Plane wave generation within a small volume of space for evaluation of wireless devices
US9615274B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2012 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Oct 4, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/0892
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Small anechoic chambers for evaluating a wireless device under test (DUT) are characterized by a set of antennas to which a test signal is applied and for which excitation coefficients are applied such that the test signal approximates a single plane wave or a preselected superposition of plane waves in the near field of the antennas. The test-equipment antennas in the chamber may be as close as one wavelength from the boundary of a test zone in which the DUT is disposed. Hence, the test zone can be in the near field of the test-equipment antennas and the test zone can be less than a wavelength from the chamber walls. Consequently, it is possible to perform tests in a small anechoic chamber that previously required a large anechoic chamber, e.g., advanced spatial channel-model tests and antenna-pattern measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.