Tunable waveguide oscillator
US4580108A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1983 |
| Grant date | Apr 1, 1986 |
| Priority date | — |
| Expiry date | Nov 16, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B9/141
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillator formed in a rectangular waveguide (1) with both mechanical and electronic tuning comprises an oscillator device (4) spaced from a movable short-circuit termination (2) with a varactor diode (5) therebetween, the effective electrical spacing between the oscillator device (4) and the varactor (5) being approximately an integral number of half-wavelengths at the operating frequency. The varactor (5) extends into the waveguide (1) from one broad wall thereof and engages a transverse member (10) extending between the narrow walls so that only part of the height of the waveguide (1) at that region is obscured. This enables the operating frequency and hence the extent of coupling of the varactor (5) to the oscillator cavity, and thus the electronic tuning range, to be varied by adjusting the position of the short-circuit (2). To enable the operating frequency to be mechanically adjusted without greatly influencing the electronic tuning range, and E-plane stub (11) with a movable short-circuit termination (12) may be branched from the waveguide (1) at the same region as the varactor (5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.