Millimeter wave microstrip IMPATT diode oscillator
US4940953A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 5, 1989 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Sep 5, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2201/015
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A millimeter wave microstrip oscillator utilizing either a pulsed or CW IMPATT diode as the active element provides relatively high power output not available with a GUNN diode. The circuit comprises a block of a conductive metal having a channel of rectangular cross-section formed therein and including a cylindrical well formed inwardly in the block from the floor of the channel. A packaged IMPATT diode of either the pulsed or CW variety fits into the well with the cap portion of the package coplanar with the microstrip circuit pattern when the microstrip rests on the floor of the channel. The pattern includes a shunt open circuit stub and an impedance transformer connected to the terminals of the IMPATT diode for effectively matching the diode's complex impedance with the load. A conductive cover is secured to the block and a laterally and vertically movable tuning screw passes through the cover for fine tuning the oscillator's output frequency and power. The circuit is capable of producing CW or pulsed signals with appropriate choice of IMPATT diode bias signal (pulsed or DC), microstrip circuit pattern dimensions and tuning screw diameter and position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.