CN111211412A

CN111211412A - 4G LTE MIMO antenna

Info

Publication number: CN111211412A
Application number: CN202010127059.2A
Authority: CN
Inventors: 刘小兵; 李勤
Original assignee: Jiangxi Innovation Technology Co ltd
Current assignee: Jiangxi Innovation Technology Co ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-05-29

Abstract

The invention provides a 4G LTE MIMO antenna which is suitable for outdoor application scenes such as vehicle-mounted and ship-mounted scenes needing 4G double antennas, can realize high-speed and stable data receiving and transmitting by matching various terminals using the double antennas, and is characterized in that: including a set of symmetrical metal oscillator that sets up, match PCB and ground plate, the metal oscillator includes vertical portion, in the first radiation portion of the top of vertical portion orientation lateral buckling, be located the feeder pin of vertical portion bottom and by vertical portion extend and with match the common ground connection foot of PCB ground connection, it is insulating between feeder pin and the ground plate. The metal oscillator is formed by combining a metal inverted PIFA structure with a circular grounding plate through a matching PCB, and the grounding pin of the metal oscillator and the matching PCB are locked on the metal grounding plate together by using a screw to form a loop and resonate together with a matching circuit on the matching PCB, so that the antenna works on a 4G full frequency band.

Description

4G LTE MIMO antenna

Technical Field

The invention belongs to the field of wireless communication, and particularly relates to a 4G LTE MIMO antenna.

Background

The fourth generation (4G LTE) mobile communication is being developed vigorously and rapidly popularized, and its core technologies are Multiple Input Multiple Output (MIMO) and orthogonal frequency division multiple access (OFDM), where MIMO is a technology that uses multiple antennas to communicate simultaneously at a transmitting end and a receiving end, so that the communication capacity, data transmission speed, and multipath fading resistance of a communication system can be improved. The mobile communication terminal requires at least two antennas (a main antenna and a sub antenna), and the size of the antenna is required to be larger in order to ensure the isolation between the main antenna and the sub antenna. However, mobile communication terminals are small in size, and even in the case of vehicle-mounted antennas, the size of the antenna is required to be as small as possible due to the limited space for mounting the antenna on the vehicle. This creates a contradiction, in which the antenna needs to be large for good performance, and needs to be as small as possible for practical use.

Currently, the 4G LTE MIMO antenna has a large size, or the main antenna and the auxiliary antenna are divided into two independent antennas and installed separately. This can increase overall antenna manufacturing costs and antenna installation costs. In addition, the antenna size is reduced by reducing the performance of the antenna, and the problem is mainly that the isolation of the antenna is greatly reduced, even less than 10 dB. Because the isolation between the main antenna and the auxiliary antenna is reduced, the whole data throughput rate of the communication system is difficult to improve.

Disclosure of Invention

Based on the problems mentioned in the background technology, the invention provides a 4G LTE MIMO antenna which is suitable for outdoor application scenes such as vehicle-mounted and ship-mounted scenes needing 4G double antennas, and can realize high-speed and stable data transceiving by matching various terminals using double antennas, and the specific technical contents are as follows:

the utility model provides a 4G LTE MIMO antenna, its includes the metal oscillator that a set of symmetry set up, matches PCB and ground plate, the metal oscillator includes vertical portion, in the first radiating part of the top of vertical portion towards a lateral buckling, be located the feeder foot of vertical portion bottom and by extend in vertical portion and with match the ground connection foot of PCB common ground, it is insulating between feeder foot and the ground plate.

In one or more embodiments of the present invention, the ground plate is circular, a feed line through hole is formed at a center of the ground plate, and the group of metal oscillators are symmetrically arranged with respect to the feed line through hole.

In one or more embodiments of the present invention, the vertical portions of the group of metal vibrators are parallel to each other.

In one or more embodiments of the present invention, one end of the vertical portion facing the outer edge of the ground plate is provided with a second radiation portion bent toward one side thereof, and the second radiation portion is bent toward the same side as the first radiation portion.

In one or more embodiments of the present invention, the ground plate is provided with a plastic fixing member for supporting and connecting the bottom end of the metal oscillator, and the feeder pin is disposed on the plastic fixing member.

In one or more embodiments of the present invention, the plastic fixing member includes a slit/groove for clamping the vertical portion of the metal vibrator.

In one or more embodiments of the present invention, a metal screw is extended from the bottom of the grounding plate, and the metal screw has a central axis channel for passing the feeder.

In one or more embodiments of the present invention, the ground plate is provided with an antenna housing, and an annular silicone sealing ring is disposed on an edge of the ground plate.

The invention has the beneficial effects that: the antenna oscillator is formed by combining a metal inverted PIFA structure with a circular ground plate through a matching PCB, a metal oscillator folded pin (ground pin) and the matching PCB are locked on the metal ground plate through screws to form a loop and resonate with a matching circuit on the matching PCB together, so that the antenna works on a 4G full frequency band, the two metal oscillators adopt opposite directions and are fixed on the ground plate through plastic fasteners, and the stability of the antenna in the use of moving scenes is guaranteed. In addition, an annular silica gel sealing ring is adopted between the antenna outer cover and the ground plate to achieve high-efficiency waterproof performance, and the antenna is ensured to normally work in various outdoor environments. The bottom of the antenna extends out of the metal screw rod and is used for installing and fixing the antenna on a vehicle or a ship.

Drawings

Fig. 1 is a schematic view of the external structure of the present invention.

Fig. 2 is a schematic cross-sectional structure of the present invention.

Fig. 3 is a schematic view of the internal structure of the present invention.

Fig. 4 is a schematic view of a connection structure of a metal vibrator and a plastic fixing member according to the present invention.

Detailed Description

The scheme of the present application is further described below with reference to the accompanying drawings 1 to 4:

A4G LTE MIMO antenna comprises a group of symmetrically arranged metal oscillators 1, a matching PCB2, an antenna outer cover 3 and a ground plate 4, wherein the metal oscillators 1 and the matching PCB2 are combined and surrounded by the antenna outer cover 3 and the ground plate 4, and an annular silica gel sealing ring 8 is arranged on the edge of the ground plate 4 to achieve high-efficiency waterproof performance; the metal oscillator 1 comprises a vertical portion 11, a first radiation portion 12 bent towards one side from the top end of the vertical portion 11, a second radiation portion 13 bent towards one side from the vertical portion 11, a feeder pin 14 located at the bottom end of the vertical portion 11, and a ground pin 15 extending from the vertical portion 11 and grounded together with a matching PCB2, wherein the vertical portion 11 is bent towards one side of the outer edge of the ground plate 4, the first radiation portion 12 and the second radiation portion 13 are bent towards the same side, in the specific implementation, the vertical portion 11, the first radiation portion 12 and the second radiation portion 13 are all of a sheet structure, the first radiation portion 12 and the second radiation portion 13 are bent perpendicularly relative to the vertical portion 11, the vertical portions 11 of the group of metal oscillators 1 are parallel to each other, and the feeder pin 14 is insulated from the ground plate 4. The ground plate 4 is circular, a feed line through hole 40 is formed in the center of the ground plate, and the group of metal vibrators 1 are symmetrically arranged relative to the feed line through hole 40. The ground plate 4 is provided with a plastic fixing piece 5 for supporting and connecting the bottom end of the metal oscillator 1, the feeder pin 14 is arranged on the plastic fixing piece 5, and the plastic fixing piece 5 comprises a crack/clamping groove 51 for clamping the vertical part 11 of the metal oscillator 1 and a contact platform 52 for placing the feeder pin 14. A metal screw 6 is extended from the bottom of the grounding plate 4 and used for installing and fixing the antenna on a vehicle or a ship, and the metal screw 6 is provided with a middle shaft channel 60 for penetrating a feeder 7.

The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.

Claims

1. A4G LTE MIMO antenna, characterized in that: including a set of symmetrical metal oscillator that sets up, match PCB and ground plate, the metal oscillator includes vertical portion, in the first radiation portion of the top of vertical portion orientation lateral buckling, be located the feeder pin of vertical portion bottom and by vertical portion extend and with match the common ground connection foot of PCB ground connection, it is insulating between feeder pin and the ground plate.

2. The 4G LTE MIMO antenna of claim 1, wherein: the ground plate is circular, a feeder line through hole is formed in the circle center of the ground plate, and the group of metal vibrators are symmetrically arranged relative to the feeder line through hole.

3. The 4G LTE MIMO antenna of claim 1, wherein: the vertical parts of the group of metal vibrators are parallel to each other.

4. The 4G LTE MIMO antenna of claim 1, wherein: one end of the vertical part, which faces the outer edge of the grounding plate, is provided with a second radiation part bent towards one side of the vertical part, and the second radiation part and the first radiation part are bent at the same side.

5. The 4G LTE MIMO antenna of any of claims 1-4, wherein: and the ground plate is provided with a plastic fixing piece for supporting and connecting the bottom end of the metal oscillator, and the feeder pins are arranged on the plastic fixing piece.

6. The 4G LTE MIMO antenna of claim 5, wherein: the plastic fixing piece comprises a crack/a slot used for clamping the vertical part of the metal oscillator.

7. The 4G LTE MIMO antenna of any of claims 1-4, wherein: and a metal screw rod is extended from the bottom of the grounding plate and provided with a middle shaft channel for the feed line to penetrate through.

8. The 4G LTE MIMO antenna of any of claims 1-4, wherein: the ground plate is provided with an antenna outer cover, and the edge of the ground plate is provided with an annular silica gel sealing ring.