Array built in test
US5038146A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1990 |
| Grant date | Aug 6, 1991 |
| Priority date | — |
| Expiry date | Aug 22, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/318
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Built in test circuitry for an array transmitter. The circuitry includes a directional coupler with directivity equal to the mutual coupling between adjacent antenna elements. The direct input port of the coupler is connected to the antenna element and the direct output port of the coupler is connected to the circuitry generating the signal transmitted by the antenna element. The coupled port of the coupler feeds a detector which in turn provides an input to a control circuit. This circuit can be controlled to test, for each antenna element, the RF power driving each antenna element, the effective power radiated from each element, and the operation of the phase shifter coupled to each antenna element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.