The GFR5317 linear power amplifier boosts signals in 5G repeaters, antenna systems, and automotive “shark fins.”
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Guerilla RF GRF5317 linear amplifier block diagram and pinout.
At the 2022 International Microwave Symposium (IMS), Guerilla RF announced the GRF5317, the first of a series of new 0.1 W linear power amplifiers (PAs). The amplifiers find use in 5G femtocells, repeaters, distributed antenna systems (DAS), and automotive compensators (“shark fins”).
Covering frequencies from 1.5 GHz to 2 GHz, the GRF5317 cover the n1, n2, n3, n25, n34, n39, n65, n66, n70, n80, n84, and n86 5G new radio (NR) bands. The PA features adjacent-channel leakage ratio (ACLR) levels lower than -45 dBc and IMD3 levels less than -25dBm. The PA doesn’t require the aid of supplemental linearization schemes such as digital pre-distortion (DPD). That’s important because consumer devices are extremely sensitive to cost, power, and size constraints. These constraints prohibit DPD or other linearization techniques. Such low-cost products must rely on the power amplifier’s native linearity to meet the stringent 3GPP emissions mask requirements.
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The block diagram, photographed at IMS, shows the linear power amplifiers in light blue. Guerilla RF also offers ¼-W and ½-W PAs as well. Other new products shown at IMS include the GRF53xx series drives (black in the photo) and the GRF6402, an SPI-controlled, bi-directional, 31.75 dB range digital step attenuator.
Linear PAs (blue) are part of the RF signal chain in 5G repeaters.
