CRLH antenna structures
A variety of configurations for a CRLH structured antenna in a wireless device are presented. An antenna having portions of the CRLH structure positioned on different layers provides an elevated structure. An antenna is presented having a double folded antenna structure, wherein a cell patch includes extensions on multiple layers of a substrate.
1. A wireless device, comprising:
a substrate;
a first portion of a radiating element patterned onto a first side of the substrate;
a second portion of the radiating element patterned onto a second side of the substrate, wherein the first and second portions are patterned as a continuous conductive element;
a feed line capacitively coupled to the radiating element; and
a via line coupled to the radiating element, the via line further coupled to a reference ground,
wherein the radiating element is positioned outside of a footprint of the reference ground.
2. The wireless device of claim 1 , further comprising a Composite Right and Left Handed (CRLH) metamaterial antenna structure,
wherein the first portion and the second portion of the radiating element form a continuous cell patch of the CRLH metamaterial antenna structure.
3. The wireless device of claim 2 , wherein the CRLH metamaterial antenna structure includes a unit cell, comprising:
the feed line;
the continuous cell patch; and
the via line.
4. The wireless device of claim 1 , comprising a meander line coupled to the feed line.
5. The wireless device of claim 1 , further comprising:
a component area,
wherein the first portion of the radiating element located on the first side of the substrate includes regions patterned proximate a first side of the component area and patterned proximate a second side of the component area, and
wherein the second portion of the radiating element located on the second side of the substrate includes a region patterned opposite the component area.
6. The wireless device of claim 5 , wherein the component area includes a microphone area.
7. The wireless device of claim 1 , wherein the feed line further comprises a launch pad capacitively coupled to the radiating element.
8. The wireless device of claim 1 , wherein the substrate is an FR-4 material.
9. The wireless device of claim 1 , wherein the substrate comprises a keypad connection area.
10. The wireless device of claim 1 , wherein the radiating element conforms to a shape of the substrate.
11. The wireless device of claim 1 , wherein the radiating element includes a portion arranged to fold around an edge of the substrate to provide the continuous conductive element.
12. The wireless device of claim 1 , wherein the feed line is patterned on the first surface of the substrate.
13. The wireless device of claim 1 , wherein the feed line is patterned on the second surface of the substrate.
14. A Composite Right and Left Handed (CRLH) metamaterial antenna device, comprising:
a substrate; and
a unit cell, including:
a first portion of a radiating element patterned onto a first side of the substrate;
a second portion of the radiating element patterned onto a second side of the substrate;
a third portion located on an edge of the substrate between the first and second sides of the substrate;
a feed line capacitively coupled to the radiating element; and
a via line coupled to the radiating element, the via line further coupled to a reference ground,
wherein the radiating element is positioned outside of a footprint of the reference ground, and
wherein the first, second, and third portions of the radiating element are arranged as a continuous conductive element to provide a continuous cell patch of the unit cell.
15. A method for providing an antenna structure, comprising:
forming a reference ground on a substrate;
forming a first portion of a radiating element on a first side of a substrate;
forming a second portion of the radiating element on a second side of the substrate;
forming a third portion located on an edge of the substrate between the first and second sides of the substrate;
forming a feed line capacitively coupled to the radiating element; and
forming a via line coupled to the radiating element, the via line further coupled to the reference ground,
wherein the radiating element is positioned outside of a footprint of the reference ground, and
wherein the first, second, and third portions of the radiating element are arranged as a continuous conductive element.
16. The method of claim 15 , wherein providing the antenna structure further comprises forming a Composite Right and Left Handed (CRLH) metamaterial antenna structure including a unit cell, the unit cell including the radiating element, the feed line, and the via line.
17. The method of claim 15 , further comprising forming a meander line coupled to the feed line.
18. The method of claim 15 , further comprising forming a component area on the substrate,
wherein the first portion of the radiating element located on the first side of the substrate includes regions formed proximate a first side of the component area and formed proximate a second side of the component area, and
wherein the second portion of the radiating element located on the second side of the substrate includes a region formed opposite the component area.
19. The method of claim 15 , wherein forming the feed line further comprises forming a launch pad capacitively coupled to the radiating element.
20. The method of claim 15 , wherein forming the radiating element further comprises conforming the radiating element to a shape of the substrate.