CN102104199A - Zero resonance unit-loaded broadband planar inverted-F antenna - Google Patents
Zero resonance unit-loaded broadband planar inverted-F antenna Download PDFInfo
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- CN102104199A CN102104199A CN2010105273191A CN201010527319A CN102104199A CN 102104199 A CN102104199 A CN 102104199A CN 2010105273191 A CN2010105273191 A CN 2010105273191A CN 201010527319 A CN201010527319 A CN 201010527319A CN 102104199 A CN102104199 A CN 102104199A
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Abstract
The invention discloses a zero resonance unit-loaded broadband planar inverted-F antenna. The antenna comprises a top microstrip structure, a bottom dielectric substrate and an input/output port, wherein the top microstrip structure comprises a coplanar waveguide transmission line, an antenna main body, a feed line, a loading interdigital capacitor and a ground thin-wire inductor, wherein one end of the coplanar waveguide transmission line is connected with the input/output port and the other end is fed to the antenna main body through the feed line; one terminal of the antenna main body is provided with the loading interdigital capacitor and the ground thin-wire inductor; the ground thin-wire inductor is connected with a floor board; the loading interdigital capacitor, the ground thin-wire inductor and the antenna main body together form a zero resonance unit; and the top microstrip structure is arranged on the bottom dielectric substrate. By loading the zero resonance unit in a broadband planar inverted-F antenna, the problems of large area, complex machining and the like of the broadband planar inverted-F antenna are solved; therefore, the zero resonance unit-loaded broadband planar inverted-F antenna has the advantages that the size is small, the broadband is broad, the structure is simple, the broadband planar inverted-F antenna is easy to machine and the like.
Description
Technical field
The invention belongs to the wireless telecommunications system design field, particularly a kind of broadband planar inverted-F antenna that loads zero resonant element.
Background technology
Along with mobile communication rapid development, antenna is as the transceiving device of Wireless Telecom Equipment, and people have proposed more and more higher requirement to its performance.Planar inverted-F antenna is widely used among the Wireless Telecom Equipment because its compact conformation, low, in light weight, the easy manufacturing of section, be easy to plurality of advantages such as microwave circuit is integrated, becomes the principal mode of current built-in aerial.In present wireless service, except traditional GSM and DCS, be added to already in a lot of terminal equipments, therefore, realize that on a planar inverted-F antenna covering a plurality of frequency ranges becomes pressing for of Antenna Design as bluetooth, WLAN etc.
Mostly the broadband planar inverted-F antenna is that fluting is introduced new resonance frequency on the basis of conventional planar inverse-F antenna at present, perhaps loads some parasitic elements and improves coupling, perhaps partly adopts capacitive coupling to increase bandwidth at feed.But these antenna mostly is double-deck turnover structure greatly, and volume is bigger, and processed complex is unsuitable for microwave circuit integratedly, and to design a kind of size little so need to seek new mentality of designing, and processing is simple, is convenient to the integrated broad-band antenna of microwave circuit.
Anisotropic media has unique electromagnetic property as a kind of new type of microwave structure, and as negative index, negative Doppler effect, contrary Qi Lunkefu radiation etc., it is used in the design and exploitation that has been penetrated into all kinds of microwave devices already.Anisotropic media is specially the form of composite right/left-handed transmission line in planar circuit, is generally periodic structure, and zero resonance is a critical nature of composite right/left-handed transmission line.
Therefore, how zero resonant element is applied to become in the planar inverted-F antenna of broadband a problem that has theoretical and real value.
Summary of the invention
Main purpose of the present invention is to overcome the shortcoming of prior art with not enough, and a kind of broadband planar inverted-F antenna that loads zero resonant element is provided, it has, and size is little, bandwidth is wide, simple in structure, be easy to advantage such as processing.
Purpose of the present invention realizes by following technical scheme: a kind of broadband planar inverted-F antenna that loads zero resonant element comprises upper strata microstrip structure, bottom medium substrate and input/output port; Described upper strata microstrip structure comprises co-planar waveguide (coplanar waveguide, CPW) transmission line, antenna body, feed-in line, loading interdigital capacitor, ground connection fine rule inductance, described coplanar waveguide transmission line one end links to each other with input/output port, the other end directly is fed into antenna body through the feed-in line, antenna body one terminal is provided with and loads interdigital capacitor and ground connection fine rule inductance, and ground connection fine rule inductance and floor join; Described loading interdigital capacitor and ground connection fine rule inductance constitute one zero resonant element together with antenna body; Described upper strata microstrip structure is arranged on the bottom medium substrate.
Described antenna body is a monopole antenna.
Described antenna body forms by cracking and loads interdigital capacitor.
Described coplanar waveguide transmission line is 50 ohm transmission line.
Described input/output port is one.
Described antenna body is according to the wavelength decision of high band.
The quantity of described loading interdigital capacitor increases or reduces according to needed zero resonance frequency, is used to control resonance point.
Described loading interdigital capacitor and the series connection of ground connection fine rule inductance.
The relative dielectric constant of described bottom medium substrate is 1-100, and thickness is 0.1mm-5mm.
The present invention compared with prior art has following advantage and beneficial effect:
1, the present invention has overcome problems such as broadband planar inverted-F antenna volume is big, processed complex by load zero resonant element in the planar inverted-F antenna of broadband, have that size is little, bandwidth is wide, simple in structure, be easy to advantage such as processing.
2, the present invention is series capacitance, inductance by the short-circuit line of replacing the primary plane inverse-F antenna, can constitute zero resonant element and introduce new resonance frequency under the situation of not destroying primary plane inverse-F antenna radiation characteristic, and change antenna size hardly.
3, the present invention makes antenna can be operated under the more pattern by loading new resonant tank, and bandwidth has obtained expansion, and not too big change of radiation characteristic in frequency range.
4, the present invention adopts coplanar wave guide feedback, and antenna structure all is in same plane, thus the ground connection inductance need not the punching, handling ease, cost is low, is convenient to other circuit integrated.
Description of drawings
Fig. 1 is a structure perspective view of the present invention;
Fig. 2 is a return loss Electromagnetic Simulation curve of the present invention;
Fig. 3 (a)-(c) is the antenna pattern of the present invention at 1.9GHz;
Fig. 4 (a)-(c) is the antenna pattern of the present invention at 2.4GHz;
Fig. 5 (a)-(c) is the antenna pattern of the present invention at 3.1GHz;
Fig. 6 is the size indication figure of a kind of broadband planar inverted-F antenna in the prior art;
Fig. 7 is the return loss Electromagnetic Simulation curve of device shown in Figure 6.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
As shown in Figure 1, a kind of broadband planar inverted-F antenna that loads zero resonant element comprises upper strata microstrip structure, bottom medium substrate 10 and input/output port 13; Described upper strata microstrip structure comprises coplanar waveguide transmission line 11, antenna body 20, feed-in line 21, loads interdigital capacitor 22, ground connection fine rule inductance 23, described coplanar waveguide transmission line 11 1 ends link to each other with input/output port 13, the other end directly is fed into antenna body 20 through feed-in line 21, antenna body 20 1 terminals are provided with and load interdigital capacitor 22 and ground connection fine rule inductance 23, and ground connection fine rule inductance 23 joins with floor 12; Described loading interdigital capacitor 22 and ground connection fine rule inductance 23 constitute one zero resonant element together with antenna body 20; Described upper strata microstrip structure is arranged on the bottom medium substrate 10.
Described antenna body 20 is a monopole antenna.
Described antenna body 20 forms by cracking and loads interdigital capacitor 22.
Described coplanar waveguide transmission line 20 is 50 ohm transmission line.
Described input/output port 13 is one.
Described antenna body 20 is according to the wavelength decision of high band, the wavelength decision in the present embodiment during by high band 3.1GHz.
The quantity of described loading interdigital capacitor 22 increases or reduces according to needed zero resonance frequency, is used to control resonance point, and the zero resonance frequency of foundation is 1.85GHz in the present embodiment.
Described loading interdigital capacitor 22 and 23 series connection of ground connection fine rule inductance.
The dielectric constant of described bottom medium substrate 10 is 4.4, and thickness is 1.6mm.
Load interdigital capacitor 22 and ground connection fine rule inductance 23 in the present invention and constitute one zero resonant element, can be operated under zero condition of resonance, obtain a lower resonance frequency in this unit under certain frequency together with antenna body 20.Under higher frequency, loading interdigital capacitor 22 and ground connection fine rule inductance 23 formation series resonant circuits can be considered short-circuit line under resonance frequency and antenna body 20 together constitutes traditional planar inverted-F antenna, thereby work under upper frequency.The present invention has dwindled the size of antenna effectively, and antenna body is 12.5mm*7.81mm in the present embodiment, only is equivalent to 0.076 λ * 0.048 λ under 1.85GHz, and λ is the vacuum medium wavelength.
In order to confirm antenna characteristics of the present invention, carry out emulation as shown in Figure 2, the present embodiment frequency characteristic is the amplitude (return loss) of S11, and abscissa is represented frequency variable, and unit is GHz, and ordinate is represented the amplitude variable of S11, and unit is dB.Broadband of the present invention as can be seen from Fig. 2 planar inverted-F antenna return loss-10dB bandwidth upper limiting frequency is 3.49GHz, lower frequency limit is 1.77GHz, and relative bandwidth is 69.2%, such broader bandwidth for planar inverted-F antenna, can cover more frequency range, satisfy the requirement of multi-communication protocol.
In order to confirm the advantage of antenna of the present invention, choose a kind of traditional broadband planar inverted-F antenna and do contrast, Fig. 6 is the size indication figure of this antenna body 40, short-circuit line 42 and feed-in line 44 direct printed wiring board using thems.This antenna takes gradual manner to increase bandwidth, and antenna body is of a size of 16.8mm*8.1mm.As shown in Figure 7, this contrast antenna frequency characteristic is the amplitude (return loss) of S11, and abscissa is represented frequency variable, unit is GHz, ordinate is represented the amplitude variable of S11, and unit is dB, and this frequency range scope that ratio antenna is measured is 2.128GHz-2.83GHz, relative bandwidth is about 28.6%, by contrast, the size of antenna of the present invention: 12.5mm*7.81mm, relative bandwidth: 69.2%, size is littler, and bandwidth is wideer.
Shown in Fig. 3,4,5, be respectively present embodiment at 1.9GHz, 2.4GHz, 3.1GHz the antenna pattern of locating, wherein the (a) and (b) among each figure, (c) figure are respectively the directional diagram on xz plane under this frequency, yz plane, xy plane, wherein solid line is represented the φ durection component of aerial radiation electric field strength in spherical coordinate, the θ durection component of dotted line representative aerial radiation electric field strength in spherical coordinate.From Fig. 3 (a), Fig. 4 (a), Fig. 5 (a), can find out at high, normal, basic three frequencies of working frequency range, not occur the skew on the big radiation direction on the xz plane; From Fig. 3 (b), Fig. 4 (b), Fig. 5 (b), can find out at high, normal, basic three frequencies of working frequency range, not occur the skew on the big radiation direction on the yz plane; From Fig. 3 (c), Fig. 4 (c), Fig. 5 (c), can find out at high, normal, basic three frequencies of working frequency range, not occur the skew on the big radiation direction on the xy plane.Each planar radiation directional diagram basically identical can satisfy the directional diagram requirement of broad-band antenna work.In addition, can get 1.9GHz, 2.4GHz from Fig. 3, Fig. 4, Fig. 5,3.1GHz the antenna gain at three frequency places is respectively 2.47dB, 2.57dB, 2.77dB, individual layer antenna as a kind of miniaturization, compared to prior art, it is higher to gain, and can satisfy the requirement of communication system, and the basically identical that gains in whole frequency.
Present embodiment except that following characteristics other structures with embodiment 1: the relative dielectric constant of described bottom medium substrate is 1, and thickness is 0.1mm.
Present embodiment except that following characteristics other structures with embodiment 1: the relative dielectric constant of described bottom medium substrate is 100, and thickness is 5mm.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (9)
1. a broadband planar inverted-F antenna that loads zero resonant element is characterized in that, comprises upper strata microstrip structure, bottom medium substrate and input/output port; Described upper strata microstrip structure comprises coplanar waveguide transmission line, antenna body, feed-in line, loads interdigital capacitor, ground connection fine rule inductance, described coplanar waveguide transmission line one end links to each other with input/output port, the other end directly is fed into antenna body through the feed-in line, antenna body one terminal is provided with and loads interdigital capacitor and ground connection fine rule inductance, and ground connection fine rule inductance links to each other with the floor; Described loading interdigital capacitor and ground connection fine rule inductance constitute one zero resonant element together with antenna body; Described upper strata microstrip structure is arranged on the bottom medium substrate.
2. the broadband planar inverted-F antenna of loading according to claim 1 zero resonant element is characterized in that described antenna body is a monopole antenna.
3. the broadband planar inverted-F antenna of loading according to claim 2 zero resonant element is characterized in that, described antenna body forms by cracking and loads interdigital capacitor.
4. the broadband planar inverted-F antenna of loading according to claim 3 zero resonant element is characterized in that, described antenna body is according to the wavelength decision of high band.
5. the broadband planar inverted-F antenna of loading according to claim 1 zero resonant element is characterized in that described coplanar waveguide transmission line is 50 ohm transmission line.
6. the broadband planar inverted-F antenna of loading according to claim 1 zero resonant element is characterized in that described input/output port is one.
7. the broadband planar inverted-F antenna of loading according to claim 1 zero resonant element is characterized in that, the quantity of described loading interdigital capacitor increases or reduces according to needed zero resonance frequency, is used to control resonance point.
8. the broadband planar inverted-F antenna of loading according to claim 3 zero resonant element is characterized in that, described loading interdigital capacitor and the series connection of ground connection fine rule inductance.
9. the broadband planar inverted-F antenna of loading according to claim 1 zero resonant element is characterized in that the relative dielectric constant of described bottom medium substrate is 1-100, and thickness is 0.1mm-5mm.
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| CN2010105273191A CN102104199A (en) | 2010-10-28 | 2010-10-28 | Zero resonance unit-loaded broadband planar inverted-F antenna |
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| CN2010105273191A CN102104199A (en) | 2010-10-28 | 2010-10-28 | Zero resonance unit-loaded broadband planar inverted-F antenna |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509879A (en) * | 2011-12-14 | 2012-06-20 | 上海交通大学 | Circular polarized antenna with omnidirectional broad axial ratio beam width |
| CN102570043A (en) * | 2012-01-18 | 2012-07-11 | 华南理工大学 | Multi-polarization microstrip patch antenna loading zero-order resonator |
| CN103199339A (en) * | 2013-03-28 | 2013-07-10 | 哈尔滨工程大学 | Reactance loaded dual-band antenna |
| CN103236579A (en) * | 2013-03-29 | 2013-08-07 | 华南理工大学 | Multimode broadband resonant antenna |
| CN103887610A (en) * | 2014-03-18 | 2014-06-25 | 西安交通大学 | Broad-band micro-strip PIFA |
| CN104282978B (en) * | 2013-07-12 | 2017-04-19 | 深圳光启创新技术有限公司 | Antenna and set top box |
| CN108493598A (en) * | 2018-03-23 | 2018-09-04 | 浙江工商大学 | A kind of four band hybrid antenna of Novel asymmetric co-planar waveguide |
| CN110212316A (en) * | 2019-04-18 | 2019-09-06 | 杭州电子科技大学富阳电子信息研究院有限公司 | A kind of multiband aerial based on composite right/left-handed transmission line |
| CN111541042A (en) * | 2020-06-08 | 2020-08-14 | 重庆邮电大学 | Small electric antenna based on composite left-right-hand transmission line |
| EP3790110A1 (en) * | 2014-02-12 | 2021-03-10 | Huawei Device Co., Ltd. | Antenna and mobile terminal |
| CN113258279A (en) * | 2021-05-12 | 2021-08-13 | 福州大学 | 5G full-network-through miniaturized omnidirectional antenna based on metamaterial loading |
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| CN2540078Y (en) * | 2002-03-12 | 2003-03-12 | 正文科技股份有限公司 | Improved printed reversing F type aerial |
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| CN2540078Y (en) * | 2002-03-12 | 2003-03-12 | 正文科技股份有限公司 | Improved printed reversing F type aerial |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509879B (en) * | 2011-12-14 | 2014-08-20 | 上海交通大学 | Circular polarized antenna with omnidirectional broad axial ratio beam width |
| CN102509879A (en) * | 2011-12-14 | 2012-06-20 | 上海交通大学 | Circular polarized antenna with omnidirectional broad axial ratio beam width |
| CN102570043A (en) * | 2012-01-18 | 2012-07-11 | 华南理工大学 | Multi-polarization microstrip patch antenna loading zero-order resonator |
| CN102570043B (en) * | 2012-01-18 | 2014-05-07 | 华南理工大学 | Multi-polarization microstrip patch antenna loading zero-order resonator |
| CN103199339A (en) * | 2013-03-28 | 2013-07-10 | 哈尔滨工程大学 | Reactance loaded dual-band antenna |
| CN103199339B (en) * | 2013-03-28 | 2015-05-27 | 哈尔滨工程大学 | Reactance loaded dual-band antenna |
| CN103236579A (en) * | 2013-03-29 | 2013-08-07 | 华南理工大学 | Multimode broadband resonant antenna |
| CN103236579B (en) * | 2013-03-29 | 2016-05-04 | 华南理工大学 | A kind of multimode wideband resonance antenna |
| CN104282978B (en) * | 2013-07-12 | 2017-04-19 | 深圳光启创新技术有限公司 | Antenna and set top box |
| EP3790110A1 (en) * | 2014-02-12 | 2021-03-10 | Huawei Device Co., Ltd. | Antenna and mobile terminal |
| US11855343B2 (en) | 2014-02-12 | 2023-12-26 | Beijing Kunshi Intellectual Property Management Co., Ltd. | Antenna and mobile terminal |
| US11431088B2 (en) | 2014-02-12 | 2022-08-30 | Huawei Device Co., Ltd. | Antenna and mobile terminal |
| CN103887610B (en) * | 2014-03-18 | 2016-03-02 | 西安交通大学 | A kind of wideband microstrip PIFA antenna |
| CN103887610A (en) * | 2014-03-18 | 2014-06-25 | 西安交通大学 | Broad-band micro-strip PIFA |
| CN108493598A (en) * | 2018-03-23 | 2018-09-04 | 浙江工商大学 | A kind of four band hybrid antenna of Novel asymmetric co-planar waveguide |
| CN110212316A (en) * | 2019-04-18 | 2019-09-06 | 杭州电子科技大学富阳电子信息研究院有限公司 | A kind of multiband aerial based on composite right/left-handed transmission line |
| CN110212316B (en) * | 2019-04-18 | 2024-01-16 | 杭州电子科技大学富阳电子信息研究院有限公司 | Multiband antenna based on composite left-right hand transmission line |
| CN111541042A (en) * | 2020-06-08 | 2020-08-14 | 重庆邮电大学 | Small electric antenna based on composite left-right-hand transmission line |
| CN113258279A (en) * | 2021-05-12 | 2021-08-13 | 福州大学 | 5G full-network-through miniaturized omnidirectional antenna based on metamaterial loading |
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Application publication date: 20110622 |