WEARABLE DEVICE SAR REDUCTION AND ANTENNA IMPROVEMENT
A solution to the technical problem of improving antenna performance for wearable electronic devices includes increasing the distance between the antenna and the user's body. In the example of an electronic device implemented within eyeglasses, the antenna distance may be increased by locating the antenna on an outer rim of an eyeglasses lens. This increased distance between the antenna and the user's head decreases the SAR observed at the user's head. This increased distance also enables improved impedance matching and improved antenna return loss, which improves antenna receiver sensitivity and increases antenna transmission effectiveness.
1 . A radio frequency eyewear communication apparatus comprising:
a first eyewear lens;
a first eyewear temple;
a first eyewear hinge;
a first antenna disposed on a lateral rim of the first eyewear lens, the lateral rim proximate the first eyewear hinge;
a radio frequency connector disposed on the first eyewear temple; and
an impedance matching component disposed between the first antenna and the first radio frequency connector.
2 . The apparatus of claim 1 , further including a second antenna.
3 . The apparatus of claim 2 , wherein the second antenna is disposed on an opposing lateral rim of a second eyewear lens, the opposing lateral rim proximate a second eyewear hinge.
4 . The apparatus of claim 1 , wherein the antenna includes a monopole antenna, the monopole antenna including a conductive monopole element extending from the impedance matching component along the lateral rim of the eyewear lens.
5 . The apparatus of claim 4 , wherein:
the eyewear hinge is attached to an upper portion of the lateral rim of the eyewear lens; and
the conductive monopole element extends from the impedance matching component downward along the lateral rim of the eyewear lens.
6 . The apparatus of claim 4 , wherein:
the eyewear hinge is attached to a lower portion of the lateral rim of the eyewear lens; and
the conductive monopole element extends from the impedance matching component upward along the lateral rim of the eyewear lens.
7 . The apparatus of claim 1 , wherein:
the eyewear hinge is attached to a medial portion of the lateral rim of the eyewear lens; and
the antenna includes a dipole antenna, the dipole antenna including two conductive dipole elements extending from the impedance matching component in opposite directions on the lateral rim of the eyewear lens.
8 . The apparatus of claim 1 , further including a processor disposed on the eyewear temple.
9 . The apparatus of claim 8 , wherein the processor includes a system-on-a-chip.
10 . The apparatus of claim 1 , further including a power management integrated circuit disposed on the eyewear temple.
11 . The apparatus of claim 1 , wherein the eyewear includes at least one of eyeglasses, sunglasses, smart glasses, virtual reality display, protective goggles, and sport goggles.
12 . A radio frequency eyewear communication method comprising:
disposing a first antenna on a lateral rim of a first eyewear lens, the lateral rim proximate a first eyewear hinge;
disposing a radio frequency connector on a first eyewear temple; and
electrically connecting an impedance matching component between the first antenna and the radio frequency connector.
13 . The method of claim 12 , further including disposing a second antenna on a spatially disparate eyewear portion.
14 . The method of claim 13 , wherein the second antenna is disposed on an opposing lateral rim of a second eyewear lens, the opposing lateral rim proximate a second eyewear hinge.
15 . The method of claim 12 , further including disposing a processor on the eyewear temple.
16 . The method of claim 15 , wherein the processor includes a system-on-a-chip.
17 . The method of claim 12 , further including disposing a power management integrated circuit on the eyewear temple.
18 . The method of claim 12 , wherein the eyewear includes at least one of eyeglasses, sunglasses, smart glasses, virtual reality display, protective goggles, and sport goggles.
19 . At least one machine-readable storage medium, comprising a plurality of instructions that, responsive to being executed with processor circuitry of a computer-controlled device, cause the computer-controlled device to:
dispose a first antenna on a lateral rim of a first eyewear lens, the lateral rim proximate a first eyewear hinge;
dispose a radio frequency connector on a first eyewear temple; and
electrically connect an impedance matching component between the first antenna and the radio frequency connector.
20 . The machine-readable storage medium of claim 19 , the instructions further causing the computer-controlled device to dispose a second antenna on a spatially disparate eyewear portion.
21 . The machine-readable storage medium of claim 20 , wherein the second antenna is disposed on an opposing lateral rim of a second eyewear lens, the opposing lateral rim proximate a second eyewear hinge.
22 . The machine-readable storage medium of claim 19 , the instructions further causing the computer-controlled device to dispose a processor on the eyewear temple.
23 . The machine-readable storage medium of claim 22 , wherein the processor includes a system-on-a-chip.
24 . The machine-readable storage medium of claim 19 , the instructions further causing the computer-controlled device to dispose a power management integrated circuit on the eyewear temple.
25 . The machine-readable storage medium of claim 19 , wherein the eyewear includes at least one of eyeglasses, sunglasses, smart glasses, virtual reality display, protective goggles, and sport goggles.