Low profile WiFi antenna with a toroidal pattern

Patent metadata

Field	Value
Publication number	US-10340585-B2
Application number	US-201715657590-A
Country	US
Kind code	B2
Filing date	Jul 24, 2017
Priority date	Jul 24, 2017
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

Various embodiments relate to a low-profile, linearly-polarized patch antenna with parasitic elements at 5.3 GHz for the ISS C-band WiFi band. It may also use the 5.8 GHz band. A protective dome helps to meet low earth orbit space requirements.

First claim

What is claimed is:

1. A low-profile WiFi antenna comprising:
a first ring of printed circuit board (PCB) dielectric material having an antenna outer radius of no more than 30.18 mm;
a second ring of conductive material, located concentrically inside the first ring, having an outer radius of no more than 22.34 mm;
a third ring of printed circuit board (PCB) dielectric material, located concentrically inside the second ring, having an outer radius of no more than 17.93 mm;
a circular patch of conductive material, located concentrically inside the third ring, wherein a coaxial probe feed is placed substantially at a center of the circular patch; and
a protective dome surrounding the first ring and having a height above the first ring, wherein radiation from the low-profile WiFi antenna has a toroidal pattern.

2. The low-profile WiFi antenna of claim 1 , wherein the height of the protective dome is no more than 10 mm.

3. The low-profile WiFi antenna of claim 1 , wherein the circular patch is configured to be fed 5 mm away from the center of the circular patch.

4. The low-profile WiFi antenna of claim 1 , wherein the low-profile WiFi antenna is configured to cover a 5.3 GHz frequency band.

5. The low-profile WiFi antenna of claim 4 , wherein the low-profile WiFi antenna is configured to cover both the 5.3 GHz frequency band and a 5.8 GHz frequency band.

6. The low-profile WiFi antenna of claim 1 , wherein the low-profile WiFi antenna is configured to be deployed on a spacecraft.

7. The low-profile WiFi antenna of claim 1 , wherein an area of the low-profile WiFi antenna is no more than 30 mm 2 .

8. The low-profile WiFi antenna of claim 1 , wherein a hole is disposed substantially at a center of the circular patch.

9. The low-profile WiFi antenna of claim 1 , wherein the hole has a diameter of substantially 1.27 mm.

Assignees

• Nasa

Inventors

• Marrero-Fontanez Victor J

Classifications

• H01Q19/28

  using a secondary device in the form of two or more substantially straight conductive elements (log- periodic antennas H01Q11/10; constituting a reflecting surface H01Q19/10) · CPC title

• H01Q9/0407

  Substantially flat resonant element parallel to ground plane, e.g. patch antenna (dipole H01Q9/285; monopole H01Q9/40) · CPC title

• H01Q5/385

  Two or more parasitic elements · CPC title

• H01Q1/42

  Housings not intimately mechanically associated with radiating elements, e.g. radome · CPC title

• H04B7/18515

  Transmission equipment in satellites or space-based relays · CPC title