Microwave phase locked loops using FET frequency dividers
US4327336A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1980 |
| Grant date | Apr 27, 1982 |
| Priority date | — |
| Expiry date | Jun 5, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B19/14
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed is a microwave frequency generator for producing a microwave signal with high frequency accuracy, high spectral purity, low noise and high frequency stability. It is known to phase lock the fundamental microwave oscillator to a highly stable crystal oscillator at lower frequency and convert to a higher output frequency with a multiplier or harmonic generator but fm noise is also multiplied. The present invention avoids this problem by using MESFET frequency dividers to phase lock a microwave oscillator to a stable reference oscillator without the need for frequency multipliers. The MESFET frequency divider provides signal gain instead of loss during operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.