CN217983680U

CN217983680U - Multi-rectangular patch combined single U-shaped metal cylinder multi-frequency microstrip antenna

Info

Publication number: CN217983680U
Application number: CN202222350225.2U
Authority: CN
Inventors: 邓辉; 杨阳; 张光旻; 沈飞
Original assignee: Dongguan University of Technology
Current assignee: Dongguan University of Technology
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2022-12-06
Anticipated expiration: 2032-09-05

Abstract

The invention discloses a multi-frequency microstrip antenna with multi-rectangular patches combined with a single U-shaped metal cylinder, which comprises: the antenna comprises a radiator, a dielectric substrate, a metal ground, a feeder line and a single U-shaped metal cylinder; laying a plurality of rectangular combined metal patches on a dielectric substrate; the single U-shaped metal cylinder array and the upper and lower metal patches jointly form a resonant cavity, the resonant cavity is connected with a metal feeder line to provide a new resonant frequency point for the antenna, so that the microstrip antenna generates a plurality of frequency bands, and the microstrip antenna has the advantages of simple structure, small volume and easy manufacture.

Description

Multi-rectangular patch combined single U-shaped metal cylindrical multi-frequency microstrip antenna

Technical Field

The utility model belongs to the technical field of light microstrip antenna, more specifically say, relate to a multifrequency microstrip antenna that many rectangles paster combine single U type metal cylinder.

Background

In wireless communication systems, antennas are essential and important components. With the development of wireless communication systems, the design technology of antennas is also continuously advanced and improved, for example, the multi-band of antennas is a development trend, and must be considered in the design process of antennas. The resonance branching method is the most applied and most easily understood multi-frequency implementation method. The antenna is widely applied to the design of the traditional GSM/DCS/PCS and dual-frequency WIFI antennas. In 2014, "Design of Dual-band Filter for GSM and WLAN application" published by Du Li Bo, dual-band antenna and Dual-band Filter are designed for Dual-band GSM communication system and Dual-band WLAN communication system. The GSM dual-frequency antenna is realized by adopting an improved symmetrical dipole antenna structure. The antenna consists of two groups of symmetrical oscillators, wherein one group of the symmetrical oscillators is a folded strip oscillator and is used for radiating low-frequency signals; and the other group is a butterfly oscillator for radiating high-frequency signals.

The frequency multiplication design utilizes the principle of harmonic waves to realize a branch into a plurality of frequency bands. In the design of the single-branch antenna, the multi-frequency resonance of the single-branch antenna can be realized by reasonably utilizing the harmonic characteristics through some structural modes. In 2015, in "Study and Design of Multiband Monopole Patch Antenna" published by Liu Tao, a rectangular Monopole Antenna adopting a multi-branch structure is operated in a WLAN/WiMAX frequency band, and the rectangular Monopole Antenna comprises a dense multi-branch structure and forms different resonant current paths respectively, so that multi-frequency operation is realized.

However, the multi-branch structure is generally used in two frequency bands with ideal effect, when the frequency band exceeds three frequency bands or when the length of the branch exceeds three branches, the mutual interference between the branches becomes large, and the performance of each frequency band of the antenna is deteriorated due to the branches. The multifrequency of single branch all appears 3 times fundamental wave, and the high frequency resonance point that has few multifrequency antenna of actual antenna design just appears on the odd number times of fundamental wave, carries out structure bending etc. to monopole or dipole antenna moreover after, the resonance frequency point of antenna high frequency can slowly become low.

Disclosure of Invention

An object of the utility model is to overcome prior art's not enough, provide a many rectangles paster and combine single U type metal cylinder's multifrequency microstrip antenna, combine single "U" type metal cylinder to realize microstrip antenna through many rectangles metal paster and produce a plurality of frequency channels.

In order to achieve the above object, the present invention provides a multi-frequency microstrip antenna with multiple rectangular patches combined with a single U-shaped metal cylinder, comprising: the device comprises a radiator, a dielectric substrate, a metal ground, a feeder line and a single U-shaped metal cylinder;

the dielectric substrate is a rectangular dielectric block, rectangular metallization is carried out on the bottom of the dielectric substrate, and the dielectric substrate is used as a metal ground of the multi-frequency microstrip antenna and is grounded; arranging a metal patch combined by a plurality of rectangles on the front surface of the dielectric substrate to be used as a radiator of the antenna; the radiator is divided into three rectangular blocks, including a large rectangular block positioned at the top end of the front surface of the medium substrate, a vertical rectangular block positioned in the center and a transverse rectangular block flush with the bottom end of the vertical rectangular block; the edges of the transverse rectangular blocks are provided with single U-shaped metal cylinders which are uniformly distributed, the upper round surface of each metal cylinder is arranged on the metal patch, and the rest parts penetrate through the dielectric substrate and the metal ground; one end of the vertical rectangular block is provided with a metal feeder line connected with the metal patch, and the metal feeder line is arranged on the front surface of the dielectric substrate.

The invention aims to realize the following steps:

the invention relates to a multi-frequency microstrip antenna with a plurality of rectangular patches combined with a single U-shaped metal cylinder, which comprises: the device comprises a radiator, a dielectric substrate, a metal ground, a feeder line and a single U-shaped metal cylinder; laying a plurality of rectangular combined metal patches on a dielectric substrate; the single U-shaped metal cylinder array and the metal patches on the upper surface and the lower surface form a resonant cavity together, the resonant cavity is connected with the metal feeder line to provide a new resonant frequency point for the antenna, so that the microstrip antenna generates a plurality of frequency bands, and the microstrip antenna has the advantages of simple structure, small volume and easy manufacture.

Drawings

FIG. 1 is a schematic diagram of a multi-frequency microstrip antenna structure with multiple rectangular patches combined with a single U-shaped metal cylinder;

fig. 2 is a schematic diagram of a radiator;

FIG. 3 is a schematic drawing of a penetration of a metal cylinder;

FIG. 4 is a schematic illustration of a metal;

fig. 5 is a schematic size diagram of the multi-frequency microstrip antenna shown in fig. 1;

fig. 6 is a diagram of simulation results of the multi-frequency microstrip antenna shown in fig. 1.

Detailed Description

The following description of the embodiments of the present invention is provided in order to better understand the present invention for those skilled in the art with reference to the accompanying drawings. It is to be expressly noted that in the following description, a detailed description of known functions and designs will be omitted when it may obscure the subject matter of the present invention.

Examples

Fig. 1 is a schematic diagram of a multi-frequency microstrip antenna structure with multiple rectangular patches combined with a single U-shaped metal cylinder.

In this embodiment, as shown in fig. 1, the multi-rectangular patch antenna of the present invention is a multi-frequency microstrip antenna combining a single U-shaped metal cylinder, and is characterized by comprising: the device comprises a radiator 1, a dielectric substrate 2, a metal ground 3, a feeder 4 and a single U-shaped metal cylinder 5;

the dielectric substrate 1 is a rectangular dielectric block, and as shown in fig. 4, rectangular metallization is performed on the bottom of the dielectric substrate 1 to serve as a metal ground 3 of the multi-frequency microstrip antenna for grounding; as shown in fig. 2, a metal patch formed by combining a plurality of rectangles is arranged on the front surface of a dielectric substrate 1, and is used as a radiator 1 of an antenna; the radiator 1 is divided into three rectangular blocks, including a large rectangular block positioned at the top end of the front surface of the medium substrate, a vertical rectangular block positioned in the center and a transverse rectangular block flush with the bottom end of the vertical rectangular block; the edges of the transverse rectangular blocks are provided with single U-shaped metal cylinders 5 which are uniformly distributed, as shown in figure 3, the upper round surface of each metal cylinder is arranged on the metal patch, and the rest parts penetrate through the dielectric substrate and the metal ground; one end of the vertical rectangular block is provided with a metal feeder 4 connected with the metal patch, and the metal feeder 4 is arranged on the front surface of the dielectric substrate 2.

In this embodiment, the size labels of the multi-rectangular patch-combined single-U-shaped metal cylindrical multi-frequency microstrip antenna are shown in fig. 5, and specific size values are shown in table 1;

name (R)	L	L0	L1	L2	W0	W2	Wd	Wx
									Size of	2	30.21	17.45	15	37.26	2.98	18.765	38.765
Name (R)	pok	kkk	pol	sl	H	d	P
									Size of	18	35	10	4	1.6	1	3

TABLE 1 (unit mm)

In this embodiment, the dielectric substrate is made of a plate material FR4 and having a dielectric constant of 4.4; with reference to fig. 2 and table 1, we can see that the length and width of the dielectric substrate is 83.765mm × 60mm, and the thickness is 1.6mm.

The impedance of the metal feeder is 50 ohm, and the metal feeder is composed of metal patches with the length and the width of 15 multiplied by 2.98mm in the embodiment.

As shown in fig. 2, the radiator can be divided into three rectangles, the length and width of the big rectangle is 60 × 38.765mm; the length and width of the vertical rectangle are 30 multiplied by 2.98mm; the length and width of the transverse rectangle are 18 multiplied by 10mm; as shown in FIG. 4, the length and width of the metal land are 60mm × 35mm.

In this embodiment, 18 metal cylinders are in a shape of a "U" transversely arranged with openings facing inwards, the distribution interval of each metal cylinder is 2mm, the diameter of each metal cylinder is 1mm, wherein the distance between the cylinders at the upper and lower sides and the patch edge at the upper and lower sides is L =2mm, and the distance between the cylinder at the right side and the patch edge at the right side P =3mm.

Fig. 6 shows the reflection coefficient of the multi-frequency microstrip antenna with the combination of the multi-rectangular patch and the single U-shaped metal cylinder along with the frequency variation curve.

In this embodiment, by simulating a multi-frequency microstrip antenna in which multiple rectangular patches are combined with a single U-shaped metal cylinder, it can be seen from fig. 6 that the simulated return loss is lower than-10 dB in the frequency ranges of 3.17-3.30GHZ, 4.56-4.89GHZ, 5.56-5.86GHZ, 7.99-8.58GHZ, and 9.68-10.0GHZ, thereby realizing that the same antenna generates multiple frequency bands at the same time.

Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all matters of the invention which utilize the inventive concepts are protected.

Claims

1. The utility model provides a many rectangles paster combine single U type metal cylinder's multifrequency microstrip antenna which characterized in that includes: the device comprises a radiator, a dielectric substrate, a metal ground, a feeder line and a single U-shaped metal cylinder;

the dielectric substrate is a rectangular dielectric block, rectangular metallization is carried out on the bottom of the dielectric substrate, and the dielectric substrate is used as a metal ground of the multi-frequency microstrip antenna and is grounded; arranging a metal patch combined by a plurality of rectangles on the front surface of the dielectric substrate to be used as a radiator of the antenna; the radiator is divided into three rectangular blocks, including a large rectangular block positioned at the top end of the front surface of the medium substrate, a vertical rectangular block positioned in the center and a transverse rectangular block flush with the bottom end of the vertical rectangular block; the edges of the transverse rectangular blocks are provided with single U-shaped metal cylinders which are uniformly distributed, the upper circular surface of each metal cylinder is arranged on the metal patch, and the rest parts penetrate through the dielectric substrate and the metal ground; one end of the vertical rectangular block is provided with a metal feeder line connected with the metal patch, and the metal feeder line is arranged on the front surface of the dielectric substrate.

2. The multi-frequency microstrip antenna according to claim 1 wherein the dielectric substrate is made of FR4 and has a dielectric constant of 4.4.

3. The multi-band microstrip antenna according to claim 1 wherein said metal feed has an impedance of 50 ohms.

4. The multi-frequency microstrip antenna of claim 1 wherein the dielectric substrate has a length, a width and a thickness of 83.765mm x 60mm and 1.6mm.

5. The multi-band microstrip antenna according to claim 1 wherein the radiator comprises three rectangular blocks, wherein the large rectangular block has a length and a width of 60 x 38.765mm; the length and width of the vertical rectangular block are 30 multiplied by 2.98mm; the transverse rectangular blocks have a length and width of 18 x 10mm.

6. The multi-frequency microstrip antenna of claim 1, wherein the single U-shaped metal cylinder has a distribution interval of 2mm, each metal cylinder has a diameter of 1mm, all the metal cylinders are in a shape of "U" arranged transversely, and have an opening facing inward, wherein the distance between the metal cylinders at the upper and lower sides and the edge of the metal patch at the upper and lower sides is 2mm, and the distance between the metal cylinder at the right side and the edge of the metal patch at the right side is 3mm.