AlGaAs PIN diode multi-octave, mmW switches
2011
The novel use of an AlGaAs/GaAs heterojunction to form a PIN diode, with reduced RF resistance (R S ) and no change in junction capacitance (C T )[1]–[3], has been analyzed and employed in the development of several different PIN diode switches of various circuit topologies. Series designs demonstrate improved insertion loss, shunt designs improved isolation, and series-shunt designs improvements in both parameters. These switches demonstrate superior broadband performance, with low insertion loss and high isolation from 50MHz to almost 80GHz, and series-shunt switches exhibit 50% increased input power capability over equivalent homojunction GaAs PIN diode switches.
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