Non-contact rotating coupler
AssigneesNippon Steel Corporation, Systems Uniques Corporation
InventorsMasahiro Uematsu, Takashi Ojima, Kazuo Kato
Life of this patent
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Abstract
A non-contact rotating coupler for transmitting a signal through coupling capacitances formed between opposite coupling plates arranged apart from each other. In the coupling plate, an inductance for causing a parallel resonance in a signal frequency band with a stray capacity existing between a grounded conductor and a non-grounded conductor is connected between a junction point of a resistor and a capacitor and the grounded conductor or between the non-grounded conductor and the grounded conductor, thereby reducing a coupling loss.
Claims21
A non-contact rotating coupler comprising two coupling plates each including:
- an insulating plate having opposite surfaces;
- a first conductor formed on one of the opposite surfaces of said insulating plate;
- a second conductor formed on the other of the opposite surfaces of said insulating plate;
- and
- a series connection of a DC blocking capacitor and an impedance matching resistor connected between said first and second conductors, wherein:
- said two coupling plates are arranged apart form each other and opposing each other so that a coupling capacitance is formed by the first conductors of said two coupling plates and a gap is provided therebetween;
- and
- at least one of said two coupling plates further includes an inductor connected between a junction point of said resistor and said capacitor and one of said first and second conductors which is connected to said impedance matching resistor so that said inductor causes a parallel resonance in a signal frequency band with a stray capacity existing between said first and second conductors.
A non-contact rotating coupler comprising two coupling plates each including:
- an insulating plate having opposite surfaces;
- a first conductor formed on one of the opposite surfaces of said insulating plate;
- a second conductor formed on the other of the opposite surfaces of said insulating plate;
- and
- an impedance matching resistor connected between said first and second conductors, wherein:
- said two coupling plates are arranged apart form each other and opposing each other so that a coupling capacitance is formed by the first conductors of said two coupling plates and a gap provided therebetween;
- and
- at least one of said two coupling plates further includes an inductor connected between said first and second conductors so that said inductor causes a parallel resonance in a signal frequency band with a stray capacity existing between said first and second conductors.
Dependencies are inferred from the claim text.