CN112886221A - Ultra-wideband double-trapped-wave antenna based on L-shaped matching branches - Google Patents
Ultra-wideband double-trapped-wave antenna based on L-shaped matching branches Download PDFInfo
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- CN112886221A CN112886221A CN202011591916.0A CN202011591916A CN112886221A CN 112886221 A CN112886221 A CN 112886221A CN 202011591916 A CN202011591916 A CN 202011591916A CN 112886221 A CN112886221 A CN 112886221A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
Abstract
The invention relates to an ultra-wideband double-notch antenna based on L-shaped matching branches, which comprises an intermediate medium substrate, a top layer radiation patch layer arranged on the upper surface of the intermediate medium substrate, and a bottom layer ground plate arranged on the lower surface of the intermediate medium substrate, wherein the top layer radiation patch layer, the intermediate medium substrate and the bottom layer ground plate are connected into an antenna whole, the top layer radiation patch layer is connected with a microstrip transmission line, L-shaped matching branches for realizing the notch characteristic of a WiMAX frequency band are symmetrically arranged on two sides of the top layer radiation patch layer, a right-angled U-shaped gap for realizing the notch characteristic of the WLAN frequency band is etched on one side of the top layer radiation patch layer close to the microstrip transmission line, and the top layer radiation patch layer is fed through the microstrip transmission line, so that the ultra-wideband double-notch antenna provided by the invention has better notch characteristic and can be cooperatively communicated with, the practicability is better.
Description
Technical Field
The invention relates to the technical field of ultra-wideband antennas, in particular to an ultra-wideband double-trapped wave antenna based on L-shaped matching branches.
Background
With the rapid development of mobile communication technology, the demand of the internet of things era on various data services is increased dramatically, higher requirements on modern wireless communication data storage capacity and information transmission speed are provided, and modern electronic equipment is developed towards miniaturization and integration. The ultra-wideband antenna is a necessary component of an ultra-wideband system, and has become a research hotspot in academia and business, but a wide-band system has various narrow-band systems such as WorldWide Microwave access (WorldWide Interoperability for Microwave access, WiMAX,3.3 to 3.6GHz), Wireless Local Area network (WLAN, 5.15 to 5.35GHz,5.725 to 5.825GHz), ITU (8-8.5GHz), C-band satellite (3.7 to 4.2GHz), and X-band satellite (7.25 to 7.75GHz), and signals of the narrow-band systems cause interference to the wide-band system and affect the stability of the wide-band system, so that the ultra-wideband antenna with high performance needs to be designed.
Rafaela designs an ultra-wideband antenna by a fractal iteration method on the basis of a rectangular structure, and then an H-shaped gap is etched in a microstrip line of the antenna, so that the wave trapping characteristic of a 5.15-5.82 GHz frequency band is realized. In 2017, an ultra-wideband antenna fed in a coplanar waveguide mode is designed in Yanghuchun, and then a metal strip is loaded on the bottom surface of a feeder line, so that the trap characteristic of a WLAN frequency band is realized. Nikitha Prem E K proposes a three-notch ultra-wideband antenna array, which adopts a slotting method and a resonator loading method at the same time, and etches a C-shaped groove and a D-shaped groove, and loads a split ring resonator on two sides of a microstrip line, wherein the C-shaped groove corresponds to a WiMAX frequency band, the resonator corresponds to a WLAN frequency band, and the U-shaped groove corresponds to the notch characteristic of a satellite band of 8.5 GHz.
The method for realizing the ultra-wideband antenna at present mainly comprises the following steps: the slot method, the loading of the resonator and the addition of the matching branch can enable the antenna to generate band-stop characteristics in corresponding frequency bands through a specific method or the mixture of multiple methods, thereby achieving the filtering effect. The structure of the antenna can be reasonably utilized by adopting a mixing method, and good trap wave characteristics are generated. Corresponding gaps are etched on the radiation patch through a traditional slotting method, although corresponding stop bands can be generated, due to the fact that the depth of trapped waves is not enough, impedance mismatch of the ultra-wideband antenna cannot be well generated, meanwhile, the utilization rate of the antenna structure is not high, and the gain in the corresponding frequency band is still high.
Disclosure of Invention
The invention aims to solve the technical problem of providing an ultra-wideband double-notch antenna based on L-shaped matching branches, which can form good notch characteristics in a WiMAX frequency band and a WLAN frequency band.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a two trapped wave antennas of ultra wide band based on L shape matching minor matters, including middle medium base plate, set up in the top layer of middle medium base plate upper surface radiates the SMD layer, and set up in the bottom ground plate of middle medium base plate lower surface, top layer radiates SMD layer, middle medium base plate and bottom ground plate and connects into an antenna whole, top layer radiates SMD layer and microstrip transmission line connection, top layer radiates SMD layer bilateral symmetry and is provided with the L shape matching minor matters that is used for realizing WiMAX frequency channel trapped wave characteristic, top layer radiates SMD layer and is close to microstrip transmission line one side etching has the right angle U-shaped gap that is used for realizing WLAN frequency channel trapped wave characteristic, top layer radiates SMD layer and passes through microstrip transmission line carries out the feed.
The width of L shape matching branch is 0.3mm, and long limit length is 12.2mm, and the minor face length is 1 mm.
The width of right angle U-shaped gap is 0.3mm, and long limit length is 6.6mm, and the minor face length is 6.4 mm.
The microstrip transmission line is a 50 omega rectangular microstrip transmission line with the length of 4.9mm and the width of 1.6 mm.
The thickness of the intermediate medium substrate is 1.6 mm.
The preparation material of the intermediate medium substrate is a material based on FR4 grade.
The top radiation patch layer is a hexagon which is bilaterally symmetrical along the center line.
The bottom layer grounding plate is a trapezoidal grounding plate which is bilaterally symmetrical along the center line.
Advantageous effects
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects: according to the invention, the L-shaped matching branch is arranged on the top-layer radiation patch, and the right-angled U-shaped gap is etched on one side, close to the microstrip transmission line, of the top-layer radiation patch layer, so that a good trap effect is achieved, the simulation bandwidth of the antenna is 2.13-14.32 GHz, the frequency band (3.1-10.6 GHz) required by the ultra-wideband antenna is met, and the antenna can be cooperatively communicated with a WLAN (wireless local area network) narrow-band system and a WiMAX (worldwide interoperability for microwave Access) narrow-band; in the frequency range of 4.91-5.855 GHz, the return loss characteristic parameters of S11 are all larger than-10, and the center of the notch frequency exceeds-5, so that the WLAN frequency band (5.125-5.825 GHz) is covered; in the frequency range of 7.127-8.15 GHz, the return loss characteristic parameters of S11 are all larger than-10, and the center of a notch frequency exceeds-6, so that the X-band satellite frequency band (7.25-7.75 GHz) is covered; the antenna of the invention has small size, and the simulation notch bandwidth is slightly larger than the required bandwidth, thereby allowing certain processing error.
Drawings
FIG. 1 is a schematic diagram of a dual notch antenna structure based on L-shaped matching branches according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an initial structure of an antenna according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an L-shaped matching branch in an embodiment of the invention;
FIG. 4 is a schematic view of a right angle U-shaped slot in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a simulated standing wave ratio curve for a dual notch antenna of an embodiment of the present invention;
FIG. 6 is a schematic diagram of a simulated gain curve for a dual notch antenna in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view of the radiation directions of the E-plane and the H-plane at 3GHz of the dual notch antenna of the embodiment of the present invention;
FIG. 8 is a schematic view of the radiation directions of the E-plane and the H-plane at 5GHz of the dual notch antenna of the embodiment of the present invention;
fig. 9 is a schematic view of the radiation directions of the E-plane and the H-plane at 8GHz of the dual notch antenna of the embodiment of the present invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The embodiment of the invention relates to an ultra-wideband double-notch antenna based on L-shaped matching branches, which comprises an intermediate medium substrate 1, a top layer radiation patch layer 2 arranged on the upper surface of the intermediate medium substrate 1, and a bottom ground plate 4 arranged on the lower surface of the middle dielectric substrate 1, wherein the top radiation patch layer 2, the middle dielectric substrate 1 and the bottom ground plate 4 are connected into an antenna whole, the top radiation patch layer 2 is connected with a microstrip transmission line 3, L-shaped matching branches 5 for realizing the trap characteristic of the WiMAX frequency band are symmetrically arranged at two sides of the top radiation patch layer 2, a right-angle U-shaped slit 6 for realizing the notch characteristic of the WLAN frequency band is etched on one side, close to the microstrip transmission line 3, of the top-layer radiation patch layer 2, and the top-layer radiation patch layer 2 feeds power through the microstrip transmission line 3.
Fig. 2 is a schematic view of an initial structure of an antenna according to an embodiment of the present invention, where the top radiation patch layer 2 is a hexagon which is bilaterally symmetric along a center line, the bottom ground plate 4 is a trapezoidal ground plate which is bilaterally symmetric along the center line, the microstrip transmission line 3 is a 50 Ω rectangular microstrip transmission line which is 4.9mm long and 1.6mm wide, the thickness of the middle dielectric substrate 1 is 1.6mm, and the middle dielectric substrate 1 is made of FR 4-grade-based material.
Fig. 3 is a schematic diagram of an L-shaped matching branch in the embodiment of the invention, wherein the width wn2 of the L-shaped matching branch 5 is 0.3mm, the length L3 of the long side is 12.2mm, and the length L4 of the short side is 1 mm.
Fig. 4 is a schematic diagram of a right-angled U-shaped slot according to an embodiment of the present invention, wherein the width wn1 of the right-angled U-shaped slot 6 is 0.3mm, the length L2 of the long side is 6.6mm, and the length L1 of the short side is 6.4 mm. In a high-frequency part of a broadband system, an actual trap effect is often not good enough, so that gain attenuation in a corresponding frequency band is not enough, and because current in the microstrip transmission line 3 is denser, a slot is etched on one side close to the microstrip transmission line 3 in the implementation mode, and because the current density is higher, a good trap characteristic is obtained more easily, the influence of the slot on the current is increased, and thus the trap depth is increased.
Fig. 5 is a schematic diagram of a simulated standing wave ratio curve of a dual-notch antenna according to an embodiment of the present invention, in which an abscissa represents frequency, an ordinate represents standing wave ratio, a columnar portion in fig. 5 is a notch frequency band obtained by simulation of the antenna according to the present invention, and a dotted line in the columnar portion is notch center frequency, and it can be seen from fig. 5 that a bandwidth of the dual-notch antenna according to the present invention effectively covers 3.1 to 10.6GHz required by an ultra-wideband frequency band, and simultaneously generates good notch characteristics in a WiMAX frequency band and a WLAN frequency band, the notch frequency band of WiMAX is 3.3 to 3.9GHz, the notch frequency band of WLAN is 4.91 to 5.85GHz, and both the notch frequency band and the notch frequency band effectively cover a frequency range required by the notch frequency band.
Fig. 6 is a schematic diagram of a simulated gain curve of a dual notch antenna according to an embodiment of the present invention, in which an abscissa represents frequency, and an ordinate represents peak gain, i.e., peak gain value, and it can be seen from fig. 6 that the gain of the antenna in the whole frequency band is flat, and good gain attenuation is formed in both WiMAX and WLAN, i.e., good notch characteristics are formed.
Fig. 7 is a schematic diagram of the radiation directions of the E-plane and the H-plane of the dual-notch antenna at 3GHz according to the embodiment of the present invention, and it can be seen from fig. 7 that the H-plane radiation pattern is circular, and the E-plane is in the classic 8-shape, which proves that the antenna has good omnidirectional radiation characteristics at 3 GHz.
Fig. 8 is a schematic diagram of the radiation directions of the E-plane and the H-plane of the dual-notch antenna at 5GHz according to the embodiment of the present invention, and it can be seen from fig. 8 that the H-plane radiation pattern is circular, and the E-plane is in the classic 8-shape, which proves that the antenna has good omnidirectional radiation characteristics at 5 GHz.
Fig. 9 is a schematic diagram of the radiation directions of the E-plane and the H-plane of the dual-notch antenna according to the embodiment of the present invention at 8GHz, and it can be seen from fig. 9 that the radiation characteristics of the antenna at the E-plane and the H-plane are attenuated at the frequency point of 8GHz, but still have omnidirectional radiation characteristics,
fig. 7, 8 and 9 show that the ultra-wideband antenna of the present embodiment has good radiation characteristics in the frequency band range of 3.1 to 10.6 GHz.
Therefore, the ultra-wideband double-notch antenna based on the L-shaped matching branch is designed by effectively utilizing the structure of the antenna, the antenna can have good notch characteristics by arranging the L-shaped matching branch and the right-angled U-shaped gap, and the ultra-wideband antenna provided by the invention has good radiation characteristics in the frequency band range of 3.1-10.6 GHz.
Claims (8)
1. The ultra-wideband double-notch antenna is characterized by comprising an intermediate medium substrate, a top radiation patch layer arranged on the upper surface of the intermediate medium substrate and a bottom ground plate arranged on the lower surface of the intermediate medium substrate, wherein the top radiation patch layer, the intermediate medium substrate and the bottom ground plate are connected into an antenna whole, the top radiation patch layer is connected with a microstrip transmission line, L-shaped matching branches for realizing the notch characteristic of the WiMAX frequency band are symmetrically arranged on two sides of the top radiation patch layer, the top radiation patch layer is close to one side of the microstrip transmission line, a right-angled U-shaped gap for realizing the notch characteristic of the WLAN frequency band is etched on one side of the microstrip transmission line, and the top radiation patch layer feeds power through the microstrip transmission line.
2. The ultra-wideband dual-notch antenna based on L-shaped matching stub as claimed in claim 1, wherein the width of the L-shaped matching stub is 0.3mm, the length of the long side is 12.2mm, and the length of the short side is 1 mm.
3. The L-shaped matching stub-based ultra-wideband dual-notch antenna as claimed in claim 1, wherein the width of the right-angle U-shaped slot is 0.3mm, the length of the long side is 6.6mm, and the length of the short side is 6.4 mm.
4. The L-shaped matching stub-based ultra-wideband dual-notch antenna as claimed in claim 1, wherein the microstrip transmission line is a 50 Ω rectangular microstrip transmission line with a length of 4.9mm and a width of 1.6 mm.
5. The L-shaped matching stub based ultra-wideband dual notch antenna as claimed in claim 1, wherein the thickness of the intermediate dielectric substrate is 1.6 mm.
6. The L-shaped matching stub-based ultra-wideband dual-notch antenna as claimed in claim 1, wherein the intermediate dielectric substrate is made of a material based on FR4 grade.
7. The L-shaped matching stub-based ultra-wideband dual-notch antenna as claimed in claim 1, wherein the top radiating patch layer is hexagonal with bilateral symmetry along a center line.
8. The L-shaped matching stub based ultra-wideband dual notch antenna as claimed in claim 1, wherein the bottom ground plate is a trapezoidal ground plate with bilateral symmetry along a center line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011591916.0A CN112886221A (en) | 2020-12-29 | 2020-12-29 | Ultra-wideband double-trapped-wave antenna based on L-shaped matching branches |
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| CN202011591916.0A CN112886221A (en) | 2020-12-29 | 2020-12-29 | Ultra-wideband double-trapped-wave antenna based on L-shaped matching branches |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113629390A (en) * | 2020-05-08 | 2021-11-09 | 阿尔卑斯阿尔派株式会社 | Antenna device |
| CN113644431A (en) * | 2021-08-17 | 2021-11-12 | 山东建筑大学 | Dual-band microstrip antenna loaded with rectangular resonance arm |
| CN113659343A (en) * | 2021-08-20 | 2021-11-16 | 歌尔科技有限公司 | Ultra-wideband microstrip antenna device and ultra-wideband microstrip antenna thereof |
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| CN113659343A (en) * | 2021-08-20 | 2021-11-16 | 歌尔科技有限公司 | Ultra-wideband microstrip antenna device and ultra-wideband microstrip antenna thereof |
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