Reflection type phase modulator having reduced temperature sensitivity and reduced distortion
US3961286A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1975 |
| Grant date | Jun 1, 1976 |
| Priority date | — |
| Expiry date | Mar 10, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C7/027
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An improved reflection type phase modulator having reduced temperature sensitivity and reduced distortion includes two three-port circulators coupled to form a four-port circulator. A first port is connected to a first phase modulator and a second port is coupled by means of a quarter wavelength transmission line to a second phase modulator, the transmission line being resonant at an applied unmodulated carrier frequency. The first and second phase modulators are coupled to receive a modulation signal. A third port of the circulator is coupled to receive the applied unmodulated carrier frequency and the fourth port provides a signal at the unmodulated carrier frequency which is phase modulated in response to the modulation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.