System and method for testing antenna gain
US6771698B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1999 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Apr 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/20
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method for testing an antenna, such as for antenna gain, is disclosed. The system generates an antenna test signal at a selected frequency. A pulse phase modulator modulates the signal with a random pseudo-noise sequence to produce a broad band spread spectrum antenna test signal. A transmission antenna is connected to the pulse phase modulator for transmitting the broad band spread spectrum antenna test signal to a test antenna. A pseudo-noise generator generates the respective pseudo-noise sequence at a predetermined delayed time corresponding to the time delay of a spread spectrum signal from the transmission antenna through the test receiver. A mixer mixes the broad band spread spectrum antenna test signal with the generated pseudo-noise sequence for despreading the broad band spread spectrum antenna test signal. Any signals generated by any reflections or interference that is not synchronized with the original spread spectrum signals is decorrelated. The gain of the test antenna is then determined. The purpose of the invention is to avoid the need for expensive anechoic chambers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.