Rebecca L Hart

US Patent:

49069470, Mar 6, 1990

Filed:

Mar 13, 1989

Appl. No.:

7/322173

Inventors:

Rebecca A. Hart - Plymouth MN
John R. Lamberg - Minnetonka MN
Donald R. Singh - Minneapolis MN

Assignee:

Honeywell, Inc. - Minneapolis MN

International Classification:

H03B 914

US Classification:

331107SL

Abstract:

A voltage-controlled oscillator (VCO) especially designed for use in the millimeter wave frequency band (Ka-band) and which exhibits an adjustable tuning sensitivity. A low tuning sensitivity is easily obtained, making it suitable for narrow-band FMCW applications. It comprises a Gunn diode as a negative resistance device and a voltage variable capacitance diode (varactor) as a tuning element. A fixed capacitance element is coupled in RF series with the varactor and microstrip transmission lines are configured to function as impedance matching, resonating and filtering elements. By incorporating the fixed capacitance in RF series with the varactor, the tuning sensitivity, measured in volts/Hz is markedly reduced. The VCO uses a novel RF structure which puts the fixed capacitance in RF series with the varactor, without introducing the fixed capacitance element in the varactor bias circuitry.

US Patent:

51092050, Apr 28, 1992

Filed:

Nov 8, 1990

Appl. No.:

7/610756

Inventors:

Rebecca A. Hart - Plymouth MN
John R. Lamberg - Minnetonka MN

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

H01P 115

US Classification:

333104

Abstract:

A millimeter wave microstrip shunt-mounted PIN diode switch having its DC ground separate from RF ground is created by utilizing a fan structure (radial stub) having a radius of approximately one-quarter wavelength to provide an RF ground at that location and then coupling the DC bias supplies to that RF ground location. By doing so and by proper attention to known design practices for laying out microstrip circuitry, the need for blocking capacitors required by prior art arrangements is eliminated.

US Patent:

48375292, Jun 6, 1989

Filed:

Mar 24, 1988

Appl. No.:

7/172446

Inventors:

Michael J. Gawronski - Minneapolis MN
Steven L. Palmquist - Minnetonka MN
John R. Lamberg - Minnetonka MN
Rebecca A. Hart - Plymouth MN

Assignee:

Honeywell, Inc. - Minneapolis MN

International Classification:

H01P 508

US Classification:

333 33

Abstract:

A side-launch transition for efficiently joining a coaxial transmission line or coaxial connector to a microstrip transmission line for operation at millimeter wave frequencies. The microstrip transmission line comprises a conductive microstrip pattern on one side of a dielectric substrate and a ground plane on the other. The conductive microstrip pattern includes a rectangular terminal pad area of a predetermined length designed to be approximately equal to the wavelength of the signal being transmitted. This pad area is integrally joined to the microstrip line. A circular iris or aperture, is formed through the ground plane and is in a centered alignment with the terminal pad on the opposite side of the substrate. A small hole extends through the center of the iris and penetrates the substrate as well as the conductive pad area. The outer shield conductor of the coaxial transmission line or the coaxial connector and the dielectric material insulating it from its center conductor are stripped back to expose a predetermined length of center conductor which is then fitted through the small hole from the ground plane side of the substrate and soldered to the conductive pad.

US Patent:

45905118, May 20, 1986

Filed:

Jan 3, 1984

Appl. No.:

6/567710

Inventors:

Curtis J. Bocchi - St. Paul MN
Donald A. Eide - Maple Grove MN
Rebecca A. Hart - New Hope MN

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

H04N 964
H04N 974

US Classification:

358 21R

Abstract:

In combination: apparatus isolating the chroma information from a quadrature modulated color subcarrier video signal; and apparatus transforming said chroma information into an analog voltage having distinguishable levels uniquely representative of distinguishable hues of the composite signal.

US Patent:

47959894, Jan 3, 1989

Filed:

Feb 11, 1988

Appl. No.:

7/154748

Inventors:

Rebecca A. Hart - Plymouth MN
Michael J. Gawronski - Minneapolis MN

Assignee:

Honeywell, Inc. - Minneapolis MN

International Classification:

H01P 519
G01R 2704

US Classification:

333116

Abstract:

A microwave and millimeter wave hybrid or monolithic microstrip test probe assembly provides a noninvasive radio frequency test point in a microstrip circuit. The probe assembly comprises a microstrip coupler. (12) adjacent a microstrip line (10) in the circuit for sampling a small amount of microwave energy propagating along said microstrip line. A stripline circuit (20, 22 and 24) is connected to the microstrip coupler. The stripline circuit includes a pad area (24) and a probe (26) moveable to overlay the pad area. The probe forms a ground plane with respect to the pad area, and a coaxial line (34) has an outer conductor connected to the probe and an inner conductor projecting through a hole in the probe. The probe assembly provides an RF test point within a microstrip circuit which allows an accurate, calibrated and repeatable means of sampling a microstrip signal while not affecting the normal performance of the hybrid or monolithic circuit. The probe (26) is removable and is introduced into the circuit for testing purposes.