William J Conway

US Patent:

6867401, Mar 15, 2005

Filed:

Aug 16, 2002

Appl. No.:

10/222255

Inventors:

William Conway - Ipswich MA, US
Vincent Marini - Ipswich MA, US
Robert McGowan - Newbury MA, US
Carlos Dantas - Billerica MA, US
Timothy Smith - Georgetown MA, US

Assignee:

Communications & Power Industries, Inc. - Beverly MA

International Classification:

H05B006/70

US Classification:

219690, 219756, 333248, 137252

Abstract:

A waveguide system for passing microwave energy while blocking foreign particles from a moving gas passing through the system is provided. The system includes first and second waveguide sections and a low loss microwave window disposed between the waveguide sections to allow microwave energy to pass from the first waveguide section through the window to the second waveguide section. The system also includes a gas bypass filtration system having a first port in communication with the first waveguide section, a filter element in communication with the first port, and a second port in communication with the filter element and with the second waveguide section. The system of the invention having these features blocks, by means of the window, a gas flowing through the first waveguide section and forces that gas to flow through the gas bypass filtration system so that it enters the second waveguide section only after passing through the filter. A system designed to include a pillbox window is also provided.

US Patent:

20080224802, Sep 18, 2008

Filed:

Mar 13, 2008

Appl. No.:

12/047399

Inventors:

William J. Conway - Ipswich MA, US
Robert McCowan - Newbury MA, US
George Solomon - Columbia PA, US

Assignee:

Communications & Power Industries, Inc. - Beverly MA

International Classification:

H01P 1/22

US Classification:

333 81 B, 333 81 A

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.