QUAD-BAND PCB ANTENNA

• US 20100245198A1
• Filed: 03/29/2010
• Published: 09/30/2010
• Est. Priority Date: 03/31/2009
• Status: Active Grant

• Current Assignee: Tyco Fire & Security GmbH (Johnson Controls International plc)
• Original Assignee: Tyco Safety Products Canada Limited (Johnson Controls International plc)
• Inventors: Wilson, David
• Granted Patent: US 9,166,294 B2
• Time in Patent Office: Days
• US Class Current: 343/767
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 5/20 characterised by the operating wavebands
• CPC Class Codes: H01Q 5/357 using a single feed point
• CPC Class Codes: H01Q 9/0442 with particular tuning means
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

A surface mount antenna includes a ground plane, a feed line, and a radiating element. The ground plane extends in a first direction on a first side of a substrate. The feed line extends in a second direction on a second side of the substrate. The radiating element includes a plurality of segments disposed on the first side of the substrate and is configured to resonate in a plurality of frequency modes.

Claims

1. A planar antenna, comprising:

a ground plane extending in a first direction on a first side of a substrate;

a feed line extending in a second direction on a second side of the substrate; and

a radiating element comprising a plurality of portions disposed on the first side of the substrate, said feed line configured to excite at least one of said plurality of portions to resonate in a corresponding one of a plurality of frequency bands.

2. The planar antenna of claim 1, wherein the radiating element includes a first of said plurality of portions extending in the second direction from the ground plane, and a second of said plurality of portions extending in the first direction from the first portion.

3. The planar antenna of claim 2, wherein the radiating element includes a third of said plurality of portions extending in the second direction from the second portion, and a fourth of said plurality of portions extending from the third portion.

4. The planar antenna of claim 1, wherein each of the plurality of portions of the radiating element are active when the antenna resonates in a first resonant mode.

5. The planar antenna of claim 4, wherein the antenna resonates in the first resonant mode in response to transmitting or receiving signals in accordance with at least one of a Global System for Mobile communications (GSM) 850 or 900 frequency band.

6. The planar antenna of claim 4, wherein the ground plane and the first and second of said plurality of portions of the radiating element define a slot, and wherein a perimeter of the slot is active when the antenna resonates in a second resonant mode.

7. The planar antenna of claim 6, wherein the antenna resonates in the second resonant mode in response to transmitting or receiving signals in accordance with a Global System for Mobile communications (GSM) 1800 frequency band.

8. The planar antenna of claim 6, wherein the ground plane, the first and second portions of the radiating element, and a first section of the third portion of the radiating element are active when the antenna resonates in a third resonant mode.

9. The planar antenna of claim 8, wherein the antenna resonates in the third resonant mode in response to transmitting or receiving signals in accordance with a Global System for Mobile communications (GSM) 1900 frequency band.

10. A planar antenna, comprising:

a ground plane extending in a first direction along a first surface of a printed circuit board (PCB);

a feed line extending in a second direction along a second surface of the PCB; and

a radiating element disposed on the first surface of the PCB and configured to resonate in any one of at least three modes, the mode depending on an input signal frequency radiating element comprising;

a first portion extending from the ground plane,

a second portion extending from the first portion,

a third portion extending from the second portion, and

a fourth portion extending from the third portion.

11. The planar antenna of claim 10, wherein the first, second, third, and fourth portions of the radiating element define a ¼

wavelength radiating element when the surface mount antenna resonates in a first resonant mode.

12. The planar antenna of claim 11, wherein the antenna resonates in the first resonant mode in response to transmitting or receiving signals in accordance with a Global System for Mobile communications (GSM) 850 or a GSM900 frequency band.

13. The planar antenna of claim 10, wherein the ground plane and the first and second portions of the radiating element define a slot, and wherein a perimeter of the slot is active to define a ¼

wavelength radiating element when the surface mount antenna resonates in a second resonant mode.

14. The planar antenna of claim 13, wherein the antenna resonates in the second resonant mode in response to transmitting or receiving signals in accordance with a Global System for Mobile communications (GSM) 1800 frequency band.

15. The planar antenna of claim 10, wherein the ground plane, the first and second portions of the radiating element, and a first section of the third portion of the radiating element are active to define a M wavelength radiating element when the surface mount antenna resonates in a third resonant mode.

16. The planar antenna of claim 15, wherein the antenna resonates in the third resonant mode in response to transmitting or receiving signals in accordance with a Global System for Mobile communications (GSM) 1900 frequency band.

17. An antenna, comprising:

a ground plane extending in a first direction along a first surface of a substrate;

a feed line extending in a second direction along a second surface of the substrate; and

a radiating element disposed on the first surface of the substrate and configured to resonate in at least three modes, the radiating element comprising;

a first portion extending from the ground plane in the second direction,

a second portion extending from the first portion in the first direction,

a third portion extending from the second portion in the second direction, and

a fourth portion extending from the third portion in a substantially perpendicular direction.

18. The antenna of claim 17, wherein the first, second, third, and fourth portions of the radiating element define a ¼

wavelength radiating element when the antenna resonates in a first resonant mode in response to transmitting or receiving signals in accordance with a Global System for Mobile communications (GSM) 850 or a GSM900 frequency band.

19. The antenna of claim 18, wherein the ground plane and the first and second portions of the radiating element define a slot, and wherein a perimeter of the slot is active to define a ¼

wavelength radiating element when the antenna resonates in a second resonant mode in response to transmitting or receiving signals in accordance with a GSM1800 frequency band.

20. The antenna of claim 19, wherein the ground plane, the first and second portions of the radiating element, and a first section of the third portion of the radiating element are active to define a 3 wavelength radiating element when the antenna resonates in a third resonant mode in response to transmitting or receiving signals in accordance with a GSM 1900 frequency band.