Injection-locked waveguide oscillator
US4642577A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1986 |
| Grant date | Feb 10, 1987 |
| Priority date | — |
| Expiry date | Mar 10, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B9/143
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An injection-locked waveguide oscillator comprises a first diode (3) having a free-running fundamental frequency above the local cut-off frequency of the waveguide (1) and a second diode (4) having a fundamental frequency below and a higher harmonic above the local cut-off frequency. The first diode (3) may be an IMPATT diode and the second diode (4) a Gunn diode. The free-running fundamental frequency of the first diode (3) is close to the higher harmonic of the second diode (4) so that the second diode (4) injection-locks the first (3). Locking in the reverse sense is inhibited by the inherent loss in conversion from the higher harmonic to the fundamental in the second diode (4), thus avoiding the need for a circulator or isolator. The two diodes (3, 4) preferably are mounted in a common waveguide (1) for a simple compact structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.