Front-shielded, coplanar waveguide, direct-fed, cavity-backed slot antenna

Patent metadata

Field	Value
Publication number	US-11515636-B2
Application number	US-202117335528-A
Country	US
Kind code	B2
Filing date	Jun 1, 2021
Priority date	Mar 14, 2019
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

Front-shielded, coplanar waveguide, direct-fed, cavity-backed slot antennas are described. Various implementations form an antenna unit capable of millimeter waveform and/or microwave waveform transmissions. A bottom shielding structure of the antenna unit defines a cavity, where various implementations include one or more dampening structures within the cavity. Some implementations includes a slot antenna within the cavity defined by the bottom shielding structure, such as a coplanar waveguide (CPW) direct-fed slot antenna, to form a cavity-backed slot antenna. Some implementations connect a top shielding structure to the bottom shielding structure to encase the slot antenna. In one or more implementations, the top shielding structure includes aperture windows to allow waveforms within a frequency range from about between 600 Megahertz (MHz) to 72 Gigahertz (GHz). and radiated by the slot antenna to radiate outward from the antenna unit.

First claim

The invention claimed is:

1. A wireless device, comprising:
an antenna array configured with coplanar waveguide (CPW) cavity-backed slot antennas each located within a separate cavity defined by partitions of a bottom shielding structure, the antenna array including a top shielding structure connected to the bottom shielding structure to encase the CPW cavity-backed slot antennas, the bottom shielding structure configured as a first, single conductor and the top shielding structure configured as a second, single conductor connected to the bottom shielding structure;
aperture windows configured in the top shielding structure, each aperture window positioned over a respective one of the CPW cavity-backed slot antennas to radiate waveforms by the CPW cavity-backed slot antennas; and
a direct signal feed electronically coupled from a wireless component to the antenna array for wireless signal transmission as the waveforms radiated by the CPW cavity-backed slot antennas.

2. The wireless device as recited in claim 1 , wherein at least one of the CPW cavity-backed slot antennas is configured as a CPW direct-fed, cavity-backed slot antenna.

3. The wireless device as recited in claim 1 , wherein the bottom shielding structure defines the separate cavity including one or more dampening structures that modify resonance frequencies within the separate cavity of a respective CPW cavity-backed slot antenna.

4. The wireless device as recited in claim 1 , wherein the bottom shielding structure defines the separate cavity including one or more dampening structures that shift a lossy resonance of a frequency within the separate cavity of a respective CPW cavity-backed slot antenna.

5. The wireless device as recited in claim 1 , wherein the aperture windows configured in the top shielding structure radiate the waveforms by the CPW cavity-backed slot antennas within a frequency range from between 600 Megahertz (MHz) to 72 Gigahertz (GHz).

6. The wireless device as recited in claim 1 , further comprising multiple direct signal feeds, each electronically coupled from the wireless component to the respective one of the CPW cavity-backed slot antennas for the wireless signal transmission as the waveforms radiated by the antenna array.

7. The wireless device as recited in claim 1 , wherein the separate cavity has a volume that prevents the separate cavity from resonating at a resonance frequency associated with the respective one of the CPW cavity-backed slot antennas.

8. The wireless device as recited in claim 1 , wherein signals generated for the wireless signal transmission are generated in a frequency range for 5th Generation (5G) wireless signal communication.

9. The wireless device as recited in claim 1 , wherein the antenna array comprises a single aperture window having a geometric shape with a bilateral symmetry about an axis that bisects the single aperture window.

10. The wireless device as recited in claim 1 , wherein the antenna array comprises a single aperture window having a geometric shape with an inverse bilateral symmetry about an axis that bisects the single aperture window.

11. The wireless device as recited in claim 1 , wherein the antenna array comprises a single aperture window having a geometric shape with a first inverse bilateral symmetry about a first axis that bisects the single aperture window and a second inverse bilateral symmetry about a second axis that bisects the single aperture window, the second axis being perpendicular to the first axis.

12. A wireless device, comprising:
a wireless component configured to generate signals for wireless signal transmission;
an antenna array configured with multiple coplanar waveguide (CPW) cavity-backed slot antennas, the antenna array including:
a bottom shielding structure configured as a first, single conductor with partitions forming separate cavities, each corresponding to one of the multiple CPW cavity-backed slot antennas located within one of the separate cavities;
a top shielding structure configured as a second, single conductor connected to the bottom shielding structure to encase the multiple CPW cavity-backed slot antennas in respective ones of the separate cavities;
multiple aperture windows configured in the top shielding structure, each positioned over a respective one of the multiple CPW cavity-backed slot antennas, and configured to radiate waveforms by the multiple CPW cavity-backed slot antennas; and
direct signal feeds electronically coupled from the wireless component to the antenna array for the wireless signal transmission as the waveforms radiated by the multiple CPW cavity-backed slot antennas.

13. The wireless device as recited in claim 12 , wherein the multiple CPW cavity-backed slot antennas are each configured as a coplanar waveguide (CPW) direct-fed, cavity-backed slot antenna.

14. The wireless device as recited in claim 12 , wherein each of the separate cavities has a volume that prevents a respective separate cavity from resonating at a resonance frequency associated with a respective one of the multiple CPW cavity-backed slot antennas.

15. The wireless device as recited in claim 12 , wherein the bottom shielding structure defines the separate cavities including one or more dampening structures that modify resonance frequencies within a separate cavity of a respective one of the multiple CPW cavity-backed slot antennas.

16. The wireless device as recited in claim 12 , wherein the bottom shielding structure defines the separate cavities including one or more dampening structures that shift a lossy resonance of a frequency within a separate cavity of a respective one of the multiple CPW cavity-backed slot antennas.

17. The wireless device as recited in claim 12 , wherein the multiple aperture windows configured in the top shielding structure radiate the waveforms by the multiple CPW cavity-backed slot antennas within a frequency range from about between 600 Megahertz (MHz) to 72 Gigahertz (GHz).

18. The wireless device as recited in claim 12 , wherein the signals generated for the wireless signal transmission are generated in a frequency range for 5th Generation (5G) wireless signal communication.

19. The wireless device as recited in claim 12 , wherein each of the multiple aperture windows have a geometric shape as one of a bilateral symmetry about an axis that bisects an aperture window, or an inverse bilateral symmetry about the axis that bisects the aperture window.

20. The wireless device as recited in claim 12 , wherein each of the multiple aperture windows have a geometric shape with a first inverse bilateral symmetry about a first axis that bisects a single aperture window and a second inverse bilateral symmetry about a second axis that bisects the single aperture window, the second axis being perpendicular to the first axis.

Assignees

• Motorola Mobility Llc

Inventors

• Zhao Junsheng
• Krenz Eric Le Roy
• Smith Hugh

Classifications

• H01Q1/52

  Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure (absorbing means H01Q17/00) · CPC title

• H01Q13/106

  Microstrip slot antennas (patch antenna elements H01Q9/0407) · CPC title

• H01Q13/18 Primary

  the slot being backed by, or formed in boundary wall of, a resonant cavity (longitudinally slotted cylinder H01Q13/12 ){; Open cavity antennas} · CPC title

• H01Q21/0037

  linear waveguide fed arrays · CPC title

• H01Q1/243 Primary

  with built-in antennas · CPC title