Subsections
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].
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
