Optical to microwave converter using direct modulation phase shift keying
US6496079B1 · kind B1 · utility
3Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 2001 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | May 22, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/25752
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A point-to-point microwave radio link that operates in a Frequency Division Duplex (FDD) mode using direct digital modulation with a Continuous Phase Shift Keyed (PSK) scheme. The transmit signal is generated by a circuit that uses a Voltage-Control Oscillator (VCO) operating in a microwave radio band to obtain the modulated signal. The VCO output is fed to a phase modulator to obtain the modulated signal. The output of the VCO is then frequency multiplied by the predetermined factor to produce the modulated microwave output signal at the desired band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.