CN112216971A - Miniaturized double-trapped wave ultra-wideband antenna - Google Patents
Miniaturized double-trapped wave ultra-wideband antenna Download PDFInfo
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- CN112216971A CN112216971A CN202011079087.8A CN202011079087A CN112216971A CN 112216971 A CN112216971 A CN 112216971A CN 202011079087 A CN202011079087 A CN 202011079087A CN 112216971 A CN112216971 A CN 112216971A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/25—Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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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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Abstract
The invention discloses a miniaturized double-trapped wave ultra-wideband antenna which comprises a dielectric substrate, a radiation patch, a microstrip feeder line and a truncated ground plate, wherein the radiation patch and the microstrip feeder line are printed on the front surface of the dielectric substrate, and the truncated ground plate is printed on the back surface of the dielectric substrate; the radiation patch adopts a rectangular basic pattern, symmetrical quarter circle cutting angles are formed at the left lower part and the right lower part, and a rectangular groove is formed in the middle of the upper part; the microstrip feeder line is connected with the bottom of the radiation patch; the top of the semicircular grounding plate is provided with a rectangular groove. The combination of the radiation patch and the ground plate widens the bandwidth of the antenna; the radiation patch and the grounding plate are provided with the grooves to generate the stop band, so that the interference of different narrow-band signals is effectively filtered, the mutual compatible cooperative communication of the ultra-wideband system and other narrow-band communication systems is realized, and the ultra-wideband antenna has the advantages of simple structure, good radiation characteristic and strong anti-interference capability, and has omnidirectional radiation characteristic in the frequency band of the pass band.
Description
Technical Field
The invention belongs to the technical field of wireless communication, and particularly relates to a miniaturized ultra-wideband antenna with double-notch characteristics.
Background
In recent years, wireless communication technology is increasingly developed and updated along with the demands of people on work and life, the development trend of miniaturization, low cost and high efficiency of terminal equipment is gradually highlighted, and the antenna is bound to move towards the targets of miniaturization and broadband. The ultra-wideband technology has the advantages of high transmission rate, low power consumption, high resolution and the like, and is widely applied to the fields of radar remote sensing and military communication. The united states Federal Communications Commission (FCC) was established as an independent agency of the united states government in 1934, and since the FCC divided the 3.1 to 10.6GHz ultra-wideband band into the civil communication field in 2002, the ultra-wideband communication technology became a major research subject in the academic world and the wireless communication field. The ultra-wideband antenna is used as a core component of a system, and the transmission quality of the whole system is directly influenced by the performance of the ultra-wideband antenna.
Because the frequency band occupied by the ultra-wideband system is very wide, many narrow-band communication systems are included, such as the C-band of 3.7-4.2GHz and the X-band of 7.25-7.75 GHz. These narrowband communication bands can strongly interfere with the proper operation of the ultra-wideband system. In order to avoid the interference of these narrow-band signals, it is necessary to design an ultra-wideband antenna with a notch characteristic, and meanwhile, in order to meet the requirements of the current electronic products for increasingly miniaturization and portability, it is a research hotspot at home and abroad to realize the miniaturization design of the ultra-wideband antenna.
In order to avoid electromagnetic interference between the ultra-wideband system and the narrow-band system, the conventional method is to introduce a band-stop filter into the ultra-wideband system, but this will certainly increase the volume, design complexity and cost of the system. At present, the simplest method for solving the problem of filtering narrow-band signals by an antenna is to use an ultra-wideband antenna with a trapped wave characteristic, and mainly adopt a slotting method, an adding branch method, a parasitic element method and the like. For example, reference "Xuqiong, Fangguan, Huyanwen, strict, Queen, ultra-wideband antenna with adjustable dual-frequency notch [ J]The piezoelectric and acousto-optic antenna 2019,41(02):173-The structure of the monopole antenna is used as a radiation unit, the ultra-wideband characteristic is improved by etching an I-shaped gap on a grounding plate, and then a C-shaped gap is etched on the surface of the radiation unit, so that the dual-trapped wave characteristic of the ultra-wideband antenna is realized, and the overall size of the antenna is 35 x 38 x 1.6mm3However, the antenna only filters the interference of narrow-band signals of two frequency bands of WiMAX and X bands, and has larger physical size.
And as another Chinese patent with the patent name of a small double-notch ultra-wideband antenna and the application number of CN201711257852.9, the small double-notch ultra-wideband antenna is provided, the antenna consists of a rectangular radiation patch corner cut, a rectangular micro-strip feeder line and a rectangular corner cut ground plane, and the double-notch characteristic is generated by a method of forming a U-shaped groove on a circular radiation patch, wherein the physical size of the antenna is 31 x 22 x 1.5mm3Also, the physical size is large and not easy to integrate.
Disclosure of Invention
Based on the defects of the prior art, the technical problem to be solved by the invention is to provide the ultra-wideband antenna with the double-notch characteristic, which has the advantages of simple structure, small size and stable performance, and can filter the interference of different narrow-band signals.
In order to solve the technical problems, the invention is realized by the following technical scheme: the invention provides a miniaturized double-trapped wave ultra-wideband antenna which comprises a dielectric substrate, a radiation patch, a microstrip feeder line and a semicircular grounding plate, wherein the radiation patch and the microstrip feeder line are printed on the front surface of the dielectric substrate, and the semicircular grounding plate is printed on the back surface of the dielectric substrate; the radiation patch is of a rectangular structure, quarter circle cutting corners are symmetrically formed on two sides of the bottom of the radiation patch, and a rectangular groove is dug in the top of the radiation patch; the microstrip feeder line is connected with the bottom of the radiation patch; the middle part of the semicircular grounding plate is provided with a rectangular groove.
Therefore, the improved rectangular structure is adopted as the radiation patch, the miniaturization of the ultra-wideband antenna is realized, the interference of different narrow-band signals can be filtered, and the mutual compatible cooperative communication of the ultra-wideband system and other narrow-band communication systems is realized. The invention has the advantages of miniaturization, simple structure, good radiation characteristic, strong anti-interference capability and the like.
Optionally, a U-shaped narrow gap is etched below the rectangular groove.
In the method, an improved rectangular structure is adopted as a radiation patch, and the characteristics of small occupied space and easiness in improvement of the monopole antenna are utilized to effectively expand the bandwidth of the antenna and reduce the size of the antenna; the rectangular groove is formed in the radiation patch, so that the bandwidth of the low frequency band of the antenna can be expanded, and manufacturing materials are saved; etching the U-shaped narrow slot can produce stop band characteristics and flexibly adjust the center frequency and bandwidth of the notch by adjusting the horizontal length and vertical length of the U-shaped narrow slot.
Furthermore, the rectangular groove is positioned at the middle upper part of the grounding plate and is positioned right below the microstrip feeder line, and the length of the irregular groove is 5.0-5.4 mm.
Optionally, the horizontal length of the rectangular groove is 5.0-5.4mm, and the vertical length is 5.8-6.2 mm. The radius of the first chamfer part is 4.17-4.21 mm.
Further, the horizontal length of the U-shaped narrow gap is 14.8-15.2mm, and the vertical length of the U-shaped narrow gap is 5.9-6.3 mm; the horizontal length of the inverted U-shaped groove is 5.8-6.2mm, and the vertical length of the inverted U-shaped groove is 3.8-4.2 mm.
Optionally, the microstrip feed line is a microstrip feed line with a characteristic impedance of 50 Ω, the length of the microstrip feed line is 10.5-10.9mm, and the width of the microstrip feed line is 1.2 mm.
Therefore, the inverted U-shaped groove is formed in the radiating patch to generate a second trapped wave frequency band, good trapped wave characteristics are achieved by adjusting parameters such as the width and the length of the inverted U-shaped groove and the distance between the inverted U-shaped groove and the feed port, and the adjusting process is flexible. In addition, the method for etching the U-shaped narrow gap and opening the inverted U-shaped groove generates trap characteristics, has a simple structure, replaces filter design, reduces design cost and complexity, is convenient to process and is convenient to produce.
Therefore, the improved ground plate structure is adopted, and the rectangular groove is formed in the middle upper portion of the ground plate, the structure can generate gradual change resonance characteristics, so that the antenna generates stable transition from one resonance mode to another resonance mode, and the performance of the antenna is further improved.
Optionally, the thickness of the dielectric substrate is 1mm, and the length and the width of the dielectric substrate are 25mm and 18mm, respectively.
Therefore, the planar structure is adopted, the size is small, the structure is compact, and the integration with the radio frequency front-end circuit is convenient to realize.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following detailed description is given in conjunction with the preferred embodiments, together with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
Fig. 1 is a block diagram of a miniaturized dual notch ultra-wideband antenna in accordance with a preferred embodiment of the present invention;
fig. 2 is a front structural view of a miniaturized dual-notch ultra-wideband antenna of the present invention;
fig. 3 is a back structural view of a miniaturized dual notch ultra-wideband antenna of the present invention;
FIG. 4 is a return loss plot of a miniaturized dual notch ultra-wideband antenna of the present invention;
FIG. 5 is a radiation pattern of a miniaturized double-notch ultra-wideband antenna of the present invention at a frequency point of 5 GHz;
FIG. 6 is a radiation pattern of the miniaturized ultra-wideband antenna with double notch characteristics of the present invention at a frequency point of 8 GHz;
fig. 7 shows the radiation pattern of the miniaturized ultra-wideband antenna with double notch characteristics at the frequency point of 11 GHz.
Detailed Description
Other aspects, features and advantages of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which form a part of this specification, and which illustrate, by way of example, the principles of the invention. In the referenced drawings, the same or similar components in different drawings are denoted by the same reference numerals.
As shown in fig. 1 to 7, the miniaturized dual-notch ultra-wideband antenna of the present invention comprises a dielectric substrate 10, a radiation patch 20, a microstrip feeder 30 and a semicircular ground plate 40, wherein the radiation patch 20 and the microstrip feeder 30 are printed on the front surface of the dielectric substrate 10, and the semicircular ground plate 40 is printed on the back surface of the dielectric substrate 10. As shown in fig. 1, the radiation patch 20 has a rectangular structure with a quarter circle corner 21 at the bottom and a rectangular groove 22 at the top. The quarter circle corner 21 has a radius of 4.17-4.21mm, preferably 4.19 mm. The rectangular recess 22 is located on the axis of the radiating patch 20 and has a horizontal length of 5.0-5.4mm, preferably 5.2mm, and a vertical length of 5.8-6.2mm, preferably 6 mm. A U-shaped narrow slit 23 and an inverted U-shaped groove 24 are etched in the radiation patch 20 as shown in fig. 2. The U-shaped narrow gap 23 is located at the central axis of the middle upper part of the radiation patch 20, the width of the U-shaped narrow gap 23 is 0.23-0.27mm, preferably 0.25mm, the horizontal length of the lower part is 14.8-15.2mm, preferably 15mm, and the vertical length of the two sides of the upper part is 5.9-6.3mm, preferably 6.1 mm.
The bottom of the radiating patch 20 is connected to a microstrip feed line 30 having a characteristic impedance of 50 Ω, and the microstrip feed line 30 has a length of 10.5-10.9mm, preferably 10.7mm, and a width of 1.2 mm.
A semicircular grounding plate 40 with a rectangular groove 41 at the top is printed on the lower side of the back surface of the dielectric substrate 10 as shown in fig. 3, the semicircular grounding plate 40 has a radius of 9mm, and the rectangular groove 41 is located on the central axis of the semicircular grounding plate 40 and has a horizontal length of 1.8-2.2mm, preferably 2 mm. The vertical length is 5.0-5.4mm, preferably 5.4 mm. The provision of the rectangular recess 41 improves the impedance matching characteristics of the antenna. The adoption of the structure of the semicircular grounding plate 40 can generate gradual-change resonance characteristics, so that the antenna generates smooth transition from one resonance mode to another resonance mode, and the performance of the antenna is further improved.
The ultra-wideband antenna in the embodiment is printed on a dielectric substrate 10 made of FR4 epoxy resin material with the length, width and thickness of 25mm, 18mm and 1mm respectively, and the relative dielectric constant of the dielectric substrate 10 is 4.4.
In order to further illustrate the good performance of the ultra-wideband antenna with the double-notch characteristic, the invention is subjected to modeling simulation of the radio frequency characteristic by using an electromagnetic simulation software HFSS 15.0.
Referring to fig. 4, the ultra-wideband antenna of the invention has a bandwidth of 3.1-15.0GHz with a return loss less than-10 dB, completely meets the ultra-wideband frequency band range specified by FCC, generates better notch characteristics in the frequency bands of 3.6-4.3GHz and 7.0-7.8 GHz, and can effectively filter electromagnetic interference caused by two narrow-band signals of international satellite band and X band.
Referring to fig. 5, a radiation pattern of the ultra-wideband antenna at 5GHz in the embodiment of the present invention is provided, and as can be seen from fig. 5, an E-plane pattern of the antenna exhibits directional radiation in the shape of a "8", and an H-plane pattern of the antenna is approximately circular, and exhibits an omnidirectional radiation characteristic.
Referring to fig. 6, a radiation pattern of the ultra-wideband antenna in the embodiment of the present invention at 8GHz is provided, and as can be seen from fig. 6, an E-plane pattern of the antenna exhibits directional radiation in the shape of a "8", and an H-plane pattern of the antenna is approximately circular, and exhibits an omnidirectional radiation characteristic.
Referring to fig. 7, a radiation pattern of the ultra-wideband antenna at 11GHz in the embodiment of the present invention is provided, and as can be seen from fig. 7, an E-plane pattern of the antenna exhibits directional radiation in the shape of a "8", an H-plane pattern of the antenna is approximately circular, and exhibits an omnidirectional radiation characteristic, and the antenna has a good omnidirectional radiation characteristic in the entire passband frequency band.
The simulation analysis shows that the bandwidth of the antenna is 3.1-15.0GHz, the working bandwidth completely meets the ultra-wideband frequency range of 3.1-10.6GHz, the antenna has better stop band characteristics in two frequency bands of 3.6-4.3GHz and 7.0-7.8 GH, can simultaneously filter electromagnetic interference generated by two narrow-band communication systems of a C-band (3.7-4.2GHz) and an X-band (7.25-7.75 GHz), and has basically stable peak gain and omnidirectional radiation characteristics in a pass band, so that the antenna has higher practical value.
The dual-notch ultra-wideband antenna disclosed by the embodiment has the advantages of being small in size, simple in structure, good in radiation characteristic, strong in anti-interference capability, stable in performance and the like, the monopole antenna structure is adopted as the radiation patch 20, the ultra-wideband antenna is small in size, the stop band is generated by etching the U-shaped narrow gap 23 and the inverted U-shaped groove 24, interference of two kinds of narrow-band signals of a C-band and an X-band is filtered, and mutual compatibility and cooperative communication of an ultra-wideband system and other narrow-band communication systems are achieved. In addition, by adjusting the horizontal and vertical lengths of the U-shaped narrow gap 23 and the parameters of the inverted U-shaped groove 24, the center frequency and the bandwidth of the trapped wave can be flexibly adjusted, and the trapped wave adjusting characteristic is achieved. The corners of the two sides of the rectangle are adopted, the structure of the rectangular groove 22 dug at the top is used as the radiation patch 20, and the characteristics of small occupied space and easy improvement of the monopole antenna are utilized to effectively expand the bandwidth of the antenna and reduce the size of the antenna. The U-shaped narrow gap 23 is etched on the radiating patch 20, the current distribution characteristics of the surface of the antenna are changed to a great extent, and the low-frequency band bandwidth of the antenna is expanded while a trapped wave frequency band is generated. The antenna ground plate adopts a semicircular ground plate 40 structure, and the top of the ground plate is provided with a rectangular groove 41, so that the structure can generate gradual change resonance characteristics, and the antenna can generate stable transition from one resonance mode to another resonance mode, thereby further improving the performance of the antenna. In addition, the invention adopts the method of introducing the U-shaped narrow gap 23 and etching the inverted U-shaped groove 24 to generate the trapped wave characteristic, has simple structure, replaces the design of a filter, reduces the design cost and the complexity, is convenient to process and produce, adopts a planarization structure, has smaller size and compact structure, and is convenient to realize the integration with a radio frequency front-end circuit.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (9)
1. The utility model provides a miniaturized two trapped wave ultra wide band antennas, includes dielectric substrate (10), radiation paster (20), microstrip feeder (30) and semicircle ground plate (40), its characterized in that:
the radiation patch (20) and the microstrip feeder line (30) are printed on the front surface of the dielectric substrate (10), and the semicircular grounding plate (40) is printed on the back surface of the dielectric substrate (10);
the radiation patch (20) adopts a rectangular basic pattern, symmetrical quarter circle cutting corners (21) are arranged at the left lower part and the right lower part, and a rectangular groove (22) is arranged at the middle part above the symmetrical quarter circle cutting corners;
the microstrip feed line (30) is connected with the bottom of the radiation patch (20);
the middle part above the semicircular grounding plate (40) is provided with a rectangular groove (41).
2. A miniaturized, dual-notch, ultra-wideband antenna, as defined in claim 1, wherein: the middle part of the radiation patch (20) is provided with a U-shaped narrow gap (23), and an inverted U-shaped groove (24) is arranged below the narrow gap.
3. A miniaturized, dual-notch, ultra-wideband antenna, as defined in claim 2, wherein: the U-shaped narrow gap (23) is located at the central axis of the medium substrate (10), the width of the U-shaped narrow gap (23) is 0.23-0.27mm, the transverse length of the lower part is 14.8-15.2mm, and the vertical length of the two sides of the upper part is 5.9-6.3 mm.
4. A miniaturized, dual-notch, ultra-wideband antenna, as defined in claim 2, wherein: the inverted U-shaped groove (24) is located in the central axis position of the medium substrate (10), the groove width of the inverted U-shaped groove (24) is 0.46-0.5mm, the upper portion transverse length is 5.8-6.2mm, and the lower portion two sides vertical length is 3.8-4.2 mm.
5. A miniaturized, dual-notch, ultra-wideband antenna, as defined in claim 1, wherein: the symmetrical quarter circle cutting angles (21) are positioned at two sides of the lower part of the radiation patch (20), and the circle radius is 4.17-4.21 mm.
6. A miniaturized, dual-notch, ultra-wideband antenna, as defined in claim 1, wherein: the rectangular groove (22) is positioned on the axis above the radiation patch (20), the horizontal length of the rectangular groove (22) is 5.0-5.4mm, and the vertical length of the rectangular groove (22) is 5.8-6.2 mm.
7. A miniaturized, dual-notch, ultra-wideband antenna, as defined in claim 1, wherein: the radius of the semicircular grounding plate (40) is 9mm, the rectangle (41) at the top of the semicircular grounding plate is positioned at the central axis of the semicircular grounding plate (40), the horizontal length is 1.8-2.2mm, and the vertical length is 5.0-5.4 mm.
8. A miniaturized, dual-notch, ultra-wideband antenna, as defined in claim 1, wherein: the characteristic impedance of the microstrip feeder line (30) is 50 omega, the length of the microstrip feeder line is 10.5-10.9mm, and the width of the microstrip feeder line is 1.2 mm.
9. A miniaturized, dual-notch ultra-wideband antenna, as claimed in any one of claims 1 to 8, characterized in that: the thickness of the dielectric substrate (10) is 1mm, and the length and the width of the dielectric substrate (10) are 25mm and 18mm respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011079087.8A CN112216971A (en) | 2020-10-10 | 2020-10-10 | Miniaturized double-trapped wave ultra-wideband antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011079087.8A CN112216971A (en) | 2020-10-10 | 2020-10-10 | Miniaturized double-trapped wave ultra-wideband antenna |
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| CN112216971A true CN112216971A (en) | 2021-01-12 |
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| CN202011079087.8A Withdrawn CN112216971A (en) | 2020-10-10 | 2020-10-10 | Miniaturized double-trapped wave ultra-wideband antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552193A (en) * | 2022-02-28 | 2022-05-27 | 上海师范大学 | High-gain broadband printing sleeve antenna |
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| CN101242028A (en) * | 2008-03-14 | 2008-08-13 | 东南大学 | Dual resistance belt ultra-broadband antenna based on non-symmetric stick line |
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| CN203503783U (en) * | 2013-06-28 | 2014-03-26 | 齐齐哈尔大学 | Ultra wideband antenna possessing double trapped wave characteristics |
| CN104953288A (en) * | 2015-06-29 | 2015-09-30 | 天津大学 | Small UWB (ultra-wideband) antenna with band-notch characteristics in multiple frequency bands |
| CN106785463A (en) * | 2017-01-09 | 2017-05-31 | 中国人民解放军防空兵学院 | A kind of single trap ultra-wideband monopole antenna |
| CN107834190A (en) * | 2017-12-04 | 2018-03-23 | 河北工业大学 | A kind of small capacity double trap UWB antenna |
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2020
- 2020-10-10 CN CN202011079087.8A patent/CN112216971A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101242028A (en) * | 2008-03-14 | 2008-08-13 | 东南大学 | Dual resistance belt ultra-broadband antenna based on non-symmetric stick line |
| CN202308312U (en) * | 2011-11-15 | 2012-07-04 | 中国计量学院 | Ultra wideband antenna with stop-band characteristic |
| CN203503783U (en) * | 2013-06-28 | 2014-03-26 | 齐齐哈尔大学 | Ultra wideband antenna possessing double trapped wave characteristics |
| CN104953288A (en) * | 2015-06-29 | 2015-09-30 | 天津大学 | Small UWB (ultra-wideband) antenna with band-notch characteristics in multiple frequency bands |
| CN106785463A (en) * | 2017-01-09 | 2017-05-31 | 中国人民解放军防空兵学院 | A kind of single trap ultra-wideband monopole antenna |
| CN107834190A (en) * | 2017-12-04 | 2018-03-23 | 河北工业大学 | A kind of small capacity double trap UWB antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114552193A (en) * | 2022-02-28 | 2022-05-27 | 上海师范大学 | High-gain broadband printing sleeve antenna |
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Application publication date: 20210112 |