Guerrilla RF, Inc. announced it is now sampling the GRF5123 and GRF5124, two new high gain, high linearity driver amplifiers designed specifically for 5G mMIMO transmitters. With a rated operating range of 1.8 to 5 GHz, each device can cover all major mMIMO bands with separate tunes covering 1.8 to 2.2 GHz, 2.3 to 2.7 GHz, 3.3 to 4.2 GHz and 4.4 to 4.7 GHz.
“The GRF5123/4 are specialized, high gain variants of Guerrilla RF’s popular pHEMT driver cores which are already used in 4G and 5G base station applications,” said Jim Ahne, Guerrilla RF’s vice president of automotive and 5G products. “We tailored these specific devices to yield different gain levels for 64T64R or 32T32R 5G mMIMO platforms. They adhere to a common 3x3 mm QFN-16 footprint that has become the de facto standard for many existing mMIMO systems, allowing them to be easily adopted by our customer base. Unlike existing competitive solutions, these new cores support 5 V and 3.3 V supply rails; utilizing this lower voltage can lead to a 34 percent reduction in power consumption with approximately 2 dB reductions in linearity and compression. This lower power rating can be a compelling tradeoff when considering designs typically support 32 or 64 transmit paths. In 64T64R systems, reducing the supply rail from 5 V to 3.3 V for this single core can save over 10 W of consumed power.”
When operated at 2.5 GHz with a 5 V supply and only 100 mA of current, the GRF5123 delivers 37.4 dB of gain, 22.9 dBm of OP1dB compression, 38.6 dBm of OIP3 linearity, and a low noise figure of 1.2 dB. The GRF5124 provides 40.2 dB of gain, 23.3 dBm of OP1 dB compression, 36.3dBm of OIP3 linearity, and a slightly higher noise figure of 1.6 dB. Using a 3.3 V supply typically reduces the gain by 1dB and the linearity and compression performance by 2 dB.
Samples and evaluation boards are available for the GRF5123 and GRF5124. Prices start at $1.96 (10,000-up, EXW USA).