Microwave Journal
www.microwavejournal.com/articles/30065-gaas-phemt-amplifiers-optimized-for-mixers

GaAs PHEMT Amplifiers Optimized for Mixers

April 13, 2018

Product Image

Marki Microwave recently introduced two GaAs PHEMT distributed amplifiers optimized for mixer and low phase noise applications.

The ADM-5974CH covers DC to 35 GHz with 14 dB small-signal gain, +22 dBm saturated output power, 6 dB noise figure, −153 dBc/Hz phase noise at 10 kHz offset and 16 dB return loss. This amplifier provides an efficient and optimized LO drive for Marki’s mixers and is well-suited for electronic warfare, clock distribution and test and measurement applications.

The second amplifier, the ADM-5931CH, covers DC to 28 GHz and provides 11 dB small-signal gain and +18 dBm saturated output power, drawing less than 85 mA DC bias current. The amplifier’s noise figure is 6 dB, phase noise is −153 dBc/Hz at 10 kHz offset, and the return loss is 16 dB. An efficient and low power solution, this amplifier is well-suited for use as a preamp or LO driver.

With a negative gate bias voltage, Marki Microwave’s GaAs PHEMT amplifiers are optimized to provide high even-harmonic suppression while generating high odd harmonics, to emulate a square wave with low rise and fall times. Marki’s mixers are designed to uniquely take advantage of this design approach. Fabricated with a low noise PHEMT process, Marki amplifiers work well in low phase noise applications.

The ADM-5974CH and ADM-5931CH are available as bare die, with enhanced moisture resistance to improve reliability. Marki also offers a selection of amplifiers in surface-mount, 3 mm x 3 mm and 4 mm x 4 mm QFN packages or multi-chip connectorized modules.

Marki Microwave
Morgan Hill, Calif.

www.markimicrowave.com
info@markimicrowave.com