Waveguide attenuator having coaxial probes

Details Waveguide attenuator having coaxial probes Waveguide attenuator having coaxial probes

2008-03-13

2010-06-08

Jones, Stephen E (Department: 2817)

Wave transmission lines and networks

Attenuators

Reexamination Certificate

active

07733195

ABSTRACT:
Various methods and devices are provided for attenuating RF signals propagating within a waveguide. In particular, a plurality of coaxial probes are incorporated into the waveguide for the purpose of attenuating X-band RF signals. In one embodiment, a 7-bit, 3 dB linear digital attenuator is provided having a waveguide in a racetrack configuration. Coaxial probes in communication with the waveguide are adapted to couple energy to and from a signal traveling within the waveguide. The attenuator can also include switches adapted to reflect coupled energy back into the waveguide or pass the coupled energy to a resistive termination.

REFERENCES:
patent: 4772893 (1988-09-01), Iwasaki
patent: 5309048 (1994-05-01), Khabbaz
patent: 5440280 (1995-08-01), Lord
patent: 6489856 (2002-12-01), Weigand
Application Notes for Variable Attenuators, http://americanmicrowavecorp.com/amc/sform/appnotes2/ 2003.
Setty, “Digital Step Attenuators Offer Precision and Linearity,” Microwave/Millimeter-Wave Technology (www.rfdesign.com) p. 34 (Aug. 2005).
Wade, “Rectangular Waveguide to Coax Transition Design,” QEX (w1ghz@arrl.net) p. 10 (Nov./Dec. 2006).

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