Antenna for efficient body wearable applications
Embodiments relate generally to a body wearable antenna configuration comprising of a flexible multi-layered structure. Each layer has a property that contributes to the overall response of the antenna. The properties of each layer optimized to give the best overall response of the antenna.
1. A body wearable antenna configuration having a flexible multi-layered structure, each layer having a property contributing to the overall response of the antenna, the flexible multi-layered structure comprising:
a flexible protective layer;
a flexible radiation layer positioned below the flexible protective layer, wherein the radiation layer comprises,
a radiator; and
a feed; and
a spacer layer comprising a flexible material having a dielectric constant ranging from approximately 1 to approximately 10, and a loss tangent less than approximately 0.1, contacting the flexible radiation layer and a surrounding environment, wherein at least one of the dielectric constant, loss tangent, and size of the spacer layer is selected to minimize the concentration of electric fields below the spacer layer.
2. The body wearable antenna configuration of claim 1 further comprising:
a user isolation layer contacting the spacer layer to the surrounding environment wherein the user isolation layer is configured to isolate an interaction of electric fields from a user or the surrounding environment.
3. The body wearable antenna configuration of claim 2 , wherein the user isolation layer is implemented with an artificial magnetic conductor structure.
4. The body wearable antenna configuration of claim 1 , wherein the protective layer is configured to protect the antenna from the surroundings and environment and wherein the protective layer is constructed of at least one of cloth fabrics, textiles, or laminates.
5. The body wearable antenna configuration of claim 1 , wherein the radiator and feed are constructed in a single plane.
6. The body wearable antenna configuration of claim 5 , wherein the radiator is one of a narrowband or a wideband and implemented as one of a meander line monopole or a bow tie slot radiator.
7. The body wearable antenna configuration of claim 1 , wherein the radiator and feed enable a multi-layer radiator.
8. The body wearable antenna configuration of claim 7 , wherein the radiator is one of a narrowband or a wideband and implemented as one of a microstrip patch.
9. The body wearable antenna configuration of claim 1 , wherein the feed is implemented as one of a co-planar waveguide transmission line, and a co-planar strip line.
10. The body wearable antenna configuration according to claim 1 , wherein the radiator and feed enables an efficient multi-layer feed network as one of a microstrip line and a coaxial cable.
11. The body wearable antenna configuration of claim 1 , wherein the spacer layer is configured to provide sufficient separation between the radiation layer and the user to reduce the impact of external factors that impact on the performance of the antenna.
12. The body wearable antenna configuration according to claim 1 , wherein the spacer layer comprises at least one material having a dielectric constant less than a dielectric constant of the radiation layer.