CN104577287B - Harmonics restraint wideband patch coupler and its adjustment work(divide the method for ratio while realize broadband and the method that second harmonic inhibits - Google Patents
Harmonics restraint wideband patch coupler and its adjustment work(divide the method for ratio while realize broadband and the method that second harmonic inhibits Download PDFInfo
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- CN104577287B CN104577287B CN201510035102.1A CN201510035102A CN104577287B CN 104577287 B CN104577287 B CN 104577287B CN 201510035102 A CN201510035102 A CN 201510035102A CN 104577287 B CN104577287 B CN 104577287B
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Abstract
Divide the method for ratio the present invention relates to a kind of harmonics restraint wideband patch coupler and its adjustment work(while realize broadband and the method that second harmonic inhibits, structure includes fan-shaped patch layer, top layer medium substrate, electromagnetic belt gap layer, underlying dielectric substrate and the metal ground layer arranged successively from top to bottom；The sector patch layer includes the fan-shaped patch group that two pair radius small one and large one and central angle is 90 degree, and two fan-shaped patches per a pair of fan-shaped patch group are with origin symmetry.Output port is equipped between two neighboring sector patch；The electromagnetic belt gap layer array is disposed with N*N rectangle good conductor patch, and N is the positive integer more than or equal to 2；The center that the underlying dielectric substrate corresponds to rectangle good conductor patch is equipped with metallic vias, and metallic vias is through underlying dielectric substrate and is connect respectively with rectangle good conductor patch and metal ground layer.The present invention can realize that broadband and second harmonic inhibit the arbitrary centimetre ratio output of function simultaneously.
Description
Technical field
The present invention relates to the coupler used in microwave communication, broadband and second harmonic can be achieved at the same time in more particularly to one kind
The arbitrary work(point inhibited is than the harmonics restraint wideband patch coupler of output.
Background technology
Coupler is a kind of directive power divider of tool, it can be from the forward wave of main Transmission system according to not
In proportion power distribution to coupled end.In power gain controller part, balance amplifier, modulation-demodulation circuit, phased array thunder
Up in the feeding network of system, it is required for using coupler.
Nowadays the method for being used for realizing broadband and harmonics restraint is mainly the following：
First, a kind of orthocoupler of the structure based on paster structure of design, to realize the expansion of bandwidth, it is by four circles
Heart angle is 90 °, and the adjustable fan-shaped metal patch of radius is formed.But this design can not inhibit passing through for harmonic wave simultaneously.
Second is that designing a kind of branch line coupler of structure based on electro-magnetic bandgap, the inhibition function of harmonic wave is realized.Due to slow
The presence of wave effect, the size of this design are also further reduced.But this design sacrifices the bandwidth of coupler.
Third, a kind of coupler using lump original paper band resistance resonator of design, because having harmonic wave in itself with resistance resonator
Inhibit function, it is real by realizing the required high pass of harmonics restraint and low-pass characteristic using band resistance resonator in coupler
The function of existing harmonics restraint.
Fourth, using the Low ESR microstrip line of one section of coupling line partial insertion conventional coupler, due to intrinsic humorous in odd times
The asymmetry of wave can realize the harmonics restraint of coupler.
However, the research of above broadband and the arbitrary output work of harmonics restraint point than coupler can only single realization broadband
Or one of harmonic restraining function, both fail to realize simultaneously and meet arbitrary work(point and compare output function.Therefore, it is necessary to a kind of energy
Realize that broadband and second harmonic inhibit and export the coupler structure that arbitrary work(divides ratio simultaneously.
Invention content
It is insufficient it is an object of the invention to overcome present in above-mentioned prior art construction, and provide it is a kind of it is simple in structure,
Rationally, it can realize that broadband and second harmonic inhibit the arbitrary centimetre of function to be coupled than the harmonics restraint wideband patch of output simultaneously
Device.
The object of the present invention is achieved like this：
A kind of harmonics restraint wideband patch coupler, it is characterized in that, including arrange successively from top to bottom fan-shaped patch layer,
Top layer medium substrate, electromagnetic belt gap layer, underlying dielectric substrate and metal ground layer；The sector patch layer includes two pair radius one
Big one is small and central angle is 90 ° of fan-shaped patch group, and two fan-shaped patches per a pair of fan-shaped patch group are with origin symmetry.Phase
Output port is equipped between adjacent two fan-shaped patches；The electromagnetic belt gap layer array is disposed with N*N rectangle good conductor patch, N
To be more than or equal to 2 positive integer；The center that the underlying dielectric substrate corresponds to rectangle good conductor patch is equipped with metallic vias, metal
Via is through underlying dielectric substrate and is connect respectively with rectangle good conductor patch and metal ground layer.
The radius of above-mentioned two pairs of fan-shaped patch groups totally four fan-shaped patches is adjustable, and central angle is 90 °, to realize substantially just
Hand over coupler function.Rectangle good conductor patch collectively forms mushroom-shaped structure with metallic vias, to realize proposed coupling simultaneously
The broadband of clutch and second harmonic inhibit function.The center of the mushroom-shaped structure is located at the center location of rectangle good conductor patch
Underface, entire coupler are suppressed by top layer dielectric substrate and underlying dielectric substrate, and coupling is proposed so as to realize simultaneously
The broadband of device and second harmonic inhibit function.It can realize that broadband and second harmonic inhibit simultaneously present invention firstly provides a kind of, and
The patch coupler that arbitrary work(divides ratio is exported, greatly reduces the different costs and complexity for requiring coupler of design.Available for C
The wireless communication systems such as band satellite television broadcasting and very small aperture terminal.
Above-mentioned sector patch layer includes the fan-shaped patch group that two pair radius small one and large one and central angle is 90 °, per a pair of
The fan-shaped patch of two of fan-shaped patch group is with origin symmetry, that is to say, that patch coupler is not waited including two pair radius and its center of circle
Angle is equal to four of 90 ° fan-shaped compositions, radius it is equal it is fan-shaped with origin symmetry and radius it is adjustable, to change energy drag ratio
Size, so as to influence port work(point than output.The sector radius joint effect coupler working frequency, coupler working frequency
It can reduce with the increase of fan-shaped radius.
The mushroom-shaped structure is a kind of electromagnetic bandgap structure, has stopband effect for the signal of specific frequency, so as to
Realize the inhibition function of second harmonic.In addition, its generated Slow-wave effect ensure that proposed coupler size not into
One step increases.Due to top layer medium substrate（Second layer dielectric substrate）Intervention, for fan-shaped patch layer（Patch coupler）Into
Row impedance matching, so as to fulfill broadband feature.
The purpose of the present invention can also use following technical measures to solve：
As a kind of more specific scheme, there are four the output port of the sector patch layer is set, each output port difference
It is connected with 50 ohm microstrips.
The N is 4 or 5.
Two pairs of fan-shaped patch components are not the first fan-shaped patch group and the second fan-shaped patch group, the first sector patch group
The radius R1 of middle sector patch is 4.9mm, R2 6.6mm, and the radius R1 of fan-shaped patch is 1.3mm in the second fan-shaped patch group,
R2 is 4.9mm.Arbitrary work(point can be realized than output in arbitrary single frequency by adjusting the radius size of fan-shaped patch.
The rectangle good conductor patch is in the square that the length of side is Wp, and the Wp of fan-shaped patch is in the first fan-shaped patch group
2.8mm, the Wp of fan-shaped patch is 2.6mm in the second fan-shaped patch group, in two fan-shaped patch groups between rectangle good conductor patch between
Gap G is 0.8mm.
The radius Rv of the metallic vias is 0.25mm
The rectangle good conductor patch connects and composes mushroom-shaped structure, rectangle good conductor patch and metal mistake with metallic vias
Thickness after the connection of hole is equal to underlying dielectric substrate thickness h, h 0.508mm.Using the patch coupler of mushroom-shaped structure, energy
Realize that broadband and second harmonic inhibit and realize the output of arbitrary power-division ratios simultaneously.Single rectangle is good in mushroom-shaped structure leads
Show consideration for the distance between the area of piece, rectangle good conductor patch, the diameter of metallic vias is controlled variable, to realize simultaneously pair
The broadband of ratio and second harmonic is divided to inhibit function in proposed coupler difference work(.
The top layer medium substrate and underlying dielectric substrate thickness are equal and suppress integral.
A kind of harmonics restraint wideband patch coupler adjustment work(divides the method for ratio, it is characterized in that, by adjusting two pairs of sectors
The radii ratio of patch group can control the arbitrary work(of coupler to divide the output of ratio.
A kind of harmonics restraint wideband patch coupler realizes broadband and the method that second harmonic inhibits simultaneously, it is characterized in that,
When the work(of needs is divided to than being obtained by the radii ratio of two pairs of fan-shaped patch groups of adjustment, the length of side of change rectangle good conductor patch,
Gap between adjacent rectangle good conductor, the radius of metallic vias, rectangle good conductor patch quantity value can realize coupling simultaneously
The function that device broadband and second harmonic inhibit so that the mushroom-shaped structure that rectangle good conductor patch is connected and composed with metallic vias
The working frequency of influence coupler realizes that signal inhibits without influencing power splitting/synthesis network, while in second harmonic frequency.
Compared with prior art, implement the patch coupler of the mushroom-shaped structure employed in the present invention, there is following effect
Fruit：
1st, the signal of specific frequency can be caused to pass through coupling using mushroom-shaped structure below the dielectric substrate of patch
Device, while inhibit the signal of specific frequency by coupler, so as to fulfill harmonic restraining function.It can be by adjusting top layer substrate
On four central angles be 90 ° fan-shaped radius realize arbitrary work(point than output.
2nd, the mushroom-shaped structure is electromagnetic bandgap structure, due to Slow-wave effect therein, the electrical length in unit length
Longer, thus the size of designed circuit will not further increase.
3rd, with the previous used branch cable architecture of patch substitution, make structure simpler, cost is lower.
4th, for other structure, the present invention can provide wider relative bandwidth.
5th, for branch's cable architecture, the present invention can realize larger work(point ratio, and coefficient of coup maximum can
To reach 6 dB.
6th, for other microstrip line construction, the present invention uses in the case of being more suitable for high working frequency.
Description of the drawings
Fig. 1 is one embodiment of the invention structure diagram.
Fig. 2 is fan-shaped patch layer and the location diagram of mushroom-shaped structure under vertical view state of the present invention.
Fig. 3 is side structure schematic diagram of the present invention.
Fig. 4 is the fan-shaped patch layer structure diagram of the present invention.
Fig. 5 is electromagnetic belt gap layer structure diagram of the present invention.
Fig. 6 is the side perspective view to reflect the mushroom-shaped structure of the present invention.
Fig. 7 is to invent the emulation of embodiment coefficient of coup comparison and measured result comparison diagram.
Fig. 8 is to invent the emulation of embodiment phase difference comparison and measured result comparison diagram.
Fig. 9 is the emulation of another embodiment coefficient of coup comparison of invention and measured result comparison diagram.
Figure 10 is the emulation of another embodiment phase difference comparison of invention and measured result comparison diagram.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, to the embodiment of the present invention used by technical solution carry out it is clear
Clear, detailed description, described embodiment are only the part of the embodiment in the present invention, instead of all the embodiments.
Based on the embodiment of the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made other
Embodiment belongs to the protection domain of the embodiment of the present invention.
Referring to shown in Fig. 1 and Fig. 6, a kind of harmonics restraint wideband patch coupler, including the fan arranged successively from top to bottom
Shape patch layer 101, top layer medium substrate 102, electromagnetic belt gap layer 103, underlying dielectric substrate 104 and metal ground layer 105；It is described
Fan-shaped patch layer 101 includes the fan-shaped patch group 201 that two pair radius small one and large one and central angle is 90 °, fan-shaped is pasted per a pair of
Two of piece group 201 fan-shaped patches are equipped with output port 203 with origin symmetry between two neighboring sector patch；The electromagnetism
103 array of band gap layer is disposed with N*N rectangle good conductor patch 202, and N is the positive integer more than or equal to 2；The underlying dielectric base
The center that plate 104 corresponds to rectangle good conductor patch 202 is equipped with metallic vias, and metallic vias is through underlying dielectric substrate 104 and divides
It is not connect with rectangle good conductor patch 202 and metal ground layer 105.
There are four the output port 203 of the sector patch layer 101 is set, each output port 203 is connected separately with 50 ohm
Microstrip line（Connect microstrip line）.
The N is 4 or 5.
The described two pairs fan-shaped respectively first fan-shaped patch groups of patch groups 201 and the second fan-shaped patch group, the first fan-shaped patch
The radius R1 of fan-shaped patch is 4.9mm in piece group, R2 6.6mm, and the radius R1 of fan-shaped patch is in the second fan-shaped patch group
1.3mm, R2 4.9mm.The rectangle good conductor patch 202 is fan-shaped in the first fan-shaped patch group in the square that the length of side is Wp
The Wp of patch is 2.8mm, and the Wp of fan-shaped patch is 2.6mm in the second fan-shaped patch group, rectangle good conductor in two fan-shaped patch groups
Clearance G is 0.8mm between patch 202.
The radius Rv of the metallic vias is 0.25mm.
The rectangle good conductor patch 202 and metallic vias connect and compose mushroom-shaped structure, rectangle good conductor patch 202 with
Thickness after metallic vias connection is equal to 104 thickness h of underlying dielectric substrate, h 0.508mm.
The top layer medium substrate 102 is equal with 104 thickness of underlying dielectric substrate and suppresses integral.
Above-mentioned top layer medium substrate 102 uses Rogers RO4003C material medium substrate of the thickness for 0.508 mm,
Dielectric constant is 3.38.Underlying dielectric substrate 104 uses Rogers RO 4003C material medium substrate of the thickness for 0.508mm,
Its dielectric constant is 3.38.Metal ground layer 105 is using the structure for being paved with good conductor.
Since the present invention is using paster structure, change the dimensional parameters in its structure, such as the size of R1, R2, Wp, G, Rv, N
The performance of the work(point ratio of coupler, broadband and second harmonic inhibition can be influenced simultaneously, therefore can be by adjusting above-mentioned size
Size come realize broadband, second harmonic inhibit, arbitrary work(point than output coupler structure.
Adjustment work(divides the method for ratio：
Change the R1 in institute proposition coupler, R2 can be used for being adjusted the power-division ratios of coupler, when R2,
Wp, G, Rv parameter constant, the size for adjusting R1 become hour, and coefficient of coup S21 will become larger, and coefficient of coup S31 will become smaller.
When R1, Wp, G, Rv parameter constant, R2 becomes hour, and coefficient of coup S21 will become smaller, and coefficient of coup S31 will become larger, thus
It can obtain, the ratio of R1 and R2 can control the arbitrary work(of coupler to divide the output of ratio.
Broadband and the method that second harmonic inhibits are realized simultaneously：
When the work(point of needs is worth to than the ratio by adjusting R1 and R2, changing the value of Wp, G, Rv, N can realize simultaneously
The function that coupler broadband and second harmonic inhibit so that mushroom-shaped structure only influences the working frequency of coupler without influencing
Power splitting/synthesis network, while realize that signal inhibits in second harmonic frequency.
Two groups of different emulation and measured result comparison is given below to show the effect for showing the present invention.
Realize that broadband and second harmonic press down simultaneously in 6.85 GHz with the present invention referring to shown in Fig. 7 and Fig. 8, showing
Function processed waits the emulation of work(point output and actual measurement comparison diagram, design example 1 output port 203 the coefficient of coup for 3.5 ±
0.5dB .Physical circuit parameter is：The mm of R1=4.9 mm, R2=6.6 mm, Wp=2.8 mm, G=0.8, Rv=0.25
Mm, N=4.The coupler working frequency is 5.6 GHz-8.1 GHz, relative bandwidth 36.5%z.In this operating frequency range
Interior, phase difference is 89 ° ± 2 ° between port 3 and port 2, and amplitude imbalance degree is less than 1 dB between port 2 and port 3.It is designed
Circuit shows that good second harmonic inhibits function, and the harmonic restraining function of 14db is realized and lack in second harmonic frequency.
Broadband and two are realized simultaneously in higher operational frequency point with the present invention referring to shown in Fig. 9 and Figure 10, showing
Subharmonic inhibits emulation of the big work(point than output of function and actual measurement comparison diagram, design example two to provide the coupling of 6dB in 2 ports
Coefficient (coupling range is 6.5 ± 0.5dB).The parameter of circuit is in figure：The mm of R1=1.3 mm, R2=6.1, Wp=2.6
The mm of mm, G=0.8 mm, Rv=0.25, N=5.The coupler working frequency is 5 GHz-8 GHz, and relative bandwidth is
46.2%.In this operating frequency range, phase difference is 90 ° ± 6 ° between port 3 and port 2.In second harmonic frequency range
Interior, designed circuit shows that good second harmonic inhibits function, realizes and lack the harmonic restraining function of 15dB, it is seen that this
Invention can be used to realize high coupling coefficient output.
Wherein, in Fig. 7 and Figure 10, S-parameters refers to the coefficient of coup, and Frequency refers to frequency, Phase
Difference（Degree）Refer to phase difference（Degree）, Simulated refers to emulating, and Measured refers to reality.
Above result baseplate material be Rogers RO4003C, dielectric constant 3.38, substrate thickness 0.508
It is measured under the true environment of mm by Network Analyzer.By being emulated above with test comparison figure it can be found that emulating and surveying
The goodness of fit of curve is higher, and it is practical to show the solution of the present invention.
It is that a kind of to the present invention can realize broadband simultaneously and second harmonic inhibits and provide arbitrary work(not to be waited to divide than defeated above
The novel coupler gone out provides being discussed in detail for embodiment, while includes realization and adjust working frequency and in relevant work frequency
Rate adjusts the method that its work(divides ratio.The principle of the present invention and embodiment are illustrated with specific case herein, more than
The explanation of embodiment is merely used to help understand the method and its core concept of the present invention.
For those of ordinary skill in the art, thought according to the present invention, in specific embodiments and applications
There will be changes, to sum up, the content of the present specification should not be construed as limiting the invention.
Claims (2)
1. a kind of harmonics restraint wideband patch coupler, it is characterized in that, including the fan-shaped patch layer arranged successively from top to bottom
（101）, top layer medium substrate（102）, electromagnetic belt gap layer（103）, underlying dielectric substrate（104）And metal ground layer（105）；
The sector patch layer（101）It is 90 ° of fan-shaped patch group including two pair radius small one and large one and central angle（201）,
Per a pair of fan-shaped patch group（201）Two fan-shaped patches with origin symmetry, be equipped with output terminal between two neighboring sector patch
Mouthful（203）；
The electromagnetic belt gap layer（103）Array is disposed with N*N rectangle good conductor patch（202）, N is 4 or 5；
The underlying dielectric substrate（104）Corresponding rectangle good conductor patch（202）Center be equipped with metallic vias, metallic vias passes through
Wear underlying dielectric substrate（104）And respectively with rectangle good conductor patch（202）And metal ground layer（105）Connection；
The sector patch layer（101）Output port（203）There are four if, each output port（203）It is connected separately with 50 Europe
Nurse microstrip line；
Described two pairs fan-shaped patch groups（201）Respectively first fan-shaped patch group and the second fan-shaped patch group, the first fan-shaped patch
The radius R of fan-shaped patch in group1For 1.3mm, R2For 6.1mm, the radius R of fan-shaped patch in the second fan-shaped patch group1For 4.9mm,
R2For 6.6mm；
The rectangle good conductor patch（202）It is W in the length of sidepSquare, W in the first fan-shaped patch grouppFor 2.6mm, the second fan
W in fan-shaped patch in shape patch grouppFor 2.8mm, two fan-shaped patch group rectangle good conductor patches（202）Between clearance G be
0.8mm；
The radius R of the metallic viasvFor 0.25mm；
The rectangle good conductor patch（202）Mushroom-shaped structure, rectangle good conductor patch are connected and composed with metallic vias（202）With
Thickness after metallic vias connection is equal to underlying dielectric substrate（104）Thickness h, h 0.508mm；
The top layer medium substrate（102）With underlying dielectric substrate（104）Thickness is equal and suppresses integral.
2. a kind of wideband patch of harmonics restraint according to claim 1 coupler adjustment work(divides the method for ratio, it is characterized in that, lead to
Cross the fan-shaped patch group of two pairs of adjustment（201）Radii ratio the arbitrary work(of coupler can be controlled to divide the output of ratio；When the work(of needs
It is divided to than by two pairs of fan-shaped patch groups of adjustment（201）Radii ratio when obtaining, change rectangle good conductor patch（202）The length of side,
Gap, the radius of metallic vias, rectangle good conductor patch between adjacent rectangle good conductor（202）The value of quantity can be realized simultaneously
The function that coupler broadband and second harmonic inhibit so that rectangle good conductor patch（202）The mushroom connected and composed with metallic vias
Mushroom type structure only influences the working frequency of coupler, without influencing power splitting/synthesis network, while realizes and believes in second harmonic frequency
Number inhibit.
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| CN201510035102.1A CN104577287B (en) | 2015-01-23 | 2015-01-23 | Harmonics restraint wideband patch coupler and its adjustment work(divide the method for ratio while realize broadband and the method that second harmonic inhibits |
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| US10622736B2 (en) * | 2018-07-10 | 2020-04-14 | Futurewei Technologies, Inc. | Harmonic termination integrated passive device |
| CN111416183B (en) * | 2020-03-19 | 2021-10-29 | 南京智能高端装备产业研究院有限公司 | Novel single-passband filter coupler adopting double-layer circular patches |
| CN112072249A (en) * | 2020-07-20 | 2020-12-11 | 西安电子科技大学 | Broadband slow wave substrate integrated waveguide with high slow wave coefficient |
| CN113285187A (en) * | 2021-05-13 | 2021-08-20 | 上海大学 | Miniaturized low-pass filter with slow-wave characteristic and inverted mushroom nail structure |
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| WO2012093603A1 (en) * | 2011-01-04 | 2012-07-12 | 日本電気株式会社 | Electromagnetic wave transmission sheet |
| CN102510658A (en) * | 2011-09-26 | 2012-06-20 | 北京邮电大学 | Implementation method of H-type groove fractal UC-EBG (Uniplanar Compact Electromagnetic Band Gap) structure oriented to multifrequency antenna substrate |
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| CN204391235U (en) * | 2015-01-23 | 2015-06-10 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Harmonics restraint wideband patch coupler |
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