RADAR SYSTEM EMPLOYING INJECTION LOCKED TRANSMITTED STAGE
Assignee
MARCONI COMPANY LIMITED, THE, A BRITISH COMPANY
Filed
Nov 27, 1989
Granted
Apr 21, 1992
Location
HERTFORDSHIRE EN GB
Abstract
A radar transmitter chain employing injection locked oscillator, e.g., a magnetron, as an output stage. Problems arise with maintaining the injection locking bandwidth centered on the radar source transmit frequency. This alignment is maintained by allowing the magnetron (38) free running frequency to drift, along with its injection locking bandwidth and then to force the radar source frequency (30) to follow the magnetron frequency. A phase difference measurement (44) between the injection signal (35) and the magnetron output signal (37) provides the control for a feedback loop (60) which may control a tunable VCO (48) or selection from a bank of fixed frequency oscillators (78).
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Mar 22, 1990
Rescinded
Apr 23, 1991
Duration
1 year, 1 month
Inventor
- 1DAVID W. JOYNSON
Record Details
- Patent number
- US 5107272
- Application
- 07451713
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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