CN103094676A - Ultra wide band antenna provided with T-shaped structure and matched branches and having band elimination characteristic - Google Patents
Ultra wide band antenna provided with T-shaped structure and matched branches and having band elimination characteristic Download PDFInfo
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- CN103094676A CN103094676A CN2012105003882A CN201210500388A CN103094676A CN 103094676 A CN103094676 A CN 103094676A CN 2012105003882 A CN2012105003882 A CN 2012105003882A CN 201210500388 A CN201210500388 A CN 201210500388A CN 103094676 A CN103094676 A CN 103094676A
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Abstract
The invention discloses an ultra wide band antenna provided with a T-shaped structure and matched branches and having a band elimination characteristic. The ultra wide band antenna comprises a T-shaped structure band, a circular radiation body, a rectangular matched branch, a transitional matched branch, a coplane metal board, a micro-strip feeder and a dielectric substrate, wherein the front end of the micro-strip feeder is provided with the radiation body in a circular shape to change a path of currents on the surface of the antenna and enables the antenna to work in an ultra wide band frequency band. The front end of the circular radiation body is provided with three matched branches to increase resonant frequency points of the antenna and achieve the aim of enlarging the band width of the antenna. The T-shaped structure band is embedded in the circular radiation body to achieve the band elimination function of the antenna and enable the antenna to have a stop band in the ultra wide band frequency band. The antenna can meet technical requirements of an ultra wide band, and achieve the good band elimination characteristic between 5.1GHz and 5.8GHz. The antenna has good application prospects in the ultra wide band field due to the fact that the antenna is simple and compact in structure, convenient to process and easy to integrate with an active circuit.
Description
Technical field
The present invention relates to a kind of ultra-wideband antenna with band resistance characteristic in the communications field, more particularly, be by realizing with the annulus of T-shaped structure and the coupling minor matters of rectangular configuration the ultra-wideband antenna that it is communicated by letter and have band resistance characteristic in 5.1～5.8GHz frequency range in 3.0～11.0GHz ultra broadband frequency range.
Background technology
In February, 2002, FCC (FCC) approval with the frequency range of 3.1～10.6GHz as the spendable frequency range of ultra broadband (UWB) system.Since then, the design of wireless ultra-wideband system is more and more paid close attention to.The UWB system has good anti-multipath and disturbs, the advantages such as broadband and High Data Rate.And most important part is the UWB antenna in the wireless UWB system.For the requirement of UWB antenna, mainly be included in ultra broadband (3.0～11.0GHz) good impedance matchings, stable gain and good omnidirectional radiation characteristic, and require antenna miniaturization and cheap for manufacturing cost.
The UWB antenna is operated in so wide bandwidth, may receive the interference signal from other communication or radio system of working in same environment in this frequency range, IEEE802.11a such as wireless lan (wlan), frequency range is operated in 5.150～5.350GHz and 5.725～5.825GHz, the HIPERLAN/2 frequency range is operated in 5.150～5.350GHz and 5.470～5.725GHz, and they all will consist of the ultra broadband work system disturbs.Therefore designing a kind of ultra-wideband antenna with belt-resistance function, be used for the interference of other narrow band signal of filtering, is to be necessary very much and actual.Method commonly used is to add filter in the antenna back or design a plurality of antennas that are operated in different frequency range mutually to form stopband reaching the function of filtering interfering frequency band signals, but this has increased volume and the cost of antenna.More effective method is, π type T-shaped by adding on the radiating element of antenna or U-shaped structure band changing the radiating element Surface current distribution reaching the function of band resistance, but this can only provide a stopband usually, the thoroughly potential interference of filtering.T-shaped structure can play band resistance characteristic at document " Z.Liu in antenna, H.Deng, and X.He, A New Band-Notched UWBPrinted Monopole Antenna " (Global Symposium on Millimeter Waves, pp.291-294, 2008) and " C.Hong, C.Ling, I.Tarn, and S.Chung, Designof a Planar Ultrawideband Antenna With a New-Notch Structure " (IEEETransation on Antennas Propagation, vol.55, no.12, pp.3391-3397, Dec.2007) make a concrete analysis of in.。
In addition, ultra-wideband monopole antenna adopts coplanar wave guide feedback, because size is little, and has impedance matching property and omnidirectional radiation characteristic and in UWB field extensive use in ultra broadband.Document " K.Lau, P.Li, and K.Man, A Monopolar Patch Antenna with Very WideImpedance Bandwidth " (IEEE Transation on Antennas Propagation, vol.53, no.3, pp.1004-1010, Mar.2005) a kind of ultra-wideband monopole paster antenna disclosed.Ultra-wideband antenna by coplanar wave guide feedback has low section, wide bandwidth, and low-power consumption easily with characteristics such as circuit are integrated, so is widely used in communication system.
Summary of the invention
The objective of the invention is to propose a kind of novel ultra-wideband antenna with band resistance characteristic with T-shaped structure and coupling minor matters, not only satisfied the ultra broadband requirement that FCC proposes, and realized belt-resistance function at 5.1GHz～5.8GHz, avoided using the interference between antenna equipment.This antenna structure is simple, is easy to processing, is convenient to active circuit integrated.
A kind of ultra-wideband antenna with band resistance characteristic with T-shaped structure and coupling minor matters of the present invention, this ultra-wideband antenna comprise T-shaped structure band (1), annulus radiant body (2), the first rectangle coupling minor matters (31), the second rectangle coupling minor matters (32), the 3rd rectangle coupling minor matters (33), transition coupling minor matters (4), microstrip feed line (5), left coplanar metallic plate (61), right coplanar metallic plate (62) and dielectric substrate (7);
T-shaped structure band (1) is positioned at annulus radiant body (2);
The first rectangle coupling minor matters (31) are positioned at the left side of annulus radiant body (2) outside;
The second rectangle coupling minor matters (32) are positioned at the top of annulus radiant body (2) outside;
The 3rd rectangle coupling minor matters (33) are positioned at the left side of annulus radiant body (2) outside;
Microstrip feed line (5) is connected to the below of annulus radiant body (2) outside;
Left coplanar metallic plate (61) is positioned at the left side of microstrip feed line (5);
Right coplanar metallic plate (62) is positioned at the right side of microstrip feed line (5);
T-shaped structure band (1), annulus radiant body (2), the first rectangle coupling minor matters (31), the second rectangle coupling minor matters (32), the 3rd rectangle coupling minor matters (33), transition coupling minor matters (4), microstrip feed line (5), left coplanar metallic plate (61) and right coplanar metallic plate (62) are etched on dielectric substrate (7) for covering copper.
The present invention compared with prior art has following apparent outstanding substantive distinguishing features and remarkable advantage:
1. the invention provides a kind of miniaturization, can produce in a large number and have in the WLAN frequency range ultra-wideband antenna of band resistance characteristic, can effectively suppress the interference of potential WLAN frequency band signals.
2. in the present invention, T-shaped structure band, annulus radiant body, rectangle coupling minor matters, transition coupling minor matters, coplanar metallic plate and microstrip feed line all in the same side of dielectric substrate, have simple, the easy to process advantage of compact conformation.Simultaneously whole antenna volume less (26mm * 34mm * 1.6mm), lightweight, and adopt planar structure, be easy to active circuit integrated.
3. the present invention's structure of adopting T-shaped structure band to embed the annulus radiant body realizes the mode of band resistance, and the length by controlling T-shaped structure band and the radius size of annulus radiant body can conveniently be controlled the centre frequency of stopband, can be applicable to various concrete demands.
4. the present invention adopts that three rectangles coupling minor matters are distributed on the annulus radiant body, left and right three ends, increases the resonant frequency point of antenna, thereby improves the antenna standing wave ratio of high-frequency point, and the bandwidth of widening antenna is operated in the ultra broadband frequency range antenna better.
Description of drawings
Fig. 1 is the external structure of ultra-wideband antenna of the present invention.
Figure 1A is the vertical view of ultra-wideband antenna of the present invention.
Fig. 2 is that the present invention is with L
11+ L
12Change the simulation result figure of antenna standing wave ratio.
Fig. 3 is that the present invention is with R
InChange the simulation result figure of antenna standing wave ratio.
Fig. 4 is that the present invention is with L
31Change the simulation result figure of antenna standing wave ratio.
Fig. 5 is the standing-wave ratio simulation result figure of antenna of the present invention.
Fig. 6 is the gain simulation result figure of antenna of the present invention.
Fig. 7 A is that antenna of the present invention is at the far-field radiation directional diagram of the E of 5GHz face.
Fig. 7 B is that antenna of the present invention is at the far-field radiation directional diagram of the H of 5GHz face.
Fig. 8 A is that antenna of the present invention is at the far-field radiation directional diagram of the E of 5.4GHz face.
Fig. 8 B is that antenna of the present invention is at the far-field radiation directional diagram of the H of 5.4GHz face.
Fig. 9 A is that antenna of the present invention is at the far-field radiation directional diagram of the E of 6GHz face.
Fig. 9 B is that antenna of the present invention is at the far-field radiation directional diagram of the H of 6GHz face.
Figure 10 A is that antenna of the present invention is at the far-field radiation directional diagram of the E of 7GHz face.
Figure 10 B is that antenna of the present invention is at the far-field radiation directional diagram of the H of 7GHz face.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Shown in Fig. 1, Figure 1A, the present invention is a kind of ultra-wideband antenna with band resistance characteristic with T-shaped structure and coupling minor matters, and this ultra-wideband antenna comprises T-shaped structure band 1, annulus radiant body 2, the first rectangle coupling minor matters 31, the second rectangle coupling minor matters 32, the 3rd rectangle coupling minor matters 33, transition coupling minor matters 4, microstrip feed line 5, left coplanar metallic plate 61, right coplanar metallic plate 62 and dielectric substrate 7;
Described T-shaped structure band 1 is positioned at annulus radiant body 2;
The first rectangle coupling minor matters 31 are positioned at the left side of annulus radiant body 2 outsides;
The second rectangle coupling minor matters 32 are positioned at the top of annulus radiant body 2 outsides;
The 3rd rectangle coupling minor matters 33 are positioned at the left side of annulus radiant body 2 outsides;
Left coplanar metallic plate 61 is positioned at the left side of microstrip feed line 5;
Right coplanar metallic plate 62 is positioned at the right side of microstrip feed line 5;
T-shaped structure band 1, annulus radiant body 2, the first rectangle coupling minor matters 31, the second rectangle coupling minor matters 32, the 3rd rectangle coupling minor matters 33, transition coupling minor matters 4, microstrip feed line 5, left coplanar metallic plate 61 and right coplanar metallic plate 62 are etched on dielectric substrate 7 for covering copper technology.That is to say, T-shaped structure band 1, annulus radiant body 2, the first rectangle coupling minor matters 31, the second rectangle coupling minor matters 32, the 3rd rectangle coupling minor matters 33, transition coupling minor matters 4, microstrip feed line 5, left coplanar metallic plate 61 and right coplanar metallic plate 62 are metallic copper material.In order to realize integrated with active circuit, the structure of the present invention's design is small-sized and compact, and cost is low and be easy to processing.
In the present invention, described T-shaped structure band 1 is embedded in annulus radiant body 2, its objective is for the band resistance of a 5.1GHz～5.8GHz is provided in the antenna passband.The horizontal length of T-shaped structure band 1 is designated as L
11Be designated as L with vertical length
12, the vertical wide W that is designated as of T-shaped structure band 1
11With the horizontal wide W that is designated as
12, the thickness of T-shaped structure band 1 is designated as h
1(being also the thickness that covers copper).
In the present invention, described annulus radiant body 2 is connected to the front end of microstrip feed line 5, and cirque structure changes the path of antenna surface electric current, makes the energy of antenna can be more effective to external radiation, for antenna provides 3.0GHz～11.0GHz ultra broadband bandwidth.The inside radius of annulus radiant body 2 is designated as R
In, outer radius is designated as R
Outward, height is designated as h
2
In the present invention, the purpose that designs respectively three rectangle coupling minor matters (the first rectangle coupling minor matters, the second rectangle coupling minor matters and the 3rd rectangle coupling minor matters) is in order to increase the resonant frequency point of antenna, thereby improve the standing-wave ratio characteristic of antenna, reach the purpose that improves the beamwidth of antenna.The length of the first rectangle coupling minor matters 31 is designated as L
31, the wide W that is designated as
31, height is designated as h
31The length of the second rectangle coupling minor matters 32 is designated as L
32, the wide W that is designated as
32, height is designated as h
32The length of the 3rd rectangle coupling minor matters 33 is designated as L
33, the wide W that is designated as
33, height is designated as h
33, and L
33=L
31, W
33=W
31, h
31=h
32=h
33The first rectangle coupling minor matters 31 and the 3rd rectangle coupling minor matters 33 are designated as respectively H apart from the height on dielectric substrate 7 narrow limits
31And H
33, and H
31=H
33
In the present invention, described transition coupling minor matters 4 are connected between annulus radiant body 2 and microstrip feed line 5, realize the impedance matching of antenna, make the more effective broadening of the beamwidth of antenna.The length of transition coupling minor matters 4 is designated as L
4, the wide W that is designated as
4, height is designated as h
4
In the present invention, the both sides of the coplanar metallic plate 61 in the described right side and left coplanar metallic plate 62 distribution microstrip feed lines 5, microstrip feed line 5 and coplanar metallic plate 6 have consisted of the feeding classification of co-planar waveguide for antenna, be convenient to the integrated of antenna and active circuit under this feeding classification.The length of microstrip feed line 5 is designated as L
5, the wide W that is designated as
5, height is designated as h
5The length of coplanar metallic plate 6 is designated as L
6, the wide W that is designated as
6, height is designated as h
6
In the present invention, the same side of described dielectric substrate 7 distributing T-shaped structure band 1, annulus radiant body 2, rectangle coupling minor matters 3, transition coupling minor matters 4, microstrip feed line 5 and coplanar metallic plate 6, structure small compact.To adopt dielectric constants be 4.4 for dielectric substrate 7 in the present invention, and the loss tangent angle is 0.02 FR4 material.The length of dielectric substrate 7 is designated as L
7, the wide W that is designated as
7, height is designated as h
7
In the present invention, T-shaped structure band 1, annulus radiant body 2, rectangle coupling minor matters 3, transition coupling minor matters 4, microstrip feed line 5 and coplanar metallic plate 6 are copper or copper foil material.
In the present invention, the size of T-shaped structure band 1, annulus radiant body 2, rectangle coupling minor matters 3, rectangle transition minor matters 4, microstrip feed line 5, coplanar metallic plate 6 is in height identical, i.e. h
1=h
2=h
31=h
32=h
33=h
4=h
5=h
6
For ultra-wideband antenna structure Figure 1A with band resistance characteristic and the parameter value in Figure 1B are chosen, antenna of the present invention designs on the computer that Ansoft HFSS is installed, emulation and analysis.Described computer be a kind of can be according to the program of prior storage, automatically, the modernization intelligent electronic device that carries out at high speed massive values computation and various information processings.Minimalist configuration is CPU 2GHz, internal memory 2GB, hard disk 180GB; Operating system is windows 2000/2003/XP.HFSS software is to be developed by U.S. Ansoft company, it is 3 D electromagnetic field simulation software, it uses the tangent vector Finite Element, the electromagnetic field that can find the solution Arbitrary 3 D radio frequency, microwave device distributes, the loss that calculating brings due to material and radiation, the results such as characteristic impedance, propagation coefficient, S parameter and electromagnetic field, radiation field, antenna pattern, specific absorption rate be can directly obtain, the design of antenna, feeder line, filter etc. and the calculating of the problems such as electromagnetic compatibility, electromagnetic interference, antenna arrangement and mutual coupling are widely used in.
In antenna of the present invention, determine that the major parameter of antenna performance is the length L of T-shaped structure band 1
11And L
12, the inside radius R of annulus radiant body 2
In, the length L of the first rectangle coupling minor matters 31
31So, main by adjusting parameter value L
11+ L
12, R
2And L
31Reach the performance index of the antenna of the present invention's design.
In the present invention, choose the length L of T-shaped structure band 1
11+ L
12For analytical parameters former because: annulus radiant body 2 and T-shaped structure band 1 are equal to inductance and electric capacity in circuit, be embedded in T-shaped structure band 1 at annulus radiant body 2, thereby cause in resonance frequency place's antenna impedance generation conversion to cause impedance mismatch, produce a stopband; Adjust the parameter of T-shaped structure band 1, its resonant frequency point also can and then change, thereby the centre frequency of stopband also can change, due to the length L of T-shaped structure band 1
11And L
12Compare width W
11And W
12More easily adjust, so choose the length L of T-shaped structure band 1
11And L
11Control parameter as resonant frequency point; And the length L of T-shaped structure band 1
11And L
12All need to measure, and length L
11And L
12During variation, produce an effect is equivalent, so for ease of analyzing, L
11And L
12Be combined in and adopt L together
11+ L
12As analytical parameters.
In the present invention, choose the inside radius R of annulus radiant body 2
InFor analytical parameters former because: adjust the parameter of annulus radiant body 2, can change the equivalent inductance value in circuit, thereby can change the unmatched degree of antenna impedance, and then change the bandwidth of stopband; In order to satisfy the purpose of antenna miniaturization, keep the outer radius R of annulus radiant body 2
OutwardConstant, choose inside radius R
InAs the control parameter of the bandwidth of stopband, so R
InAs analytical parameters.
In the present invention, choose the length L of the first rectangle coupling minor matters 31
31For analytical parameters former because: adjust the parameter of rectangle coupling minor matters, can change the size of high-frequency place resonant frequency point, thereby change the bandwidth of passband; In the parameter of rectangle coupling minor matters, the first rectangle coupling minor matters 31 and the 3rd rectangle coupling minor matters 33 to the second rectangle coupling minor matters 32 are more easily adjusted, length L
31And L
33Compare width W
31And W
33More easily adjust, and the length of the first rectangle coupling minor matters 31 is identical with the length of the 3rd rectangle coupling minor matters 33, i.e. L
31=L
33So, L
31As analytical parameters.
Antenna major parameter of the present invention is to the antenna performance impact analysis:
(A) adjust L in T-shaped structure band 1
11+ L
12Length be increased to 9.9mm from 7.9mm, in other parameter such as table 1, parameter value remains unchanged, and gathers the simulation result (as shown in Figure 2) of antenna standing wave ratio figure by HFSS simulation software (HFSS 11);
(B) adjust the inside radius R of annulus radiant body 2
InBe increased to 7.2mm from 5.2mm, in other parameter such as table 1, parameter value remains unchanged, and gathers the simulation result (as shown in Figure 3) of antenna standing wave ratio figure by HFSS simulation software (HFSS 11);
(C) adjust the length L of the first rectangle coupling minor matters 3
31Be increased to 3.5mm from 1.9mm, in other parameter such as table 1, parameter value remains unchanged, and gathers the simulation result (as shown in Figure 4) of antenna standing wave ratio figure by HFSS simulation software (HFSS 11).
Fig. 2 can find out L
11+ L
12Length value the stopband center frequency is had a great impact, work as L
11+ L
12Length value be increased to 9.9mm from 7.9mm, the centre frequency of stopband transforms to 4.3GHz from 5.6GHz, and very little on passband impact.So can be by regulating L in T-shaped structure band 1
11+ L
12The length centre frequency of regulating stopband.
Fig. 3 can find out R
InLength value bandwidth of rejection is had a great impact, work as R
InBe increased to 7.2mm from 5.2mm, antenna standing wave ratio corresponding to stopband center frequency is increased to 8.0 from 4.3, and the stopband center frequency reduces very littlely.So can adjust annulus radiant body 2 inside radius R by adjusting
InThe length bandwidth of regulating stopband.
Fig. 4 can find out L
31Length value the upper cut off frequency of passband is had a great impact, work as L
31Be increased to 3.5mm from 1.9mm, the upper cut off frequency of passband reduces to 10.5GHz, and the lower limiting frequency of passband is substantially constant.So can be by adjusting L in the first rectangle coupling minor matters 31
31Length is regulated the bandwidth of passband.
Adopt HFSS software to carry out simulation analysis to the parameter value in the ultra-wideband antenna structure chart with band resistance characteristic, the parameter that obtains is as shown in table 1.
Value corresponding to parameter in table 1 ultra-wideband antenna structure chart
| Parameter | Parameter value (mm) | Parameter | Parameter value (mm) |
| L 1x | 5.00 | W 11 | 0.50 |
| L 12 | 3.54 | W 12 | 0.50 |
| L 31 | 3.31 | W 31 | 1.00 |
| L 32 | 0.58 | W 32 | 1.00 |
| L 4 | 3.00 | W 4 | 0.82 |
| L 5 | 14.55 | W 5 | 2.00 |
| L 6 | 13.46 | W 6 | 11.15 |
| L 7 | 34.00 | W 7 | 26.00 |
| h 7 | 1.60 | H 31 | 6.00 |
| R Outward | 9.50 | R In | 5.91 |
| h 6 | 0.0018 | ? | ? |
Ultra-wideband antenna by table 1 parameter designing goes out by HFSS emulation, obtains standing-wave ratio, gain and the E face of antenna, the far-field radiation directional diagram of H face, respectively as shown in Fig. 5,6 and 7.
As shown in Figure 5, ultra-wideband antenna in the standing-wave ratio of 5.1～5.8GHz greater than 2, and at all the other frequency range standing internal waves of 3.0～11.0GHz than all less than 2, so ultra-wideband antenna has band resistance characteristic at 5.1～5.8GHz.
As shown in Figure 6, ultra-wideband antenna all has better and mild gain on the frequency stopband frequency range 5.1～5.8GHz, and the gain at the 5.4GHz place in the stopband frequency range obviously descends.
In Fig. 7 A, Fig. 7 B, Fig. 8 A, Fig. 8 B, Fig. 9 A, Fig. 9 B, Figure 10 A, Figure 10 B, ultra-wideband antenna is 5,5.4,6 with during the operating frequency of 7GHz, corresponding E face and main pole and the cross-polarized far-field radiation directional diagram of H face.As seen from the figure, on these operating frequencies, the directional diagram of the H face of antenna is omnidirectional radiation, and the directional diagram of the E face of antenna is bidirectional radiation.Because 5.4GHz is in the stopband frequency range, so the gain of the directional diagram of Fig. 8 A, Fig. 8 B is starkly lower than the gain of the directional diagram of Fig. 7 A, Fig. 7 B, Fig. 9 A, Fig. 9 B, Figure 10 A and Figure 10 B.
By Fig. 5,6 and 7～10 analogous diagram as can be known antenna of the present invention satisfy the performance index of the ultra-wideband antenna with band resistance characteristic, have obvious 5.1～5.8GHz stopband in 3.0～11.0GHz ultra broadband passband.
Claims (6)
1. ultra-wideband antenna with band resistance characteristic with T-shaped structure and coupling minor matters, it is characterized in that: this ultra-wideband antenna comprises T-shaped structure band (1), annulus radiant body (2), the first rectangle coupling minor matters (31), the second rectangle coupling minor matters (32), the 3rd rectangle coupling minor matters (33), transition coupling minor matters (4), microstrip feed line (5), left coplanar metallic plate (61), right coplanar metallic plate (62) and dielectric substrate (7);
T-shaped structure band (1) is positioned at annulus radiant body (2);
The first rectangle coupling minor matters (31) are positioned at the left side of annulus radiant body (2) outside;
The second rectangle coupling minor matters (32) are positioned at the top of annulus radiant body (2) outside;
The 3rd rectangle coupling minor matters (33) are positioned at the left side of annulus radiant body (2) outside;
Microstrip feed line (5) is connected to the below of annulus radiant body (2) outside;
Left coplanar metallic plate (61) is positioned at the left side of microstrip feed line (5);
Right coplanar metallic plate (62) is positioned at the right side of microstrip feed line (5);
T-shaped structure band (1), annulus radiant body (2), the first rectangle coupling minor matters (31), the second rectangle coupling minor matters (32), the 3rd rectangle coupling minor matters (33), transition coupling minor matters (4), microstrip feed line (5), left coplanar metallic plate (61) and right coplanar metallic plate (62) are etched on dielectric substrate (7) for covering copper.
2. according to claim 1 with T-shaped structure and the ultra-wideband antenna with band resistance characteristic that mates minor matters, it is characterized in that: described T-shaped structure band (1) is embedded in annulus radiant body (2), and the band resistance of 5.1GHz～5.8GHz can be provided in the antenna passband.
3. according to claim 1 with T-shaped structure and the ultra-wideband antenna with band resistance characteristic that mates minor matters, it is characterized in that: described annulus radiant body (2) is connected to the front end of microstrip feed line (5), cirque structure changes the path of antenna surface electric current, make the energy of antenna more effective to external radiation, for antenna provides 3.0GHz～11.0GHz ultra broadband bandwidth.
4. the ultra-wideband antenna with band resistance characteristic with T-shaped structure and coupling minor matters according to claim 1, it is characterized in that: it is 4.4 that dielectric substrate (7) adopts dielectric constant, the loss tangent angle is 0.02 FR4 material.
5. according to claim 1 with T-shaped structure and the ultra-wideband antenna with band resistance characteristic that mates minor matters, it is characterized in that: in order to realize integrated with active circuit, the structure of the described ultra-wideband antenna with band resistance characteristic with T-shaped structure and coupling minor matters satisfies size relationship and is:
L in T-shaped structure band (1)
11+ L
12Length be increased to 9.9mm from 7.9mm;
The inside radius R of annulus radiant body (2)
InBe increased to 7.2mm from 5.2mm;
The length L of the first rectangle coupling minor matters (3)
31Be increased to 3.5mm from 1.9mm.
6. according to claim 1 with T-shaped structure and the ultra-wideband antenna with band resistance characteristic that mates minor matters, it is characterized in that: the ultra-wideband antenna with band resistance characteristic with T-shaped structure and coupling minor matters of design, in the standing-wave ratio of 5.1～5.8GHz greater than 2, and compare all less than 2 at all the other frequency range standing internal waves of 3.0～11.0GHz, so ultra-wideband antenna has band resistance characteristic at 5.1～5.8GHz.
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Cited By (6)
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| CN104993225A (en) * | 2015-06-23 | 2015-10-21 | 浙江工商大学 | Miniature G-type monopole antenna applied to WLAN |
| CN105379010A (en) * | 2013-07-16 | 2016-03-02 | Lg伊诺特有限公司 | Ultra-wide band antenna |
| CN106067595A (en) * | 2016-05-20 | 2016-11-02 | 中国电子科技集团公司第十研究所 | The little beam antenna of ultra wide band electrically |
| CN106910997A (en) * | 2017-02-28 | 2017-06-30 | 电子科技大学 | A kind of multi-band planar printed antenna |
| CN112186333A (en) * | 2020-09-29 | 2021-01-05 | 华南理工大学 | Base station antenna, radiation unit and radiation arm |
| US12066841B2 (en) | 2020-10-05 | 2024-08-20 | Crown Equipment Corporation | Systems and methods for relative pose determination and field enforcement of materials handling vehicles using ultra-wideband radio technology |
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| CN101164199A (en) * | 2005-04-26 | 2008-04-16 | 株式会社Emw天线 | Ultra-wideband antenna having a band notch characteristic |
| CN102299420A (en) * | 2011-06-17 | 2011-12-28 | 哈尔滨工程大学 | Annular multiple-wave-trap ultra-wideband antenna |
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