Wave transmission lines and networks – Coupling networks – Delay lines including a lumped parameter
Patent
1997-05-12
2000-06-20
Pascal, Robert
Wave transmission lines and networks
Coupling networks
Delay lines including a lumped parameter
333140, 333156, 333164, H01P 118, H01P 900
Patent
active
060782285
ABSTRACT:
A phase shifting electric circuit (1) comprises units for conveying an input signal (V1) from a main signal input (12) to a main signal output (11). The circuit (1) has a first signal path (18), from the input (12) to the output (11), along which a connectable and disconnectable first active unit (3) is arranged and also a second signal path (19) along which a connectable and disconnectable second active unit (4) and a 180 degrees phase shifting unit (2) are arranged. By a method a selection is made which of the active units (3,4) is to be in a connected condition after which control signals (U1,U2) to the units (3,4) sets them in a connected and disconnected condition respectively with the outcome of a transmission from the output (11), depending on the selection, either a non-phase shifted signal (V1') or a 180 degrees phase shifted signal (V2'). Depending on the function of the active units (3,4) the signal (V1',V2') can also be affected in other respects than its relative phase.
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International Search Report re PCT/SE97/00621; Date of mailing of Search Report: Jul. 21, 1997.
W. Mielke, "An Active Phase Shifter for Phase Array Applications Providing Amplitude and Phase Control", 15th Europ. Microw. Conference (Sep. 9-13, 1985) Paris, France, XP002031612, pp. 572-577.
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Pascal Robert
Summons Barbara
Telefonaktiebolaget LM Ericsson
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