Antenna device, radio device, and electronic instrument
View Patent ↗An antenna apparatus 2 has a separator 23 ; solid electrolytic layers 24 a and 24 b disposed on both sides of the separator 23 ; and linear antennas 22 a and 22 b disposed on the solid electrolyte layers 24 a and 24 b , respectively, and made of an electroconductive polymer. 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 and ions can be undoped from the other. In other words, one of the antenna patterns 22 a and 22 b can become a conductor, whereas the other can become an insulator.
1. An antenna apparatus, comprising:
a substrate made of an insulator layer inserted in an electrolyte; and
a plurality of antenna patterns disposed on the substrate and insulated from each other, and each of the plurality of antenna patterns is made of an electroconductive plastic and is configured to transmit and/or receive polarized waves that are orthogonal to each other,
wherein one of the plurality of antenna patterns is doped with ions from the electrolyte and is configured to function as an antenna when a DC voltage is applied between said plurality of antenna patterns.
2. The antenna apparatus as set forth in claim 1 ,
wherein the substrate has a planer shape, and
wherein the plurality of antennas are disposed on both principal surfaces of the substrate.
3. The antenna apparatus as set forth in claim 2 ,
wherein the plurality of antennas are disposed so that the substrate is interposed therebetween.
4. The antenna apparatus as set forth in claim 1 ,
wherein the antenna patterns are linear antennas.
5. The antenna apparatus as set forth in claim 4 ,
wherein the linear antennas are Zepp antennas.
6. The antenna apparatus as set forth in claim 1 ,
wherein the plurality of antenna patterns are at least one linear antenna and at least one slot antenna.
7. The antenna apparatus as set forth in claim 6 ,
wherein the linear antenna is a Zepp antenna.
8. The antenna apparatus as set forth in claim 6 ,
wherein the linear antenna is disposed in a slot of the slot antenna.
9. The antenna apparatus as set forth in claim 1 ,
wherein the plurality of antenna patterns are two linear antennas and one slot antenna.
10. An wireless apparatus that is connected to a main body of a device and that additionally provides a wireless function to the device, the wireless apparatus comprising:
a substrate made of an insulator layer inserted in an electrolyte;
a plurality of antenna patterns disposed on the substrate and insulated from each other, and each of the plurality of antenna patterns is made of an electroconductive plastic and is configured to transmit and/or receive polarized waves that are orthogonal to each other; and
a switch that is configured to select two groups from the plurality of antenna patterns so that the first group has one potential and the second group has another potential with a DC voltage applied between the plurality of antenna patterns,
wherein the first group is doped with ions from the electrolyte and is configured to function as an antenna when the DC voltage is applied between said plurality of antenna patterns.
11. The wireless apparatus as set forth in claim 10 ,
wherein the substrate has a planer shape, and
wherein the plurality of antennas are disposed on both principal surfaces of the substrate.
12. The wireless apparatus as set forth in claim 11 ,
wherein the plurality of antennas are disposed so that the substrate is interposed therebetween.
13. The wireless apparatus as set forth in claim 10 ,
wherein the antenna patterns are linear antennas.
14. The wireless apparatus as set forth in claim 13 ,
wherein the linear antennas are Zepp antennas.
15. The wireless apparatus as set forth in claim 10 ,
wherein the plurality of antenna patterns are at least one linear antenna and at least one slot antenna.
16. The wireless apparatus as set forth in claim 15 ,
wherein the linear antenna is a Zepp antenna.
17. The wireless apparatus as set forth in claim 15 ,
wherein the linear antenna is disposed in a slot of the slot antenna.
18. The wireless apparatus as set forth in claim 10 ,
wherein the plurality of antenna patterns are two linear antennas and one slot antenna.
19. An electronic apparatus that has a wireless communication function that transmits and receives information, the electronic apparatus comprising:
a substrate made of an insulator layer inserted in an electrolyte;
a plurality of antenna patterns disposed on the substrate and insulated from each other, and each of the plurality of antenna patterns is made of an electroconductive plastic and is configured to transmit and/or receive polarized waves that are orthogonal to each other;
a voltage source that is configured to apply a DC voltage between the plurality of antenna patterns; and
a switch that is configured to select two groups from the plurality of antenna patterns so that the first group has one potential and the second group has another potential with the DC voltage applied between the plurality of antenna patterns,
wherein the first group is doped with ions from the electrolyte and is configured to function as an antenna when the DC voltage is applied between said plurality of antenna groups.
20. The electronic apparatus as set forth in claim 19 ,
wherein the substrate has a planer shape, and
wherein the plurality of antennas are disposed on both principal surfaces of the substrate.
21. The electronic apparatus as set forth in claim 20 ,
wherein the plurality of antennas are disposed so that the substrate is interposed therebetween.
22. The electronic apparatus as set forth in claim 19 ,
wherein the antenna patterns are linear antennas.
23. The electronic apparatus as set forth in claim 22 ,
wherein the linear antennas are Zepp antennas.
24. The electronic apparatus as set forth in claim 19 ,
wherein the plurality of antenna patterns are at least one linear antenna and at least one slot antenna.
25. The electronic apparatus as set forth in claim 24 ,
wherein the linear antenna is a Zepp antenna.
26. The electronic apparatus as set forth in claim 24 ,
wherein the linear antenna is disposed in a slot of the slot antenna.
27. The electronic apparatus as set forth in claim 19 ,
wherein the plurality of antenna patterns are two linear antennas and one slot antenna.