CN217983689U

CN217983689U - Double-stereo multi-frequency microstrip antenna with metal cylinder array

Info

Publication number: CN217983689U
Application number: CN202222350701.0U
Authority: CN
Inventors: 林展鹏; 张光旻; 杨阳; 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 double three-dimensional multi-frequency microstrip antenna of a metal cylinder array.A rectangular groove is formed in the ground plane of a dielectric substrate, and a rectangular metal patch is arranged on an upper three-dimensional dielectric plate; the rectangular metal patch arranged on the upper three-dimensional dielectric plate, the dielectric plate and the floor form an upper resonator which is fed by a microstrip line; a metal cylinder array arranged in the lower three-dimensional dielectric plate and a ground plane jointly form a lower resonator, and the lower resonator feeds power through a rectangular groove; the upper resonator and the lower resonator work at different frequency points to form a plurality of resonant frequency points, so that the working frequency band of the antenna is widened, a plurality of frequency bands are generated by the microstrip antenna, and the microstrip antenna has the advantages of simple structure, small size and easiness in manufacturing.

Description

Double-stereo multi-frequency microstrip antenna with metal cylinder array

Technical Field

The utility model belongs to the technical field of light microstrip antenna, more specifically say, relate to a two three-dimensional multifrequency microstrip antenna of metal cylinder array.

Background

In wireless communication systems, antennas are an essential and important component. 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 used 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 is not enough, provides a two three-dimensional multifrequency microstrip antenna of metal cylinder array, realizes that microstrip antenna produces a plurality of frequency channels through the compound mode that sets up metal paster and metal cylinder array on the double-deck three-dimensional dielectric plate.

In order to achieve the above object, the present invention provides a dual three-dimensional multi-frequency microstrip antenna with a metal cylinder array, comprising: the device comprises a radiator, a dielectric substrate, a metal ground, a feeder line, an upper three-dimensional dielectric slab, a lower three-dimensional dielectric slab and a metal cylinder;

the medium substrate is a rectangular medium block, the bottom surface of the medium substrate is metallized firstly, and then a rectangular groove is formed in the center of the medium substrate and used as a metal ground of the multi-frequency microstrip antenna for grounding; a metal feeder is arranged on a center line perpendicular to the short side direction of the dielectric substrate, and the metal feeder is arranged on the front surface of the dielectric substrate; the metal feeder line structure is characterized in that a three-dimensional dielectric slab is arranged right above and below the rectangular groove respectively, the three-dimensional dielectric slab is marked as an upper three-dimensional dielectric slab and a lower three-dimensional dielectric slab, a rectangular metal patch is arranged at the center of the front of the upper three-dimensional dielectric slab, a row of horizontally placed metal cylinder arrays are arranged in the lower three-dimensional dielectric slab, the projection of the extension line of the metal feeder line on the lower three-dimensional dielectric slab is used as a symmetry axis, the metal cylinder arrays are symmetrically distributed relative to the projection line, and all metal cylinders penetrate through the lower three-dimensional dielectric slab.

The invention aims to realize the following steps:

the invention relates to a double three-dimensional multi-frequency microstrip antenna of a metal cylinder array.A rectangular groove is formed in the ground plane of a dielectric substrate, and a rectangular metal patch is arranged on an upper three-dimensional dielectric plate; the rectangular metal patch arranged on the upper three-dimensional dielectric plate, the dielectric plate and the floor form an upper resonator which is fed by a microstrip line; a metal cylindrical array arranged in the lower three-dimensional dielectric plate and a ground plane jointly form a lower resonator, and the lower resonator feeds power through a rectangular slot; the upper resonator and the lower resonator work at different frequency points to form a plurality of resonant frequency points, so that the working frequency band of the antenna is widened, a plurality of frequency bands are generated by the microstrip antenna, and the microstrip antenna has the advantages of simple structure, small size and easiness in manufacturing.

Drawings

Fig. 1 is a schematic diagram of a dual-stereo multi-frequency microstrip antenna structure of a metal cylindrical array;

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

Specific embodiments of the present invention are described below in conjunction with the accompanying drawings so that those skilled in the art can better understand the present invention. 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 main content of the present invention.

Examples

Fig. 1 is a schematic diagram of a dual-stereo multi-frequency microstrip antenna structure of a metal cylinder array.

In this embodiment, as shown in fig. 1, the dual stereo multi-frequency microstrip antenna of a metal cylinder array of the present invention includes: the device comprises a radiator 1, a dielectric substrate 2, a metal ground 3, a feeder 4, an upper three-dimensional dielectric slab 5, a lower three-dimensional dielectric slab 6 and a metal cylinder 7;

the dielectric substrate 2 is a rectangular dielectric block, the bottom surface of the dielectric substrate 2 is metallized firstly, and then a rectangular groove is formed in the central position of the dielectric substrate and is used as a metal ground 3 of the multi-frequency microstrip antenna for grounding; a metal feeder 4 is arranged on a center line perpendicular to the short side direction of the dielectric substrate 2, and the metal feeder 4 is arranged on the front surface of the dielectric substrate 2; set up a three-dimensional dielectric plate respectively directly over and under the rectangular channel, record as three-dimensional dielectric plate 5 and three-dimensional dielectric plate 6 down, the positive central point department of putting at last three-dimensional dielectric plate 5 sets up rectangular metal patch, as the irradiator 1 of antenna, set up the array that one row of horizontally arranged's metal cylinder 7 constitutes in three-dimensional dielectric plate 6 down, projection on three-dimensional dielectric plate 6 is as the symmetry axis under to the extension line of metal feeder 4, the metal cylinder array is about projection line symmetric distribution, and all metal cylinder 7 run through three-dimensional dielectric plate 2 down.

In this embodiment, the dimension labels of the dual stereo multi-frequency microstrip antenna of the metal cylindrical array are shown in fig. 2, and specific dimension values are shown in table 1;

name (R)	L0	L1	L2	L3	W0	W2
							Size of	30.21	17.45	15	38	30	2.98
Name (R)	WP	wd	d	dl	dh	LPK
							Size of	28	3	1	5	10	20
Name (R)	LP	LY	H	X	Y
							Size of	2	12	1.6	30	36

TABLE 1 (unit mm)

In this embodiment, referring to fig. 2 and table 1, it can be seen that the dielectric substrate, the upper three-dimensional dielectric slab and the lower three-dimensional dielectric slab are all made of a plate material with FR4 and a dielectric constant of 4.4; wherein, the length and width of the medium substrate are 77.765mm multiplied by 60mm, and the thickness is 1.6mm; the length and width of the upper three-dimensional dielectric slab are 24mm multiplied by 16mm, and the height is 5mm; the length and width of the lower three-dimensional medium plate are 36mm multiplied by 30mm, and the height is 10mm.

The impedance of the metal feeder is 50 ohms, and in this embodiment, the metal feeder is formed by metal patches formed by double rectangles with the length and width of 15 × 2.98mm and 38 × 2.98 mm.

The length and width of the metal ground are 77.765 multiplied by 60mm, and the length and width of the rectangular groove formed in the metal ground are 28 multiplied by 20mm; the length and width of the rectangular metal patch are 12mm × 2mm.

In this embodiment, as shown in fig. 1, a total of 17 metal cylinders are horizontally placed along the Y axis and symmetrically distributed about the X axis, the diameter d =1mm, the distance from the bottom surface of the lower three-dimensional dielectric slab is 2mm, the distance from the edge is 2mm, and the distance between the centers of the circles is 2mm.

Fig. 3 shows a curve of reflection coefficient of a dual stereo multi-frequency microstrip antenna of a metal cylinder array along with frequency variation.

In this embodiment, by simulating the dual stereo multi-frequency microstrip antenna with the metal cylindrical array, it can be seen from fig. 3 that the simulated return loss is lower than-10 dB in the frequency ranges of 1.45-1.61GHZ, 4.74-5.11GHZ, 6.88-7.77GHZ, and 9.47-13.87GHZ, thereby realizing that the same antenna generates multiple frequency bands simultaneously.

Although the illustrative embodiments of the present invention have been described in order to facilitate those skilled in the art to understand the present invention, it is to be understood that the present invention is not limited to the scope of the embodiments, and that 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 in the appended claims, and all matters of the invention using the inventive concepts are protected.

Claims

1. The utility model provides a two three-dimensional multifrequency microstrip antenna of metal cylinder array which characterized in that includes: the device comprises a radiator, a dielectric substrate, a metal ground, a feeder line, an upper three-dimensional dielectric slab, a lower three-dimensional dielectric slab and a metal cylinder;

the medium substrate is a rectangular medium block, the bottom surface of the medium substrate is metallized firstly, and then a rectangular groove is formed in the center of the medium substrate and used as a metal ground of the multi-frequency microstrip antenna for grounding; arranging a metal feeder on a center line perpendicular to the short side direction of the dielectric substrate, wherein the metal feeder is arranged on the front side of the dielectric substrate; the metal feeder line structure is characterized in that a three-dimensional dielectric slab is arranged right above and below the rectangular groove respectively, the three-dimensional dielectric slab is marked as an upper three-dimensional dielectric slab and a lower three-dimensional dielectric slab, a rectangular metal patch is arranged at the center of the front of the upper three-dimensional dielectric slab, a row of horizontally placed metal cylinder arrays are arranged in the lower three-dimensional dielectric slab, the projection of the extension line of the metal feeder line on the lower three-dimensional dielectric slab is used as a symmetry axis, the metal cylinder arrays are symmetrically distributed relative to the projection line, and all metal cylinders penetrate through the lower three-dimensional dielectric slab.

2. The dual three-dimensional multi-frequency microstrip antenna of claim 1 wherein the dielectric substrate, the upper three-dimensional dielectric plate and the lower three-dimensional dielectric plate are all made of plates with material FR4 and dielectric constant of 4.4; wherein, the length and width of the medium substrate are 77.765mm multiplied by 60mm, and the thickness is 1.6mm; the length and width of the upper three-dimensional dielectric slab are 24mm multiplied by 16mm, and the height is 5mm; the length and width of the lower three-dimensional medium plate are 36mm multiplied by 30mm, and the height is 10mm.

3. The dual three-dimensional multi-frequency microstrip antenna according to claim 1 wherein the impedance of said metal feed line is 50 ohms.

4. The dual stereo multi-frequency microstrip antenna of claim 1 wherein the rectangular slot has a length and a width of 28 x 20mm.

5. The dual three-dimensional multi-frequency microstrip antenna according to claim 1, wherein the diameter of the metal cylinder is 1mm, and the distance between adjacent metal cylinders is 2mm.

6. The dual stereo multi-frequency microstrip antenna of claim 1 wherein the rectangular metal patch has a length and a width of 12mm x 2mm.