CN217983685U

CN217983685U - Multi-frequency microstrip antenna with concentric double-rectangular patch combination

Info

Publication number: CN217983685U
Application number: CN202222350324.0U
Authority: CN
Inventors: 潘亦康; 王禹; 杨阳
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 combined with concentric double-rectangular patches, which comprises two antenna radiation structures; wherein, a rectangular metal patch arranged at the center of the front surface of the dielectric substrate is used as an antenna radiation structure; in addition, a row of metal cylinder arrays distributed at equal intervals are arranged on one side close to the metal feeder in the three-dimensional dielectric slab, the metal cylinder arrays form a metal wall as a reflecting surface, the concentric double rectangular metal patches are used as radiating bodies and form a reflecting surface antenna structure together with the reflecting surface of the metal wall, and the two structures work in different frequency bands to achieve the purpose that the microstrip antenna generates multiple frequency bands.

Description

Concentric double-rectangular patch combined 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 two concentric rectangle patches combine.

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 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, 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 multifrequency microstrip antenna that two concentric rectangle pasters combine, realizes that microstrip antenna produces a plurality of frequency channels through big "rectangle" and little "rectangle" metal paster compound mode.

In order to achieve the above object, the present invention provides a multi-frequency microstrip antenna with a combination of concentric dual rectangular patches, comprising: the antenna comprises a radiator, a dielectric substrate, a metal ground, a feeder line, a three-dimensional dielectric plate and a concentric double rectangular 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 is arranged at the center of the front surface of the dielectric substrate and serves as a radiator; 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 concentric double rectangular metal patches consisting of large rectangles and small rectangles are sequentially pasted on the front side of the three-dimensional dielectric slab; and a metal feeder is arranged in the center of the direction perpendicular to the concentric double rectangular metal patches, the metal feeder is arranged on the front surface of the dielectric substrate, and one end of the metal feeder is connected with the metal patches.

The invention aims to realize the following steps:

the invention relates to a concentric double-rectangular patch combined multi-frequency microstrip antenna, which comprises two antenna radiation structures; wherein, a rectangular metal patch arranged at the center of the front surface of the dielectric substrate is used as an antenna radiation structure; in addition, a row of metal cylinder arrays distributed at equal intervals are arranged on one side, close to the metal feeder, of the three-dimensional dielectric plate, the metal cylinder arrays form a metal wall and serve as a reflecting surface, the concentric double rectangular metal patches serve as radiators and form a reflecting surface antenna structure together with the reflecting surface of the metal wall, and the two structures work in different frequency bands to achieve the purpose that the microstrip antenna generates multiple frequency bands.

Drawings

FIG. 1 is a schematic diagram of a concentric dual rectangular patch combined multi-frequency microstrip antenna structure;

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 concentric dual rectangular patch combined multi-frequency microstrip antenna.

In this embodiment, as shown in fig. 1, the present invention provides a concentric dual-rectangular patch combined multi-frequency microstrip antenna, including: 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 a concentric double rectangular 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 the dielectric substrate 2 to serve as a radiator 1; a three-dimensional dielectric plate 5 is arranged right above the metal patch, one side of the three-dimensional dielectric plate 5, which is close to the metal feeder 4, is provided with a row of metal cylinders which are distributed at equal intervals, and the front surface of the three-dimensional dielectric plate 5 is sequentially pasted with a concentric double rectangular metal patch 6 which consists of a large rectangle and a small rectangle, namely, the front surface of the three-dimensional dielectric plate 5 is pasted with the large rectangle metal patch firstly, and then the small rectangle metal patch is pasted on the large rectangle metal patch, but the large rectangle and the small rectangle metal patch are ensured to be concentric; a metal feeder 4 is arranged in the center of the direction perpendicular to the concentric double rectangular metal patches, the metal feeder 4 is arranged on the front face of the dielectric substrate 2, and one end of the metal feeder is connected with the metal patches.

In this embodiment, the size labels of the concentric dual-rectangular patch combined multi-frequency microstrip antenna are shown in fig. 2, and specific size values are shown in table 1;

name(s)	L0	L1	L2	L3	W0	W1
							Size of	30.21	17.45	15	24	46	1.16
Name(s)	W2	W3	Wd	H	d	dh
							Size of	2.98	33.26	2	1.6	1	10
Name (R)	dxx	dxx1	dyy	dyy1	LP
							Size of	8	5	13	8	6

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 are 92mm × 77.765mm, and the thickness is 1.6mm; the three-dimensional dielectric plate has a length and width of 46mm multiplied by 24mm and a thickness of 10mm.

The impedance of the metal feed line is 50 ohms, and in this embodiment, two metal patches with a length of 17.45mm, a width of 1.16mm, and a length of 15+9.105=24.105mm and a width of 2.98mm are used.

The length and width of the rectangular metal patch are 46mm multiplied by 6mm;

the double concentric rectangular metal patches have the length and width of a big rectangle of 26 multiplied by 8mm and the length and width of an inner rectangle of 16 multiplied by 2mm and are positioned on the front surface of the three-dimensional dielectric slab;

the centers of the metal cylinders in one row are 1mm away from the edge of the upper medium, the diameter of the metal cylinders is 1mm, the 16 cylinders are symmetrically distributed at equal intervals in the x axis, and the intervals are 2mm.

Fig. 3 shows the reflection coefficient of the multi-frequency microstrip antenna combined with the concentric double rectangular patches along with the frequency variation curve.

In this embodiment, by simulating the multi-frequency microstrip antenna combined with the concentric dual rectangular patches, it can be seen from fig. 3 that the simulated return loss is lower than-10 dB in the frequency ranges of 3.64GHZ, 5.45GHZ, 6.06GHZ, 6.72GHZ, and 10.97-12.52GHZ, 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. A multi-frequency microstrip antenna with a combination of concentric double rectangular patches, comprising: the antenna comprises a radiator, a dielectric substrate, a metal ground, a feeder line, a three-dimensional dielectric plate and a concentric double rectangular metal patch;

2. The multi-frequency microstrip antenna combined with the concentric double-rectangular patch according to claim 1 wherein the dielectric substrate and the three-dimensional dielectric plate are made of FR4 and 4.4 dielectric constant.

3. The multi-frequency microstrip antenna by combining concentric dual rectangular patches according to claim 1 wherein said metal feed line has an impedance of 50 ohms.

4. The multi-frequency microstrip antenna combined with concentric double rectangular patches according to claim 1, wherein the length and width of said dielectric substrate is 92mm x 77.765mm, and the thickness is 1.6mm; the three-dimensional dielectric slab has the length and width of 46mm multiplied by 24mm and the thickness of 10mm.

5. The multi-frequency microstrip antenna by combining the concentric dual rectangular patches according to claim 1, wherein the length and width of the rectangular metal patch is 46mm x 6mm.

6. The multi-frequency microstrip antenna combined with concentric double rectangular patches according to claim 1, wherein the center of the metal cylinder is 1mm away from the edge of the three-dimensional dielectric slab, the diameter thereof is 1mm, and the spacing thereof is 2mm.

7. The multi-frequency microstrip antenna combined with concentric double rectangular patches and the manufacturing method thereof as claimed in claim 1, wherein the length and width of the large rectangular metal patch is 26 x 8mm, and the length and width of the small rectangular metal patch is 16 x 2mm.