Distributed Omni-Dual-Band Antenna System for a Wi-Fi Access Point

• US 20160043478A1
• Filed: 07/06/2015
• Published: 02/11/2016
• Est. Priority Date: 07/03/2014
• Status: Active Grant

• Current Assignee: Cambium Networks Limited (Cambium Networks Corporation)
• Original Assignee: Xirrus Incorporated
• Inventors: Hartenstein, Abraham
• Granted Patent: US 9,912,079 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01Q 1/2291 used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN] H01Q1/241 takes precedence; WLAN in general H04W
• CPC Class Codes: H01Q 19/10 using reflecting surfaces
• CPC Class Codes: H01Q 21/205 providing an omnidirectional coverage turnstile aerials H01Q21/26
• CPC Class Codes: H01Q 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

A distributed broadband, omni-dual-band monopole antenna system for use in a Wi-Fi access point. The distributed omni-dual-band antenna system may include an antenna array that includes 4, 6, or 8 monopole antennas arranged in a circular array fashion along the perimeter of the access point. Each monopole antenna may be associated with a single Wi-Fi radio of the access point, and each of the antennas for the different radios are interleaved in order to provide omni-coverage with minimal distortion; that is, each antenna of the access point is alternated with antennas for different radios. A broadband printed omni-dual-band monopole antenna comprising three horizontal radiating elements arranged in an S-shape and a single vertical radiating element connected to the bottom-most horizontal radiating element is also disclosed.

Claims

1. A distributed broadband omni-dual-band antenna system for use in a Wi-Fi access point, the distributed omni-dual band antenna system comprising:

a plurality of radios; and

a plurality of omni-dual-band antennas associated with each radio of the plurality of radios;

wherein the plurality of omni-dual-band antennas are arranged equi-distantly in a circular array fashion along a perimeter of the Wi-Fi access point and each omni-dual-band antenna is alternated with another omni-dual-band antenna associated with a different radio.

2. The distributed broadband omni-dual-band antenna system of claim 1, wherein the plurality of radios comprises two transceivers and the plurality of omni-dual-band antennas comprises four omni-dual-band antennas, with two omni-dual-band antennas associated with each of the two transceivers.

3. The distributed broadband omni-dual-band antenna system of claim 1, wherein the plurality of radios comprises two transceivers and the plurality of omni-dual-band antennas comprises six omni-dual-band antennas, with three omni-dual-band antennas associated with each of the two transceivers.

4. The distributed broadband omni-dual-band antenna system of claim 1, wherein the plurality of radios comprises two transceivers and the plurality of omni-dual-band antennas comprises eight omni-dual-band antennas, with four omni-dual-band antennas associated with each of the two transceivers.

5. The distributed broadband omni-dual-band antenna system of claim 1, further comprising a ceiling conductive ground plane, below which the distributed broadband omni-dual-band antenna system is mounted.

6. The distributed broadband omni-dual-band antenna system of claim 5, further comprising a single wire reflector configured to improve downward reflectivity.

7. The distributed broadband omni-dual-band antenna system of claim 5, further comprising a metallic sheet reflector configured to improve downward reflectivity.

8. A broadband, omni-dual-band printed monopole antenna, comprising:

a first horizontal radiating element;

a second horizontal radiating element;

a third horizontal radiating element; and

a vertical radiating element;

wherein the first horizontal radiating element, the second horizontal radiating element, and the third horizontal radiating element form an S-shaped monopole antenna, with the vertical radiating element connected perpendicularly to the third horizontal radiating element.

9. The broadband, omni-dual-band printed monopole antenna of claim 8,

wherein

the first horizontal radiating element has a length of 8.652 mm and a width of 1.916 mm;

the second horizontal radiating element has a length of 8.002 mm and a width of 1.916 mm;

the third horizontal radiating element has a length of 5.741 mm and a width of 1.916 mm; and

the vertical radiating element has a length of 5.741 mm and a width of 1.916 mm.

10. The broadband, omni-dual-band printed monopole antenna of claim 9, wherein the monopole antenna is a microstrip-fed printed antenna.