CN217983687U

CN217983687U - Multi-frequency microstrip antenna combining inverted U-shaped patch and one-type groove

Info

Publication number: CN217983687U
Application number: CN202222350661.XU
Authority: CN
Inventors: 杨凯宇; 程凯扬; 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 combining an inverted U-shaped patch and a one-shaped groove, which realizes the requirement of multi-frequency points by adopting a multi-resonance area mode, and the antenna has three resonance areas: firstly, a 'one' -shaped slot is formed in a metal patch between two layers of dielectric plates, the distribution of current is changed, two relatively independent current loops are formed, and a plurality of resonance frequency points are introduced to form a resonance area; secondly, a row of metal cylinders distributed at equal intervals are arranged in the three-dimensional dielectric slab and close to one side of the metal feeder to form a metal wall, and a patch area on one side of the feeder is isolated from other areas to form an independent resonance area; thirdly, the inverted U-shaped metal patch forms a resonance area under the feeding of the metal patch; the multiple resonance structures introduce multiple resonance working points, so that the microstrip antenna can effectively generate microwave signals in multiple frequency bands.

Description

Multi-frequency microstrip antenna combining inverted U-shaped patch and one-type groove

Technical Field

The utility model belongs to the technical field of light microstrip antenna, more specifically say, relate to a multifrequency microstrip antenna that type of falling U paster and a type groove combine.

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 improved and improved, and for example, the multi-band of the antennas is a development trend and must be considered in the design process of the 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, in Design of Dual-band Filter for GSM and WLAN application published by Du Li Bo, a Dual-band antenna and a Dual-band Filter applied to a Dual-band GSM communication system and a Dual-band WLAN communication system are designed. 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 to form different resonant current paths, 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 is not enough, provides a multifrequency microstrip antenna that type of falling U paster and a type groove combine, realizes that microstrip antenna produces a plurality of frequency channels through the compound mode of "U" type metal patch and "a" type fluting.

In order to achieve the above object, the present invention provides a multi-frequency microstrip antenna with an inverted U-shaped patch combined with a slot, comprising: the antenna comprises a radiator, a dielectric substrate, a metal ground, a feeder line, a three-dimensional dielectric plate and an inverted U-shaped metal patch;

the dielectric substrate is a rectangular dielectric block, and the bottom of the dielectric substrate is metallized and used as a metal ground of the multi-frequency microstrip antenna for grounding; a rectangular metal patch serving as a radiator is arranged at the center of the front surface of the dielectric substrate, and a 'straight' groove serving as a main radiation part of the antenna is arranged at the center of the metal patch; a three-dimensional dielectric slab is arranged right above the metal patch, a row of metal cylinders distributed at equal intervals are arranged in the three-dimensional dielectric slab and close to one side of the metal feeder, and an inverted U-shaped metal patch is arranged on the front side of the three-dimensional dielectric slab; and a metal feeder is arranged in the center of the vertical direction of the one-shaped groove, is arranged on the front surface of the dielectric substrate, and is connected with the metal patch at one end.

The invention aims to realize the following steps:

the invention relates to a multi-frequency microstrip antenna combining an inverted U-shaped patch and a one-shaped groove, which realizes the requirement of multi-frequency points by adopting a multi-resonance area mode, and the antenna has three resonance areas: firstly, a 'one' -shaped slot is formed in a metal patch between two layers of dielectric plates, the distribution of current is changed, two relatively independent current loops are formed, and a plurality of resonance frequency points are introduced to form a resonance area; secondly, a row of metal cylinders distributed at equal intervals are arranged in the three-dimensional dielectric slab close to one side of the metal feeder to form a metal wall, and a patch area on one side of the feeder is isolated from other areas to form an independent resonance area; thirdly, the inverted U-shaped metal patch forms a resonance area under the feeding of the metal patch; the multiple resonance structures introduce multiple resonance working points, so that the microstrip antenna can effectively generate microwave signals in multiple frequency bands.

Drawings

FIG. 1 is a schematic diagram of a multi-frequency microstrip antenna structure with an inverted U-shaped patch combined with a slot;

fig. 2 is a schematic size diagram of the multi-frequency microstrip antenna shown in fig. 1;

fig. 3 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 structure of a multi-frequency microstrip antenna with an inverted U-shaped patch combined with a slot.

In this embodiment, as shown in fig. 1, a multi-frequency microstrip antenna with an inverted U-shaped patch combined with a slot according to the present invention includes: the antenna comprises a radiator 1, a dielectric substrate 2, a metal ground 3, a metal feeder 4, a three-dimensional dielectric slab 5 and an inverted U-shaped metal patch 6;

the dielectric substrate 2 is a rectangular dielectric block, and the bottom of the dielectric substrate 2 is metallized to be used as a metal ground 3 of the multi-frequency microstrip antenna for grounding; a rectangular metal patch is arranged at the center of the front surface of a dielectric substrate 2 to serve as a radiator 1, and a 'straight' groove is arranged at the center of the metal patch to serve as a main radiation part of an antenna; a three-dimensional dielectric plate 5 is arranged right above the metal patch, a row of metal cylinders distributed at equal intervals are arranged on one side, close to the metal feeder, in the three-dimensional dielectric plate 5, and an inverted U-shaped metal patch 6 is arranged in the center of the front surface of the three-dimensional dielectric plate 5; and a metal feeder is arranged in the center of the vertical direction of the one-shaped groove, is arranged on the front surface of the dielectric substrate, and is connected with the metal patch at one end.

In this embodiment, the size labels of the multi-frequency microstrip antenna with the inverted U-shaped patch combined with the one-shaped groove are shown in fig. 2, and specific size values are shown in table 1;

name (R)	L	L0	L1	L2	L3	W	W0
								Size of	77.765	30.21	17.45	15	24	74.52	37.26
Name (R)	W1	W2	W3	Wd	H	d	dh
								Size of	1.16	2.98	33.26	2	1.6	1	3
Name (R)	dxl	dxx	dyy	dyl	dxx1
								Size of	9	3	11	7	13

TABLE 1 (unit mm)

In this embodiment, the dielectric substrate and the three-dimensional dielectric slab are made of FR4 and have 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 77.765mm × 74.52mm, and the thickness is 1.6mm; the three-dimensional dielectric plate has a length and width of 33.26mm multiplied by 24mm and a thickness of 3mm.

The impedance of the metal feeder line is 50 ohms, and in this embodiment, two metal patches with a length of 17.45mm and a width of 1.16mm, and a length of 15mm and a width of 2.98mm are used.

The length and width of the rectangular metal patch is 37.26mm multiplied by 30.21mm, and the length and width of a 'one' groove formed in the rectangular metal patch is 14mm multiplied by 2mm;

the inverted "U" shaped metal patch can be regarded as three rectangular metal patches, wherein the length and width of two metal patches in the vertical direction is 13mm × 2mm, and the length and width of a metal patch in the horizontal direction is 18mm × 2mm.

Fig. 3 shows the reflection coefficient of the multi-frequency microstrip antenna combining the inverted U-shaped patch and a slot as a function of frequency.

In this embodiment, by simulating the multi-frequency microstrip antenna in which the inverted U-shaped patch is combined with the one-shaped slot, it can be seen from fig. 3 that the simulated return loss is lower than-10 dB in the frequency ranges of about 3.68GHZ, about 5.42GHZ, and 8.11-9.74GHZ, thereby realizing that the same antenna generates multiple frequency bands simultaneously.

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 multifrequency microstrip antenna that inverted U type paster and a type groove combine which characterized in that includes: the antenna comprises a radiator, a dielectric substrate, a metal ground, a feeder line, a three-dimensional dielectric plate and an inverted U-shaped metal patch;

the dielectric substrate is a rectangular dielectric block, and the bottom of the dielectric substrate is metallized and used as a metal ground of the multi-frequency microstrip antenna for grounding; a rectangular metal patch serving as a radiator is arranged at the center of the front surface of the dielectric substrate, and a 'straight' groove serving as a main radiation part of the antenna is arranged at the center of the metal patch; a three-dimensional dielectric slab is arranged right above the metal patch, a row of metal cylinders distributed at equal intervals are arranged in the three-dimensional dielectric slab and close to one side of the metal feeder, and an inverted U-shaped metal patch is arranged at the center of the front surface of the three-dimensional dielectric slab; and a metal feeder is arranged in the center of the vertical direction of the one-shaped groove, is arranged on the front surface of the dielectric substrate, and is connected with the metal patch at one end.

2. The multi-frequency microstrip antenna according to claim 1, wherein the dielectric substrate and the solid dielectric slab are made of a board material having FR4 and 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 77.765mm x 74.52mm, and 1.6mm; the three-dimensional dielectric slab has the length and width of 33.26mm multiplied by 24mm and the thickness of 3mm.

5. The microstrip antenna according to claim 1 wherein the rectangular metal patch has a length of 37.26mm x 30.21mm.

6. The multi-band microstrip antenna according to claim 1 wherein the distance between the center of said metal cylinder and the edge of said three-dimensional dielectric slab is 1mm, its diameter is 1mm, and its spacing is 2mm.

7. The microstrip antenna according to claim 1 wherein the inverted U-shaped patch is composed of three rectangular metal patches, wherein the two metal patches in the vertical direction have a length and width of 13mm x 2mm, and the metal patch in the horizontal direction have a length and width of 18mm x 2mm.