First 28 GHz GaN front end module targets fixed wireless base stations

First 28 GHz GaN front end module targets fixed wireless base stations

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By Wisse Hettinga

The QPF4001 FEM integrates a high linearity LNA, a low loss transmit/receive switch (TR SW) and a high-gain, high efficiency multi-stage PA in a single MMIC. The compact 5- x 4-mm air-cavity laminate surface mount package is optimized for the phased array element spacing at 28 GHz for 5G base station architectures.

The QPF4001 operates from 26 GHz to 30 GHz. The receive path (LNA + TR SW) is designed to provide 17 dB of gain and a typical noise figure of 3.5 dB. The transmit path (PA + SW) provides 27 dB of small signal gain with high linearity of 35 dBc ACPR and low EVM of 3% at 23 dBm average output power, while supporting peak power of 1-W.

The new GaN FEM enables smaller, more powerful and efficient millimeter-wave, phased array systems, which will steer signals to areas of greater bandwidth demand. Using Qorvo’s highly efficient 0.15-micron GaN-on-SiC technology in this application allows the user to more efficiently achieve higher EIRP levels while minimizing array size and power dissipation, resulting in a lower cost system.

According to SNS Telecom & IT, the 28 GHz frequency band is widely preferred for early 5G-based fixed wireless access (FWA) deployments, enabling operators to meet the speed, latency, reliability and capacity requirements of 5G.

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