The MAMF-011015 is an 8 - 11 GHz multifunction GaAs MMIC designed for communication radar and weather applications. It functions in combination with an advanced Si serial-controller which addresses the GaAs chip for the necessary RX/TX selection path and the required signal controls, along with several other functionalities.
The MAMF-011015’s GaAs chip utilizes a 0.25 μm pHEMT GaAs process which has been optimized for RF power, low noise, and RF signal control applications which is ideal for high levels of integration on a single IC. This GaAs MMIC includes a “Common path” circuit where it incorporates a 4-BIT digital attenuator, a 6-BIT digital phase shifter, and a T/R SPDT switch for RX/TX selection. The “RX path” incorporates a low noise amplifier and 2 additional higher attenuation bits. The “TX path” driver amplifier is designed to deliver sufficient RF power and gain for an outside power amplifier.
The MAMF-011015’s Si serial-controller chip is designed to address the GaAs chip’s common path signal control components along with several other functionalities such as external G/D control enabling or disabling internal gate/drain switching of the LNA or driver amplifier. When internal gate switching is disabled, external drain switching may be used for fast T/R switching (pulsing).