Ceramic SMT chip antennas for UWB operation, methods of operation and kits therefor
Disclosed are devices, systems and methods regarding ceramic-substrate ultra-wideband (UWB) antennas that utilize surface-mount technology (SMT) for installation, integration and connection to external devices, electronics and systems. Numerous configurations are disclosed for elements comprising each antenna. This ensures that the disclosed antennas may be configured in design to address varying performance requirements as well as to optimize performance across portions of the UWB spectrum.
1. An ultra-wideband antenna comprising:
a ceramic dielectric substrate having a substrate length, a substrate width and a substrate thickness, a first surface, a second surface, and a third surface, a fourth surface, a fifth surface, and a sixth surface, the ceramic dielectric substrate further comprising a first edge defined by an intersection of the first surface and the third surface;
a radiator positioned on at least a portion of the first surface of the ceramic dielectric substrate, wherein the radiator comprises a semi-circular radiator, the semi-circular radiator having a curved side facing the first edge of the ceramic dielectric substrate, the semi-circular radiator further comprising a chord line that is parallel with the first edge, the chord line having a length which is less than the substrate width, the chord line length also being less than a diameter dimension for the semi-circular radiator; and
a feed positioned on the third surface of the ceramic dielectric substrate.
2. The ultra-wideband antenna of claim 1 wherein the ultra-wideband antenna operates within a range of frequencies from 3.1 GHz to 10 GHz.
3. The ultra-wideband antenna of claim 1 wherein the first surface of the ceramic dielectric substrate has a two-dimensional shape selected from square, rectangular, and parallelogram.
4. The ultra-wideband antenna of claim 1 wherein the first surface of the ceramic dielectric substrate is at least one of planar and substantially planar.
5. The ultra-wideband antenna of claim 1 wherein the feed is centered on the third surface of the ceramic dielectric substrate and occupies an entire substrate thickness and less than one-third of the substrate width or the substrate length.
6. The ultra-wideband antenna of claim 1 wherein the feed has a shape selected from circular, semi-circular, triangular, trapezoidal, square and rectangular.
7. The ultra-wideband antenna of claim 1 wherein the feed is centered on a bottom surface along a length and adjacent to an edge shared with one of the third surface, the fourth surface, the fifth surface, and the sixth surface.
8. The ultra-wideband antenna of claim 1 wherein the antenna is positioned on a substrate in electrical communication with a feed line.
9. The ultra-wideband antenna of claim 8 wherein feed line is in electrical communication with a connector.
10. The ultra-wideband antenna of claim 1 further comprising a first connection pad and a second connection pad positioned on the second surface of the ceramic dielectric substrate wherein the first connection pad is positioned adjacent a first side of the feed and the second connection pad is positioned adjacent a second side of the feed opposite the first connection pad.
11. The ultra-wideband antenna of claim 10 further comprising a third connection pad positioned on the second surface of the ceramic dielectric substrate.
12. An ultra-wideband antenna system comprising:
an ultra-wideband antenna comprising:
a ceramic dielectric substrate having a substrate length, a substrate width and a substrate thickness, a first surface, a second surface, a third surface, a fourth surface, a fifth surface, and a sixth surface, the ceramic dielectric substrate further comprising a first edge defined by an intersection of the first surface and the third surface;
a radiator positioned on at least a portion of the first surface of the ceramic dielectric substrate, wherein the radiator comprises a semi-circular radiator, the semi-circular radiator having a curved side facing the first edge of the ceramic dielectric substrate, the semi-circular radiator further comprising a chord line that is parallel with the first edge, the chord line having a length which is less than the substrate width, the chord line length also being less than a diameter dimension for the semi-circular radiator;
a feed positioned on the third surface of the ceramic dielectric substrate; and
a ground plane having a feed line in electrical communication with the ultra-wideband antenna.
13. The ultra-wideband antenna system of claim 12 further comprising one or more ground plane fingers.
14. The ultra-wideband antenna system of claim 12 further comprising a coaxial RF connector.
15. The ultra-wideband antenna system of claim 12 wherein the feed line terminates on the ground plane within a perimeter of the feed of the antenna.
16. The ultra-wideband antenna system of claim 12 further comprising two metallic elements positioned either side of the feed line on the ground plane separated by gaps which form a coplanar waveguide.
17. The ultra-wideband antenna system of claim 12 wherein the antenna transmits a large amount of digital data over a wide spectrum of frequency bands spanning more than 500 MHz at a low power for short distances.
18. The ultra-wideband antenna system of claim 12 wherein the antenna covers UWB band 1 through UWB band 10 simultaneously.
19. The ultra-wideband antenna system of claim 12 wherein the ultra-wideband antenna further comprises a first connection pad and a second connection pad positioned on the second surface of the ceramic dielectric substrate wherein the first connection pad is positioned adjacent a first side of the feed and the second connection pad is positioned adjacent a second side of the feed opposite the first connection pad.
20. The ultra-wideband antenna system of claim 19 wherein the ultra-wideband antenna further comprises a third connection pad positioned on the second surface of the ceramic dielectric substrate.
21. An ultra-wideband antenna method comprising the steps of:
providing an ultra-wideband antenna comprising a ceramic dielectric substrate having a substrate length, a substrate width and a substrate thickness, a first surface, a second surface, a third surface, a fourth surface, a fifth surface, and a sixth surface, the ceramic dielectric substrate further comprising a first edge defined by an intersection of the first surface and the third surface, a semi-circular radiator positioned on at least a portion of the first surface of the ceramic dielectric substrate, the semi-circular radiator having a curved side facing the first edge of the ceramic dielectric substrate, the semi-circular radiator further comprising a chord line that is parallel with the first edge, the chord line having a length which is less than the substrate width, the chord line length also being less than a diameter dimension for the semi-circular radiator and a feed positioned on the third surface of the ceramic dielectric substrate; and
operating the ultra-wideband antenna at radio-frequency communications from 3.1 GHz to 10 GHz.
22. The method of claim 21 further comprising operating the ultrawideband antenna at a peak gain of 4 dBi.
23. The method of claim 21 further comprising operating the ultra-wideband antenna at an efficiency of more than 60% across UWB band 1 through UWB band 10.
24. The method of claim 23 wherein the operating of the ultrawideband antenna at an efficiency of more than 60% across UWB band 1 through UWB band 10 occurs simultaneously.
25. The method of claim 23 wherein the ultra-wide antenna further comprises a first connection pad and a second connection pad positioned on the second surface of the ceramic dielectric substrate wherein the first connection pad is positioned adjacent a first side of the feed and the second connection pad is positioned adjacent a second side of the feed opposite the first connection pad.
26. The method of claim 25 wherein the ultra-wide antenna further comprises a third connection pad positioned on the second surface of the ceramic dielectric substrate.
27. An ultra-wideband antenna kit comprising:
one or more ultra-wideband antennas comprising a ceramic dielectric substrate having a substrate length, a substrate width and a substrate thickness, a first surface, a second surface, a third surface, a fourth surface, a fifth surface, and a sixth surface, the ceramic dielectric substrate further comprising a first edge defined by an intersection of the first surface and the third surface, a semi-circular radiator positioned on at least a portion of the first surface of the ceramic dielectric substrate, the semi-circular radiator having a curved side facing the first edge of the ceramic dielectric substrate, the semi-circular radiator further comprising a chord line that is parallel with the first edge, the chord line having a length which is less than the substrate width, the chord line length also being less than a diameter dimension for the semi-circular radiator, and a feed positioned on the third surface of the ceramic dielectric substrate; and
one or more of each of a ground plane, a PCB, a connector, and a cable.
28. The kit of claim 27 wherein the one or more ultra-wideband antennas further comprises a first connection pad and a second connection pad positioned on the second surface of the ceramic dielectric substrate wherein the first connection pad is positioned adjacent a first side of the feed and the second connection pad is positioned adjacent a second side of the feed opposite the first connection pad.
29. The kit of claim 28 wherein the one or more ultra-wideband antennas further comprises a third connection pad positioned on the second surface of the ceramic dielectric substrate.