Wideband coplanar waveguide fed monopole applique antennas
A thin, flexible antenna that has particular application to be mounted to a dielectric structure on a vehicle, such as vehicle glass, where the antenna has a wideband antenna geometry for various communications applications, and where the conductive portion of the antenna can employ transparent conductors.
1. An antenna structure comprising: a dielectric substrate;
a thin film substrate adhered to the dielectric structure by an adhesive layer;
a planar antenna conductor formed to the substrate opposite to the adhesive layer;
a feed structure positioned in the same plane as the antenna conductor and being electrically coupled thereto, wherein the feed structure is a co-planar waveguide (CPW) structure; and
wherein the CPW structure includes opposing ground planes defining a gap therebetween, a signal line positioned within the gap and a feed conductor electrically coupling the ground planes at a connector region to provide for installation of at least one of a surface mount connector, a direct mount of a pigtail, and a coaxial cable, said antenna conductor being electrically coupled to the signal line; the feed structure including the conductor and the connector are all in the same plane.
2. The antenna structure according to claim 1 wherein the antenna conductor has a pentagon shape where a tip of the antenna conductor is coupled to the signal line.
3. The antenna structure according to claim 1 further comprising a connector, a pig-tail or a coaxial cable electrically coupled to the feed structure.
4. The antenna structure according to claim 1 wherein the dielectric structure is a vehicle window.
5. The antenna structure according to claim 4 wherein the vehicle window is a vehicle windshield.
6. The antenna structure according to claim 5 wherein the thin film substrate is secured to an outer surface of an outer glass layer, an inner surface of the outer glass layer, an outer surface of an inner glass layer, an inner surface of the inner glass layer, or a surface of a polyvinyl butyral (PVB) layer.
7. The antenna structure according to claim 1 wherein the antenna conductor is a transparent conductor.
8. The antenna structure according to claim 1 wherein the thin film substrate is a mylar substrate.
9. The antenna structure according to claim 1 wherein the adhesive layer is a transfer tape.
10. The antenna structure according to claim 1 wherein the adhesive layer is transparent.
11. The antenna structure according to claim 1 further comprising a passivation layer provided over the antenna conductor.
12. The antenna structure according to claim 1 wherein the antenna structure operates in a frequency band for a dedicated short range communications (DSRC) system, a GPS system, or a long term evolution (LTE) cellular system.
13. An antenna structure comprising: a vehicle window;
a thin film substrate adhered to the vehicle window by an adhesive layer;
a transparent planar antenna conductor formed to the substrate opposite to the adhesive layer; and
a co-planar waveguide (CPW) feed structure positioned in the same plane as the antenna conductor and being electrically coupled thereto, wherein the CPW feed structure includes opposing ground planes defining a gap therebetween, a signal line positioned within the gap and a feed conductor electrically coupling the ground planes at a connector region to provide for installation of at least one of a surface mount connector, a direct mount of a pigtail, and a coaxial cable, said antenna conductor being electrically coupled to the signal line, said antenna conductor being electrically coupled to the signal line; the feed structure including the conductor and the connector are all in the same plane.
14. The antenna structure according to claim 13 wherein the antenna conductor has a pentagon shape where a tip of the antenna conductor is coupled to the signal line.
15. The antenna structure according to claim 13 wherein the vehicle window is a vehicle windshield, and wherein the thin film substrate is secured to an outer surface of an outer glass layer, an inner surface of the outer glass layer, an outer surface of an inner glass layer, an inner surface of the inner glass layer, or a surface of a polyvinyl butyral (PVB) layer.
16. An antenna structure configured to operate in a frequency band for a dedicated short range communications (DSRC) system, a GPS system, or a long term evolution (LTE) cellular system, said antenna structure comprising:
a vehicle windshield;
a thin film substrate adhered to the vehicle windshield by an adhesive layer, wherein the thin film substrate is secured to an outer surface of an outer glass layer, an inner surface of the outer glass layer, an outer surface of an inner glass layer, an inner surface of the inner glass layer, or a surface of a polyvinyl butyral (PVB) layer;
a transparent planar antenna conductor formed to the substrate opposite to the adhesive layer; and
a co-planar waveguide (CPW) feed structure positioned in the same plane as the antenna conductor and being electrically coupled thereto, wherein the CPW feed structure includes opposing ground planes defining a gap therebetween, a signal line positioned within the gap and a feed conductor electrically coupling the ground planes at a connector region to provide for installation of at least one of a surface mount connector, a direct mount of a pigtail, and a coaxial cable, said antenna conductor being electrically coupled to the signal line, said antenna conductor being electrically coupled to the signal line, the feed structure including the conductor and the connector are all in the same plane.
17. The antenna structure according to claim 16 wherein the antenna conductor has a pentagon shape where a tip of the antenna conductor is coupled to the signal line.