CN106025528A - Broadband monopole antenna having multi-trapped wave characteristic - Google Patents
Broadband monopole antenna having multi-trapped wave characteristic Download PDFInfo
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- CN106025528A CN106025528A CN201610506725.7A CN201610506725A CN106025528A CN 106025528 A CN106025528 A CN 106025528A CN 201610506725 A CN201610506725 A CN 201610506725A CN 106025528 A CN106025528 A CN 106025528A
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- antenna
- earth plate
- medium substrate
- band
- groove
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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
Abstract
The invention discloses a broadband monopole antenna having a multi-trapped wave characteristic. The antenna comprises a ground plate, a dielectric substrate, a feed network, and a radiation paster. The thickness of the dielectric substrate is 1.6mm. The ground plate is arranged at one side of the dielectric substrate; and the feed network and the radiation paster are arranged at the other side of the dielectric substrate. The width of the ground plate is equal to that of the radiation paster. An H-shaped groove, an inverted-E-shaped groove and a cross-shaped groove are formed in the radiation paster. A rectangular notch is formed in the ground plate. The antenna has the trapped wave characteristic at a frequency band of 3.3 to 3.4 GHz and a frequency band of 5.15 to 6.0 GHz; and the interference on the ultra-wideband system by other signals from three kinds of frequency bands of WiMax wireless communication (3.3t to 3.7 GHz), C-waveband satellite communication (3.7 to 4.2 GHz), and WLAN (5.15 to 5.825 GHz) can be suppressed effectively. The antenna having advantages of excellent performances, stable radiation direction, small size, simple design, and easy manufacturing is suitable for an ultra-wideband wireless communication system and has the broad application prospects.
Description
Technical field
The present invention relates to antenna technical field, specifically, relate to a kind of wideband monopole with many trap characteristics
Antenna.
Background technology
Broad-band antenna is the antenna system in field of antenna with broad based growth and application prospect, and main cause is its frequency band
Wide, cover on a large scale, the problem that narrow-band antenna frequency band is narrow, range of application is little can be solved.Ultra-wideband antenna is broad-band antenna
One, refers to must be able to cover 3.1-10.6GHz frequency band, and it is to be proposed and develop under the background of band resource shortage
's.2002, FCC (FCC) issued new wide-band communication system specification, and one of main purpose is exactly
Alleviate anxiety and the demand of reply high-speed communication of band resource, lead to 3.1-10.6GHz frequency allocation to civilian ultra broadband
Courier's use, makes broadband and super-broadband tech be widely used in the fields such as industry, medical science, domestic life.
In the past few decades, Development of Wireless Communications is rapid, and super-broadband tech is due to its in wireless communications important
Property, and have as unrivaled excellent in other narrow-band communication systems such as High Data Rate, low-loss, economical and practical, low-complexities
Gesture, the always important topic of communications field research.But, along with fast development and the appearance of various application of radio communication,
The serious problem such as occur in that the anxiety of band resource, the working band of different system overlaps, has influence on radio communication system
The practicality of system and reliability.Therefore, the ultra-wideband antenna with trap characteristic causes the attention of scholars, this antenna energy
Other interference signals of shielding special frequency channel, to strengthen the signal to noise ratio of the useful signal that antenna receives, reduce interference.
Summary of the invention
The invention aims to overcome deficiency of the prior art, it is provided that a kind of at 3.3-4.3GHz and 5.15-
Two frequency ranges of 6.0GHz have the ultra-wideband antenna of trap characteristic, and it can suppress WiMAX radio communication (3.3-effectively
The these three frequency ranges such as 3.7GHz), C-band satellite communication (3.7-4.2GHz) and WLAN (5.15-5.825GHz) radio communication
The interference that radio ultra wide band system is produced by other signals.This antenna performance is good, radiation directivity is relatively stable, and compact size,
Design is simple, be prone to making, it is adaptable to super broad band radio communication system, therefore it has the biggest application prospect.
It is an object of the invention to be achieved through the following technical solutions:
A kind of wideband monopole sub antenna with many trap characteristics, including earth plate, medium substrate, feeding network and radiation
Paster, the thickness of described medium substrate is 1.6mm, and medium substrate side is located at by earth plate, and medium substrate opposite side is provided with feed
Network and radiation patch, described earth plate is equal with the width of described radiation patch, described radiation patch is etched with H-shaped groove,
The shape of falling E groove and cross bath, described earth plate is provided with rectangular slot.
The groove width of described H-shaped groove, the shape of falling E groove and cross bath is respectively 0.5mm, 1mm and 1mm.
Described medium substrate is made by epoxy resin panel material.
The relative dielectric constant of described medium substrate is 4.4, and loss tangent value is 0.02.
The specification of described medium substrate is 20mm × 25mm.
The width of described earth plate is 6mm.
Compared with prior art, technical scheme is had the benefit that
1. in the radiation patch of inventive antenna, it is etched with H-shaped groove, the shape of falling E groove and cross bath, the knot of these three flutings
Structure can change the distribution character of electric current on paster greatly, is possible not only to reduce low frequency, interactional mutually in intermediate frequency generation
Benefit effect, i.e. tunes intermediate frequency, it is also possible to produce required trap characteristic near low frequency；Meet purpose of design and requirement, frequently
Band utilization rate is higher.
2. inventive antenna is through simulation analysis, it is known that the beamwidth of antenna is 3.09-10.85GHz, at 3.3-4.3GHz and
5.15-6.0GHz frequency range produces band and falls into characteristic, and except the two frequency range, antenna return loss in effective bandwidth is less than-10dB,
Voltage standing wave ratio VSWR < 2.The band produced in 3.3-4.3GHz frequency range falls into characteristic, can well suppress WiMAX (3.3-3.7GHz)
And the interference that radio ultra wide band system is produced by C-band satellite communication (3.7-4.2GHz) both narrow band signals；At 5.15-6.0GHz
The band that frequency range produces falls into characteristic, can well suppress the narrow band signals such as WLAN (5.15-5.825GHz) radio communication to ultra broadband
The interference that system produces, thus improve the practicality of this antenna.
3. the width of inventive antenna earth plate is that 6mm, best performance, and earth plate are provided with rectangular slot, can pass through
The rectangular slot of earth plate carrys out tuned antenna bandwidth, can reduce low frequency aptly, overcome the skew of preferable stopband, enable the antenna to reach
To good impedance matching, preferable bandwidth and stopband are obtained.
4. inventive antenna uses microstrip line as feeding network, is the one of Typical Structure Design based on feed microstrip line
Plant novelty, the ultra-wideband antenna of miniaturization；And there is good radiance, meet radio ultra wide band system to Antenna Design
Requirement.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the side-looking structural representation of the present invention.
Fig. 3 is the physical dimension schematic diagram of the specific embodiment of the invention.
Fig. 4 is radiation patch return loss simulation result under difference fluting state in inventive antenna.
Fig. 5 is that earth plate of the present invention is with or without the return loss simulation result under rectangular slot state.
Fig. 6 is that earth plate of the present invention is emulated under different in width the simulation result obtained.
Fig. 7 (a), Fig. 7 (b) and Fig. 7 (c) are that inventive antenna is respectively in tri-frequencies of 3.2GHz, 6.2GHz and 9.0GHz
The antenna pattern at place.
Reference: the 1-earth plate 2-medium substrate 3-feeding network 4-radiation patch 5-H shape groove 6-shape of falling E groove
7-cross bath 8-rectangular slot
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
As shown in Figure 1 to Figure 3, a kind of wideband monopole sub antenna with many trap characteristics, including earth plate 1, medium base
Plate 2, feeding network 3 and radiation patch 4, medium substrate 2 made by FR4 (epoxy resin) panel material commonly used, and relative dielectric is normal
Number is 4.4, and loss tangent value is 0.02, and thickness is 1.6mm, and the shape of antenna is as it is shown in figure 1, antenna uses side feedback mode, defeated
Entering impedance is 50 Ω.
Antenna in the present embodiment is to be produced on, by engraving method, the medium that specification is 20mm × 25mm × 1.6mm
On substrate 2, earth plate 1 etches in medium substrate 2 side, and the opposite side of medium substrate 2 is etched with feeding network 3 and radiation patch
4, feeding network 3 is made up of microstrip line, and earth plate 1 is narrow rectangular configuration, and earth plate 1 is provided with rectangular slot 8, earth plate 1 with
The width of radiation patch 4 is equal, and radiation patch 4 is etched with H-shaped groove 5, the shape of falling E groove 6 and cross bath 7, H-shaped in the present embodiment
The groove width of groove 5, the shape of falling E groove 6 and cross bath 7 is respectively 0.5mm, 1mm and 1mm.
As shown in Figure 3: the figure shows is the inventive antenna concrete dimensional parameters after optimizing design, and unit is
Millimeter, wherein the groove width of H-shaped groove 5, the shape of falling E groove 6 and cross bath 7 is respectively 0.5mm, 1mm and 1mm, the thickness of medium substrate 2
For 1.6mm.
By setting up antenna model, carry out all-wave 3 D electromagnetic emulation and optimization, obtain the return loss of antenna and not
Directional diagram at same frequency, and simulation result is analyzed.Fig. 4, Fig. 5 are respectively the different structure radiation patch of design
The return loss simulation result of antenna when whether the return loss of antenna and earth plate have rectangular slot.Fig. 6 is to parameter ground connection
The result that the width of plate is optimized, reflects the size impact on return loss of earth plate width.Fig. 7 (a), 7 (b) and 7
C () is antenna antenna pattern simulation result respectively at 3.2GHz, 6.2GHz, 9.0GHz frequency.
Through simulation analysis, it is known that the beamwidth of antenna is 3.09-10.85GHz, at 3.3-4.3GHz and 5.15-6.0GHz frequency
Section produces band and falls into characteristic, and except the two frequency range, antenna return loss in effective bandwidth is less than-10dB, voltage standing wave ratio
VSWR<2.The band produced in 3.3-4.3GHz frequency range falls into characteristic, can well suppress WiMAX (3.3-3.7GHz) and C-band to defend
The interference that radio ultra wide band system is produced by star communication (3.7-4.2GHz) both narrow band signals；Produce in 5.15-6.0GHz frequency range
Band fall into characteristic, can well suppress the narrow band signals such as WLAN (5.15-5.825GHz) radio communication to radio ultra wide band system produce
Interference, thus improve the practicality of this antenna.
Antenna related parameters is optimized, finally gives a width of 3.09-10.85GHz of band of antenna.Its echo available
The simulation result of loss, and carried out relative analysis, as shown in Figure 4, as can be seen from Figure 4 with the antenna of different structure:
(1), during radiation patch 4 only H-shaped groove 5 and cross bath 7, a width of 3.2-10.8GHz of band of antenna, at 3.5-
Two frequency ranges of 4.5GHz and 6.15-7.6GHz have trap characteristic, it is impossible to obtain preferable stopband, sacrifice 6.15-7.6GHz's
Available band, and low-limit frequency is 3.2GHz, does not reaches the 3.1GHz of ultra broadband requirement.
(2), during the radiation patch 4 only shape of falling E groove 6 and cross bath 7, a width of 3.8-10.6GHz of band of antenna, at 4.7-
Two frequency ranges of 5.75GHz and 6.5-7.5GHz have trap characteristic, it is impossible to shielding WiMAX and the interference of C-band narrow band signal, cause
6.5-7.5GHz frequency range is unavailable, and the ultra broadband claimed range of 3.1-10.6 can not be completely covered.
(3), during radiation patch 4 only H-shaped groove 5 and the shape of falling E groove 6, a width of 3.2-9.5GHz of band of antenna, at 3.5-
Two frequency ranges of 4.6GHz and 5.3-6.45GHz have trap characteristic, have trap characteristic, sacrifice part in the desired frequency range of part
The resource of frequency range, and the ultra wide band range of 3.1-10.6 can not be covered.
(4) when radiation patch 4 has H-shaped groove 5, the shape of falling E groove 6 and cross bath 7 simultaneously, a width of 3.09-of band of antenna
10.85GHz, has trap characteristic in 3.3-4.3GHz and 5.15-6.0GHz frequency range, contains 3.3-to be suppressed simultaneously
Tri-frequency ranges of 3.7GHz, 3.7-4.2GHz and 5.15-5.825GHz.Meeting purpose of design and requirement, band efficiency is higher, energy
The ultra wide band range of 3.1-10.6GHz is completely covered.Visible, when antenna has three above at a distance of nearer difformity simultaneously
And during the fluting of width, the structures of these three flutings can change the distribution character of electric current on paster greatly, is possible not only to fall
Low frequency, produces interactional complementary action at intermediate frequency, i.e. tunes intermediate frequency, it is also possible to falling into required for producing near low frequency
Wave property.
By Fig. 4 it can also be seen that except band fall into frequency range effective bandwidth in, the return loss of inventive antenna all-
Below 10dB, 3.2,8.4, at 10.3GHz frequency even up to-23.5 ,-20 ,-31.5dB, it is achieved that good impedance
Coupling.
As seen from Figure 5: when the radiation patch 4 of antenna has above-mentioned H-shaped groove 5, the shape of falling E groove 6 and cross bath all the time
7, and earth plate 1 without rectangular slot 8 time, the beamwidth of antenna is 3.25-10.85GHz, it is impossible to the low-frequency range of ultra broadband is completely covered
(3.1-3.25GHz), and now the comparatively ideal stopband of stopband of antenna offsets to the right；When the earth plate 1 of antenna has rectangular slot 8
Time, obtain preferable bandwidth and stopband.Visible, tuned antenna bandwidth can be carried out by the rectangular slot 8 of earth plate 1, can be suitable
Ground reduces low frequency, overcomes the skew of preferable stopband, enables the antenna to reach good impedance matching.
As can be seen from Figure 6: as a width of 5mm of earth plate 1, the beamwidth of antenna is 3.1-10.65GHz, and stopband is
3.45-4.5GHz and 5.3-5.9GHz, antenna has two stopbands, has certain skew, low frequency part with preferable stopband
Join good, but when frequency increases, performance starts to run down.As a width of 6mm of earth plate 1, antenna has preferable three resistances
Band, the beamwidth of antenna is 3.09-10.85GHz, and impedance matching is good.As a width of 7mm of earth plate 1, the beamwidth of antenna is about
3.25-11.6GHz, in 3.55-7.9GHz frequency range return loss more than-10dB, it is clear that do not meet the design purpose, do not have ideal
Trap characteristic.As a width of 8mm of earth plate 1, the beamwidth of antenna is about 8.9-10.65GHz, and effective bandwidth is further narrow as,
Antenna also becomes common wide antenna.Visible, as a width of 6mm of earth plate 1, preferable antenna performance can be obtained, when
When the width of earth plate 1 is decreased or increased, antenna performance all can deteriorate, and bandwidth all can narrow.Understand by analysis, earth plate 1
Width be optimal result when taking 6mm.
Further, owing to antenna performance the most also can be impacted by other parameter of antenna structure, thus need into
The optimization of one step, has finally given the parameter size in the optimum value of antenna size, i.e. Fig. 3.
From Fig. 7 (a) to Fig. 7 (c), the antenna antenna pattern in E face and H face respectively in approximation fall the figure of eight and
The radiation characteristic (high frequency treatment produces a small amount of secondary lobe) of approximation omnidirectional, antenna gain in impedance bandwidth is about 1.8dB.Wherein
E face refers to the directional diagram tangent plane parallel with direction of an electric field；H face refers to the directional diagram tangent plane parallel with magnetic direction.
The feeding network 3 of inventive antenna uses microstrip transmission lines, emulation and result of study to show: this antenna exists
Return loss in 3.09-10.85GHz (except 3.3-4.3GHz and 5.15-6.0GHz frequency range) frequency range is less than-10dB, and
There is good radiance, meet the radio ultra wide band system requirement to Antenna Design.
The present invention is not limited to embodiments described above.Description to detailed description of the invention is intended to describe and say above
Bright technical scheme, above-mentioned detailed description of the invention is only schematically, is not restrictive.Without departing from this
In the case of invention objective and scope of the claimed protection, those of ordinary skill in the art also may be used under the enlightenment of the present invention
Make the concrete conversion of a lot of form, within these belong to protection scope of the present invention.
Claims (6)
1. there is a wideband monopole sub antenna for many trap characteristics, paste including earth plate, medium substrate, feeding network and radiation
Sheet, it is characterised in that the thickness of described medium substrate is 1.6mm, earth plate is located at medium substrate side, medium substrate opposite side
Being provided with feeding network and radiation patch, described earth plate is equal with the width of described radiation patch, and described radiation patch etches
Having H-shaped groove, the shape of falling E groove and cross bath, described earth plate is provided with rectangular slot.
A kind of wideband monopole sub antenna with many trap characteristics, it is characterised in that described H-shaped
The groove width of groove, the shape of falling E groove and cross bath is respectively 0.5mm, 1mm and 1mm.
A kind of wideband monopole sub antenna with many trap characteristics, it is characterised in that described medium
Substrate is made by epoxy resin panel material.
4. according to the wideband monopole sub antenna with many trap characteristics a kind of described in claim 1 or 3, it is characterised in that described
The relative dielectric constant of medium substrate is 4.4, and loss tangent value is 0.02.
5. according to the wideband monopole sub antenna with many trap characteristics a kind of described in claim 1 or 3, it is characterised in that described
The specification of medium substrate is 20mm × 25mm.
6. according to the wideband monopole sub antenna with many trap characteristics a kind of described in claim 1 or 3, it is characterised in that described
The width of earth plate is 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610506725.7A CN106025528A (en) | 2016-06-30 | 2016-06-30 | Broadband monopole antenna having multi-trapped wave characteristic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610506725.7A CN106025528A (en) | 2016-06-30 | 2016-06-30 | Broadband monopole antenna having multi-trapped wave characteristic |
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| CN106025528A true CN106025528A (en) | 2016-10-12 |
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| CN201610506725.7A Pending CN106025528A (en) | 2016-06-30 | 2016-06-30 | Broadband monopole antenna having multi-trapped wave characteristic |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394374A (en) * | 2017-06-30 | 2017-11-24 | 天津大学 | Ultra-wideband monopole antenna with double trap characteristics |
| CN109755735A (en) * | 2019-01-14 | 2019-05-14 | 东华大学 | A kind of wideband microstrip slot antenna |
| CN114498019A (en) * | 2022-04-15 | 2022-05-13 | 南京林业大学 | Antenna patch, patch antenna, antenna array and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203056093U (en) * | 2012-12-06 | 2013-07-10 | 哈尔滨飞羽科技有限公司 | Novel trapezoid ultra-wideband antenna |
| CN203056085U (en) * | 2012-12-03 | 2013-07-10 | 哈尔滨飞羽科技有限公司 | Single rectangular structure resonant chamber ultra-wideband antenna |
| CN104681943A (en) * | 2013-11-27 | 2015-06-03 | 哈尔滨黑石科技有限公司 | Ultra-broadband antenna with notched characteristic |
| CN104900996A (en) * | 2015-04-30 | 2015-09-09 | 天津大学 | Ultra wide band monopole antenna with trap characteristic |
| CN104916907A (en) * | 2015-05-12 | 2015-09-16 | 天津大学 | Ultra-wideband monopole antenna with three band rejection characteristics |
-
2016
- 2016-06-30 CN CN201610506725.7A patent/CN106025528A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203056085U (en) * | 2012-12-03 | 2013-07-10 | 哈尔滨飞羽科技有限公司 | Single rectangular structure resonant chamber ultra-wideband antenna |
| CN203056093U (en) * | 2012-12-06 | 2013-07-10 | 哈尔滨飞羽科技有限公司 | Novel trapezoid ultra-wideband antenna |
| CN104681943A (en) * | 2013-11-27 | 2015-06-03 | 哈尔滨黑石科技有限公司 | Ultra-broadband antenna with notched characteristic |
| CN104900996A (en) * | 2015-04-30 | 2015-09-09 | 天津大学 | Ultra wide band monopole antenna with trap characteristic |
| CN104916907A (en) * | 2015-05-12 | 2015-09-16 | 天津大学 | Ultra-wideband monopole antenna with three band rejection characteristics |
Non-Patent Citations (1)
| Title |
|---|
| M. MEHRANPOUR，J. NOURINIA: "Dual Band-Notched Square Monopole Antenna for Ultrawideband Applications", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394374A (en) * | 2017-06-30 | 2017-11-24 | 天津大学 | Ultra-wideband monopole antenna with double trap characteristics |
| CN109755735A (en) * | 2019-01-14 | 2019-05-14 | 东华大学 | A kind of wideband microstrip slot antenna |
| CN114498019A (en) * | 2022-04-15 | 2022-05-13 | 南京林业大学 | Antenna patch, patch antenna, antenna array and electronic equipment |
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