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A flat limited scanning phased array antenna working at 12.2-12.7GHz and suitable for DBS satellite reception is presented. The antenna utilizes a patented phase control device that makes its architecture smart and suitable for commercial applications. Antenna architecture as well as steering principle and polarization control are described and discussed. Measured patterns of the antenna are presented as well as field experiments.

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The application of a discrete pseudomorphic high electron mobility transistor (p‐HEMT) as a grounded switch allows for the development of low cost phase shifters and phase modulators operating in a Ku band. This fills the gap in the development of phase control devices comprising p‐i‐n diodes and microwave monolithic integrated circuits (MMICs). This paper describes a discrete p‐HEMT characterization and modeling in switching mode as well as the development of a low‐cost four‐bit phase shifter and direct quadrature phase shift keying (QPSK) modulator. The developed devices operate in a Ku band with parameters comparable to commercially available MMIC counterparts. Both of them are CMOS compatible and have no power consumption. The parameters of the QPSK modulator are very close to the requirements of available standards for satellite earth stations.