Antenna device, radio device, and electronic instrument
View Patent ↗An antenna apparatus 1 has an antenna substrate 21 composed of a separator 23 and electrolyte layers 24 a and 24 b disposed on both surfaces of the separator 23 ; an antenna pattern 22 a disposed on the solid electrolyte layer 24 a ; and an antenna pattern 22 b disposed on the solid electrolyte layer 24 b . The antenna patterns 22 a and 22 b are made of an electroconductive plastic. When a DC voltage is applied between the antenna patterns 22 a and 22 b , ions can be doped to one of the antenna patterns 22 a and 22 b , whereas ions can be undoped form the other of the antenna patterns 22 a and 22 b . In other words, one of the antenna patterns 22 a and 22 b can become a conductor, whereas the other thereof can become an insulator.
1. An antenna apparatus, comprising:
a substrate; and
a plurality of antenna patterns disposed on the substrate,
wherein the antenna patterns being made of an electroconductive plastic, the electroconductive plastic (i) transforming to an electroconductive resin when doped with ions and (ii) transforming to an insulative resin when dedoped, and
wherein the substrate is made of a solid electrolyte including ions used to dope the electroconductive plastic.
2. The antenna apparatus as set forth in claim 1 ,
wherein the substrate includes an insulative separator,
wherein solid electrolyte layers made of the solid electrolyte are disposed on both surfaces of the separator.
3. The antenna apparatus as set forth in claim 1 ,
wherein the plurality of antenna patterns correspond to different frequency bands.
4. The antenna apparatus as set forth in claim 1 ,
wherein the plurality of antenna patterns are linear patterns.
5. The antenna apparatus as set forth in claim 1 ,
wherein the substrate is a planar substrate.
6. The antenna apparatus as set forth in claim 5 ,
wherein the plurality of antenna patterns are disposed on both principal surfaces of the substrate.
7. The antenna apparatus as set forth in claim 5 ,
wherein the plurality of antenna patterns are disposed on one principal surface of the substrate.
8. The antenna apparatus as set forth in claim 7 , further comprising:
a base plate made of a metal and disposed on the other principal surface of the substrate.
9. The antenna apparatus as set forth in claim 8 , wherein the plurality of antenna patterns are planner patterns.
10. A wireless apparatus that is connected to a device and that allows it to additionally have a wireless function, the wireless apparatus comprising:
a substrate;
a plurality of antenna patterns disposed on the substrate; and
switches configured to select the plurality of antenna patterns so that one of the plurality of antenna patterns has one potential and the other of the plurality of antenna patterns has another potential when a DC voltage is applied between the plurality of antenna patterns;
wherein the antenna patterns are made of an electroconductive plastic, the electroconductive plastic (i) transforming to an electroconductive resin when doped with ions and (ii) transforming to an insulative resin when dedoped, and
wherein the substrate is made of a solid electrolyte including ions used to dope the electroconductive plastic.
11. The wireless apparatus as set forth in claim 10 ,
wherein the substrate includes an insulative separator, and
wherein solid electrolyte layers made of the solid electrolyte are disposed on both surfaces of the separator.
12. The wireless apparatus as set forth in claim 10 ,
wherein the plurality of antenna patterns correspond to different frequency bands.
13. The wireless apparatus as set forth in claim 10 ,
wherein the plurality of antenna patterns are linear patterns.
14. The wireless apparatus as set forth in claim 10 ,
wherein the substrate is a planar substrate.
15. The wireless apparatus as set forth in claim 14 ,
wherein the plurality of antenna patterns are disposed on both principal surfaces of the substrate.
16. The wireless apparatus as set forth in claim 14 ,
wherein the plurality of antenna patterns are disposed on one principal surface of the substrate.
17. The wireless apparatus as set forth in claim 16 , further comprising:
a base plate made of a metal and disposed on the other principal surface of the substrate.
18. The wireless apparatus as set forth in claim 17 ,
wherein the plurality of antenna patterns are planner patterns.
19. An electronic apparatus having a wireless communication function that transmits and receives information, the electronic apparatus comprising:
a substrate;
a plurality of antenna patterns disposed on the substrate;
a voltage source that applies a DC voltage between the plurality of antenna patterns; and
switches configured to select the plurality of antenna patterns so that one of the plurality of antenna patterns has one potential and the other of the plurality of antenna patterns has another potential when the DC voltage is applied between the plurality of antenna patterns,
wherein the antenna patterns are made of an electroconductive plastic, the electroconductive plastic (i) transforming to an electroconductive resin when doped with ions and (ii) transforming to an insulative resin when dedoped, and
wherein the substrate is made of a solid electrolyte including ions used to dope the electroconductive plastic.
20. The electronic apparatus as set forth in claim 19 ,
wherein the substrate includes an insulative separator,
wherein solid electrolyte layers made of the solid electrolyte are disposed on both surfaces of the separator.
21. The electronic apparatus as set forth in claim 19 ,
wherein the plurality of antenna patterns correspond to different frequency bands.
22. The electronic apparatus as set forth in claim 19 ,
wherein the plurality of antenna patterns are linear patterns.
23. The electronic apparatus as set forth in claim 19 ,
wherein the substrate is a planar substrate.
24. The electronic apparatus as set forth in claim 23 ,
wherein the plurality of antenna patterns are disposed on both principal surfaces of the substrate.
25. The electronic apparatus as set forth in claim 23 ,
wherein the plurality of antenna patterns are disposed on one principal surface of the substrate.
26. The electronic apparatus as set forth in claim 25 , further comprising:
a base plate made of a metal and disposed on the other principal surface of the substrate.
27. The electronic apparatus as set forth in claim 26 ,
wherein the plurality of antenna patterns are planner patterns.