CN103401078A - Manufacture method for EBG frequency reconfigurable antenna capable of loading variable capacitance diode - Google Patents

Manufacture method for EBG frequency reconfigurable antenna capable of loading variable capacitance diode Download PDF

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Publication number
CN103401078A
CN103401078A CN2013102916380A CN201310291638A CN103401078A CN 103401078 A CN103401078 A CN 103401078A CN 2013102916380 A CN2013102916380 A CN 2013102916380A CN 201310291638 A CN201310291638 A CN 201310291638A CN 103401078 A CN103401078 A CN 103401078A
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China
Prior art keywords
antenna
ebg
variable capacitance
capacitance diode
paster
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CN2013102916380A
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Chinese (zh)
Inventor
邓启凌
王义富
杜春雷
董小春
高洪涛
袁桂山
王锐
史立方
胡松
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中国科学院光电技术研究所
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Priority to CN2013102916380A priority Critical patent/CN103401078A/en
Publication of CN103401078A publication Critical patent/CN103401078A/en

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Abstract

The invention discloses a manufacture method for an EBG (electromagnetic band gap) frequency reconfigurable antenna capable of loading a variable capacitance diode. The manufacture method comprises the following design steps of: (1) setting the initial working frequency f and the substrate material of an antenna and the size of the patch antenna; (2) determining the feeding mode and the feeding parameter of the antenna; (3) designing the structural parameters w and g of a loaded EBG structure, and enabling the band gap of the EGB structure to approach to the working frequency f of the antenna; (4) selecting the variable capacitance diode with the proper variable capacitance, welding the variable capacitance diode to the EBG material, loading variable direct-current voltage, and enabling the band gap adjustable range of the EBG material to cover the working frequency f of the antenna; and (5) adding the designed EBG structure added with the variable capacitance diode onto the substrate material of the patch antenna; and manufacturing the designed EBG material and antenna. Because the band gap range of the EBG structure can be regulated by changing voltage loaded on the variable capacitance diode, the working resonant frequency of the patch antenna is changed along with the change of the applied voltage so as to reconstruct the working frequency.

Description

A kind of frequency reconfigurable antenna manufacture method that loads the EBG of variable capacitance diode

Technical field

The present invention is designed into a kind of manufacture method of antenna of frequency reconfigurable, and particularly a kind of frequency reconfigurable antenna manufacture method that loads the electro-magnetic bandgap material (Electromagnetic Band-gap, EBG) of variable capacitance diode belongs to wireless communication technology field.

Background technology

Along with developing rapidly of radio communication (mobile communication, wlan network, GPS equipment) market, Radio Frequency Engineers are faced with lasting challenge in small size, multiband, broadband and low-cost system design.And low section, undersized antenna integrated to wireless system, be vital.Therefore, micro-strip paster antenna is subject to people's favor.And there are the shortcomings such as intrinsic narrow wave band and large scale in paster antenna.And reconfigurable antenna is for a kind of possible scheme that provides is provided.Different from broadband and multiband, reconfigurable antenna is that the operating state that dynamically changes in real time antenna realizes.This antenna does not cover all wave bands of work at one time, but dynamically selectively is being operated in a narrow wave band of antenna sometime.

Because the most of shape and size by antenna of the radiation characteristic (comprising resonance frequency and antenna pattern) of antenna determine.So the geometry of mechanical alteration radiating antenna provides an approach for the structure reconfigurable antenna.Therefore, utilize the reconfigurable antenna of mems switch to be subject to researcher's broad research.That utilizes the MEMs switch opens and closes characteristic, and the length that can dynamically change antenna makes it be operated in two waveband or multiband.Subsequently, utilize PIN diode to come the design frequency reconfigurable antenna also to be subject to extensive concern.Most of reconfigurable antennas all are based on this principle design.Yet frequency reconfigurable also can be realized by the characteristic that changes antenna medium.The EBG structure is a kind of material that has metal and medium to be composited by periodic arrangement.Due to its band gap properties, EBG can be used to improve the radiation characteristic of antenna, for example gain.In recent years, the researcher is by on the EBG metal patch, loading variable capacitance diode, and discovery can change band gap and the Phase shift of reflectance of EBG.

Summary of the invention

The technical problem to be solved in the present invention is: change the reconfigurable method of legacy frequencies, namely utilize the MEMs switch dynamically to change effective radiation size of antenna, and then the radiation characteristic of reconstruct antenna, for this limitation, a kind of frequency reconfigurable antenna manufacture method that loads the EBG of variable capacitance diode is provided, the EBG structure of loaded ribbon variable capacitance diode in the paster antenna base material, be added in the voltage of variable capacitance diode by change, dynamically change the electromagnetic property of EBG structure.Thereby realize the restructural of operating frequency of antenna.

Technical solution of the present invention: a kind of frequency reconfigurable antenna manufacture method that loads the EBG of variable capacitance diode is characterized in that step is as follows:

(1) set operating frequency f, the base material of antenna, and according to operating frequency, design physical dimension length L, width W and the antenna thickness h of paster antenna;

(2) determine feeding classification and the feed parameter of paster antenna;

(3) according to Finite Element Method design EBG structural parameters, establishing EBG paster width is w, and the paster gap is g, and the metallic vias radius is r, and EBG is h to the thickness of ground plate 0.Band gap with electromagnetic field numerical calculations EBG structure; By optimizing w and g, make the operating frequency f of the band gap of EBG near antenna;

(4) on two-dimensional directional, between adjacent EBG paster, load variable capacitance diode, and adding forward biased direct voltage in the both sides of variable capacitance diode, the equivalent capacity of variable capacitance diode changes with the variation of additional bias direct current voltage;

(5) part using the EBG structure of design as base material is inserted in antenna, is paster antenna and EBG paster ground plate altogether; Processing, the designed antenna of making, by changing the bias voltage of variable capacitance diode, can change the operating frequency of antenna, realizes the restructural of operating frequency of antenna.

The operating frequency f of described step (1) antenna is at microwave frequency band.Because the reconstruct of antenna frequencies is that adjusting by varactor capacitance realizes, therefore the highest frequency of antenna work of the present invention is relevant with the operating frequency of variable capacitance diode support.At microwave frequency band, so antenna also can be operated in each frequency range of microwave due to the operating frequency of present variable capacitance diode.

Feeding classification in described step (2) adopts feed microstrip line.Because the characteristic impedance of standard feed system is 50 Ω.In order to realize the areflexia impedance matching of antenna to 50 Ω standard feeder lines, need to mate design to antenna.Adoptable matching process has the matching techniques such as 1/4 wavelength impedance transformer, single two detail tuners and corner cut.

In the structural parameters of the middle EBG of described step (3), g, greater than 1mm, is mainly fixed according to the size (1mm-3mm) of actual variable capacitance diode.In order to stay enough spaces, the actual fabrication of convenient antenna for the loading variable capacitance diode.

In described step (3), the calculating of the band gap of EBG is adopted numerical methods in electromagnetic fields to comprise and is calculated dispersion map method and the transmission method that suspends.

In described step (4), variable capacitance diode is arranged and is adopted positive and negative staggered biasing means to realize, namely on same EBG paster, variable capacitance diode adopts identical access direction, and adjacent EBG paster adopts opposite access direction.Can greatly simplify like this feed circuit design of variable capacitance diode.

In described step (5), the making step of antenna is: first design paster and substrate in the EBG structure, ground plate, and then EBG paster surface adds dielectric material and the paster antenna of antenna, wherein paster antenna and EBG paster are total to ground plate, and the feeder line of variable capacitance diode adopts via hole to realize by ground plate.

The present invention's advantage compared with prior art is:

(1) frequency reconfigurable antenna of the EBG of loading variable capacitance diode of the present invention is by the voltage that changes di-cap, to change the electromagnetic property of EBG structure, rather than changes the size of antenna, and therefore, the antenna structure size is little, is easier to integrated.

(2) within the frequency reconfigurable antenna of the EBG of the loading variable capacitance diode of the present invention's design can be operated in one section continuous frequency range by change on-load voltage value.And MEMs switch frequency is discrete.Compare the frequency reconfigurable antenna of mems switch design, it has more operating state.

(3) reconfigurable antenna of the present invention is simple in structure, and cost of manufacture is lower, and is with better function.

The accompanying drawing explanation

Fig. 1 is paster antenna surface texture intention of the present invention;

Fig. 2 is structure vertical view of the present invention;

Fig. 3 is front view of the present invention;

Fig. 4 is that the present invention is that while in embodiment, providing parameter, antenna resonant frequency is with the relation curve of transfiguration diode.

Embodiment

As shown in Figure 1, 2, 3, its design process of the frequency reconfigurable antenna of the EBG of loading variable capacitance diode of the present invention is as follows:

(1) the initialization frequency of setting antenna is 2.5GHz.Base material is FR-4 (ε r=4.4).Antenna size is long l=27.9mm, wide w=36.5mm, the thickness H=3mm of antenna.

(2) feeding classification of determining antenna is microstrip line apex drive, micro belt line width w 0=5.79mm, the parameter d x=6mm of otch in feed, dy=5.5mm.As shown in Figure 1.

(3) utilize the band gap of numerical simulation software optimization EBG structure in the 3GHz left and right, near the operating frequency of antenna.The parameter of optimizing is w_EBG=8, g=2.5mm, the thickness h of EBG 0=1mm.EBG and paster antenna altogether and cobasis at the bottom of medium.

(4) model of choosing variable capacitance diode is the BB833 of infineon company, and the excursion of electric capacity is about 0.8pF~9.3pF, more than the frequency of work can reach 2.5GHz.And variable capacitance diode is loaded into to the upper also making alive feed of EBG, feeding classification such as Fig. 2 and Fig. 3.Wherein variable capacitance diode is according to its pin direction positive and negative staggered connecting on the metal patch of EBG material successively.The feed of variable capacitance diode adopts on the via hole of EBG staggered access ground level reference voltage successively and signal voltage V.In the time of can guaranteeing change in voltage, the electric capacity between all metal patches all equates.

(5) respectively antenna and the EBG structure of design are carried out to processing and fabricating, on the EBG material, weld variable capacitance diode.And by the EBG combination of materials of antenna and loading variable capacitance diode together.Can realize frequency reconfigurable antenna.Finally obtain loading the modulation relation curve of the electric capacity of variable capacitance diode to operating frequency of antenna, as Fig. 4.Can find when the electric capacity of variable capacitance diode when 0.8pF changes to 8pF, the resonance frequency of antenna (operating frequency) can be in 2.43GHz~2.85GHz frequency range restructural continuously.

Non-elaborated part of the present invention belongs to techniques well known.

The above; only be part embodiment of the present invention, but protection scope of the present invention is not limited to this, any those skilled in the art are in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.

Claims (7)

1. frequency reconfigurable antenna manufacture method that loads the EBG of variable capacitance diode is characterized in that step is as follows:
(1) set operating frequency f, the base material of antenna, and according to operating frequency, design physical dimension length L, width W and the antenna thickness h of paster antenna;
(2) determine feeding classification and the feed parameter of paster antenna;
(3) according to Finite Element Method design EBG structural parameters, establishing EBG paster width is w, and the paster gap is g, and the metallic vias radius is r, and EBG is h to the thickness of ground plate 0.Band gap with electromagnetic field numerical calculations EBG structure; By optimizing w and g, make the operating frequency f of the band gap of EBG near antenna;
(4) on two-dimensional directional, between adjacent EBG paster, load variable capacitance diode, and adding forward biased direct voltage in the both sides of variable capacitance diode, the equivalent capacity of variable capacitance diode changes with the variation of additional bias direct current voltage;
(5) part using the EBG structure of design as base material is inserted in antenna, is paster antenna and EBG paster ground plate altogether; Processing, the designed antenna of making, by changing the bias voltage of variable capacitance diode, can change the operating frequency of antenna, realizes the restructural of operating frequency of antenna.
2. a kind of frequency reconfigurable antenna manufacture method that loads the EBG of variable capacitance diode according to claim 1, it is characterized in that: the operating frequency f of described step (1) antenna is at microwave frequency band.
3. a kind of frequency reconfigurable antenna manufacture method that loads the EBG of variable capacitance diode according to claim 1, is characterized in that: the feeding classification employing feed microstrip line in described step (2).
4. a kind of frequency reconfigurable antenna manufacture method that loads the EBG of variable capacitance diode according to claim 1 is characterized in that: in described step (3) in the structural parameters of EBG g greater than 1mm.
5. a kind of frequency reconfigurable antenna manufacture method that loads the EBG of variable capacitance diode according to claim 1 is characterized in that: in described step (3), the calculating of the band gap of EBG is adopted numerical methods in electromagnetic fields to comprise and is calculated dispersion map method and the transmission method that suspends.
6. a kind of frequency reconfigurable antenna manufacture method that loads the EBG of variable capacitance diode according to claim 1, it is characterized in that: in described step (4), variable capacitance diode is arranged and is adopted positive and negative staggered biasing means to realize, be that on same EBG paster, variable capacitance diode adopts identical access direction, adjacent EBG paster adopts opposite access direction.
7. a kind of frequency reconfigurable antenna manufacture method that loads the EBG of variable capacitance diode according to claim 1, it is characterized in that: in described step (5), the making step of antenna is: first design paster and substrate in the EBG structure, ground plate, and then EBG paster surface adds dielectric material and the paster antenna of antenna, wherein paster antenna and EBG paster are total to ground plate, and the feeder line of variable capacitance diode adopts via hole to realize by ground plate.
CN2013102916380A 2013-07-11 2013-07-11 Manufacture method for EBG frequency reconfigurable antenna capable of loading variable capacitance diode CN103401078A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104347947A (en) * 2013-08-01 2015-02-11 李平 Manufacture method for frequency reconfigurable antenna of EBG loaded with varactor diode
JP2016021741A (en) * 2014-07-14 2016-02-04 パロ アルト リサーチ センター インコーポレイテッド Material-based phase shift element and phased array
CN105977638A (en) * 2016-05-12 2016-09-28 北京航空航天大学 Reconfigurable four-section Gamma-shaped winding multi-fingered electromagnetic band gap structure
CN107104288A (en) * 2017-03-09 2017-08-29 上海大学 A kind of embedded multi-layer miniaturized structure paster antenna
CN108365338A (en) * 2018-02-08 2018-08-03 中国电子科技集团公司第三十八研究所 A kind of wideband multi-mode ground suitable for ultra-wideband antenna
CN110289469A (en) * 2018-08-17 2019-09-27 中国电子科技集团公司第五十五研究所 A kind of bandpass filter and its design method based on tunable one-dimensional filtering array

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009033324A (en) * 2007-07-25 2009-02-12 Nippon Antenna Co Ltd Antenna
CN102142604A (en) * 2010-11-30 2011-08-03 南京理工大学 Microstrip antenna element with controllable directional diagram
CN102834974A (en) * 2010-04-28 2012-12-19 古河电气工业株式会社 Plane-structured ebg

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009033324A (en) * 2007-07-25 2009-02-12 Nippon Antenna Co Ltd Antenna
CN102834974A (en) * 2010-04-28 2012-12-19 古河电气工业株式会社 Plane-structured ebg
CN102142604A (en) * 2010-11-30 2011-08-03 南京理工大学 Microstrip antenna element with controllable directional diagram

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104347947A (en) * 2013-08-01 2015-02-11 李平 Manufacture method for frequency reconfigurable antenna of EBG loaded with varactor diode
JP2016021741A (en) * 2014-07-14 2016-02-04 パロ アルト リサーチ センター インコーポレイテッド Material-based phase shift element and phased array
CN105977638A (en) * 2016-05-12 2016-09-28 北京航空航天大学 Reconfigurable four-section Gamma-shaped winding multi-fingered electromagnetic band gap structure
CN105977638B (en) * 2016-05-12 2019-02-26 北京航空航天大学 The restructural four subregions Γ type winding of one kind refers to electromagnetic bandgap structure more
CN107104288A (en) * 2017-03-09 2017-08-29 上海大学 A kind of embedded multi-layer miniaturized structure paster antenna
CN108365338A (en) * 2018-02-08 2018-08-03 中国电子科技集团公司第三十八研究所 A kind of wideband multi-mode ground suitable for ultra-wideband antenna
CN110289469A (en) * 2018-08-17 2019-09-27 中国电子科技集团公司第五十五研究所 A kind of bandpass filter and its design method based on tunable one-dimensional filtering array
CN110289469B (en) * 2018-08-17 2020-04-07 中国电子科技集团公司第五十五研究所 Band-pass filter based on tunable one-dimensional filter array and design method thereof

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Application publication date: 20131120

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