2.2.2 RF Applications: Radar Components

Military Applications

Based on the platform constraints three main application areas for GaN-based HEMTs are distinguished (depending on the application the available power and/or volume are limited) [29]: ground-based applications, airborne applications, and maritime applications. Phased array systems for these applications are characterized by their power-aperture product and high reliability. The frequency range includes the S-band, C-band, and X-band [30], with ultra-broadband applications reaching into the Ku-band [31].

Space Applications

Phased array systems are also used for remote sensing and earth observation for civilian and scientific purposes. Several such programs have been started [32]. Due to the immense costs of delivering cargo in near-earth orbits, reduced volume and weight, as well as low power consumption are the main goals. The high radiation levels and extreme temperatures must also be considered.

S. Vitanov: Simulation of High Electron Mobility Transistors