US 2010/0149038 A1 · Portable Millimeter-Wave Near Field Scanner

Abstract

There is disclosed an apparatus to test an antenna. A transmitter generates a test signal radiated by the antenna under test. A near field scanner includes a field sampling probe to capture electromagnetic energy radiated by an antenna under test. An x-y positioning system including x and y positioning motors moves the field sampling probe over a measurement surface disposed proximate to the antenna under test. A quasi-optical beam transport system couples at least a portion of the captured electromagnetic energy from the field sampling probe to a scanner output port. A receiver is coupled to the scanner output port.

Claims19

Dependent claims

An apparatus to test an antenna, comprising:

a near-field scanner, comprising:
a field sampling probe to capture electromagnetic energy radiated by an antenna under test
an x-y positioning system including x and y positioning motors to move the field sampling probe over a measurement surface disposed proximate to the antenna under test
a quasi-optical beam transport system to couple at least a portion of the captured electromagnetic energy from the field sampling probe to a scanner output port
a transmitter to generate a test signal radiated by the antenna under test
a receiver coupled to the scanner output port.

3 more elements

A process for testing an antenna using a near field scanner including a field sampling probe, the process comprising:

(a) measuring amplitude and phase data for a first transmission path from an input port of the antenna through the field sampling probe to an output port of the near-field scanner
(b) determining amplitude and phase data for a second transmission path from the field sampling probe to the output port of the near-field scanner
(c) extracting amplitude and phase characteristics of a third transmission path from the input port of the antenna to the field sampling probe using the data from (a) and (b)
wherein the amplitude and phase data for the second transmission path is determined via a single-port measurement process including a plurality of reflection measurements made at the output port of the near-field scanner.

1 more element

Dependencies are inferred from the claim text.

Portable Millimeter-Wave Near Field Scanner

Life of this patent

Portable Millimeter-Wave Near Field Scanner

Life of this patent

Abstract

Claims19