Transformer with balanced transmission lines
First Claim
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1. A transformer comprising:
- a. a core;
b. a first insulating sheet extending around said core and a plurality of co-axial conductive tracks carried by said first insulating sheet, each conductive track forming a primary of the transformer and each having adjacent ends separated by a gap, the gaps of the different primaries being staggered from one another circumferentially relative to a common axis of the primaries;
c. a secondary extending around said core so as to be inductively coupled to said primaries;
d. a second insulating sheet lying substantially against the first insulating sheet and carrying pairs of conductors, each pair comprising a conductor disposed on each side of said second insulating sheet and defining a balanced transmission line, said transmission lines having respective ends which are staggered relative to one another so that the end of each said transmission line terminates at a position adjacent to a respective one of said gaps; and
e. means connecting the conductors of each said pair to a respective one of said adjacent ends of the associated primary.
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Abstract
A transformer has a number of single turn primary windings 5 formed by printed circuit tracks on a flexible bendable sheet 3 which is wrapped around a core of the transformer. The primary windings are connected to output terminals 12 of an enclosure 1 of the transformer by another printed circuit board 8 having further conductive tracks on opposite sides thereof to form balanced transmission lines whose impedance is matched to the impedance of the primary windings.
12 Citations
4 Claims
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1. A transformer comprising:
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a. a core; b. a first insulating sheet extending around said core and a plurality of co-axial conductive tracks carried by said first insulating sheet, each conductive track forming a primary of the transformer and each having adjacent ends separated by a gap, the gaps of the different primaries being staggered from one another circumferentially relative to a common axis of the primaries; c. a secondary extending around said core so as to be inductively coupled to said primaries; d. a second insulating sheet lying substantially against the first insulating sheet and carrying pairs of conductors, each pair comprising a conductor disposed on each side of said second insulating sheet and defining a balanced transmission line, said transmission lines having respective ends which are staggered relative to one another so that the end of each said transmission line terminates at a position adjacent to a respective one of said gaps; and e. means connecting the conductors of each said pair to a respective one of said adjacent ends of the associated primary. - View Dependent Claims (2, 3, 4)
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Specification