CN218242246U

CN218242246U - High-gain vertical polarization horizontal omnidirectional terminal antenna

Info

Publication number: CN218242246U
Application number: CN202222290128.9U
Authority: CN
Inventors: 卢华刚
Original assignee: Changzhou Ketewa Electronics Co ltd
Current assignee: Changzhou Ketewa Electronics Co ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2023-01-06
Anticipated expiration: 2032-08-30

Abstract

The utility model relates to an omnidirectional antenna technical field, in particular to horizontal omnidirectional terminal antenna of high-gain vertical polarization, have the base plate, the front of base plate is printed with the microstrip feeder, the back of base plate is printed with a plurality of radiating element, connect through the microstrip transmission line between the radiating element, the microstrip transmission line printing is at the back of base plate, the bottom of base plate is equipped with the metallization through-hole, the both ends of metallization through-hole correspond the bottom of microstrip feeder and the bottom of microstrip transmission line respectively, the bottom of base plate is connected with the radio frequency joint; the utility model provides a simple structure, workable, light in weight, the installation of being convenient for is carried, and the uniformity is better, the horizontal omnidirectional terminal antenna of harmonious high-gain vertical polarization of being convenient for.

Description

High-gain vertical polarization horizontal omnidirectional terminal antenna

Technical Field

The utility model relates to an omnidirectional antenna technical field, in particular to horizontal omnidirectional terminal antenna of high-gain vertical polarization.

Background

The omnidirectional antenna has the characteristic of uniform radiation at 360 degrees, so the omnidirectional antenna has very important application in the aspects of establishing a wireless communication network, data communication transmission and the like, and is widely applied to the personal communication field and the military field in particular. In modern communication systems, with the continuous increase of communication channel capacity, communication quality and communication services, the performance requirements for the horizontal omni-directional antenna used are higher and higher. Because the antenna is required to work in a complex environment in modern communication systems, electromagnetic waves are also influenced by environmental factors such as a bad antenna, complex terrain, air humidity and the like in a channel of the electromagnetic waves, and therefore, the adoption of the high-gain omnidirectional antenna is a feasible scheme for improving the communication quality. Particularly in the military field, the horizontal omnidirectional antenna is widely applied to terminal equipment such as personal communication, vehicle-mounted commanders, handsets and the like.

Currently, the realization of an omnidirectional high-gain antenna mainly adopts a parallel connection mode. For the longitudinal straight-line antenna, a feed network in a parallel feed manner is complicated, and sufficient space is not available in a terminal device such as a handset. In addition, the vertical collinear antenna of common high gain of qxcomm technology has coaxial alternately collinear antenna, coaxial fluting antenna and gap coupling coaxial dipole antenna, and it is mostly coaxial antenna structural style, and weight is heavier, and inconvenient installation is carried, and the uniformity is relatively poor, is not convenient for tune.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defect and not enough that prior art exists, providing a simple structure, workable, light in weight, portable installation carries, and the uniformity is better, the horizontal omnidirectional terminal antenna of harmonious high-gain vertical polarization of being convenient for.

Realize the utility model discloses the technical scheme of purpose is: the utility model provides a horizontal omnidirectional terminal antenna of high-gain vertical polarization, has the base plate, the front of base plate is printed with the microstrip feeder, the back printing of base plate has a plurality of radiating element, connect through the microstrip transmission line between the radiating element, the microstrip transmission line printing is at the back of base plate, the bottom of base plate is equipped with the metallization through-hole, the both ends of metallization through-hole correspond the bottom of microstrip feeder and the bottom of microstrip transmission line respectively, the bottom of base plate is connected with the radio frequency and connects.

Furthermore, a branch knot is arranged in the middle of the microstrip transmission line between the radiating units and used for antenna impedance matching.

Furthermore, the radiating unit is composed of radiating oscillators which are symmetrically arranged, and the clear distance D between a radiating arm of each radiating oscillator and the microstrip transmission line is 2.50mm.

Further, the center-to-center distance H between the radiation units is one medium wavelength.

Further, the base plate is accommodated in a shell with an opening at the bottom end, a base is installed at the bottom end of the shell, and the radio frequency connector penetrates through the base through a connecting wire to be connected with the bottom end of the base plate.

Furthermore, the core wire of the connecting wire is welded at the position of the metallized through hole on the back surface of the substrate, and the shielding layer of the connecting wire is welded at the bottom end of the microstrip transmission line.

Furthermore, the branch knot is rectangular.

After the technical scheme is adopted, the utility model discloses following positive effect has:

(1) The utility model adopts the series feed form, avoids the complexity of the parallel feed form, and simultaneously prints the radiation unit, the microstrip feeder line and the microstrip transmission line on the substrate, so that the antenna has simple manufacturing structure, easy processing, light weight, convenient installation and carrying and low cost;

(2) The radiating unit is arranged on the back surface of the substrate instead of the front surface and the back surface of the substrate, so that the impedance of the antenna is easy to adjust;

(3) The utility model can realize good impedance matching only by adjusting the length and width of the branch through the arrangement of the rectangular branch, thereby further facilitating the impedance adjustment of the antenna;

(4) The utility model discloses a radiation oscillator's radiation arm length adjusts corresponding frequency, adjusts every radiation oscillator for the unanimous state to every radiating element's uniformity has been ensured.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic view of the back side of the substrate of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic view of the front side of the substrate of the present invention;

FIG. 5 is an enlarged view of portion B of FIG. 4;

fig. 6 is the standing wave pattern of the present invention;

fig. 7 is an E-plane directional diagram of the present invention;

fig. 8 is an H-plane directional diagram according to the present invention.

In the figure: 1. a substrate; 2. a microstrip feed line; 3. a radiation unit; 3a, a radiation oscillator; 4. a microstrip transmission line; 5. metallizing the through-hole; 6. a radio frequency connector; 7. branch knots; 8. a housing; 9. a base; 10. a connecting wire; 10a, a core wire; 10b, a shielding layer.

Detailed Description

As shown in fig. 1-5, a high-gain vertical polarization horizontal omnidirectional terminal antenna comprises a substrate 1, a microstrip feeder 2 is printed on the front surface of the substrate 1, a plurality of radiation units 3 are printed on the back surface of the substrate 1, the radiation units 3 are connected with each other through a microstrip transmission line 4, the microstrip transmission line 4 is printed on the back surface of the substrate 1, a metalized through hole 5 is arranged at the bottom end of the substrate 1, the two ends of the metalized through hole 5 respectively correspond to the bottom end of the microstrip feeder 2 and the bottom end of the microstrip transmission line 4, and the bottom end of the substrate 1 is connected with a radio frequency connector 6; while the radiating element 3 is disposed on the back surface of the substrate 1 instead of the front and back surfaces of the substrate 1, thereby making it easy to adjust the impedance of the antenna. In addition, the microstrip feeder 2 on the front surface of the substrate 1 is coupled and fed to the plurality of radiation units 3 on the back surface of the substrate 1, so that the bandwidth of the antenna is increased, the antenna has good omnidirectional characteristics in the horizontal direction, and the out-of-roundness of the H surface is less than 2dB. Specifically, the substrate 1 is made of a low-loss material, the microstrip feeder 2 is arranged along the length direction of the substrate 1, the microstrip feeder 2 is a 50-ohm microstrip, the bottom end of the microstrip feeder 2 is not connected with the bottom end of the microstrip transmission line 4, short circuit is avoided, the number of the radiation units 3 is 5, the radiation units are uniformly arranged along the length direction of the substrate 1, the center-to-center distance H between the radiation units 3 is a medium wavelength, and therefore currents between the radiation units 3 are guaranteed to be of equal amplitude and same phase, the middle portions of the radiation units 3 are connected through the microstrip transmission line 4, the radiation units 3 are composed of symmetrically arranged radiation oscillators 3a, and the radiation oscillators 3a are in a Chinese character ' shan ' shape '.

The middle part of the microstrip transmission line 4 between the radiation units 3 is provided with a branch 7 for antenna impedance matching, the branch 7 is rectangular, and through the setting of the rectangular branch 7, good impedance matching can be realized only by adjusting the length and the width of the branch 7, so that the antenna impedance adjustment is further facilitated. In addition, the corresponding frequency is adjusted by the length of the radiating arm of the radiating element 3a, and each radiating element 3a is adjusted to be in a uniform state, thereby ensuring uniformity of each radiating element 3.

Because the distance between the radiating oscillator 3a and the microstrip transmission line 4 is required, impedance variation can be caused due to overlarge distance, coupling between the radiating oscillator 3a and the microstrip transmission line 4 is stronger due to undersize distance, and therefore gain of the antenna can be reduced, the clear distance D between the radiating arm of the radiating oscillator 3a and the microstrip transmission line 4 is set to be 2.50mm in the application.

The base plate 1 is accommodated in a shell 8 with an opening at the bottom end, a base 9 is installed at the bottom end of the shell 8, and the radio frequency connector 6 penetrates through the base 9 through a connecting wire 10 to be connected with the bottom end of the base plate 1. Specifically, the joint of the housing 8 and the base 9 is fixed by a sealant, so as to prevent dust and moisture, thereby ensuring the adaptability of the antenna working environment, the connecting wire 10 is an SMA-J RG178 cable, the core wire 10a of the connecting wire 10 is welded at the metallized through hole 5 on the back surface of the substrate 1, the periphery of the metallized through hole 5 is free, and the shielding layer 10b of the connecting wire 10 is welded at the bottom end (as the ground) of the microstrip transmission line 4.

When the antenna is installed, the antenna is connected with the terminal equipment through the radio frequency connector 6.

As shown in fig. 6-8, the results of HFSS simulation show that the horizontal omni-directional antenna: s11 output standing waves are less than 1.5 (5.1 GHz-5.5 GHz), gain of an E surface is greater than 9dBi, out-of-roundness of an H surface is less than or equal to 2dB, and half-power beam width is 13 degrees, so that the antenna has good horizontal omnidirectional characteristic and high gain characteristic in the working frequency band.

The above-mentioned embodiments, which further illustrate the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A high gain vertically polarized horizontal omni-directional terminal antenna having a substrate (1), characterized in that: the front of base plate (1) is printed with microstrip feeder (2), the back printing of base plate (1) has a plurality of radiating element (3), connect through microstrip transmission line (4) between radiating element (3), microstrip transmission line (4) are printed at the back of base plate (1), the bottom of base plate (1) is equipped with metallized through-hole (5), the both ends of metallized through-hole (5) correspond the bottom of microstrip feeder (2) and the bottom of microstrip transmission line (4) respectively, the bottom of base plate (1) is connected with radio frequency joint (6).

2. The high-gain vertically polarized horizontal omni-directional terminal antenna according to claim 1, wherein: branches (7) are arranged in the middle of the microstrip transmission line (4) between the radiating units (3) and used for antenna impedance matching.

3. A high-gain vertically polarized horizontal omni-directional terminal antenna according to claim 2, wherein: the radiating unit (3) is composed of radiating vibrators (3 a) which are symmetrically arranged, and the clear distance D between a radiating arm of each radiating vibrator (3 a) and the microstrip transmission line (4) is 2.50mm.

4. A high gain vertically polarized horizontal omni directional terminal antenna according to claim 3, wherein: the center-to-center distance H between the radiation units (3) is one medium wavelength.

5. A high gain vertically polarized horizontal omni directional terminal antenna according to any of claims 1-4, wherein: the base plate (1) is accommodated in a shell (8) with an opening at the bottom end, a base (9) is installed at the bottom end of the shell (8), and the radio frequency connector (6) penetrates through the base (9) through a connecting wire (10) to be connected with the bottom end of the base plate (1).

6. A high-gain vertically polarized horizontal omni-directional terminal antenna according to claim 5, wherein: the core wire (10 a) of the connecting wire (10) is welded at the position of the metallized through hole (5) on the back surface of the substrate (1), and the shielding layer (10 b) of the connecting wire (10) is welded at the bottom end of the microstrip transmission line (4).

7. The high-gain vertically polarized horizontal omni-directional terminal antenna according to claim 2, wherein: the branch knot (7) is rectangular.