Ka-Band MMIC With High Linearity For SatCom Terminals

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It maintains signal fidelity by allowing Earth stations to transmit at high RF levels without sacrificing the signal quality

Satellite communication systems use complex modulation schemes to achieve the blazingly fast data rates required to deliver video and broadband data. To attain this, they must deliver high RF output power while simultaneously ensuring the signals retain their desired characteristics.

Now the new GMICP2731-10 GaN MMIC power amplifier designed by Microchip Technology Inc. helps meet the above requirements for commercial and defence satellite communications, 5G networks and other aerospace and defence systems.

Fabricated using GaN-on-Silicon Carbide (SiC) technology, the GMICP2731-10 delivers up to 10W of saturated RF output power across the 3.5 GHz of bandwidth between 27.5 to 31 GHz. Its power-added efficiency is 20%, with 22 dB of small-signal gain and 15 dB of return loss. A balanced architecture allows the GMICP2731-10 to be well matched to 50-ohms and includes integrated DC blocking capacitors at the output to simplify design integration.

“As communication systems employ complex modulation schemes such as 128-QAM and as the power of solid-state power amplifiers (SSPAs) trends ever upwards, RF power amplifier designers have the difficult challenge of finding higher power solutions while at the same time reducing weight and power consumption,” said Leon Gross, vice president of Microchip’s Discrete Products Group business unit. “GaN MMICs used in high power SSPAs can achieve greater than 30% lower power and weight as compared to their GaAs counterparts, which is a huge gain for satellite OEMs. This product delivers on the promise of GaN and enables the size, weight, power and cost OEMs are searching for.”

The GMICP2731-10 is available today in volume production. Microchip also provides board design support to help with design-ins and offers compact models for the GMICP2731-10, which allow customers to model the performance and expedite the design of the power amplifier in their systems more easily.


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