Articles by Altum RF

This paper looks at common system architectures for short- to medium-range AESA radars, with a focus on the front-end components used to enhance system performance. These components include the power amplifier (PA) for transmit, the low-noise amplifier (LNA) for receive, and the transmit-receive switch to connect the antenna to the electronics. Key features include the different power levels, frequency bands, and compact size required to use these systems in urban areas.

This white paper offers an overview of the advantages of gallium nitride (GaN) for high and moderate power levels in Ka-band satellite communications applications. The paper includes a discussion of the RF power amplification challenges presented by Ka-band data transmission, including the need for high power transmission, wide bandwidth and high linearity. Altum RF’s family of GaN amplifiers is presented, with illustrations of how these components suit specific scenarios within Ka-band satcom applications. The paper concludes with a demonstration of the importance of accurate modelling of electrical and thermal effects for these applications, given the high power levels and high frequencies required.

This paper discusses gallium nitride as the preferred technology over gallium arsenide for facilitating power levels up to 10 watts and providing superior performance with simpler handling and assembly requirements. Topics include circuit design implications for these higher power levels, surface mount packaging for simplified design, performance examples and applications.

This paper discusses gallium nitride as the preferred technology over gallium arsenide for facilitating power levels up to 10 watts and providing superior performance with simpler handling and assembly requirements. Topics include circuit design implications for these higher power levels, surface mount packaging for simplified design, performance examples and applications.