Printed wiring board and wireless communication system
First Claim
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1. A printed wiring board comprising:
- a wireless IC element configured to process a high-frequency signal;
a circuit substrate including at least two stacked insulating sheets, wherein the wireless IC element is mounted;
a loop-shaped electrode connected to the wireless IC element, mounted on one of the insulating sheets, and in or on and across the circuit substrate;
a planar-shaped radiator mounted in or on another one of said insulating sheets and connected to the loop-shaped electrode; and
a line-shaped auxiliary electrode mounted in or on said another one of said insulating sheets and connected to at least one of the loop-shaped electrode and the planar-shaped radiator;
whereinthe line-shaped auxiliary electrode is provided along an edge portion of the circuit substrate so as to at least partially surround the planar-shaped radiator in plan view;
the planar-shaped radiator and the line-shaped auxiliary electrode functions as an antenna; and
the loop-shaped electrode function as an impedance matching circuit for the planar-shaped radiator and the line-shaped auxiliary electrode to enhance the radiation gain and improve directional characteristics of the antenna.
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Abstract
A printed wiring board includes a circuit substrate on which sheets are laminated, a wireless IC element provided on the sheet, a radiator provided on the sheet, and a loop-shaped electrode defined by first planar conductors, via hole conductors, and one side of the radiator, coupled to the wireless IC element. The first planar conductors are coupled to the radiator and the second planar conductors by auxiliary electrodes.
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Citations
20 Claims
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1. A printed wiring board comprising:
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a wireless IC element configured to process a high-frequency signal; a circuit substrate including at least two stacked insulating sheets, wherein the wireless IC element is mounted; a loop-shaped electrode connected to the wireless IC element, mounted on one of the insulating sheets, and in or on and across the circuit substrate; a planar-shaped radiator mounted in or on another one of said insulating sheets and connected to the loop-shaped electrode; and a line-shaped auxiliary electrode mounted in or on said another one of said insulating sheets and connected to at least one of the loop-shaped electrode and the planar-shaped radiator;
whereinthe line-shaped auxiliary electrode is provided along an edge portion of the circuit substrate so as to at least partially surround the planar-shaped radiator in plan view; the planar-shaped radiator and the line-shaped auxiliary electrode functions as an antenna; and the loop-shaped electrode function as an impedance matching circuit for the planar-shaped radiator and the line-shaped auxiliary electrode to enhance the radiation gain and improve directional characteristics of the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification