CN216251121U

CN216251121U - LTE antenna module

Info

Publication number: CN216251121U
Application number: CN202123026181.XU
Authority: CN
Inventors: 田文伟
Original assignee: Jiangsu Jiahua Communication Technology Co ltd
Current assignee: Jiangsu Jiahua Communication Technology Co ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-04-08
Anticipated expiration: 2031-12-03

Abstract

The utility model discloses an LTE antenna assembly which comprises a mainboard, a support fixed on the mainboard and an antenna installed on the mainboard, wherein the antenna comprises a substrate, a first radiation unit, a second radiation unit, a feeding point and a grounding point, the first radiation unit is arranged on the substrate and comprises a first coupling part, a first connecting part vertically extending from one end of the first coupling part, a second connecting part vertically extending from one end of the first connecting part and parallel to the first coupling part, and a second coupling part vertically extending from the second connecting part and parallel to the first connecting part, and the first coupling part and the second coupling part are in parasitic coupling with the second radiation unit. The design of the bent routing and the parasitic coupling of the radiation unit of the LET antenna realizes the LTE full-band coverage, namely the wide band, and has the advantages of small size, simple structure, easy assembly, low cost and easy batch production.

Description

LTE antenna module

Technical Field

The utility model relates to the technical field of antennas, in particular to an LTE antenna structure.

Background

Currently, for some communication devices including 4G frequency band, the common operating frequency band is LTE (698-. This places increasing demands on the width and miniaturization of communication devices, and thus requires an adaptive support for a small broadband antenna. Many communication devices in the industry cannot achieve full coverage of the LTE frequency band. In order to realize a small and wide band, a slotline on an antenna and a non-planar structure are generally used. The slotline approach may introduce unwanted frequencies while achieving the introduction of multiple resonant frequencies. While the non-planar structure can achieve broadband, it increases the size of the antenna.

Therefore, it is an urgent need in the wireless communication field to design an LTE antenna with small size and wide frequency band.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides an LTE antenna component.

In order to achieve the purpose, the utility model provides the following technical scheme: an LTE antenna assembly comprises a mainboard, a support fixed on the mainboard and an antenna installed on the mainboard, wherein the antenna comprises a substrate, a first radiation unit, a second radiation unit, a feeding point and a grounding point, the first radiation unit is arranged on the substrate and comprises a first coupling part, a first connecting part vertically extending from one end of the first coupling part, a second connecting part vertically extending from one end of the first connecting part and parallel to the first coupling part, and a second coupling part vertically extending from the second connecting part and parallel to the first connecting part, and the first coupling part and the second coupling part are in parasitic coupling with the second radiation unit.

Preferably, the vertical spacing between the first and second coupling parts and the second radiating element is 0.5 mm.

Preferably, the substrate is provided with a protruding portion, the feeding point and the grounding point are arranged on the protruding portion, a notch is formed in the side edge of the support, and the protruding portion extends into the notch after being bent along the side edge.

Preferably, the second radiating element includes a body and an extension portion extending from one side of the body, the extension portion is located on the protruding portion of the substrate and bent together with the protruding portion, and the extension portion is electrically connected to the feeding point.

Preferably, a feed pin and a ground pin are arranged at a position, below the support, of the main board, the feed point on the protruding portion extending into the notch is electrically connected with the feed pin, and the ground point is electrically connected with the ground pin.

Preferably, the feed pin and the grounding pin are both spring contact pins, and are respectively elastically abutted and pressed in contact with the feed point and the grounding point.

Preferably, the first coupling portion is shorter than the second coupling portion, the first connecting portion is shorter than the second coupling portion, and the first coupling portion and the second coupling portion are spaced apart by a distance.

Preferably, the bracket is fixed to the main plate by screws.

Preferably, the substrate is an FPC flexible printed circuit, and is attached to the bracket in a backlight manner.

Preferably, the first radiating element, the second radiating element, the feeding point and the grounding point are all copper-clad structures on the substrate.

The utility model has the beneficial effects that: the design of the bent routing and the parasitic coupling of the radiation unit of the LET antenna realizes the LTE full-band coverage, namely the broadband, the small size and the simple structure.

Drawings

Fig. 1 is a perspective view of an LTE antenna assembly of the present invention.

Fig. 2 is an exploded view of an LTE antenna assembly of the present invention.

Fig. 3 is a schematic diagram of an LTE antenna structure of the present invention.

Fig. 4 is a schematic voltage standing wave ratio diagram of the LTE antenna of the present invention.

Reference numerals:

the antenna assembly 100, the motherboard 1, the rectangular bracket 2, the antenna 3, the substrate 30, the protruding portion 301, the first radiating element 34, the first coupling portion 341, the first connecting portion 342, the second connecting portion 343, the second coupling portion 344, the second radiating element 33, the first side 331, the second side 332, the third side 333, the fourth side 334, the body 335, the extension portion 336, the feeding point 32, and the ground point 31.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

As shown in fig. 1 to 2, in order to implement the best mode of the present invention, an LTE antenna assembly 100 is disclosed, where the antenna assembly 100 includes a main board 1, a rectangular bracket 2 fixedly mounted on the main board 1, and an antenna 3 mounted on the bracket 2. The height of the length and width of the support 2 is respectively 48mm, 23mm and 6mm, screw holes for locking screws are formed in the middle of the support 2, and the support 2 is fixed on the main board 1 through the screw holes. The antenna 3 includes a substrate 30, a first radiating element 34 disposed on the substrate 30, a second radiating element 33, a feeding point 32, and a grounding point 31.

The substrate 30 is an FPC flexible board and is adhered to the bracket 2 by means of a back adhesive. The substrate 30 is provided with a protruding portion 301, a feeding point 32 and a grounding point 31, the side of the bracket 2 is provided with a notch 21, and the substrate 30 is bent along the side of the bracket 2, that is, the protruding portion 301 is bent along the side and extends into the notch 21 after being bent. A feed pin and a ground pin are arranged on the main board 1 below the support 2, the feed pin and the ground pin are elastic contact pins, the feed pin is electrically connected with a feed point 32 on the protruding part 301 extending into the notch 21, the ground pin is electrically connected with a ground point 31 on the protruding part 301 extending into the notch 21, and the feed pin and the ground pin are respectively in elastic abutting contact with the feed point 32 and the ground point 31.

As shown in fig. 3, the first radiation unit 34 includes a first coupling portion 341, a first connection portion 342 extending vertically and upwardly from the first coupling portion 341, a second connection portion 343 extending vertically and horizontally from one end of the first coupling portion 341 and parallel to the first coupling portion 341, and a second coupling portion 344 extending vertically from the second connection portion 343 and parallel to the first connection portion 342. The first coupling portion 341 is shorter than the second connecting portion 343, the first connecting portion 342 is shorter than the second coupling portion 344, and the first coupling portion 341 is spaced apart from the second coupling portion 344. The second radiation unit 33 is substantially rectangular and is located below the first radiation unit 34, and the second radiation unit 33 includes a first side 331, a second side 332 parallel to the first side 331, and a third side 333 and a fourth side 334 perpendicular to the first and second sides 331, 332. The side of the first connecting portion 342 is on the same vertical line as the first side 331 of the first radiating element 34, the first coupling portion 341 is located at one side of the third side 333 and is shorter than the length of the third side 333, the second connecting portion 343 extends beyond the second side 332 of the second radiating element 33, and the second coupling portion 344 extends vertically downward from the second connecting portion 343 and is spaced from the second side 332 by a distance, and extends to the same horizontal position as the fourth side 334. The vertical distance between the first coupling portion 341 and the second radiation unit 33 is 0.5mm smaller than the vertical distance between the second coupling portion 344 and the second radiation unit 33. Parasitic coupling occurs between the first radiation unit 34 and the second radiation unit 33, and the coupling mainly occurs between the first coupling portion 341 of the first radiation unit 34 and the second radiation unit 33.

The second radiating element 33 further includes a body 335 and an extending portion 336 extending downward from the fourth side 334 of the body 335, the extending portion 336 is located on the protruding portion 301 of the substrate 30 and bent together with the protruding portion 301, and the extending portion 336 is electrically connected to the feeding point 32. The length a of the base plate 30 is 47.68mm, the width B is 34.07mm, and the thickness is 0.4 mm. The first radiating element 34, the second radiating element 33, the feeding point 32 and the grounding point 31 are all copper-clad structures on the substrate 30. The total length of the first coupling portion 341, the first connecting portion 342, the second connecting portion 343 and the second coupling portion 344 of the first radiating element 34 is 119.3mm, their widths are all 1.5mm, and the first radiating element 34 is 698-980MHz band. The second radiation unit 33 has a length of 44.8mm and a width of 12.3mm, and the frequency band is 1400-2700 MHz.

As shown in fig. 4, it can be known that the maximum value of the voltage standing wave ratio of the LTE antenna 3 in the entire operating frequency band (698-. It can be seen that the voltage standing wave ratio is well improved.

Therefore, the scope of the present invention should not be limited to the disclosure of the embodiments, but includes various alternatives and modifications without departing from the scope of the present invention, which is defined by the claims of the present patent application.

Claims

1. An LTE antenna assembly comprises a mainboard, a support fixed on the mainboard and an antenna installed on the mainboard, and is characterized in that the antenna comprises a substrate, a first radiation unit, a second radiation unit, a feeding point and a grounding point, wherein the first radiation unit is arranged on the substrate and comprises a first coupling part, a first connecting part vertically extending from one end of the first coupling part, a second connecting part vertically extending from one end of the first connecting part and parallel to the first coupling part, and a second coupling part vertically extending from the second connecting part and parallel to the first connecting part, and parasitic coupling occurs between the first radiation unit and the second radiation unit.

2. The LTE antenna assembly of claim 1 wherein the vertical spacing between the first coupling portion and the second radiating element is 0.5mm less than the vertical spacing between the second coupling portion and the second radiating element.

3. The LTE antenna assembly of claim 1, wherein the substrate has a protrusion, the feeding point and the grounding point are disposed on the protrusion, the bracket has a notch at a side edge, and the protrusion is bent along the side edge and then extends into the notch.

4. The LTE antenna assembly of claim 3, wherein the second radiating element comprises a body and an extension portion extending from one side of the body, the extension portion is located on the protruding portion of the substrate and bent together with the protruding portion, and the extension portion is electrically connected to the feeding point.

5. The LTE antenna assembly of claim 3, wherein the motherboard is provided with a feed pin and a ground pin at a position below the bracket, the feed point on the protrusion extending into the notch is electrically connected to the feed pin, and the ground point is electrically connected to the ground pin.

6. The LTE antenna assembly of claim 5, wherein the feed pin and the ground pin are both spring contact pins, and are respectively in elastic pressing contact with the feed point and the ground point.

7. The LTE antenna assembly of claim 4, wherein the first coupling portion is shorter than the second connecting portion, wherein the first connecting portion is shorter than the second coupling portion, and wherein the first coupling portion is spaced a distance from the second coupling portion.

8. The LTE antenna assembly of claim 1, wherein the bracket is secured to the motherboard by screws.

9. The LTE antenna assembly of claim 1, wherein the substrate is an FPC flexible board and is attached to the bracket by means of an adhesive.

10. The LTE antenna assembly of claim 1, wherein the first radiating element, the second radiating element, the feed point, and the ground point are all copper-clad structures on a substrate.