Optical to microwave converter using direct modulation phase shift keying
US6741139B2 · kind B2 · utility
74Cited by
26References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jan 16, 2022 |
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.