CN103840271B - Multi-frequency-band cavity-backed half-mode substrate integrated waveguide bent slot antenna - Google Patents
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- CN103840271B CN103840271B CN201410070025.9A CN201410070025A CN103840271B CN 103840271 B CN103840271 B CN 103840271B CN 201410070025 A CN201410070025 A CN 201410070025A CN 103840271 B CN103840271 B CN 103840271B
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- 239000000758 substrate Substances 0.000 title claims abstract description 57
- 239000002184 metal Substances 0.000 claims abstract description 39
- 238000005452 bending Methods 0.000 claims abstract description 20
- 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
- 238000013461 design Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- PEZNEXFPRSOYPL-UHFFFAOYSA-N (bis(trifluoroacetoxy)iodo)benzene Chemical compound FC(F)(F)C(=O)OI(OC(=O)C(F)(F)F)C1=CC=CC=C1 PEZNEXFPRSOYPL-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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Abstract
The invention discloses a multi-band cavity-backed half-mode substrate integrated waveguide bending slot antenna, which comprises a feed microstrip line with gradually changed width and a cavity-backed half-mode substrate integrated waveguide, wherein the cavity-backed half-mode substrate integrated waveguide is provided with two rows of orthogonal metalized through holes, 1 zigzag slot or even number of zigzag slots which are connected and are symmetrical left and right are arranged in a resonant cavity of the cavity-backed half-mode substrate integrated waveguide, and the opening direction is vertical to the long edge of a medium substrate. The invention has the beneficial effects that: the bent gaps are adopted to change the current and field distribution of the antenna, so that the impedance matching of the antenna is improved, particularly the impedance matching of a low-frequency band; the working frequency of the antenna is changed by changing the number of the bends; two rows of metallized through holes and metal layers on the upper surface and the lower surface of the dielectric substrate are adopted to replace a large metal cavity in the cavity-backed antenna, so that the size of the antenna is reduced.
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, be usually integrated with multiple communication standard in a communication system, communication equipment often needs to support multiband work.In order to reduce electromagnetic interference, reduce costs, adopt in systems in which and support that the antenna of multiband is necessary.In recent years, there is the multiple method realizing multiband aerial, e.g., the planar monopole antenna of distortion, plane inverse-F (PIFA) antenna of improvement, and other adopts the planar slot antenna of various gap form.In these antenna, major part belongs to two-way or omnidirectional antenna.
When two-way or omnidirectional antenna need to be arranged on certain metal platform, metal platform can change antenna radiation characteristics, towards the performance of other circuit of radiation possibility influential system of platform, brings serious electromagnetic compatibility problem.Cavity-backed radiator antenna is that a kind of wire chamber or metal flat of adopting is to suppress the radiation in 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 proposed 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 similar, so the millimeter wave be made up of it and submillimeter wave parts and subsystem have high q-factor, 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 side, and plated-through hole is communicated with the metal patch being 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, thus obtain high performance directional radiation antenna.From current open source literature both at home and abroad, these cavity-backed radiator antenna majorities based on half module substrate integrated wave guide technology belong to one-band 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 that metal platform uses.
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 feeding 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 at two metal levels on described dielectric substrate and surface thereof and plated-through hole is set, described plated-through hole comprises orthogonal first row plated-through hole and secondary series plated-through hole, described two row plated-through holes surround a semi-surrounding structure along the edge distribution on two of described the first metal layer limits respectively, described semi-surrounding Structure composing resonant cavity, described feeding microstrip line is positioned at the side of resonant cavity opening, and be connected with the first metal layer, described the first metal layer is established bending gap, described bending gap is positioned at resonant cavity, it is 1 " several " font gap, or even number connects and axisymmetric " several " font gap successively, " 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, and the resonance frequency of antenna is determined jointly by the size of half module substrate integrated wave guide resonant cavity and the total length, 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, otherwise frequency is higher; The present invention adopts bending gap to play change antenna current and field distribution, thus improves the effect of the impedance matching of antenna, the especially impedance matching of low-frequency range; The present invention adopts the metal level of two row's plated-through holes and dielectric substrate upper and lower surface to replace wire chamber large in cavity-backed radiator antenna, and plated-through hole array is equivalent to metallic walls, reduces 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 the width that 1/8 is less than or equal to the first metal layer of 7/8.This improvement can meet the requirement to the different resonance frequency of antenna under different situations, realizes energy by which better gap to external radiation, the demand regulating resonance frequency.
The present invention relative to the beneficial effect of prior art is: (1) adopts bending gap to play change antenna current and field distribution, thus improves the effect of the impedance matching of antenna, the especially impedance matching of low-frequency range; (2) number by changing " several " font gap changes the operating frequency of antenna; (3) adopt the metal level of two row's plated-through holes and dielectric substrate upper and lower surface to replace wire chamber large in cavity-backed radiator antenna, reduce the size of antenna; (4) by improving the size in bending gap, realizing meeting the requirement to the different resonance frequency of antenna under different situations, realizing energy by which better gap to external radiation, the demand regulating resonance frequency.
Accompanying drawing explanation
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 multiband back cavity type half module substrate integrated wave guide bent slit antenna of the present invention contrast seamless and straight slot
11with frequency change analogous diagram.
Fig. 4 and Fig. 5 be bending gap length of the present invention and change width time antenna reflection coefficient S
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 embodiments to be only not used in for illustration of the present invention and to limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
Fig. 1 and Fig. 2 shows a kind of embodiment of a kind of multiband of the present invention back cavity type 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 feeding 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 at two metal levels on described dielectric substrate 3 and surface thereof and plated-through hole is set, 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 surround a semi-surrounding structure along the edge distribution on two limits of described the first metal layer 4 respectively, described semi-surrounding Structure composing resonant cavity, described feeding microstrip line 7 is positioned at the side of resonant cavity opening, and be connected with the first metal layer 4, described the first metal layer 4 is established bending gap 6, described bending gap 6 is positioned at resonant cavity, be 4 to connect successively and axisymmetric " several " font gap, " 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 the width that 1/8 is less than or equal to the first metal layer 4 of 7/8.
The quantity in " several " font gap is not limited to 4, and 1 or even number " several " font gap all can realize goal of the invention of the present invention, no longer describe in detail.
After application simulation software HFSS is optimized design to this antenna structure size, total length and the overall width of antenna are respectively 38.0mm, 18.4mm, and the antenna size parameter marked 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
ywidth S is had more after the gradual change of=3.0, microstrip line 7
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.Add 58mm × 75mm metal covering in simulation model to be artificially used for simulating metal platform.
Fig. 3 gives under the same condition of other parameter, reflection coefficient S when designed multiband slot antenna contrast does not add bending gap and adopts the vertical bar gap of same length
11parameter is with frequency change figure, and after simulation result has shown bending gap, antenna is at the S of low-frequency range 5.78GHz
11parameter is not by adding gap and adopting the negative zero point several decibels during vertical bar gap to change to the-9.8dB adding bending gap, and the matching performance of the design is better.
Fig. 4 and Fig. 5 shows when other parameter constant, the lower surface metal layer of half module substrate integrated wave guide open the width S in bending gap
xwith length S
gto antenna S
11the impact of parameter.Visible, work as S
xand S
gwhen increasing (namely bending the total length in gap), the resonance frequency of antenna moves to low frequency, otherwise to high-frequency mobile.Owing to changing S
xor S
galmost there is equivalent effect, therefore time restricted to overall antenna length degree, can by only changing the width S in bending gap
xreach the object of regulating frequency.
Employing thickness is domestic F4BM substrate (the relative dielectric constant ε of 1mm
r=2.2, losstangenttanδ=0.001) prepare this multiband slot antenna.Fig. 6 is the reflection coefficient using vector network analyzer PNA8363 to test multiband back cavity type HMSIW slot antenna input, and table 1 lists the parameter such as reflection coefficient, antenna efficiency, gain of antenna in each frequency range.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, each resonance point gain is minimum for 6.76dBi(11.98GHz), be 9.41dBi(13.53GHz to the maximum), conventional C frequency range and X frequency range application demand can be met.
The parameter of table 1 antenna 1
And in microwave dark room, test antenna pattern, in test by astronomical cycle on 58mm × 75mm metallic plate.Fig. 7 to Figure 11 is each frequency normalization antenna pattern recorded, the display of this figure result is except the directional diagram at 10.72GHz is except 0 degree of radiation is more weak, other frequency 0 degree of direction front and back than minimum be 13.5, be 23.6 to the maximum, antenna is at each resonance point tool directional radiation properties, antenna gain is high, and may be used for metal platform, be the antenna achieving the work of undersized C/X wave band multifrequency point.
Claims (2)
1. a multiband back cavity type half module substrate integrated wave guide bent slit antenna, comprise feeding 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 at two metal levels on described dielectric substrate (3) and surface thereof and plated-through hole is set, 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 surround a semi-surrounding structure along the edge distribution on two limits of described the first metal layer (4) respectively, described semi-surrounding Structure composing resonant cavity, described feeding microstrip line (7) is positioned at the side of resonant cavity opening, and be connected with the first metal layer (4), described the first metal layer (4) is established bending gap (6), described bending gap (6) is positioned at resonant cavity, for even number connects and axisymmetric " several " font gap successively, " several " font gap opening direction is perpendicular to the long limit of described dielectric substrate (3), two " several " font gaps in the middle of described even number " several " font gap are connected by a straight slot.
2. multiband back cavity type half module substrate integrated wave guide bent slit antenna according to claim 1, is characterized in that: the width of described bending gap (6) is more than or equal to the width that 1/8 is less than or equal to the first metal layer (4) of 7/8.
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| CN103840271B true CN103840271B (en) | 2015-12-09 |
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| US11515624B2 (en) * | 2019-03-29 | 2022-11-29 | GM Global Technology Operations LLC | Integrated cavity backed slot array antenna system |
| CN110232868B (en) * | 2019-05-31 | 2022-01-25 | Oppo广东移动通信有限公司 | Housing, housing assembly and electronic device |
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| 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 |
| CN110750898B (en) * | 2019-10-17 | 2024-03-19 | 江苏科技大学 | SIW back cavity slot antenna resonant frequency design method |
| CN111224216B (en) * | 2020-01-15 | 2021-05-28 | 杭州涂鸦信息技术有限公司 | Antenna applied to bulb lamp |
| 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 |
| CN113013628B (en) * | 2021-03-17 | 2023-05-23 | 重庆大学 | Compact high-efficiency reflection-free leaky-wave antenna |
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