Richard A Michalik

US Patent:

20130315785, Nov 28, 2013

Filed:

May 15, 2013

Appl. No.:

13/894667

Inventors:

Richard Michalik - Andover MA, US

Assignee:

Maguffin Microwave LLC - Andover MA

International Classification:

A61L 2/20

US Classification:

422119, 422295

Abstract:

An apparatus for sterilizing a fluid fitting includes a microwave source disposed in a shielded chamber, a pressure chamber inside the shielded chamber for receiving the luer lock and a sterilizing medium. The pressure chamber is in microwave communication with the microwave source. The apparatus also includes mechanical fluid clamps at each end of the pressure chamber for enabling pressurization of the pressure chamber.

US Patent:

52202925, Jun 15, 1993

Filed:

Jan 2, 1992

Appl. No.:

7/815981

Inventors:

Michael J. Bianchini - North Middleboro MA
Richard A. Michalik - Andover MA
John A. Chiesa - Dracut MA
Joanne Mistler - Marlboro MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H03L 7085
H03L 716

US Classification:

331 1R

Abstract:

A microwave oscillator is shown to include an oscillator having an output and a control port and a feedback circuit disposed between the output and the control port of the oscillator. The feedback circuit includes a modulated laser, having an input and an output, the input responsive to a portion of a signal from the output of the oscillator and a photo detector having an input and an output, the input of the photo detector responsive to a signal from the output of the modulated laser delayed by a predetermined amount of time. The feedback circuit further includes a detector having a first and a second input and an output, the first input of the detector responsive to a signal from the output of the photo detector, the second input responsive to a portion of the signal from the output of the oscillator shifted in phase to be in phase quadrature with the signal at the first input of the detector and the output of the detector coupled to the control port of the oscillator. With such an arrangement, a microwave oscillator having improved FM noise performance than known microwave oscillators is provided.

US Patent:

51500809, Sep 22, 1992

Filed:

Dec 12, 1991

Appl. No.:

7/806956

Inventors:

Michael J. Bianchini - North Middleboro MA
Christopher T. Lyons - Tyngsboro MA
Richard A. Michalik - Andover MA
Raymond C. Waterman - Westford MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H03B 104
H03B 518

US Classification:

331 99

Abstract:

An oscillator includes an amplifier having an input and an output and a feedback circuit disposed between the input and the output of the amplifier. The feedback circuit includes a plurality of resonators and a pair of switches. Each switch includes a first port and multiple connectable ports, the multiple connectable ports of each switch connected to a corresponding one of the plurality of resonators. The feedback circuit further includes a voltage-controlled phase shifter disposed in series with the switches. The oscillator further includes a discriminator circuit, responsive to signals from the feedback circuit, for providing a control signal to the voltage-controlled phase shifter for degenerating low frequency noise within the oscillator. With such an arrangement, high Q low noise resonators can be switched in and out of the circuit thus providing improved phase noise performance at high power levels with the desirable frequency agility required for a microwave oscillator.

US Patent:

53409809, Aug 23, 1994

Filed:

Dec 31, 1992

Appl. No.:

7/999645

Inventors:

Michael J. Bianchini - North Middleboro MA
Richard A. Michalik - Andover MA
John A. Chiesa - Dracut MA
Joanne Mistler - Marlboro MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H01J 4014

US Classification:

250214R

Abstract:

A microwave oscillator is shown to include an oscillator having an output and a control port and a feedback circuit disposed between the output and the control port of the oscillator. The feedback circuit includes a modulated laser, having an input and an output, the input responsive to a portion of a signal from the output of the oscillator and a photo detector having an input and an output, the input of the photo detector responsive to a signal from the output of the modulated laser delayed by a predetermined amount of time. The feedback circuit further includes a detector having a first and a second input and an output, the first input of the detector responsive to a signal from the output of the photo detector, the second input responsive to a portion of the signal from the output of the oscillator shifted in phase to be in phase quadrature with the signal at the first input of the detector and the output of the detector coupled to the control port of the oscillator. With such an arrangement, a microwave oscillator having improved FM noise performance than known microwave oscillators is provided.