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This paper presents the design approach and test results of a full passive, decade bandwidth GaAs MMIC, composed by a phase shifter (PS) with a cascaded absorptive SPDT switch, suitable for T/R modules in Active Electronically Scanned Array (AESA). The proposed PS — fabricated using a GaAs 0.25 PHEMT process — combines all-pass filters (APF) with high-pass filters (HPF), in order to provide less than...
A comprehensive analysis of the radiation properties of an electrically small folded ellipsoidal helix antenna (EHA) is presented, showing its ability to self-resonate and impedance match without external components. Three antennas with different sizes and geometries have been designed to work at the 2.4-GHz ISM band and are realized using a selective laser sintering (SLS)-based fabrication process...
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