Switches Control Signals To 18 GHz

July 11, 2012
Three new multithrow switches from JFW Industries provide outstanding electrical performance from 0.5 to 18 GHz, low loss, high isolation, and fast switching speed.

Three new multithrow switches from JFW Industries provide outstanding electrical performance from 0.5 to 18 GHz, low loss, high isolation, and fast switching speed. Model 50S-1720 is a single-pole, double-throw (SPDT) unit with typical insertion loss of 1.5 dB through 8 GHz and no worse than 2.8 dB through 18 GHz. Isolation is typically 80 dB through 8 GHz and at least 50 dB through 18 GHz. The typical VSWR is 1.40:1 through 4 GHz and no worse than 1.90:1 through 18 GHz. Switching speed is 100 ns or less and typically only 50 ns.

The switch draws 80 mA at +5 VDC and 80 mA at -12 VDC. Model 50S-1721 is a single-pole, four-throw (SP4T) design with 1.40:1 typical VSWR to 4 GHz and 2.00:1 maximum VSWR to 18 GHz. The insertion loss is typically 2.0 dB to 8 GHz and no worse than 3.8 dB to 18 GHz. The isolation is 85 dB to 8 GHz and at least 60 dB to 18 GHz. The switching speed is 200 ns or better, with typical performance of 100 ns. The SP4T switch draws 200 mA at +5 VDC and 100 mA at -5 VDC.

Model 50S-1722 is a single-pole, eight-throw (SP8T) switch with typical VSWR of 1.50:1 to 4 GHz and better than 2.20:1 to 18 GHz. The typical insertion loss is 3.0 dB to 8 GHz and no worse than 5.0 dB to 18 GHz. The isolation is typically 90 dB to 8 GHz and better than 60 dB to 18 GHz. The switching speed is a maximum of 200 ns and typically 100 ns. The SP8T switch draws 400 mA at +5 VDC and 100 mA at -5 VDC. All three models are 50-Ω self-terminating designs that handle input power levels to +20 dBm and operating temperatures from 0 to +70°C. They include SMA female connectors and TTL control as standard features, although other versions can also be supplied.

About the Author

Jack Browne | Technical Contributor

Jack Browne, Technical Contributor, has worked in technical publishing for over 30 years. He managed the content and production of three technical journals while at the American Institute of Physics, including Medical Physics and the Journal of Vacuum Science & Technology. He has been a Publisher and Editor for Penton Media, started the firm’s Wireless Symposium & Exhibition trade show in 1993, and currently serves as Technical Contributor for that company's Microwaves & RF magazine. Browne, who holds a BS in Mathematics from City College of New York and BA degrees in English and Philosophy from Fordham University, is a member of the IEEE.

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