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CML launches low power GaAs pHEMT gain blocks


New devices suit microwave backhaul, radar, satcoms, 5G fixed wireless access and VSAT

CML Microcircuits has announced the CMX90G701 and CMX90G702 positive gain-slope amplifiers.

Developed using CML’s SµRF MMIC design capability, these general-purpose gain blocks are suited to a wide range of wireless applications operating in the 6 – 18 GHz frequency range, including microwave backhaul, radar, satellite communications, 5G fixed wireless access (FWA) and VSAT.

They can also be used to eliminate passive equalisers by compensating for system losses across their operating frequency range.

Both devices are fabricated using GaAs pHEMT process technology to achieve an optimal combination of high linearity, low noise and low DC power consumption. The CMX90G701 has +1dB positive gain-slope, while the CMX90G702 offers a +2dB gain-slope for applications requiring higher gain-slope compensation. Both devices deliver a small signal gain within the range of 9.5 – 11.5dB, a P1dB output rating of +10.0dBm, and a low noise figure of 3dB.

As with other devices in the SµRF family, the new gain blocks are designed for ease of use, with a high level of integration, minimising the external component count and reduced PCB footprints.

As 'plug-in', cascadable, gain blocks the CMX90G701 and CMX90G702 are said to eliminate the need for passive equalisation circuits within the system design and, thanks to an on-board active bias circuit, the devices operate over a wide supply voltage of 2 to 5V, with a typical current of 22 mA.

Additionally, the RF ports of each device are internally matched to 50 Ω, supporting rapid product development cycles, particularly for mass-market applications.

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