Self monitoring/calibrating phased array radar and an interchangeable, adjustable transmit/receive sub-assembly
US5412414A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1988 |
| Grant date | May 2, 1995 |
| Priority date | — |
| Expiry date | Apr 8, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/034
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a self monitoring/calibrating phased array radar in which the operating path for transmission and the operating path for reception may be monitored/calibrated by the addition of a corporate calibration network coupled at the plural end to the antenna elements and at the singular end to the exciter/receiver, and switching means to selectively route the monitoring/calibrating signal derived from the exciter in a transmit path to calibration path sequence or in a calibration path to receive path sequence. In one embodiment of the invention, a phase shifter common to transmit and receive paths is adjustable in increments under active logical control for calibration, while power and gain performance is monitored but not actively controlled. A novel T/R sub-assembly houses the operating electronics for four antenna elements in the form of four T/R modules with a one to four divider network in the transmit/receive path and in the calibration path. The four antenna elements are an integral part of the T/R sub-assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.