CN217983676U - Multi-frequency microstrip antenna with U-shaped patch and one-shaped groove combined - Google Patents
Multi-frequency microstrip antenna with U-shaped patch and one-shaped groove combined Download PDFInfo
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- CN217983676U CN217983676U CN202222350170.5U CN202222350170U CN217983676U CN 217983676 U CN217983676 U CN 217983676U CN 202222350170 U CN202222350170 U CN 202222350170U CN 217983676 U CN217983676 U CN 217983676U
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Abstract
The invention discloses a multi-frequency microstrip antenna combining a U-shaped patch and a groove, which adopts a microstrip antenna slotting technology and realizes the requirement of multi-frequency points through different size grooves; specifically, a linear slot is formed in a metal patch between two dielectric plates, so that the distribution of current is changed, two relatively independent current loops are formed, and a plurality of resonant frequency points are introduced, so that the microstrip antenna can effectively generate microwave signals in a plurality of frequency bands; meanwhile, the current on the metal patch carries out coupling feed to the U-shaped metal patch paved on the upper dielectric plate, so that a plurality of resonant frequencies are excited on the U-shaped metal patch. The single metal patch radiator is used to realize the work of a one-shaped slot and a U-shaped metal patch dual-resonance structure, thereby effectively achieving the purpose of multi-frequency work. The antenna has the advantages of simple structure, small volume and easy manufacture.
Description
Technical Field
The utility model belongs to the technical field of light microstrip antenna, more specifically say, relate to a multifrequency microstrip antenna that U type paster and a type groove 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 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 U type paster and a type groove combine, realizes that microstrip antenna produces a plurality of frequency channels through "U" type metal patch and "a" grooved compound mode of type.
In order to achieve the above object, the present invention provides a multi-frequency microstrip antenna with a 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 a 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 plate is arranged right above the metal patch, and a U-shaped metal patch is attached to the center of the front surface of the three-dimensional dielectric plate; and a metal feeder is arranged in the center of the vertical direction of the first 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 a U-shaped patch and a one-shaped groove, which adopts a microstrip antenna slotting technology and realizes the requirement of multi-frequency points through different size grooves; specifically, a linear slot is formed in a metal patch between two dielectric plates, so that the distribution of current is changed, two relatively independent current loops are formed, and a plurality of resonant frequency points are introduced, so that the microstrip antenna can effectively generate microwave signals in a plurality of frequency bands; meanwhile, the current on the metal patch carries out coupling feed to the U-shaped metal patch paved on the upper dielectric plate, so that a plurality of resonant frequencies are excited on the U-shaped metal patch. The single metal patch radiator is used to realize the work of the double resonance structure of the 'one' -shaped slot and the 'U' -shaped metal patch, thereby effectively achieving the purpose of multi-frequency work. The antenna has the advantages of simple structure, small volume and easy manufacture.
Drawings
FIG. 1 is a schematic diagram of a multi-frequency microstrip antenna structure with U-shaped patch and 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 multi-frequency microstrip antenna structure combining a U-shaped patch and a slot.
In this embodiment, as shown in fig. 1, a multi-frequency microstrip antenna with a 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 feeder 4, a three-dimensional dielectric slab 5 and a U-shaped metal patch 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 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, and a U-shaped metal patch 6 is pasted in the center of the front surface of the three-dimensional dielectric plate 5; and a metal feeder 4 is arranged in the center of the vertical direction of the one-shaped groove, the metal feeder 4 is arranged on the front surface of the dielectric substrate, and one end of the metal feeder is connected with the metal patch.
In this embodiment, the dielectric substrate and the three-dimensional dielectric slab are both made of FR4 and have a dielectric constant of 4.4, wherein as shown in fig. 2, the dielectric substrate has a length, a width, and a thickness of L × W =77.765mm × 74.52mm, and is 1.6mm; the length and the width of the three-dimensional medium plate are L 3 ×W 3 33.26mm × 24mm, and a thickness of 3mm.
The impedance of the metal feed line is 50 ohms, and in this embodiment, a length of L is used 1 =17.45mm and width W 1 =1.16mm and length L 2 =15mm and width W 2 =2.98 mm.
The length and width of the rectangular metal patch are L 0 ×W 0 =37.26mm × 30.21mm, and the length and width of the one-shaped groove formed in the rectangular metal patch is L 5 ×W 5 ＝14mm×2mm；
The U-shaped metal patch can be seen as three rectangular metal patches, wherein the two metal patches in the vertical direction have the specific size L 4 X Wd =13mm x 2mm, and the specific size of the metal patch in the horizontal direction is W 4 X Wd =22mm x 2mm, in this embodiment we can also invert the arc at the junction of the three rectangular metal patches.
Fig. 3 shows the reflection coefficient of the multi-frequency microstrip antenna with U-shaped patch combined with a slot as a function of frequency.
In this embodiment, by simulating the multi-frequency microstrip antenna with the U-shaped patch combined with the one-slot, it can be seen from fig. 3 that the simulated return loss is lower than-10 dB in the frequency ranges of 5.63GHZ, 7.88GHZ, and 8.1-8.35GHZ, 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 (7)
1. The utility model provides a multifrequency microstrip antenna that 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 a 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 plate is arranged right above the metal patch, and a U-shaped metal patch is attached to the center of the front surface of the three-dimensional dielectric plate; and a metal feeder is arranged in the center of the vertical direction of the first 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 combined with a U-shaped patch and a slot according to claim 1, wherein the dielectric substrate and the three-dimensional dielectric plate are made of FR4 and 4.4 dielectric constant plates.
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 a thickness of 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 multi-band microstrip antenna according to claim 1 wherein said rectangular metal patch has a length and width of 37.26mm x 30.21mm.
6. The multi-band microstrip antenna of claim 1 wherein said one-slot is 14mm x 2mm long and wide.
7. The multi-band microstrip antenna of claim 1 wherein the U-shaped patch is formed 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 22mm x 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222350170.5U CN217983676U (en) | 2022-09-05 | 2022-09-05 | Multi-frequency microstrip antenna with U-shaped patch and one-shaped groove combined |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222350170.5U CN217983676U (en) | 2022-09-05 | 2022-09-05 | Multi-frequency microstrip antenna with U-shaped patch and one-shaped groove combined |
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| Publication Number | Publication Date |
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| CN217983676U true CN217983676U (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222350170.5U Active CN217983676U (en) | 2022-09-05 | 2022-09-05 | Multi-frequency microstrip antenna with U-shaped patch and one-shaped groove combined |
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| CN (1) | CN217983676U (en) |
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- 2022-09-05 CN CN202222350170.5U patent/CN217983676U/en active Active
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