Couplers Direct Broadband Signals

Aug. 15, 2012
A new trio of high-directivity couplers from Marki Microwave is well suited for communications and measurement applications.

A new trio of high-directivity couplers from Marki Microwave is well suited for communications and measurement applications. Model CBR16-0003 operates from 200 kHz to 3 GHz with 30-dB typical directivity from 200 kHz to 10 MHz and 40-dB typical directivity from 10 MHz to 3 GHz. The direct-line insertion loss is typically 2 dB across the full frequency range with 16-dB typical coupling and 1.10:1 typical VSWR. Model CBR16-0006 provides similar performance from 200 kHz to 6 GHz, with 30-dB typical directivity from 200 kHz to 10 MHz and 40-dB typical directivity from 10 MHz to 6 GHz. Insertion loss for the direct path is 2.5 dB or less, with 16-dB typical directivity and 1.15:1 typical VSWR.

The highest-frequency coupler, model CBR16-0012, ranges from 200 kHz to 12 GHz with 25-dB typical directivity from 200 kHz to 20 MHz and 35-dB typical directivity from 20 MHz to 12 GHz. The direct-path insertion loss is 3.5 dB or less with 12-dB or better typical coupling and 1.25:1 typical VSWR. All three couplers measure 1.70 x 0.690 x 0.700 in. and weigh 30 g with SMA female connectors in three places.

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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