Antenna coupling circuit using capacitive coupling
First Claim
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1. An antenna coupling circuit for a motor vehicle using capacitive coupling, said coupling circuit comprising:
- a first plane circuit for mounting on one side of an insulator comprising a meandering conductor, a first counter electrode which is connected to one end of said meandering conductor, said first counter electrode having a surface area larger than a surface area of said meandering conductor, and a peripheral conductor at least partially surrounding said meandering conductor and first counter electrode which is connected to the other end of the meandering conductor and an inductance is formed by said meandering conductor extending between said peripheral conductor and the first counter electrode and a capacitance is formed between said peripheral conductor and the counter electrode;
a second plane circuit for mounting on another side of said insulator comprising;
a second counter electrode which is substantially the same size and shape as the first counter electrode;
an antenna connected to the second counter electrode; and
a signal feed line coupled to said meandering conductor of said first plane circuit and wherein said second plane circuit further comprises a second meandering conductor which is connected to said second counter electrode, said second counter electrode having a surface area larger than a surface area of said second meandering conductor, and a second peripheral conductor at least partially surrounding said meandering conductor and second counter electrode which is connected to the other end of the second meandering conductor, and an inductance is formed by said second meandering conductor extending between said second peripheral conductor and the second counter electrode, and a capacitance is formed between said second peripheral conductor and the second counter electrode.
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Abstract
A capacitive antenna coupling circuit including a counter electrode which is connected to one end of at least one meandering conductor and a peripheral conductor connected to the other end of the meandering conductor which forms a capacitor between itself and the counter electrode.
28 Citations
6 Claims
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1. An antenna coupling circuit for a motor vehicle using capacitive coupling, said coupling circuit comprising:
- a first plane circuit for mounting on one side of an insulator comprising a meandering conductor, a first counter electrode which is connected to one end of said meandering conductor, said first counter electrode having a surface area larger than a surface area of said meandering conductor, and a peripheral conductor at least partially surrounding said meandering conductor and first counter electrode which is connected to the other end of the meandering conductor and an inductance is formed by said meandering conductor extending between said peripheral conductor and the first counter electrode and a capacitance is formed between said peripheral conductor and the counter electrode;
a second plane circuit for mounting on another side of said insulator comprising;
a second counter electrode which is substantially the same size and shape as the first counter electrode;
an antenna connected to the second counter electrode; and
a signal feed line coupled to said meandering conductor of said first plane circuit and wherein said second plane circuit further comprises a second meandering conductor which is connected to said second counter electrode, said second counter electrode having a surface area larger than a surface area of said second meandering conductor, and a second peripheral conductor at least partially surrounding said meandering conductor and second counter electrode which is connected to the other end of the second meandering conductor, and an inductance is formed by said second meandering conductor extending between said second peripheral conductor and the second counter electrode, and a capacitance is formed between said second peripheral conductor and the second counter electrode. - View Dependent Claims (2, 3, 4, 5, 6)
- a first plane circuit for mounting on one side of an insulator comprising a meandering conductor, a first counter electrode which is connected to one end of said meandering conductor, said first counter electrode having a surface area larger than a surface area of said meandering conductor, and a peripheral conductor at least partially surrounding said meandering conductor and first counter electrode which is connected to the other end of the meandering conductor and an inductance is formed by said meandering conductor extending between said peripheral conductor and the first counter electrode and a capacitance is formed between said peripheral conductor and the counter electrode;
Specification