CN103840271A - Multi-frequency-band cavity-backed half-mode substrate integrated waveguide bent slot antenna - Google Patents
Multi-frequency-band cavity-backed half-mode substrate integrated waveguide bent slot antenna Download PDFInfo
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- CN103840271A CN103840271A CN201410070025.9A CN201410070025A CN103840271A CN 103840271 A CN103840271 A CN 103840271A CN 201410070025 A CN201410070025 A CN 201410070025A CN 103840271 A CN103840271 A CN 103840271A
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- 239000000758 substrate Substances 0.000 title claims abstract description 58
- 239000002184 metal Substances 0.000 claims abstract description 39
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- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 description 10
- 238000010606 normalization Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
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Abstract
本发明公开了一种多频段背腔式半模基片集成波导弯折缝隙天线，包括宽度渐变的馈电微带线和背腔式半模基片集成波导，背腔式半模基片集成波导设两排正交的金属化通孔，背腔式半模基片集成波导的谐振腔内设置，1个“几”字形缝隙，或偶数个相连并左右对称的“几”字形缝隙，开口方向垂直于所述介质基片的长边。本发明的有益效果为：采用弯折缝隙起到改变天线电流和场分布，从而改善天线的阻抗匹配的作用，尤其是低频段的阻抗匹配；通过改变弯折个数来改变天线的工作频率；采用采用两排金属化通孔采用两排金属化通孔和介质基片上下表面的金属层代替背腔式天线中大的金属腔，减小了天线的尺寸。
The invention discloses a multi-band cavity-backed half-mode substrate integrated waveguide bending slot antenna, which includes a feeding microstrip line with gradually changing width and a cavity-backed half-mode substrate integrated waveguide, and a cavity-backed half-mode substrate integrated waveguide. The waveguide is provided with two rows of orthogonal metallized through-holes, set in the resonant cavity of the cavity-backed half-mode substrate integrated waveguide, one "ji"-shaped gap, or an even number of connected and left-right symmetrical "ji"-shaped gaps, the opening The direction is perpendicular to the long side of the dielectric substrate. The beneficial effects of the present invention are as follows: the use of the bending slit can change the antenna current and field distribution, thereby improving the impedance matching of the antenna, especially the impedance matching of the low frequency band; changing the working frequency of the antenna by changing the number of bending; Two rows of metallized through holes are adopted to replace the large metal cavity in the cavity-backed antenna by using two rows of metallized through holes and the metal layers on the upper and lower surfaces of the dielectric substrate, thereby reducing the size of the antenna.
Description
Technical field
The present invention relates to multiband back cavity type half module substrate integrated wave guide slot antenna in wireless communication technology field, be particularly operated in the multiband back cavity type half module substrate integrated wave guide bent slit antenna of microwave frequency band.
Background technology
Along with the fast development of radio communication, usually integrated multiple communication standards in a communication system, communication equipment often needs to support multiband work.In order to reduce electromagnetic interference, to reduce costs, in system, adopt and support the antenna of multiband to be necessary.In recent years, there is the multiple method that realizes multiband aerial, as, the planar monopole antenna of distortion, improved plane inverse-F (PIFA) antenna, and other adopts the planar slot antenna of various gap form.In these antenna, major part is to belong to two-way or omnidirectional antenna.
In the time that two-way or omnidirectional antenna need to be arranged on certain metal platform, metal platform can change antenna radiation characteristics, may affect the performance of other circuit of system towards the radiation of platform, brings serious electromagnetic compatibility problem.Cavity-backed radiator antenna be a kind of adopt wire chamber or metal flat suppress the radiation of some directions, to realize the antenna of one-way radiation.Cavity-backed radiator antenna section height based on common metal chamber is bigger than normal, can not meet the requirement of some application.
Half module substrate integrated wave guide is a kind of miniaturization structure proposing on substrate integration wave-guide (SIW) basis, and compared with substrate integration wave-guide, it can reduce the size of half nearly and not worsen the performance of substrate integration wave-guide.Its propagation characteristic and rectangular metal waveguide are similar, so the millimeter wave being made up of it and submillimeter wave parts and subsystem have high Q value, high power capacity, easily and the advantage such as planar circuit is integrated.Half module substrate integrated wave guide is made up of the metal patch of dielectric substrate positive and negative and the plated-through hole array of substrate one side, and plated-through hole is communicated with the metal patch that is overlying on dielectric substrate positive and negative.In order to eliminate radiation backward, substrate integration wave-guide (SIW) and half module substrate integrated wave guide (HMSIW) technology are applied to cavity-backed radiator antenna design, thereby obtain high performance directional radiation antenna.From at present domestic and international open source literature, these cavity-backed radiator antenna majorities based on half module substrate integrated wave guide technology belong to one-segment antenna.
Summary of the invention
The goal of the invention that the present invention will realize is: provide a kind of size less, can improve impedance matching, and can be placed on the multiband slot antenna using on metal platform.
For solving the problems of the technologies described above, a kind of multiband back cavity type half module substrate integrated wave guide bent slit antenna of the present invention, comprise feed microstrip line and the back cavity type half module substrate integrated wave guide of width gradual change, described back cavity type half module substrate integrated wave guide is by the dielectric substrate of rectangle, the first metal layer and the second metal level composition, run through plated-through hole is set at two metal levels on described dielectric substrate and surface thereof, described plated-through hole comprises orthogonal first row plated-through hole and secondary series plated-through hole, described two row plated-through holes are respectively along the edge distribution on two limits of described the first metal layer and surround a semi-surrounding structure, described semi-surrounding structure forms resonant cavity, described feed microstrip line is positioned at the side of resonant cavity opening, and be connected with the first metal layer, on described the first metal layer, establish bending gap, described bending gap is positioned at resonant cavity, it is 1 " several " font gap, or even number connects successively and axisymmetric " several " font gap, " several " font gap opening direction is perpendicular to the long limit of described dielectric substrate.
Operation principle of the present invention is: in the present invention, the resonance frequency of antenna is by the common decision of the size of half module substrate integrated wave guide resonant cavity and total length, the position etc. in gap---the size of half module substrate integrated wave guide resonant cavity is less, and antenna frequencies is higher; Several by changing " number in font gap can change the total length in gap, thus change the operating frequency of antenna, several " total length in the more gaps of number in font gap is longer, antenna frequencies is lower, on the contrary frequency is higher; The present invention adopts bending gap to play change antenna current and field distribution, thereby improves the impedance matching of effect, the especially low-frequency range of the impedance matching of antenna; The present invention adopts the metal level of two row's plated-through holes and dielectric substrate upper and lower surface to replace large wire chamber in cavity-backed radiator antenna, and plated-through hole array is equivalent to metallic walls, has reduced the size of antenna.
Two " several " font gaps in the middle of described even number " several " font gap are connected by a straight slot.
As a modification of the present invention, the width in described bending gap is more than or equal to 1/8 width that is less than or equal to 7/8 the first metal layer.This improvement can meet the requirement to the different resonance frequencys of antenna under different situations, realizes the energy demand to external radiation, adjusting resonance frequency by gap better.
The present invention with respect to the beneficial effect of prior art is: (1) adopts bending gap to play change antenna current and field distribution, thereby improves the impedance matching of effect, the especially low-frequency range of the impedance matching of antenna; (2) change the operating frequency of antenna by the number that changes " several " font gap; (3) adopt the metal level of two row's plated-through holes and dielectric substrate upper and lower surface to replace large wire chamber in cavity-backed radiator antenna, reduced the size of antenna; (4) bend the size in gap by improvement, realize and meet the requirement to the different resonance frequencys of antenna under different situations, realize energy better by gap to external radiation, regulate the demand of resonance frequency.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of multiband back cavity type of the present invention half module substrate integrated wave guide bent slit antenna.
Fig. 2 is the cross-sectional schematic of a kind of multiband back cavity type of the present invention half module substrate integrated wave guide bent slit antenna.
Reflection coefficient S when Fig. 3 is the seamless and straight slot of multiband back cavity type half module substrate integrated wave guide bent slit antenna of the present invention contrast
11with frequency change analogous diagram.
The reflection coefficient S of antenna when Fig. 4 and Fig. 5 are bending gap length of the present invention and change width
11with frequency change figure.
Fig. 6 is antenna S
11the test result of parameter.
Fig. 7 is the normalization antenna pattern of a kind of multiband back cavity type of the present invention half module substrate integrated wave guide bent slit antenna in 5.7GHz frequency range.
Fig. 8 is the normalization antenna pattern of a kind of multiband back cavity type of the present invention half module substrate integrated wave guide bent slit antenna in 10.7GHz frequency range.
Fig. 9 is the normalization antenna pattern of a kind of multiband back cavity type of the present invention half module substrate integrated wave guide bent slit antenna in 11.9GHz frequency range.
Figure 10 is the normalization antenna pattern of a kind of multiband back cavity type of the present invention half module substrate integrated wave guide bent slit antenna in 12.5GHz frequency range.
Figure 11 is the normalization antenna pattern of a kind of multiband back cavity type of the present invention half module substrate integrated wave guide bent slit antenna in 13.1GHz frequency range.
Embodiment
Be described further below in conjunction with the drawings and specific embodiments.Should understand these embodiment and only be not used in and limit the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the amendment of the various equivalent form of values of the present invention.
Fig. 1 and Fig. 2 show a kind of embodiment of a kind of multiband back cavity type of the present invention half module substrate integrated wave guide bent slit antenna.A kind of multiband back cavity type half module substrate integrated wave guide bent slit antenna of the present invention, comprise feed microstrip line 7 and the back cavity type half module substrate integrated wave guide of width gradual change, described back cavity type half module substrate integrated wave guide is by the dielectric substrate 3 of rectangle, the first metal layer 4 and the second metal level 5 form, run through plated-through hole is set at two metal levels on described dielectric substrate 3 and surface thereof, described plated-through hole comprises orthogonal first row plated-through hole 1 and secondary series plated-through hole 2, described two row plated-through holes are respectively along the edge distribution on two limits of described the first metal layer 4 and surround a semi-surrounding structure, described semi-surrounding structure forms resonant cavity, described feed microstrip line 7 is positioned at the side of resonant cavity opening, and be connected with the first metal layer 4, on described the first metal layer 4, establish bending gap 6, described bending gap 6 is positioned at resonant cavity, being 4 connects and axisymmetric " several " font gap successively, " several " font gap opening direction is perpendicular to the long limit of described dielectric substrate 3, middle 2 are connected by a straight slot, the width in described bending gap 6 is more than or equal to 1/8 width that is less than or equal to 7/8 the first metal layer 4.
The quantity in " several " font gap is not limited to 4, and goal of the invention of the present invention all can be realized in 1 or even number " several " font gap, no longer describes in detail.
Application simulation software HFSS is optimized after design this antenna structure size, and the total length of antenna and overall width are respectively 38.0mm, 18.4mm, and the antenna size parameter marking in Fig. 1 is (unit: mm) after optimal design: the length L of microstrip line 7
t=6.0, the distance L of middle straight clearance distance substrate broadside
c=18.0, the distance L on the long limit of middle straight clearance distance substrate
x=5.9, the spacing d of through-hole diameter d=1.0, adjacent two through holes
p=1.5, the width S of " several " font slot element
x=7.0, the length S of " several " font slot element
y=3.0, after the gradual change of microstrip line 7, have more width S
t=2.0, middle straight gap length S
g=8.0, gap bar width S
w=1.0, the width C of microstrip line 7
w=3.5, the first metal layer 4 broadside W=15.9, the long limit L=32.0 of the first metal layer 4.In simulation model, add artificially 58mm × 75mm metal covering to be used for simulating metal platform.
Fig. 3 has provided under the same condition of other parameter, reflection coefficient S when designed multiband slot antenna contrast does not add the vertical bar gap that bends gap and adopt same length
11parameter is with frequency change figure, and simulation result has shown behind bending gap, and antenna is at the S of low-frequency range 5.78GHz
11parameter by do not add gap and adopt several decibels of negative zero points when vertical bar gap to change to add bend gap-9.8dB, the design's matching performance is better.
Fig. 4 and Fig. 5 shown in the time of other parameter constant, and the lower surface metal layer of half module substrate integrated wave guide is opened the width S in bending gap
xwith length S
gto antenna S
11the impact of parameter.Visible, work as S
xand S
gwhile increasing (bending the total length in gap elongated), the resonance frequency of antenna moves to low frequency, otherwise to high-frequency mobile.Owing to changing S
xor S
galmost there is same texts, therefore when restricted to antenna total length, can be by only changing the width S in bending gap
xreach the object of regulating frequency.
Adopt domestic F4BM substrate (the relative dielectric constant ε that thickness is 1mm
r=2.2, losstangenttanδ=0.001) prepare this multiband slot antenna.Fig. 6 uses vector network analyzer PNA8363 to test the reflection coefficient of multiband back cavity type HMSIW slot antenna input, and table 1 has been listed antenna in parameters such as the reflection coefficient of each frequency range, antenna efficiency, gains.From table, antenna can be operated in these five frequency ranges of 5.7/10.7/11.9/12.5/13.1GHz simultaneously, and antenna meets reflection coefficient S in these five frequency ranges
11corresponding VSWR≤2 of <-10dB() bandwidth correspondence be followed successively by 230/180/300/230/290MHz, the gain of each resonance point is minimum is 6.76dBi(11.98GHz), be 9.41dBi(13.53GHz to the maximum), can meet conventional C frequency range and X frequency range application demand.
The parameter of table 1 antenna 1
And in microwave dark room, test antenna pattern, in test, antenna has been arranged on 58mm × 75mm metallic plate.Fig. 7 to Figure 11 is the each frequency normalization antenna pattern recording, this figure result shows except the directional diagram at 10.72GHz is 0 degree radiation is weak, other frequency is 13.5, is 23.6 to the maximum than minimum in the front and back of 0 degree direction, antenna is at each resonance point tool directional radiation properties, antenna gain is high, and can be for metal platform, be the antenna of having realized the work of undersized C/X wave band multifrequency point.
Claims (3)
1. a multiband back cavity type half module substrate integrated wave guide bent slit antenna, comprise feed microstrip line (7) and the back cavity type half module substrate integrated wave guide of width gradual change, described back cavity type half module substrate integrated wave guide is by the dielectric substrate (3) of rectangle, the first metal layer (4) and the second metal level (5) composition, run through plated-through hole is set at two metal levels on described dielectric substrate (3) and surface thereof, it is characterized in that: described plated-through hole comprises orthogonal first row plated-through hole (1) and secondary series plated-through hole (2), described two row plated-through holes are respectively along the edge distribution on two limits of described the first metal layer (4) and surround a semi-surrounding structure, described semi-surrounding structure forms resonant cavity, described feed microstrip line (7) is positioned at the side of resonant cavity opening, and be connected with the first metal layer (4), on described the first metal layer (4), establish bending gap (6), described bending gap (6) is positioned at resonant cavity, it is 1 " several " font gap, or even number connects successively and axisymmetric " several " font gap, " several " font gap opening direction is perpendicular to the long limit of described dielectric substrate (3).
2. multiband back cavity type half module substrate integrated wave guide bent slit antenna according to claim 1, is characterized in that: two " several " font gaps in the middle of described even number " several " font gap are connected by a straight slot.
3. multiband back cavity type half module substrate integrated wave guide bent slit antenna according to claim 1 and 2, is characterized in that: the width in described bending gap (6) is more than or equal to 1/8 width that is less than or equal to 7/8 the first metal layer (4).
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281023A (en) * | 2014-06-30 | 2016-01-27 | 中国科学院深圳先进技术研究院 | Ring-shaped half mode substrate integrated waveguide backfire antenna |
| CN105514600A (en) * | 2016-02-04 | 2016-04-20 | 东南大学 | Carinal cavity gap circularly polarized antenna adopting half module substrate integrated waveguide |
| CN105789783A (en) * | 2016-01-30 | 2016-07-20 | 西南大学 | Quarter mode substrate-integrated waveguide band-pass filter loaded with composite left and right hands |
| CN106773624A (en) * | 2016-12-20 | 2017-05-31 | 深圳市信维通信股份有限公司 | A kind of antenna structure and all-metal wrist-watch |
| CN106848559A (en) * | 2017-02-15 | 2017-06-13 | 河南师范大学 | A kind of multifrequency antenna of coplanar wave guide feedback |
| CN107634321A (en) * | 2017-08-03 | 2018-01-26 | 南京邮电大学 | Composite left and right flashlight small antenna based on triangular resonator |
| WO2019039833A1 (en) * | 2017-08-25 | 2019-02-28 | 엘지전자 주식회사 | Slot antenna and slot array antenna |
| CN109742511A (en) * | 2018-12-14 | 2019-05-10 | 惠州Tcl移动通信有限公司 | A kind of communication terminal and its antenna structure |
| WO2019154080A1 (en) * | 2018-02-06 | 2019-08-15 | 中兴通讯股份有限公司 | Antenna device and terminal |
| CN110232868A (en) * | 2019-05-31 | 2019-09-13 | Oppo广东移动通信有限公司 | Housing, housing assembly and electronic device |
| CN110492242A (en) * | 2019-08-20 | 2019-11-22 | 西安电子科技大学 | A kind of ultra-thin half short circuit round polarization top radiating antenna |
| CN110518350A (en) * | 2019-09-10 | 2019-11-29 | 北京理工大学 | A kind of circularly-polarized patch antenna of high-gain miniaturization |
| CN110750898A (en) * | 2019-10-17 | 2020-02-04 | 江苏科技大学 | Method for designing resonant frequency of SIW back cavity slot antenna |
| CN111224216A (en) * | 2020-01-15 | 2020-06-02 | 杭州涂鸦信息技术有限公司 | Antenna applied to bulb lamp |
| CN111326860A (en) * | 2020-03-30 | 2020-06-23 | 华南理工大学 | Low cross polarization dual-frequency cavity-backed antenna and wireless communication equipment |
| CN111541027A (en) * | 2020-04-23 | 2020-08-14 | 西安电子科技大学 | Multimode resonance broadband antenna based on substrate integrated waveguide resonant cavity |
| CN111755832A (en) * | 2019-03-29 | 2020-10-09 | 通用汽车环球科技运作有限责任公司 | Integrated cavity-backed slot array antenna system |
| CN113013628A (en) * | 2021-03-17 | 2021-06-22 | 重庆大学 | Compact high-efficiency reflection-free leaky-wave antenna |
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| CN109742511B (en) * | 2018-12-14 | 2021-01-26 | 惠州Tcl移动通信有限公司 | Mobile communication terminal and antenna structure thereof |
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| CN111755832A (en) * | 2019-03-29 | 2020-10-09 | 通用汽车环球科技运作有限责任公司 | Integrated cavity-backed slot array antenna system |
| CN111755832B (en) * | 2019-03-29 | 2023-08-04 | 通用汽车环球科技运作有限责任公司 | Integrated back cavity slot array antenna system |
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| CN110750898A (en) * | 2019-10-17 | 2020-02-04 | 江苏科技大学 | Method for designing resonant frequency of SIW back cavity slot antenna |
| CN110750898B (en) * | 2019-10-17 | 2024-03-19 | 江苏科技大学 | SIW back cavity slot antenna resonant frequency design method |
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| CN103840271B (en) | 2015-12-09 |
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