Integrated matched antenna structures using printed circuit techniques
First Claim
Patent Images
1. An integrated matched antenna assembly comprising:
- a printed circuit board;
a matching circuit, the matching circuit further comprising;
an inductor formed on the printed circuit board, the inductor being comprised of a conductive strip disposed on the printed circuit board and having a first and second end, a capacitive element electrically connected to the inductor, the capacitive element having first and second conductors disposed in a spaced relation to provide a capacitance, at least one of the conductors being formed on the printed circuit board; and
an antenna electrically connected directly to the inductor of the matching circuit.
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Abstract
An apparatus and method for matching an antenna having a high or low impedance with a transceiver circuit having an impedance of 50 ohms. A multilayer substrate, such as one or more printed circuit boards, is provided and has the various components of a matching circuit formed on including a capacitor and an inductor. The components are formed on the substrate using printed circuit techniques. A radiating element is connected to the matching circuit. The radiating element may be a discrete antenna or may also be formed on the substrate.
39 Citations
31 Claims
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1. An integrated matched antenna assembly comprising:
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a printed circuit board;
a matching circuit, the matching circuit further comprising;
an inductor formed on the printed circuit board, the inductor being comprised of a conductive strip disposed on the printed circuit board and having a first and second end, a capacitive element electrically connected to the inductor, the capacitive element having first and second conductors disposed in a spaced relation to provide a capacitance, at least one of the conductors being formed on the printed circuit board; and
an antenna electrically connected directly to the inductor of the matching circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An integrated matched antenna assembly for use with an electronic circuit comprising:
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a printed circuit board having a plurality of layers;
an inductor formed on the printed circuit board, the inductor being comprised of a conductive strip disposed on the printed circuit board and having a first and second end;
a capacitor electrically connected to the inductor, the capacitor having first and second conductors disposed in a spaced relation, the first conductor being formed on a first layer of the printed circuit board, the second conductor being formed on a second layer of the printed circuit board; and
an antenna electrically connected directly to the inductor, wherein the inductor and capacitor form a matching circuit for matching the impedance of the antenna to the impedance of the electronic circuit. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of matching the impedance of an antenna to an electronic circuit comprising the steps of:
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providing a printed circuit board having a plurality of surfaces;
forming an inductor on the printed circuit board by printing a conductive trace on one of the surfaces of the printed circuit board;
forming a capacitor on the printed circuit board by printing a first conductor on a first surface of the printed circuit board and printing a second conductor on a second surface of the printed circuit board;
providing an antenna;
electrically connecting the inductor to the capacitor;
electrically connecting the electronic circuit to the inductor and capacitor; and
electrically connecting the antenna to the inductor and capacitor. - View Dependent Claims (30, 31)
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Specification