CN217983681U

CN217983681U - Multi-frequency microstrip antenna embedded with multiple rectangular patches

Info

Publication number: CN217983681U
Application number: CN202222350258.7U
Authority: CN
Inventors: 孙昊进; 刘增星; 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 embedded with multiple rectangular patches, which comprises: 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 multi-rectangular metal patches are laid on the dielectric substrate, and then the microstrip antenna slotting technology is adopted, so that the slots are formed in each rectangular metal patch, the distribution of current is changed, a plurality of resonance structures are formed, the coupling effect among the antennas is improved, the working frequency range of the antennas is widened as far as possible, the antennas generate a plurality of frequency ranges, and the microstrip antenna slotting structure has the advantages of simple structure, small size and easiness in manufacturing.

Description

Multi-frequency microstrip antenna embedded with multiple rectangular patches

Technical Field

The utility model belongs to the technical field of light microstrip antenna, more specifically say, relate to a multifrequency microstrip antenna of embedded many rectangles paster.

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 harmonic principle 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, and when the frequency band exceeds three frequency bands or the branches with different lengths exceed three branches, the mutual interference between the branches will become large, and the performance of each frequency band of the antenna will become poor 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 of embedded many rectangles paster, through realize that microstrip antenna produces a plurality of frequency channels including slotting on the many rectangles metal paster of embedded formula.

In order to achieve the above object, the present invention provides a multi-frequency microstrip antenna embedded with multiple rectangular patches, which is characterized by comprising: the radiator, the dielectric substrate, the metal ground and the feeder line;

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 metal patch embedded with multiple rectangles on the front surface of the dielectric substrate to serve as a radiator of the antenna; and a metal feeder line connected with the metal patch is arranged in the direction vertical to 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 embedded with multiple rectangular patches, which comprises: 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 multi-rectangular metal patches are laid on the dielectric substrate, and then the microstrip antenna slotting technology is adopted, so that the slots are formed in each rectangular metal patch, the distribution of current is changed, a plurality of resonance structures are formed, the coupling effect among the antennas is improved, the working frequency range of the antennas is widened as far as possible, the antennas generate a plurality of frequency ranges, and the microstrip antenna slotting structure has the advantages of simple structure, small size and easiness in manufacturing.

Drawings

Fig. 1 is a schematic diagram of a multi-frequency microstrip antenna structure embedded with multiple rectangular patches;

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 multi-frequency microstrip antenna structure embedded with multiple rectangles.

In this embodiment, as shown in fig. 1, a multi-frequency microstrip antenna embedded with multiple rectangular patches according to the present invention includes: the antenna comprises a radiator 1, a dielectric substrate 2, a metal ground 3 and a feeder line 4;

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; the front surface of the dielectric substrate 2 is provided with a metal patch embedded with a plurality of rectangles and used as a radiator 1 of the antenna; a metal feeder 4 connected with the metal patch is arranged in the direction perpendicular to 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-frequency microstrip antenna embedded with the multiple rectangular patches are shown in fig. 2, and specific size values are shown in table 1;

name(s)	L0	L1	L2	W0	W1	W2	Wy	Wx
									Size of	30.21	17.45	15	37.26	1.16	2.98	7	9.17
Name (R)	dx1	dx2	dx3	dy1	dy2	dy3	dy4	H
									Size of	3	8	1	14.63	8.5	21	1.5	1.6

TABLE 1 (unit mm)

In this embodiment, the dielectric substrate is made of FR4 and has 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 impedance of the metal feeder is 50 ohms, and in this embodiment, the metal feeder is composed of two metal patches 19.555 × 1.16mm and 15 × 2.98mm in length and width.

The radiator 1 can be formed by metal patches of large and small rectangles, the length and width of the large rectangle is 37.26 multiplied by 30.21mm, and the length and width of the small rectangle is 21 multiplied by 8mm; the large rectangular metal patch is provided with a large rectangular groove and a small rectangular groove, the length and the width of the large rectangular groove are 29.26 multiplied by 3mm, and the length and the width of the small rectangular groove are 17 multiplied by 3mm; the small rectangular metal patch is also provided with two rectangular grooves with the same size, the length and the width of the two rectangular grooves are 9.17 multiplied by 7mm, the distance between the long side and the edge is 1mm, and the distance between the short side and the edge is 1.5mm.

Fig. 3 shows a curve of reflection coefficient of a multi-frequency microstrip antenna embedded with multiple rectangular patches along with frequency variation.

In this embodiment, by simulating a multi-frequency microstrip antenna embedded with multiple rectangular patches, it can be seen from fig. 3 that the simulated return loss is lower than-10 dB in frequency ranges of 3.7GHZ, 4.29 GHZ to 4.36GHZ, 5.91 GHZ to 6.10GHZ, 7.40 GHZ to 7.60GHZ, 8.10 GHZ to 8.48GHZ, and 8.68 GHZ to 8.93GHZ, 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 multifrequency microstrip antenna of embedded many rectangle patches which characterized in that includes: the radiator, the dielectric substrate, the metal ground and the feeder line;

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-frequency microstrip antenna with embedded multi-rectangular patches of claim 1 wherein the impedance of said metal feed is 50 ohms.

4. The multi-frequency microstrip antenna with embedded multi-rectangular patches as claimed in claim 1, wherein the dielectric substrate has a length, a width and a thickness of 77.765mm x 74.52mm and 1.6mm.

5. The multi-band microstrip antenna with embedded multi-rectangular patches as claimed in claim 1, wherein the radiator comprises two large and small rectangular metal patches located on the same plane, the large rectangular metal patch has a length and width of 37.26 × 30.21mm, the small rectangular metal patch has a length and width of 21 × 8mm, and there is no gap between the two rectangular metal patches; two parallel rectangular grooves are formed in the large rectangular metal patch, wherein the length and the width of each large rectangular groove are 29.26 multiplied by 3mm, and the length and the width of each small rectangular groove are 17 multiplied by 3mm; two rectangular grooves with the same size are formed in the horizontal direction of the small rectangular metal patch.