IP Library › Granted Patent US 12,431,621
Granted Patent B2
US 12,431,621 · App. 18/160,065 · Granted Sep 30, 2025

Compact dual band antenna

Inventors: Zhong Liu (Doylestown, PA); Amit B. Kulkarni (Duluth, GA); Justin Jose (Muvattupuzha, IN)
Assignee: HONEYWELL INTERNATIONAL INC.
H01Q5/307H01Q1/48H01Q9/0407
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Quick Facts
Patent No.
US 12,431,621
App. No.
18/160,065
Filed
Jan 26, 2023
Granted
Sep 30, 2025
Kind
B2
Art Unit
2844
USPC
343/848
Abstract

An antenna system formed by one or more layers of a Printed Circuit Board (PCB). The antenna system includes a first antenna element configured to resonate in a first frequency band centered at about 5.4 GHz and a second antenna element configured to resonate in a second frequency band centered at about 2.4 GHz. The first antenna element and the second antenna element fit within a rectangular area of less than about 100 square millimeters on the PCB. The first antenna element has a bandwidth of at least 2 GHz and the second antenna element has a bandwidth of at least 100 MHz, wherein the bandwidth is defined as having less than a −10 dB return loss within the band. The first antenna element and the second antenna element may be formed on a common conductive layer of a PCB.

Claims (48)

1. A dual band antenna, comprising:

a ground plane formed by a first conductive layer of a Printed Circuit Board (PCB);

a first antenna element formed by the first conductive layer of the PCB, the first antenna element is spaced from and electrically isolated from the ground plane, the first antenna element includes a first member forming a vertical portion of the first antenna element and a second member orthogonal to the vertical portion, the first antenna element is configured to resonate in a first frequency band that is centered at about 5.4 GHz;

a second antenna element formed by the first conductive layer of the PCB, the second antenna element is electrically connected to the ground plane and electromagnetically coupled to the first antenna element, the second antenna element includes:

a third member that extends along a first path that extends from the ground plane to a fourth member, wherein the first path is at least substantially parallel with the first member of the first antenna element wherein the fourth member extends along a second path that is at least substantially parallel with the second member of the first antenna element and substantially orthogonal to the first path of the third member;

a fifth member connected with the fourth member and extending at least substantially parallel with the third member;

wherein the second antenna element extends at least partially around at least part of at least three sides of the second member of the first antenna element, the second antenna element is configured to resonate in a second frequency band that is centered at about 2.4 GHz; and

wherein the first antenna element and the second antenna element fit within a rectangular area of less than about 100 square millimeters on the PCB.

2. The dual band antenna of claim 1 , wherein the first antenna element and the second antenna element fit within a rectangular area of less than about 75 square millimeters on the PCB.

3. The dual band antenna of claim 1 , wherein the first antenna element is T-shaped.

4. The dual band antenna of claim 1 , wherein the first antenna element has a bandwidth of at least 2 GHz and the second antenna element has a bandwidth of at least 100 MHz, wherein the bandwidth is defined as having less than a −10 dB return loss within the band.

5. The dual band antenna of claim 1 , wherein:

the first member has a major dimension of less than about 5 millimeters;

the second member has a major dimension of less than about 10 millimeters;

the third member has a major dimension of less than about 10 millimeters; and

the fourth member has a major dimension of less than about 15 millimeters.

6. The dual band antenna of claim 5 , wherein the fifth member has a major dimension that is less than the major dimension of the first member.

7. The dual band antenna of claim 5 , wherein first member has a minor dimension of less than about 2 millimeters.

8. The dual band antenna of claim 5 , wherein second member has a minor dimension of less than about 4 millimeters.

9. The dual band antenna of claim 5 , wherein:

the third member has a minor dimension of less than about 1 millimeters;

the fourth member has a minor dimension of less than about 1.5 millimeters; and

the fifth member has a minor dimension of less than about 1.5 millimeters.

10. The dual band antenna of claim 5 , wherein a major dimension of the rectangular area is less than 15 millimeters.

11. A dual band antenna comprising:

a ground plane formed by a first conductive layer of a Printed Circuit Board (PCB);

a first antenna element formed by the first conductive layer of the PCB, the first antenna element is spaced from and electrically isolated from the ground plane, the first antenna element is T-shaped, with a first member forming a vertical portion of the T and a second member orthogonal to the vertical portion of the T, the first antenna element is configured to resonate in a first frequency band that is centered at about 5.4 GHz;

a second antenna element formed by the first conductive layer of the PCB, the second antenna element is electrically connected to the ground plane and electromagnetically coupled to the first antenna element, the second antenna element comprises:

a third member that extends along a first linear path that extends from the ground plane to a fourth member, wherein the first linear path is at least substantially parallel with the first member of the first antenna element wherein the fourth member extends along a second linear path that is at least substantially parallel with the second member of the first antenna element and substantially orthogonal to the first linear path of the third member;

a fifth member connected with the fourth member and extending at least substantially parallel with the third member; and

wherein the second antenna element extends at least partially around at least part of at least three sides of the second member of the first antenna element, and wherein the second antenna element is configured to resonate in a second frequency band that is centered at about 2.4 GHZ;

wherein the first antenna element and the second antenna element fit within a rectangular area of less than about 100 square millimeters on the PCB.

12. The dual band antenna of claim 11 , wherein a spacing between the second member of the first antenna element and the fifth member of the second antenna element influences the electromagnetic coupling between the first antenna element and the second antenna element.

13. The dual band antenna of claim 11 , wherein:

the first member has a major dimension of less than about 5 millimeters;

the second member has a major dimension of less than about 10 millimeters;

the third member has a major dimension of less than about 10 millimeters; and

the fourth member has a major dimension of less than about 15 millimeters.

14. The dual band antenna of claim 13 , wherein the fifth member has a major dimension that is less than the major dimension of the first member.

15. The dual band antenna of claim 13 , wherein first member has a minor dimension of less than about 2 millimeters.

16. The dual band antenna of claim 13 , wherein second member has a minor dimension of less than about 4 millimeters.

17. The dual band antenna of claim 13 , wherein:

the third member has a minor dimension of less than about 1 millimeters;

the fourth member has a minor dimension of less than about 1.5 millimeters; and

the fifth member has a minor dimension of less than about 1.5 millimeters.

18. The dual band antenna of claim 13 , wherein a major dimension of the rectangular area is less than 15 millimeters.

19. The dual band antenna of claim 11 , wherein the first antenna element and the second antenna element fit within a rectangular area of less than about 75 square millimeters on the PCB.

20. The dual band antenna of claim 11 , wherein the first antenna element has a bandwidth of at least 2 GHz and the second antenna element has a bandwidth of at least 100 MHz, wherein the bandwidth is defined as having less than a-10 dB return loss within the band.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 26, 2023
From: LIU, ZHONG; KULKARNI, AMIT B.; JOSE, JUSTIN
To: HONEYWELL INTERNATIONAL INC.
Reel/Frame 062501/0065 →
Continuity (1)
Related Publication 20240258693A1 · Aug 1, 2024
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