Metamaterial antenna device with mechanical connection
A wireless device incorporating an antenna made of Composite Right Left Hand (CRLH) structures, having a connection element coupling a portion of the antenna to a ground electrode. In some embodiments a wireless device has one or more mechanical connection units made of electrically conductive materials to provide both mechanical engagement and electrical conduction for the antenna devices.
1. An antenna device comprising:
a substrate structure comprising one or more metallization layers structured to include:
a first ground electrode which is formed in one of the one or more metallization layers;
and
a plurality of electrically conductive parts formed in at least one of the one or more metallization layers for transmitting and receiving an antenna signal, the plurality of conductive parts including:
a cell patch;
a feed structure coupled to the cell patch using a capacitive coupling; and
one or more connecting units, each mechanically engaging parts of the substrate structure and electrically coupling the first ground electrode to a second ground electrode comprising an assembly separate from the substrate comprising the one or more metallization layers;
wherein the plurality of electrically conductive parts and at least part of the substrate structure are configured to form a composite left and right handed (CRLH) antenna structure that exhibits a plurality of frequency resonances associated with the antenna signal.
2. The antenna device as in claim 1 the antenna device further comprising:
a conductive element coupling the cell patch to the first ground electrode, wherein the conductive element forms an inductive loading to the cell patch, and wherein at least one connecting unit is coupled to the conductive element.
3. The antenna device as in claim 2 , wherein the feed structure comprises a launch pad proximate the cell patch.
4. The antenna device as in claim 2 , wherein the capacitive coupling between the feed structure and the cell patch forms a Left Hand (LH) capacitance.
5. The antenna device as in claim 4 , wherein the inductive loading forms a LH inductance.
6. The antenna device as in claim 5 , wherein the antenna device is structured to support a first resonant frequency and the LH capacitance and inductance are each structured to support a second resonant frequency.
7. The antenna device as in claim 6 , wherein the first resonant frequency is a higher frequency than the second resonant frequency.
8. The antenna device as in claim 1 , wherein the connecting unit is a screw made of a conductive material.
9. The antenna device as in claim 1 , wherein the connecting unit is to couple to a wireless device housing.
10. The antenna device as in claim 1 , wherein the cell patch is located on a first metallization layer, and
wherein the first ground electrode is located on the first metallization layer.
11. A wireless device, comprising:
a ground electrode;
an antenna element configured to provide a Composite Right Left Hand (CRLH) based structure, the antenna element including:
a substrate comprising one or more metallization layers including:
a cell patch; and
a feed structure capacitively coupled to the cell patch; and
a connection element providing mechanical connection of portions of the wireless device, the connection element coupling the antenna element to the ground electrode,
wherein the ground electrode is separate from the substrate comprising the one or more metallization layers; and
wherein the antenna element is configured to provide a plurality of specified resonances using the CRLH based structure.
12. The wireless device as in claim 11 , wherein the antenna element comprises
an inductive load coupled between the cell patch and the ground electrode, wherein the connection element couples the inductive load to the ground electrode.
13. The wireless device as in claim 12 , wherein the one or more metallization layers include an antenna ground coupled to the inductive load.
14. The wireless device as in claim 13 , comprising a second connection element providing mechanical connection of the portions of the wireless device, the second connection element coupling the antenna element to the ground electrode.
15. The wireless device as in claim 11 , comprising an antenna ground included as a portion of the one or more metallization layers,
wherein the cell patch is located on a first metallization layer, and
wherein the antenna ground is located on the first metallization layer.
16. A method for forming a wireless device, comprising forming an antenna element on a substrate, the antenna element configured to provide a Composite Right Left Hand (CRLH) based structure, including:
forming one or more metallization layers included as a portion of a substrate, the one or more metallization layers including:
a cell patch; and
a feed structure capacitively coupled to the cell patch; and
forming a connection element providing mechanical connection of portions of the wireless device, the connection element coupling the antenna element to a ground electrode,
wherein the ground electrode is separate from the substrate comprising the one or more metallization layers, and
wherein the antenna element is configured to provide a plurality of specified resonances using the CRLH based structure.
17. The method as in claim 16 , further comprising:
forming an inductive load coupled between the cell patch and the ground electrode,
wherein the connection element couples the inductive load to the ground electrode.
18. The method as in claim 17 , wherein the substrate is made of a dielectric material.
19. The method as in claim 16 , wherein the connection element is a screw.
20. The method as in claim 16 , wherein the connection element is a C-clip.