Broadband planar antenna

Patent metadata

Field	Value
Publication number	US-2016204513-A1
Application number	US-201414898356-A
Country	US
Kind code	A1
Filing date	Jul 7, 2014
Priority date	Jul 16, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

A broadband antenna includes a uniplanar structure having a plurality of separate and contiguous metallic elements. A first element comprises a substantially circular metallic element having a flattened portion. A second element comprises a substantially linear metallic strip connected to an edge of the first element. The antenna further includes a pair of substantially rectangular side elements disposed on opposite sides of the second element that are electrically isolated from the first and second elements. The antenna can achieve a return loss better than 10 dB over a broadband range.

First claim

What is claimed is:

1 . An antenna, comprising:
a uniplanar structure having a plurality of separate and contiguous metallic elements, wherein a first element comprises a substantially circular metallic element having a flattened portion, a second element comprises a substantially linear metallic strip connected to an edge of the first element, and a pair of substantially rectangular side elements disposed on opposite sides of the second element that are electrically isolated from the first and second elements.

2 . The antenna of claim 1 , wherein the pair of substantially rectangular side elements are of identical shape.

3 . The antenna of claim 1 having a bandwidth extending from about 400 MHz to about 6 GHz.

4 . The antenna of claim 1 , further comprising a connector coupling that includes a coaxial receptacle having a main body mounting portion mountable to the side elements and a center pin configured to connect to the second element.

5 . The antenna of claim 1 , wherein the antenna has an impedance of 50 ohms.

6 . The antenna of claim 1 , wherein the plurality of separate and contiguous metallic elements are disposed on a dielectric substrate.

7 . The antenna of claim 1 , further including a housing to having a low profile cover.

8 . The antenna of claim 7 , wherein one side of the housing further includes an adhesive backing for mounting.

9 . The antenna of claim 1 , wherein each of the antenna elements are mounted onto a support plate via support spacers such that the antenna elements are disposed in the same plane.

10 . The antenna of claim 1 , wherein the first element further includes a first slot formed therein.

11 . The antenna of claim 10 , wherein the first element includes a second slot formed therein, wherein the first slot tunes out a first frequency and the second slot tunes out a second frequency different from the first frequency.

12 . The antenna of claim 1 , wherein the antenna does not include a balun.

13 . The antenna of claim 1 , further comprising a second antenna and a housing to house both antennas in an orthogonal orientation.

Assignees

• 3M Innovative Properties Co

Inventors

• Yemelong Constand E
• Wolf Karl E

Classifications

• H01Q1/007 Primary

  specially adapted for indoor communication · CPC title

• H01Q9/40 Primary

  Element having extended radiating surface · CPC title

• H01Q21/28

  Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} · CPC title

• H01Q1/241

  used in mobile communications, e.g. GSM (H01Q1/247, H01Q1/248 take precedence) · CPC title