Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Patent
1991-11-05
1993-01-19
Dzierzynski, Paul M.
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
333103, 307571, H03H 1120
Patent
active
051809982
ABSTRACT:
A reflection-type phase shifter employs an artificial delay line which is constructed of high impedance transmission line sections for the series inductive elements in the transmission line. Each junction between inductances in the transmission line is associated with a separate FET pair. The FET pair includes a first FET having the source to drain path coupled between the junction and a point of reference potential. The gate electrode of the first FET is coupled via the source to drain path of a second FET to the point of reference potential. The gate electrode of the second FET is coupled to one terminal of a resistor which is of a larger value compared to the ON resistance of the FET. This resistor has another terminal coupled to a control voltage source. Each junction or tap between inductors is returned to ground through an additional circuit where the gate electrode of the second FET in each circuit is coupled to that resistor which is also coupled to the gate electrode of each first FET in the FET pair. In this manner, when a given FET is selected and biased ON to implement a given length line, each FET device which is further down the chain is also operated, based on the cascade arrangement of FETs. In circuit operation, each FET which is further down the chain automatically conducts due to the difference in the ON resistance of the FET as compared to the value of the above-noted resistor. The circuit eliminates the need for complex digital control by automatically switching all the FETs ON between the FET selected and the shorted end of the transmission line.
REFERENCES:
patent: 4893035 (1990-01-01), Reynolds et al.
patent: 4994773 (1991-02-01), Chen et al.
Dzierzynski Paul M.
Ham Seung
ITT Corporation
Plevy Arthur L.
LandOfFree
Switched transmission line phase shifter apparatus employing mul does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Switched transmission line phase shifter apparatus employing mul, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switched transmission line phase shifter apparatus employing mul will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-104187