Wearable device and communication method
A wearable device includes a flexible wearable layer and a detachable layer. The flexible wearable layer includes a fabric element and a first metal resonant structure. The first metal resonant structure is integrated with the fabric element. The detachable layer is adjacent to the flexible wearable layer. The detachable layer includes a dielectric substrate and a second metal resonant structure. The dielectric substrate has a first surface and a second surface which are opposite to each other. The second metal resonant structure is distributed over the first surface and the second surface of the dielectric substrate. When the wearable device receives an RF (Radio Frequency) signal, the flexible wearable layer guides the RF signal to the detachable layer.
1 . A wearable device, comprising:
a flexible wearable layer, comprising:
a fabric element; and
a first metal resonant structure, integrated with the fabric element; and
a detachable layer, disposed adjacent to the flexible wearable layer, and comprising:
a dielectric substrate, having a first surface and a second surface opposite to each other; and
a second metal resonant structure, distributed over the first surface and the second surface of the dielectric substrate;
wherein when the wearable device receives an RF (Radio Frequency) signal, the flexible wearable layer guides the RF signal to the detachable layer.
2 . The wearable device as claimed in claim 1 , wherein the flexible wearable layer causes a Mie scattering event of the RF signal, and a main transmission direction of the Mie scattering event is toward the detachable layer.
3 . The wearable device as claimed in claim 1 , wherein the wearable device covers an operational frequency band from 2.4 GHz to 100 GHz, and a frequency of the RF signal is within the operational frequency band.
4 . The wearable device as claimed in claim 3 , wherein the first metal resonant structure comprises:
a plurality of first metal units, distributed over the fabric element, wherein the first metal units are independent of each other.
5 . The wearable device as claimed in claim 4 , wherein a length of each of the first metal units is from 0.1 to 1 wavelength of the operational frequency band.
6 . The wearable device as claimed in claim 4 , wherein a distance between any adjacent two of the first metal units is shorter than or equal to 0.1 wavelength of the operational frequency band.
7 . The wearable device as claimed in claim 3 , wherein a distance between the flexible wearable layer and the detachable layer is shorter than or equal to 0.5 wavelength of the operational frequency band.
8 . The wearable device as claimed in claim 3 , wherein the second metal resonant structure comprises:
a plurality of second metal units, disposed on the first surface and the second surface of the dielectric substrate, wherein the second metal units are independent of each other.
9 . The wearable device as claimed in claim 8 , wherein the second metal units are inductive elements.
10 . The wearable device as claimed in claim 8 , wherein a length of each of the second metal units is shorter than or equal to 0.5 wavelength of the operational frequency band.
11 . The wearable device as claimed in claim 8 , wherein a distance between any adjacent two of the second metal units is shorter than or equal to 0.1 wavelength of the operational frequency band.
12 . The wearable device as claimed in claim 1 , wherein the dielectric substrate is implemented with a bulletproof plate.
13 . A communication method, comprising the steps of:
providing a flexible wearable layer, wherein the flexible wearable layer comprises a fabric element and a first metal resonant structure, and the first metal resonant structure is integrated with the fabric element;
providing a detachable layer adjacent to the flexible wearable layer, wherein the detachable layer comprises a dielectric substrate and a second metal resonant structure, the dielectric substrate has a first surface and a second surface opposite to each other, and the second metal resonant structure is distributed over the first surface and the second surface of the dielectric substrate; and
when an RF signal is received, guiding the RF signal to the detachable layer by the flexible wearable layer.
14 . The communication method as claimed in claim 13 , further comprising:
causing a Mie scattering event of the RF signal by the flexible wearable layer, wherein a main transmission direction of the Mie scattering event is toward the detachable layer.
15 . The communication method as claimed in claim 13 , wherein a frequency of the RF signal is within an operational frequency band from 2.4 GHz to 100 GHz.
16 . The communication method as claimed in claim 15 , wherein a length of each of a plurality of first metal units of the first metal resonant structure is from 0.1 to 1 wavelength of the operational frequency band.
17 . The communication method as claimed in claim 15 , wherein a distance between any adjacent two of a plurality of first metal units of the first metal resonant structure is shorter than or equal to 0.1 wavelength of the operational frequency band.
18 . The communication method as claimed in claim 15 , wherein a distance between the flexible wearable layer and the detachable layer is shorter than or equal to 0.5 wavelength of the operational frequency band.
19 . The communication method as claimed in claim 15 , wherein a length of each of a plurality of second metal units of the second metal resonant structure is shorter than or equal to 0.5 wavelength of the operational frequency band.
20 . The communication method as claimed in claim 15 , wherein a distance between any adjacent two of a plurality of second metal units of the second metal resonant structure is shorter than or equal to 0.1 wavelength of the operational frequency band.