...

Related customer stories

The Microwave Office intuitive environment, the interaction of all of its simulation engines, and its integration with third-party design tools has enabled us to develop a seamless, first-time-right design process for our RF/microwave amplifiers.
Ivan Boshnakov
Senior Principal Engineer
Aerial Facilities Limited
Read story
The seamless integration of the Microwave Office and VSS software gave me more meaningful results because I was able to simulate my power amplifier circuit design’s response to the EDGE/GSM modulated input signal with one design platform. I used Microwave Office and VSS from circuit concept all the way through to product completion. I was exceptionally happy with the technical quality of the ACPR and EVM simulation results.
TriQuint Design Engineer
TriQuint (now Qorvo)
Read story
We were unable to EM this entire structure using any other EM solver and turned to AWR to give it a try. The insights gained as unveiled by AXIEM opens up new vistas in mm-wave design for Mimix.
Dr. Simon Mahon
Director of MMIC Design
Mimix Broadband (now part of M/A Com)
Read story