Printed circuit board dipole antenna structure with impedance matching trace
First Claim
1. A printed antenna assembly for the transmission of electromagnetic waves, the printed antenna comprising:
- a substantially planar circuit board having a first planar surface and a second planar surface, the first and second planar surfaces being parallel and spaced by a material thickness, the circuit board including a mounting section and an antenna section integrally formed with each other;
an antenna driving circuit mounted to the first surface of the mounting section for generating electromagnetic waves to be transmitted by the printed antenna;
a pair of radiating strips formed on the antenna section of the circuit board and coupled to the antenna driving circuit for the transmission of electromagnetic waves; and
a pair of impedance matching strips formed on the antenna section of the circuit board and each coupled to one of the radiating strips, the impedance matching strips each having a length selected to substantially match the impedance of the antenna driving circuit.
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Accused Products
Abstract
A printed circuit board antenna structure for the transmission of radio frequency energy. The printed circuit board antenna of the present invention includes a circuit board subassembly having a component mounting section and an antenna section. The antenna section of the circuit board includes a pair of antenna traces that function as two sides of a dipole antenna. Each antenna trace includes a radiating strip where the combination of the pair of radiating strips has a length less than one-half the wavelength of the desired radiation being transmitted. Each antenna trace includes an impedance matching strip having a serpentine structure and coupled to the radiating strip. The impedance matching strip matches the desired impedance for the antenna driving circuit.
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Citations
19 Claims
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1. A printed antenna assembly for the transmission of electromagnetic waves, the printed antenna comprising:
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a substantially planar circuit board having a first planar surface and a second planar surface, the first and second planar surfaces being parallel and spaced by a material thickness, the circuit board including a mounting section and an antenna section integrally formed with each other;
an antenna driving circuit mounted to the first surface of the mounting section for generating electromagnetic waves to be transmitted by the printed antenna;
a pair of radiating strips formed on the antenna section of the circuit board and coupled to the antenna driving circuit for the transmission of electromagnetic waves; and
a pair of impedance matching strips formed on the antenna section of the circuit board and each coupled to one of the radiating strips, the impedance matching strips each having a length selected to substantially match the impedance of the antenna driving circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A printed antenna for the transmission of electromagnetic waves, the printed antenna comprising:
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a substantially planar circuit board formed from a dielectric material and having a first planar surface and a second planar surface, the first and second planar surfaces being parallel and spaced by a material thickness;
a mounting section contained on the circuit board;
an antenna section contained on the circuit board and integrally formed with the mounting section; and
a pair of opposed radiating and impedance matching traces formed on the first planar surface of the antenna section of the circuit board, the radiating and impedance matching traces each including a radiating strip and an impedance matching strip coupled to the radiating strip, the impedance matching strip having at least a first leg positioned parallel to the radiating strip. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification