Self-filtering wideband millimeter wave antenna

Patent metadata

Field	Value
Publication number	US-11575206-B2
Application number	US-202117351281-A
Country	US
Kind code	B2
Filing date	Jun 18, 2021
Priority date	Jun 19, 2020
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

The present invention provides a self-filtering millimeter-wave wideband multilayer planar antenna. The antenna includes a first layer having a slot feed. A second layer includes at least a pair of probes fed by the slot feed from the first layer. A third layer includes at least two substantially planar radiating patches each patch respectively coupled to one of the probes on the second layer. The radiating patches are arranged to radiate a millimeter-wavelength electromagnetic wave when the slot feed receives excitation energy and transmits the energy to the radiating patch through the respective probe. The self-filtering antenna does not require a resonant cavity structure coupled to the radiating patches. Antenna arrays of arbitrary numbers of antenna elements may be constructed from the self-filtering antenna. Such arrays are particularly suitable for 5G mm-wave backhaul communications.

First claim

The invention claimed is:

1. A self-filtering millimeter-wave wideband multilayer planar antenna comprising:
a first layer including a slot feed;
a second layer including at least a pair of probes fed by the slot feed from the first layer; and
a third layer including at least two substantially planar radiating patches each respectively coupled to one of the probes on the second layer, wherein the radiating patches are configured to radiate a millimeter-wavelength electromagnetic wave when the slot feed receives excitation energy and transmits the energy to one of the at least two radiating patches through a respective one of the probes.

2. The self-filtering antenna of claim 1 , wherein the self-filtering antenna does not include a resonant cavity structure.

3. The self-filtering antenna as recited in claim 1 , wherein the first layer is provided on a first substrate including a substrate-integrated waveguide (SIW), wherein the slot feed includes a slot defined on an upper plane of the SIW.

4. The self-filtering antenna as recited in claim 3 , further comprising a pair of stubs connected to the upper plane of the first substrate or to a lower plane of the second substrate in a slot region defined by the coupling slot, and wherein the stubs operate at a quarter wavelength.

5. The self-filtering antenna as recited in claim 1 , wherein the second layer is provided on a second substrate and the second layer includes a coupling slot aligned with the slot feed on the first layer, and the pair of probes is positioned adjacent to the coupling slot.

6. The self-filtering antenna as recited in claim 5 , wherein each of the probes includes a vertical portion and a horizontal portion extending from the vertical portion.

7. The self-filtering antenna as recited in claim 5 , further comprising two loops constructed with conducting vias and strips that span across the coupling slot.

8. The self-filtering antenna as recited in claim 1 , wherein the pair of probe operates at a quarter wavelength, and wherein the slot feed and the pair of radiating patches operate at half wavelength.

9. An antenna array comprising a plurality of the self-filtering antennas of claim 1 .

Assignees

• Univ City Hong Kong

Inventors

• Hu Haotao
• Chan Chi Hou

Classifications

• H01Q9/0457 Primary

  electromagnetically coupled to the feed line · CPC title

• H01Q21/065

  Patch antenna array · CPC title

• H01Q21/0075 Primary

  Stripline fed arrays (H01Q21/065 takes precedence) · CPC title