CN217983679U

CN217983679U - Multi-frequency microstrip antenna with multi-branch patch and transverse metal cylinder combined

Info

Publication number: CN217983679U
Application number: CN202222350222.9U
Authority: CN
Inventors: 林展鹏; 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 a multi-branch patch and a transverse metal cylinder, wherein the multi-branch metal patch is laid on a bottom dielectric plate, and the multi-frequency resonance of the multi-branch structure antenna is realized by utilizing the harmonic characteristic; a row of metal cylinders distributed at equal intervals are transversely arranged in the upper three-dimensional dielectric slab to form a metal wall, and the front dielectric area and the rear dielectric area are separated. In the front and rear two regions, microstrips are used, and the two cut-offs are fed at different positions of the two regions. Due to the existence of the metal wall, the two dielectric regions form mutually independent resonant structures. The two resonant structures work at different resonant working points, so that the frequency points of the antenna are increased, and the antenna has the advantages of simple structure, small volume and easiness in manufacturing.

Description

Multi-frequency microstrip antenna with multi-branch patch and transverse metal cylinder combined

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 branching type paster and horizontal metal cylinder 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 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 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 many branching type paster and horizontal metal cylinder combine, realizes that microstrip antenna produces a plurality of frequency channels through many branching type metal paster and horizontal metal cylinder combination mode.

In order to achieve the above object, the present invention provides a multi-frequency microstrip antenna with a multi-branch patch combined with a transverse metal cylinder, comprising: the device comprises a radiator, a dielectric substrate, a metal ground, a feeder line, a three-dimensional dielectric plate and a metal cylinder;

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; arranging a multi-branch type metal patch as a radiator at the center of the front surface of the dielectric substrate; a three-dimensional dielectric slab is arranged right above the radiator, and a row of metal cylinders distributed at equal intervals are transversely arranged at the center of the three-dimensional dielectric slab; and a metal feeder is arranged in the center vertical to the distribution direction of the metal cylinders, is arranged on the front surface of the dielectric substrate, and has one end connected with the metal patch.

The invention aims to realize the following steps:

the invention relates to a multi-frequency microstrip antenna combining a multi-branch patch and a transverse metal cylinder, wherein the multi-branch metal patch is laid on a bottom dielectric slab, and multi-frequency resonance of the multi-branch structure antenna is realized by utilizing harmonic characteristics; a row of metal cylinders distributed at equal intervals are transversely arranged in the upper three-dimensional dielectric slab to form a metal wall, and the front dielectric area and the rear dielectric area are separated. In the front and rear two regions, microstrips are used, and the two cut-offs are fed at different positions of the two regions. Due to the existence of the metal wall, the two dielectric regions form mutually independent resonant structures. The two resonant structures work at different resonant working points, so that the frequency points of the antenna are increased, and the antenna has the advantages of simple structure, small volume and easiness in manufacturing.

Drawings

FIG. 1 is a schematic diagram of a multi-frequency microstrip antenna structure with multi-branch patches combined with transverse metal cylinders;

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 subject matter of the present invention.

Examples

Fig. 1 is a schematic diagram of a multi-frequency microstrip antenna structure in which a multi-branch patch is combined with a transverse metal cylinder.

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

the dielectric substrate 2 is a rectangular dielectric block, the bottom of the dielectric substrate 2 is metallized, and the dielectric substrate is used as a metal ground 3 of the multi-frequency microstrip antenna and is used for grounding; a multi-branch 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 slab 5 is arranged right above the radiator 1, and a row of metal cylinders 6 which are distributed at equal intervals are transversely arranged at the central position of the three-dimensional dielectric slab 5; and a metal feeder 4 is arranged in the center of the metal cylinder perpendicular to the distribution direction, the metal feeder 4 is arranged on the front surface of the dielectric substrate 2, and one end of the metal feeder is connected with the metal patch.

In this embodiment, the size labels of the multi-frequency microstrip antenna with the multi-branch patch combined with the transverse metal cylinder are shown in fig. 2, and specific size values are shown in table 1;

name (R)	LP	L0	L1	L2	L3	W0	W1	W2
									Size of	1.16	30.21	17.45	15	24	46	1.16	2.98
Name(s)	W3	Wd	H	d	dh	xf	left	right
									Size of	33.26	2	1.6	1	10	14	7	20
Name (R)	dyl	dyl1
									Size of	8	30

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 medium plate has a length and width of 33.26mm multiplied by 24mm and a thickness of 10mm.

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 multi-branch type metal patch consists of 5 rectangles, is positioned on the front surface of the three-dimensional dielectric slab, and has the left lower side with the length of a transverse short rectangle of 8mm and the width of 1.16mm, the length of a vertical rectangle of 7mm and the width of 1.16mm, and the length of a lowermost long rectangle of 46mm and the width of 1.16mm; the vertical rectangle at the upper right side is 20mm long and 1.16mm wide, and the horizontal rectangle is 30mm long and 1.16mm wide;

a row of metal cylinders is located at the y-axis, with a diameter of 1mm,16 cylinders equally spaced in x-axis symmetry and spaced 2mm apart.

Fig. 3 shows the reflection coefficient of the multi-frequency microstrip antenna combined by the multi-branch patch and the transverse metal cylinder along with the frequency variation curve.

In this embodiment, by simulating the multi-frequency microstrip antenna in which the multi-branch patch is combined with the transverse metal cylinder, it can be seen from fig. 3 that the simulated return loss is lower than-10 dB in the frequency ranges of about 6.79GHZ, about 7.38GHZ, about 8.72GHZ, and about 9.13-10GHZ, 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. A multi-frequency microstrip antenna with multi-branch patches combined with transverse metal cylinders, comprising: the device comprises a radiator, a dielectric substrate, a metal ground, a feeder line, a three-dimensional dielectric plate and a metal cylinder;

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; arranging a multi-branch metal patch as a radiator at the center of the front surface of the dielectric substrate; a three-dimensional dielectric plate is arranged right above the radiator, and a row of metal cylinders distributed at equal intervals are transversely arranged at the central position of the three-dimensional dielectric plate; and a metal feeder is arranged in the center vertical to the distribution direction of the metal cylinders, is arranged on the front surface of the dielectric substrate, and has one end connected with the metal patch.

2. The multi-frequency microstrip antenna combining a multi-branch patch and a transverse metal cylinder according to claim 1, wherein the dielectric substrate and the three-dimensional dielectric plate are made of a plate material with FR4 and a dielectric constant of 4.4.

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

4. The multi-band microstrip antenna of claim 1 wherein the dielectric substrate has a length, a width and a thickness of 92mm x 77.765mm and 1.6mm; the three-dimensional dielectric slab has the length and width of 33.26mm multiplied by 24mm and the thickness of 10mm.

5. The multi-band microstrip antenna according to claim 1 wherein said metal cylinders have a diameter of 1mm and a pitch of 2mm.

6. The multi-band microstrip antenna of claim 1 wherein the multi-branch patch is composed of 5 rectangular metal patches, the left lower side transverse short rectangular metal patch has a length and width of 8mm x 1.16mm, the vertical rectangular metal patch has a length and width of 7mm x 1.16mm, the lowermost long rectangular metal patch has a length and width of 46mm x 1.16mm, the right upper side vertical rectangular metal patch has a length and width of 20mm x 1.16mm, and the transverse rectangular metal patch has a length and width of 30m x 1.16mm.