Phase shifting device
US4626807A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1985 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Jun 12, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/185
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A phase shifting device including a coupling device having an input port, an output port and a further port. The further port is connected to a transmission line, along the length of which are connected a number of switches. Each switch is operable to connect a low impedance across the transmission line such that an input signal applied to the input port is reflected at a connected one of the switches to produce an output signal at the output port whose phase is shifted relative to that of the input signal by an amount dependent on the length of transmission line traversed by the input signal. Alternatively the capacitance of each of the switches may be operated so as to vary the propagation constant of the transmission line to thereby produce the required phase shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.