True time delay phase array radar using rotary clocks and electronic delay lines
US8629807B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2006 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Apr 15, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4034
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Local oscillator circuitry for an antenna array is disclosed. The circuitry includes an array of rotary traveling wave oscillators which are arranged in a pattern over an area and coupled so as to make them coherent. This provides for a set of phase synchronous local oscillators distributed over a large area. The array also includes a plurality of phase shifters each of which is connected to one of the rotary oscillators to provide a phase shifted local oscillator for the array. The phase shifter optionally includes a cycle counter that is configured to count cycles of the rotary oscillator to which it is connected and control circuitry that is then operative to provide a shifted rotary oscillator output based on the count from the cycle counter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.