Multi-band LTE antenna

• US 9,362,621 B1
• Filed: 11/04/2013
• Issued: 06/07/2016
• Est. Priority Date: 05/23/2013
• Status: Active Grant

• Current Assignee: Airgain Incorporated
• Original Assignee: Airgain Incorporated
• Inventors: He, Ziming
• Primary Examiner(s): Duong, Dieu H
• Application Number:
  US14/071,571
• Time in Patent Office: 946 Days
• Field of Search: 343/702, 343/700.MS
• US Class Current: 1/1
• CPC Class Codes: H01Q 1/242 specially adapted for hand-held use
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/40 Radiating elements coated with or embedded in protective material
• CPC Class Codes: H01Q 1/48 Earthing means; Earth screens; Counterpoises
• CPC Class Codes: H01Q 1/50 Structural association of antennas with earthing switches, lead-in devices or lightning protectors
• CPC Class Codes: H01Q 15/14 Reflecting surfaces; Equivalent structures electromagnetic shields H01Q1/526
• CPC Class Codes: H01Q 5/10 Resonant antennas
• CPC Class Codes: H01Q 5/364 Creating multiple current paths
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence
• 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-mounted multi-band LTE antenna that covers the frequency band of 698-960 MHz (LTE 700/800/900 bands) and 2400-2500 GHz (WLAN 2.4G band) is disclosed herein. The antenna preferably has high gain and high radiation efficiency, and is used for a variety of wireless communication devices applications. The surface-mounted multi-band LTE antenna has compact size, wide bandwidth, good return loss, high gain and high radiation efficiency, and no matching circuit is needed.

Claims

1. A multi-band LTE antenna comprising:

a main section;

a first branch section;

a second branch section;

a third branch section; and

a fourth branch section;

a feed pin;

a grounding pin;

wherein the feed pin and the grounding pin are perpendicular to the main section, and located at an edge of a printed circuit board and parallel with the edge of the printed circuit board;

wherein the main section has a length greater than the first branch section;

wherein the first branch section has a length greater than the second branch section;

wherein the second branch section has a length greater than the third branch section;

wherein the third branch section has a length greater than the fourth branch section;

wherein the antenna covers the frequency band of 698 MegaHertz (MHz) to 960 MHz and the frequency band of 2.4 GigaHertz (GHz) to 2.5 GHz;

wherein the antenna has a return loss greater than −

5 dB across an operating frequency ranging from 698 MHz to 960 MHz;

wherein the antenna has a return loss greater than −

9.3 dB across an operating frequency ranging from 2.4 GHz to 2.5 GHz;

wherein the main branch controls the frequencies of 698 MHz to 960 MHz and 2.4 GHz to 2.5 GHz, and the first branch, the second, the third branch and the fourth branch increase the low and high band width.

2. The antenna according to claim 1 wherein the main section has a length ranging from 50 mm to 75 mm.

3. The antenna according to claim 1 wherein the main section has a height ranging from 1 mm to 3 mm.

4. The antenna according to claim 1 further comprising a first floating pin, a second floating pin, a third floating pin and a fourth floating pin.

5. A wireless communication device comprising:

a LTE multi-band antenna apparatus comprising a radiation element comprising a plurality of radiation branches, wherein the plurality of radiation branches consists essentially of a main section, first branch section, a second branch section, a third branch section, and a fourth branch section;

wherein the antenna operates in the multiple bands of frequencies comprising 698-960 MHz and 2400 MHz to 2500 MHz;

wherein the main section controls the frequencies of 698 MHz to 960 MHz and 2.4 GHz to 2.5 GHz, and the first branch, the second, the third branch and the fourth branch increase the low and high band width;

wherein a feed pin and a grounding pin are perpendicular to the main section, and located at an edge of a printed circuit board and parallel with the edge of the printed circuit board.

6. The wireless communication device according to claim 5 further comprising a PCB.

7. The wireless communication device according to claim 5 further comprising a ground pin, a feed pin, a first floating pin, a second floating pin, a third floating pin and a fourth floating pin.

8. The wireless communication device according to claim 5

wherein the main section has a length greater than the first branch section;

wherein the first branch section has a length greater than the second branch section;

wherein the second branch section has a length greater than the third branch section;

wherein the third branch section has a length greater than the fourth branch section.

9. The wireless communication device according to claim 5 further comprising a RF front-end circuit and a connection to the radiation element through a micro-strip line or a coaxial cable.

10. The wireless communication device according to claim 5 further comprising a reflector board.

11. A LTE multi-band antenna apparatus comprising:

a radiation element comprising a plurality of radiation branches, wherein the plurality of radiation branches consists essentially of a main section, first branch section, a second branch section, a third branch section, and a fourth branch section;

wherein the antenna operates in a multiple bands of frequencies comprising 698 MHz-960 MHz and 2.4 GHz to 2.5 GHz;

wherein the main section controls the frequencies of 698 MHz to 960 MHz and 2.4 GHz to 2.5 GHz, and the first branch, the second, the third branch and the fourth branch increase the low and high band width;

wherein a feed pin and a grounding pin are perpendicular to the main section, and located at an edge of a printed circuit board and parallel with the edge of the printed circuit board.

12. The LTE multi-band antenna apparatus according to claim 11 further comprising a housing.