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Design aspects of a novel beam-reconfigurable planar series-fed array are addressed to achieve beam steering with frequency tunability over a relatively broad bandwidth. The design is possible thanks to the use of the complementary strip-slot, which is an innovative broadly matched microstrip radiator, and the careful selection of the phase shifter parameters.
A GaN HEMT-based Class E power amplifier to work in the low L-band has been designed, built and measured. Measurements exhibit a 74% Power Added Efficiency and a 15W output power performance. The prototype has been tested under continuous wave excitation, two tone input signal and a constant envelope modulated signal used for the E5 band (1.19 GHz) of the future Galileo navigation system.
Band-pass distributed amplifiers can provide optimum power performance through the proper design of the phase shifts of the unit cells and by using the so-called dual-fed configuration. In this contribution, the experimental non-linear performance of such an amplifier is described. Measurements have been taken on a 3-stage band-pass distributed amplifier prototype at 1 GHz for two different configurations:...
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