CN111987443A

CN111987443A - Miniaturized concatenation formula communication antenna

Info

Publication number: CN111987443A
Application number: CN202010805871.6A
Authority: CN
Inventors: 李文博; 阎昱林; 陈高波
Original assignee: Zhejiang Jinyichang Technology Co ltd
Current assignee: Zhejiang Jinyichang Technology Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2020-11-24

Abstract

The invention discloses a miniaturized splicing type communication antenna which comprises copper-clad PCB assembly plates, wherein an antenna dielectric plate, an antenna radiation surface, a feed end and a grounding end are arranged on the PCB assembly plates, the number of the PCB assembly plates is at least two, at least one PCB assembly plate is provided with a welding point exposed with copper, at least one PCB assembly plate is provided with a welding through hole exposed with copper, the two PCB assembly plates are inserted into the welding through hole through the welding point and form a welding structure for fixation, the antenna radiation surface, the antenna dielectric plate, the feed end and the grounding surface are connected with the welding point or the welding through hole on the respective PCB assembly plate, and the antenna dielectric plate and the antenna radiation surface are arranged on the outer side of the PCB assembly plates. The antenna is characterized in that a three-dimensional space structure is formed by splicing and inserting a plurality of PCB assembly plates, so that the performance of the antenna is improved under the condition of not increasing the space volume.

Description

Miniaturized concatenation formula communication antenna

Technical Field

The invention relates to the technical field of wireless communication antennas. In particular to a miniaturized splicing type communication antenna.

Background

Generally, a communication antenna usually adopts a planar structure or an L-shaped three-dimensional structure, wherein the L-shaped three-dimensional structure is mostly used for a PIFA antenna, and miniaturization is usually achieved by folding a radiating element, slotting to increase coupling and the like, but the transverse and longitudinal dimensions of the communication antenna cannot be reduced too much, and excessive reduction of the spacing between radiating arms for pursuing miniaturization leads to poor antenna performance, and the increase of the transverse and longitudinal dimensions leads to certain violation of miniaturization requirements.

Disclosure of Invention

In order to solve the problems, the invention provides a miniaturized splicing type communication antenna which is small in size, light in weight, wide in frequency band and good in radiation performance.

In order to achieve the purpose, the miniaturized splicing type communication antenna comprises PCB assembly plates coated with copper, wherein an antenna dielectric plate, an antenna radiation surface, a feed end and a grounding end are arranged on the PCB assembly plates, at least two PCB assembly plates are arranged, welding points exposed with copper are arranged on at least one PCB assembly plate, welding through holes exposed with copper are arranged on at least one PCB assembly plate, the two PCB assembly plates are inserted into the welding through holes through the welding points and form a welding structure for fixing, the antenna radiation surface, the antenna dielectric plate, the feed end and the grounding surface are connected with the welding points or the welding through holes on the respective PCB assembly plates, and the antenna dielectric plate and the antenna radiation surface are arranged on the outer sides of the PCB assembly plates. The antenna is characterized in that a three-dimensional space structure is formed by splicing and inserting a plurality of PCB assembly plates, so that the performance of the antenna is improved under the condition of not increasing the space volume.

The further scheme is that the welding structure is secondarily fixed through an adhesive applying structure, and the adhesive applying structure is arranged on the reverse side of an antenna radiation surface of the PCB assembly board. Thereby improving the stability of the welded structure connection.

The further scheme is that an included angle of 80-170 degrees is formed between the two adjacent PCB assembling plates, the connection form between the two PCB assembling plates is guaranteed by limiting the included angle between the PCB assembling plates, and the antenna effect is guaranteed while the stability is improved.

The antenna radiation surface and the antenna dielectric plate are both subjected to copper exposure treatment through the cutting angle to form the welding point, so that the electric connection effect of the welding point is ensured, and the production difficulty and the production cost are reduced.

The PCB assembling plate has three parts, wherein two parts are provided with welding points, the other part is provided with a welding through hole, and the two PCB assembling plates with the welding points are connected on the PCB assembling plate with the welding through hole through the welding structure. Through the setting of three PCB assembly boards, can increase the antenna effect under the condition that does not increase original antenna volume.

The PCB assembly board is made of copper-clad FR-4 material; the side length of the antenna radiation surface is L = lambda/4 when the antenna is designed, and lambda is the wavelength of the antenna working frequency. Therefore, the size of the whole antenna can be controlled by further limiting the size of the antenna radiation surface and the antenna dielectric plate so as to adapt to the application scene of modernization.

Compared with the prior art, the miniaturized spliced communication antenna designed by the invention improves the space utilization rate through the three-dimensional structure formed by the PCB assembly plates. The radiation surface on the PCB assembly board faces outwards, and after the welding points are spliced and welded, the antenna can be tested and applied through the feed end and the grounding end. Simultaneously, the resonance frequency point of the antenna can be effectively adjusted by adjusting the side length of each radiating surface, the working frequency bandwidth can be effectively expanded by adjusting the gap between each radiating surface, and a new resonance frequency point and the working frequency bandwidth can be effectively generated by adjusting the slotting size of each radiating surface. The miniaturized splicing type communication antenna can be installed and used on metal or nonmetal surfaces or directly and independently used, can be applied to various narrow spaces, effectively solves the comprehensive matching problems of bandwidth expansion, multiple frequency bands, good electrical performance, good radiation capacity and the like in the miniaturized design of the antenna, and has the characteristics of small size, light weight, multiple frequency band coverage, good electrical performance, good and stable radiation performance and the like.

Drawings

FIG. 1 is a perspective view showing the overall structure of example 1;

fig. 2 is a schematic structural view of a first antenna splice part in embodiment 1;

FIG. 3 is a schematic structural diagram of a second antenna splicing part in embodiment 1;

FIG. 4 is a schematic structural diagram of a third antenna splicing part in the embodiment 1;

FIG. 5 is a graph showing the test of standing waves of the antenna of example 1;

fig. 6 is the antenna radiation pattern of embodiment 1;

FIG. 7 is a perspective view of the overall structure of example 1 in another direction.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1.

As shown in fig. 1-4 and fig. 7, the present embodiment describes a miniaturized split communication antenna, which includes a first antenna split portion 1 formed by one PCB assembly board 4, a second antenna split portion 2 formed by another PCB assembly board 4, and a third antenna split portion 3 formed by a third PCB assembly board 4. As shown in fig. 2, a part of the first antenna splicing portion 1 is coated with copper to generate a first radiation surface 11, a part of the first radiation surface 11 extending to the edge of the first antenna splicing portion 1 is subjected to corner cutting and copper exposing to form a welding point 5, and meanwhile, a corresponding welding point 5 is also formed by performing corner cutting and copper exposing on the feeding terminal 7 and the grounding terminal 8, wherein the part connecting the welding point 5 and the feeding terminal 7 and the grounding terminal 8 is also considered as the first radiation surface 11. As shown in fig. 3, a portion of the second antenna splicing portion 2 is coated with copper to generate a second radiation surface 21, and a portion of the second radiation surface 21 extending to the edge of the second antenna splicing portion 2 is subjected to corner cutting and copper exposing treatment to form a welding point 5. Referring to fig. 4, a third radiation surface 31 is formed by partially coating copper on the third antenna splicing portion 3, a through hole 6 for copper exposure treatment is arranged on a portion of the third radiation surface 31 extending to the edge of the third antenna splicing portion 3, the position of the through hole 6 is ensured to correspond to the positions of the welding points 5 on the first antenna splicing portion 1 and the second antenna splicing portion 2, and then after welding of each welding point and the through hole is completed, glue is applied to a splicing gap on the surface opposite to the radiation surface 11 of the first antenna splicing portion 1, the second radiation surface 21 of the second antenna splicing portion 2 and the third radiation surface 31 of the third antenna splicing portion 3 to perform secondary fixation. The included angle between two adjacent PCB assembly plates is fixed at 80-170 degrees, and in the embodiment, the included angle is precisely fixed at 90 degrees to form a right angle.

And when the working frequency of the antenna is lambda, the length of the long side of the radiation surface of the antenna is L according to calculation, and meanwhile, the length of the long side of the PCB assembly board is designed to be 36.5-38.5mm, and the length of the short side of the PCB assembly board is designed to be 8-10 m. Wherein none of said side lengths comprises the length of a solder joint 5.

Specific performance tests of such a miniaturized, tiled communications antenna are shown in fig. 5-6. As can be seen from fig. 5, the antenna has a good low standing wave in the frequency band; as can be seen from fig. 6, the antenna has good omnidirectional radiation directivity with less null depth; and the gain effect of the antenna at each main frequency point is shown in table 1 below.

Table 1:

Frequency （MHz）	700	824	888	960	1710	1850	1990	2170	2690
										Gain（dBi）	1.53	1.87	2.02	2.13	2.44	2.21	2.98	2.84	2.76

as can be seen from table 1, the antenna has good gain effect at each main frequency point.

Claims

1. The utility model provides a miniaturized concatenation formula communication antenna, is equipped with antenna dielectric plate, antenna radiation face, feed end and earthing terminal including the PCB assembled plate that covers copper on the PCB assembled plate, characterized by the PCB assembled plate be two at least, wherein be equipped with the welding point that exposes the copper on at least one PCB assembled plate, be equipped with the welding through-hole that exposes the copper on at least one PCB assembled plate, aforementioned two PCB assembled plates insert behind the welding through-hole and form welded structure and fix through aforementioned welding point, antenna radiation face, antenna dielectric plate, feed end and ground plane and welding point or welding through-hole on PCB assembled plate separately be connected, just antenna dielectric plate and antenna radiation face set up inboard or the outside at the PCB assembled plate according to actual demand.

2. The miniaturized splicing type communication antenna according to claim 1, wherein the soldering structure is secondarily fixed by an adhesive applying structure, and the adhesive applying structure is disposed on a reverse side of an antenna radiation surface of the PCB assembly board.

3. The miniaturized, tiled communications antenna of claim 1, wherein the two adjacent PCB mounting boards form an angle of 80-170 degrees therebetween.

4. The miniaturized patch communication antenna of claim 1, wherein the antenna radiating surface and the antenna dielectric plate are formed with the solder joint by a corner cut copper exposure process.

5. The small-sized spliced communication antenna as claimed in claim 1, wherein the PCB assembly board has three pieces, two of which are provided with the soldering points, and the other of which is provided with the soldering through-holes, and the two PCB assembly boards having the soldering points are connected to the PCB assembly board having the soldering through-holes by the soldering structure.