Eric W. Strid - Portland OR Andrew C. Davidson - Portland OR
Assignee:
Cascade Microtech, Inc. - Beaverton OR
International Classification:
G01R 2704
US Classification:
324601
Abstract:
A method for correcting inaccuracies in error factors of an error model used for vector-corrected, microwave-frequency measurements. Verifying de-embedded measurements are compared to known characteristics of at least one verification standard. At least one parameter of the calibration standards, or an error factor, or measuring network geometry, is changed and the error factors are recalculated to bring the verifying measurements into conformity with the known characteristics of the verification standard.
A method of determining a receiver's noise parameters by measuring one noise power for a first source noise temperature and a plurality of noise powers for another source noise temperature, all at known different source reflection coefficients.
Method Of Compensating For Frequency Errors In Noise Power Meters
Bernard W. Leake - Beaverton OR Andrew C. Davidson - Portland OR
Assignee:
Cascade Microtech, Inc. - Beaverton OR
International Classification:
G01S 740 H04B 116
US Classification:
324 57N
Abstract:
A method of measuring and compensating for measurement frequency inaccuracies encountered when measuring noise power of a device under test within a desired calibrating frequency range. The method includes sweeping a frequency synthesizer through a frequency range which includes the desired measurement frequency range. Power is measured for different synthesizer frequencies with the noise power meter set to the desired frequency range. Alternatively, the frequency synthesizer may be set to the desired measurement frequency and the noise power meter swept through a range including the desired measurement frequency. The resulting power measurements show the frequency range within which the noise power meter actually measured power. The difference between the desired measurement frequency range and the actual measurement frequency range is the measurement frequency error which may be corrected using a frequency conversion stage to displace test signals by the amount of the measurement frequency error before they are sent to the noise power meter.
Method For Measuring The Electrical And Optical Performance Of On-Wafer Microwave Devices
Scott H. Rumbaugh - Lake Oswego OR Andrew C. Davidson - Portland OR
Assignee:
Cascade Microtech, Inc. - Beaverton OR
International Classification:
G01R 2704 G06F 1520
US Classification:
324158R
Abstract:
A method for on-wafer testing of microwave devices, such as photodiodes, including a biasing method applicable when the device has a lower end connected to the ground plane of the wafer. Elements having a diode-like characteristic, such as photodiodes, are arranged side-by-side with the device, each preferably being of like geometry with the device, and each having an end connected to the ground plane. A first voltage is applied between the ground conductors of the probe and the ground plane of the wafer to place each element in forward-biased condition thereby creating a return path for the lower end of the device to the ground conductors located on the upper side of the wafer. The method further includes a calibration method for accurate measurements of photodetectors particularly when they are biased as described above, including measuring a performance parameter, such as responsivity, that characterizes the optical performance of the photodetector, measuring a network parameter, such as a reflection coefficient, that characterizes the electrical performance of the photodetector, and determining an adjusted value for the performance parameter based on the network parameter in which the reference plane of the measured performance parameter has been shifted so as to better characterize the intrinsic response of the photodetector without interference by the surrounding measurement environment. Specific steps for removing probe effects and return path diode effects are described.
HMB - Columbus, Ohio Area since Jun 2012
Associate Consultant
Sound Communications Mar 2010 - Jul 2012
Systems Specialist
USCENTCOM Jan 2009 - Nov 2009
Executive Officer
Insight Global 2008 - 2009
Help Desk
Education:
University of Dayton 2002 - 2006
B.S., Computer Engineering
Skills:
Military Leadership Military Operations Command Operational Planning Information Operations
Dr. Davidson graduated from the University of North Carolina School of Medicine at Chapel Hill in 1969. He works in New Bern, NC and specializes in Ophthalmology. Dr. Davidson is affiliated with Carolinaeast Medical Center and Carteret Healthcare.
Dr. Davidson graduated from the Columbia University College of Physicians and Surgeons in 2008. He works in Hartford, CT and 2 other locations and specializes in Cardiovascular Disease. Dr. Davidson is affiliated with Saint Francis Hospital & Medical Center.
faced heavy pressure from the White House and from Ken Cuccinelli, who was named acting director of the agency in June. John L. Lafferty, asylum division chief for six years, recently was reassigned to a service center and replaced on an acting basis by Andrew Davidson, who oversaw fraud detection.
Date: Sep 19, 2019
Category: World
Source: Google
Temple vs. Army: A tough Week 1 challenge against the triple option
In the running game, Army will rely on sophomores Jordan Ashberry at A-Back and Tyler Campbell at T-Back as well as Andrew Davidson at fullback. In the passing game, theres not much of a threat outside of Edgar Allen Poe not the poet.
Date: Sep 02, 2016
Category: Sports
Source: Google
Fitch Affirms American Equity's Ratings; Outlook Stable
Madison Street Chicago, IL 60602 or Secondary Analyst R. Andrew Davidson, CFA Senior Director +1-312-368-3144 or Committee Chairperson Mark E. Rouck, CPA, CFA
Date: Jun 24, 2014
Category: Business
Source: Google
Fitch Rates Guardian Life's New Surplus Notes 'AA-'; Outlook Stable
Fannie Mae and Freddie Mac could use that senior- subordinated structure as a template, Andrew Davidson, head of consulting and analytics firm Andrew Davidson & Co., said. They could also bundle credit-default swaps offering them protection on mortgage pools into bonds and sell those to invest
uly for the third time in four months, the National Association of Realtors said. Sales are lagging behind last year's pace the weakest since 1997. "There seems to be a correlation between the stock market and home prices," said Andrew Davidson, a New York-based mortgage industry consultant.
July for the third time in four months, the National Association of Realtors said. Sales are lagging behind last year's pace the weakest since 1997. "There seems to be a correlation between the stock market and home prices," said Andrew Davidson, a New York-based mortgage industry consultant.
Sales are lagging behind last year's pace - the weakest since 1997. "There seems to be a correlation between the stock market and home prices," said Andrew Davidson, a New York-based mortgage industry consultant.
Chiltern Edge, Henley College - ND Manufacturing Engineer, Brooklands College - HND Motorsport Engineering, Oxford Brookes University - Motorsport Technology
Andrew Davidson
Work:
Brooks Rental House (Checkout) - Manager (2011)
Education:
Brooks Institute of Photography - Visual Journalism
Andrew Davidson
Education:
California State University, Sacramento - Electrical and Electronics Engineering, America River College - General Ed, University of California, Santa Barbara - Physics
About:
If you dont know me, then we probably arent friends via Google+ :)
Andrew Davidson
Work:
Under Design - Owner
Education:
Pratt Institute - Film/Video
Andrew Davidson
Education:
Kaplan University - Masters of Applied Finance, Griffith University - Information Technology
Andrew Davidson
Education:
DePaul University College of Law - Law, University of Texas at Arlington - English and History
Andrew Davidson
Work:
Darth vadar - Food service director at Death Star Canteen (1995-2005)