Antenna apparatus and communication system
An antenna includes a first body having an array of resonators; a spacer adjacent to the first body, and a second body adjacent to the spacer such that the spacer is between the first and second bodies. The first body can be configured as an artificial metasurface ground plane and the second body can be configured as a monopole.
1. An antenna for a communication device comprising:
a first body;
a spacer adjacent to the first body;
a second body adjacent to the spacer such that the spacer is between the first and second bodies, the second body configured as a monopole, the second body having a perimeter that is smaller than a perimeter of the first body;
the first body configured as an artificial metasurface ground plane (AMSGP) having resonators backed by a metallic sheet, the metallic sheet configured as the ground plane of the AMSGP, the AMSGP configured as a primary radiator that operates as a slot array with amplitude tapering.
2. The antenna of claim 1 wherein the AMSGP is configured to reflect and radiate while simultaneously isolating the antenna from an animal body to which the antenna is attachable such that radiation to be emitted from the antenna is substantially directed away from the metallic sheet of the antenna and away from the animal body.
3. The antenna of claim 2 wherein the resonators are I-shaped resonators.
4. The antenna of claim 1 wherein the first body is flexible.
5. The antenna of claim 1 wherein the second body is flexible.
6. The antenna of claim 1 wherein the first body and second body are both planar structures.
7. The antenna of claim 1 wherein a first side of the first body is attached to the spacer and a first side of the second body is attached to the spacer.
8. The antenna of claim 7 wherein the spacer has a first side and a second side opposite the first side and wherein the first side of the first body is attached to the first side of the spacer and the first side of the second body is attached to the second side of the spacer.
9. The antenna of claim 8 wherein the spacer is a foam spacer and the first side of the first body is spaced apart from the first side of the second body by at least 0.1 mm and a plurality of vias are embedded in the first body to electrically connect an artificial metasurface of the AMSGP to the metallic sheet of the AMSGP.
10. A communication system comprising:
a communication management device communicatively connectable to at least one communication device;
wherein each of the at least one communication device is comprised of:
a processor communicatively connected to non-transitory memory;
an antenna communicatively connected to the processor for establishing a radio frequency link to the communication management device, the antenna comprising:
a first body;
a spacer adjacent to the first body;
a second body adjacent to the spacer such that the spacer is between the first and second bodies, the second body configured as a monopole, the second body having a perimeter that is smaller than a perimeter of the first body;
the first body configured as an artificial metasurface ground plane (AMSGP) having resonators backed by a metallic sheet, the metallic sheet configured as the ground plane of the AMSGP, the AMSGP configured as a primary radiator that operates as a slot array with amplitude tapering.
11. The communication system of claim 10 wherein the communication management device is a server, a workstation, a desktop computer, an access point, or a base station.
12. The communication system of claim 10 wherein the communication management device is comprised of a processor communicatively connected to non-transitory memory and a wireless transceiver unit for forming the radio frequency link with the antenna of the communication device.
13. The communication system of claim 10 wherein the communication system is within a healthcare facility and the radio frequency link is within a frequency band of between 2360-2400 MHz.
14. The communication system of claim 10 wherein the antenna establishes or maintains the radio frequency link with the communication management device when the communication device is worn by an animal.
15. The communication system of claim 14 wherein the animal is a human.
16. The communication system of claim 10 wherein the spacer is a foam spacer.
17. The communication system of claim 10 wherein the first body is spaced apart from the second body by at least 0.1 mm.
18. The communication system of claim 17 wherein a first side of the first body is attached to the spacer and a first side of the second body is attached to the spacer.
19. The communication system of claim 18 wherein the spacer has a first side and a second side opposite the first side and wherein the first side of the first body is directly attached to the first side of the spacer and the first side of the second body is directly attached to the second side of the spacer; and
wherein the spacer is sized and configured such that the first side of the first body is spaced apart from the first side of the second body by at least 0.1 mm.
20. The communication system of claim 19 wherein the AMSGP is configured to reflect and radiate while simultaneously isolating an animal body to which the antenna is attachable from the antenna.