Surface mount type antenna and radio transmitter and receiver using the same
First Claim
1. A surface mount type antenna comprising:
- a substrate;
at least one fed radiation electrode arranged to receive a signal sent from a signal source and provided on the substrate, wherein said at least one of the fed radiation electrode includes a fed end section side which receives a signal from the signal source and is arranged opposite another end side defining an open end, with a gap provided therebetween; and
at least one non-fed radiation electrode that is provided on the substrate and electromagnetically coupled with said at least one fed radiation electrode to generate a double-resonant state.
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Abstract
A surface mount type antenna includes a loop-shaped fed radiation electrode provided on a substrate, and a non-fed radiation electrode is arranged close to the fed radiation electrode with a gap provided therebetween. One end side of the non-fed radiation electrode is grounded, and the other end side is an open end. A signal is sent to the non-fed radiation electrode from the fed radiation electrode by electromagnetic coupling to perform a resonant operation. The fed radiation electrode and the non-fed radiation electrode generate a double-resonant state. The double resonance extends the frequency band. When the fed radiation electrode and the non-fed radiation electrode are provided on the substrate to define an antenna, the size of the antenna is greatly reduced.
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Citations
18 Claims
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1. A surface mount type antenna comprising:
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a substrate;
at least one fed radiation electrode arranged to receive a signal sent from a signal source and provided on the substrate, wherein said at least one of the fed radiation electrode includes a fed end section side which receives a signal from the signal source and is arranged opposite another end side defining an open end, with a gap provided therebetween; and
at least one non-fed radiation electrode that is provided on the substrate and electromagnetically coupled with said at least one fed radiation electrode to generate a double-resonant state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A surface mount type antenna comprising:
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a substrate;
a signal source;
at least one fed radiation electrode provided on said substrate and arranged to receive a signal sent from the signal source, said at least one of the fed radiation electrode includes a fed end section side which receives a signal from the signal source and an opposite open end with a gap provided therebetween; and
at least one non-fed radiation electrode that is provided on the substrate and electromagnetically coupled with said at least one fed radiation electrode to generate a double-resonant state. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification