HMC392LH5

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RF amplifiers are electronic components used to amplify, or increase power, signals in the radio frequency (RF) range of the electromagnetic spectrum. They amplify the input signal by either increasing the amplitude of the voltage or power. RF amplifiers are used in various devices, such as television receivers, cell phones, broadband modems, radios, wireless speakers, and aerospace communication systems. The HMC392LH5 is a type of RF amplifier whose applications and principles of operation are discussed here.

Application

The HMC392LH5 is a low-noise GaAs monolithic doubler amplifier fabricated with HiRel’s proprietary 0.15μm GaAs pHEMT MMIC process. It is designed to operate from a single +5V supply and is optimized for operation from 1300MHz to 1550MHz. This RF amplifier offers a low noise figure of only 1.4dB and high gain of 18dB. It also features a wide dynamic range of >14dB and excellent return loss of <10.5dB.

The HMC392LH5 is ideal for applications such as VSAT and telecom transceivers, amplifiers for satellite radios, base station amplifiers, repeater transmitters, and outdoor units for digital communication systems. It can also be applied in broad band amplifiers, RF gain stages, and preamplifiers for 802.11 and 802.16 wireless local area networks.

Working Principle

The HMC392LH5 is essentially a low noise amplifier that provides optimal performance in L-band applications. It contains two separate gain blocks. The first gain block offers high linearity that is important for GMSK and EDGE modulation schemes commonly employed in cellular and satellite systems. The second gain block provides frequency doubling of the signal. This is useful for applications where the input signal must be frequency-shifted while maintaining linearity and low noise.

It also contains integrated power detectors on both the input and output signals. These detectors enable power monitoring of the input and output signals while the amplifier is in operation. This helps in ensuring that the amplifier maintains the desired level of gain and linearity. The HMC392LH5 also features integrated input and output baluns for single-ended operation. This eliminates the need for external baluns, thereby simplifying the design of the amplifier and allowing it to be operated from a single +5V power supply.

The HMC392LH5 provides for good power control and stability. It features an integrated temperature control circuit that compensates for variating device temperatures. This results in stable power and linearity, thus, improving the performance of the amplifier. It also achieves superior noise performance over the entire operating temperature range of -45°C to +85°C, which is key for the reliable operation of wireless systems.

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