High-Performance SLCFETs for Switched Filter Applications

FET-based switched filters do not occupy a large space in the literature due to the high loss of the switches relative to other technologies. The Super-Lattice Castellated Field Effect Transistor (SLCFET) is a low loss, high isolation, broadband RF switch that meets this need. A 4 channel tunable ba...

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Bibliographic Details
Main Authors: Parke, Justin, Freitag, Ron, Torpey, Matt, Howell, Robert S., Stewart, Eric J., Snook, Megan, Wathuthanthri, Ishan, Gupta, Shalini, Nechay, Bettina, King, Matthew, Borodulin, Pavel, Renaldo, Karen, Henry, H. George
Format: Conference Proceeding
Language:English
Subjects:
Field effect transistors
Filtering theory
Insertion loss
Logic gates
Microwave filters
MMICs
Switches
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Summary:FET-based switched filters do not occupy a large space in the literature due to the high loss of the switches relative to other technologies. The Super-Lattice Castellated Field Effect Transistor (SLCFET) is a low loss, high isolation, broadband RF switch that meets this need. A 4 channel tunable band pass filter employing SLCFET switches in a splitter/combiner network was fabricated in order to demonstrate the enabling capability of the SLCFET for this application. Each filter state employed a novel, high-Q LC circuit. The insertion loss of the MMIC passbands was around -6.5 dB, of which -1.3 dB was attributable to the six Single Pole Double Throw (SPDT) switches in the network. Breakout SPDTs were measured from 0.5 to 25 GHz. Measured insertion loss at 18 GHz was -0.41 ± 0.1 dB and isolation was -28.8 ± 0.1 dB, for 35 SPDTs on the wafer.
ISSN:2374-8443
DOI:10.1109/CSICS.2016.7751044