U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

System for measuring noise figure of a radio frequency device

Patent 6114858 Issued on September 5, 2000. Estimated Expiration Date: Icon_subject October 28, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Apparatus for measuring noise factor and available gain
Patent #: 4491783
Issued on: 01/01/1985
Inventor: Sawayama ,   et al.

Noise parameter determination method
Patent #: 4905308
Issued on: 02/27/1990
Inventor: Davidson

Measuring noise figure and y-factor
Patent #: 5191294
Issued on: 03/02/1993
Inventor: Grace, et al.

Method and apparatus for measuring electrical noise in devices Patent #: 5970429
Issued on: 10/19/1999
Inventor: Martin

Inventor

Assignee

Application

No. 181940 filed on 10/28/1998

US Classes:

324/616, Gain or attenuation324/614Signal to noise ratio or noise figure

Examiners

Primary: Metjahic, Safet
Assistant: Nguyen, Viet Q.

Attorney, Agent or Firm

International Class

G01S 007/40

Abstract

Noise factor of a radio-frequency device under test (DUT) is determined by driving the input of the DUT with a randomly modulated sine wave and measuring the power of a resulting DUT OUTPUT signal within each of a set of equally-sized frequency bands. The noise factor is computed as a combination of the power of the modulated sine wave within each of a plurality of frequency bands and the measured power of the DUT OUTPUT signal within that same plurality of frequency bands.

PatentsPlus Images
Enhanced PDF formats
loading...
PatentsPlus: add to cart
PatentsPlus: add to cartSearch-enhanced full patent PDF image
$9.95more info
PatentsPlus: add to cart
PatentsPlus: add to cartIntelligent turbocharged patent PDFs with marked up images
$18.95more info
 
Sign InRegister
Username  
Password   
forgot password?