Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Patent
1982-01-25
1984-03-20
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
333245, H01P 900
Patent
active
044384165
ABSTRACT:
An electrical device for use in delaying the time of arrival of an electrical signal with fixed increments of delay in the picosecond range and having a minimum delay time in picoseconds is disclosed. In one embodiment of the invention, the device comprises a plurality of small T shaped RF coaxial connectors fixedly coupled together in series with the connectors themselves serving as delay elements. One of the unconnected (open) ports of the connector at one end of the series is used as the entrance port for the device and the other unconnected ports of the connectors in the series are used as exit ports for the device. An electrical signal introduced into the device through the entrance port and then exiting through one of the exit ports is delayed according to the total path length travelled by the signal in passing from the entrance port to the particular exit port selected to be used as the exit port, each port in the path travelled by the signal from the entrance port to the exit port producing a time delay in the order of picoseconds, the exact number of picoseconds for a port depending on the specific type of connector employed. In another embodiment of the invention, a plurality of transmission lines having different lengths between about 10 to 100 mm etched on a printed circuit board are connected to individual double pole double throw switches which are coupled together in series, each transmission line causing a time delay of a signal passing through it of a different number of picoseconds.
REFERENCES:
patent: 3013227 (1961-12-01), Jordan
patent: 3238300 (1966-03-01), Bopp et al.
patent: 3568097 (1971-03-01), Hyltin
patent: 3781722 (1973-12-01), Pierson
patent: 4356462 (1982-10-01), Bowman
Alfano Robert R.
Schiller Norman H.
Hamamatsu Corporation
Kriegsman Irving M.
Nussbaum Marvin L.
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