CN109390646A - Based on the capacitively coupled ultra-wide band radio-frequency combiner of Double-layered strip line - Google Patents
Based on the capacitively coupled ultra-wide band radio-frequency combiner of Double-layered strip line Download PDFInfo
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- CN109390646A CN109390646A CN201811473687.5A CN201811473687A CN109390646A CN 109390646 A CN109390646 A CN 109390646A CN 201811473687 A CN201811473687 A CN 201811473687A CN 109390646 A CN109390646 A CN 109390646A
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- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims description 47
- 230000005540 biological transmission Effects 0.000 claims description 17
- 239000000725 suspension Substances 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 12
- 230000001939 inductive effect Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000004044 response Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
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- 238000004088 simulation Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
- H01P1/2135—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using strip line filters
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Abstract
The invention discloses one kind to be based on the capacitively coupled ultra-wide band radio-frequency combiner of Double-layered strip line.Combiner of the present invention is including including one group of pass filter including high-pass filter and low-pass filter with common end, the high-pass filter is made of one group of open circuit step electric impedance resonator and one group of short-circuit line resonator, realizes capacitive coupling by broadside coupled strip line structure respectively between each resonator of the high-pass filter and between resonator and common end.Compared with prior art, proposed by the invention that ultrabroad band and ultra high power capacity are had based on the capacitively coupled ultra-wide band radio-frequency combiner of Double-layered strip line, and have small in size, at low cost, production is simple, the advantages of being easy debugging, be convenient for mass production.
Description
Technical field
The present invention relates to a kind of radio frequency combiner more particularly to a kind of ultra-wide band radio-frequency combinings that can cover ultrabroad band
Device.
Background technique
With the extensive use and development of the communication technology, increasingly higher demands also proposed to filter.As filtering
One kind of device, combiner are indispensable original parts in communication system, are widely used in modern wireless communications networks, in base
Stand, antenna system, tower put and indoor radio frequency covering system in, have a large amount of combiner.The major function of combiner be by
The radiofrequency signal of two or more different frequencies synthesizes signal all the way, or will all the way include two or more different frequencies
Radiofrequency signal be separated into the individual signal of two-way/multichannel.It is more next with the continuous improvement to cordless communication network capacity requirement
More frequency spectrum resources, which is planned, to come into operation, and therefore, also proposed new requirement: broadband, high power, low damage to combiner
Consumption, small in size, light-weight, low cost, convenient for mass production, etc..
The design of current most of combiners is in such a way that multiple band logical cavity body filters couple common end.However,
When frequency band is too wide, the bandpass filter of cavity body structure is relatively difficult to achieve, and therefore, in order to expand the bandwidth of combiner, use is band-like
Line low pass or high-pass filter just become preferable design scheme.Currently, in broadband combiner in the market, also useful band line
The design of low pass and high pass.However, existing limited using the generally existing bandwidth of combiner realized with the high/low bandpass filter of line
Problem, such as the achievable bandwidth of 2 combiners of existing single circuit form are generally 698-960MHz and 1700-
2200MHz has been unsatisfactory for the frequency requirement of most of countries and regions.Existing frequency planning has contained low frequency end
The 2700MHz of 600MHz and front end, and 6GHz frequency below has been contained in the frequency spectrum of 5G.In addition, existing use
That there is also power capacities is smaller for the combiner realized with the high/low bandpass filter of line, it is difficult to meet high-power application requirement.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide one kind to be held based on Double-layered strip line
Property coupling ultra-wide band radio-frequency combiner, which can cover broader frequency band, have higher power capacity, while also having
The advantages of having small in size, light-weight, low cost, being convenient for mass production.
It is proposed by the invention based on the capacitively coupled ultra-wide band radio-frequency combiner of Double-layered strip line, including there are a public affairs
What is held altogether includes one group of pass filter including high-pass filter and low-pass filter, and the high-pass filter is by one group of open circuit
Step electric impedance resonator and one group of short-circuit line resonator are constituted, between each resonator of the high-pass filter and resonator and public
Capacitive coupling is realized by broadside coupled strip line structure respectively between end altogether.
Structure implementation as one preferred, the combiner include by grounded metal top cover and grounded metal bottom plate packet
Cavity made of folder, and the circuit part that suspension is fixed in the cavity；The circuit part includes constituting the high pass
The one group of open circuit step electric impedance resonator and one group of short-circuit line resonator of filter；The open circuit step electric impedance resonator is by one section
Series connection high resistant line and open circuit low-resistance line pass through the solid dielectric supporting element that is fixedly connected with grounded metal top cover/grounded metal bottom plate
Suspension, which is fixed in the cavity, to be constituted；The short-circuit line resonator is by one section of high resistant line and grounded metal top cover/grounded metal
The metallic supports suspension that bottom plate is fixedly connected, which is fixed in the cavity, to be constituted；One of every transmission line on each resonator
Part and a part of the transmission line on other resonators or common end non-contactly arranged superposed up and down, thus and grounded metal
Top cover, grounded metal bottom plate are formed together the broadside coupled strip line structure.
Further, the low-pass filter is made of one group of open circuit step electric impedance resonator, the low-pass filter it is each
It is realized respectively by high resistant transmission line between resonator and between resonator and common end inductive coupled.
Further, the circuit part further includes the another set open circuit stepped impedance for constituting the low-pass filter
Resonator, the open circuit step electric impedance resonator by one-stage serial high resistant line and open circuit low-resistance line by with grounded metal top cover/
The solid dielectric supporting element suspension that grounded metal bottom plate is fixedly connected, which is fixed in the cavity, to be constituted.
Still further, the open circuit in grounded metal top cover or grounded metal bottom plate and each open circuit step electric impedance resonator
Low-resistance line is provided with a series of boss at corresponding position, for reducing the ground distance of each open circuit low-resistance line.
Preferably, which is two road combiners.It is further preferred that the passband of the two roads combiner is DC-
960MHz/1695-2700MHz or DC-2700MHz/3500-6000MHz, high-pass filter therein are hindered by an open circuit ladder
Antiresonance device and a short-circuit line resonator are constituted, and low-pass filter is made of three open circuit step electric impedance resonators.
Preferably, all components in the circuit part are cut by the metal plate of same thickness.
Preferably, the solid dielectric supporting element is made of media support, medium screw and medium washer, the medium branch
One end of frame can be fixedly connected with grounded metal top cover/grounded metal bottom plate, and the other end of media support is provided with and is given an account of
The aperture of the threaded hole of matter screw adaptation, the medium washer is provided with threaded hole between the threaded hole aperture and media support
Between the diameter of one end.It is further preferred that the medium washer has multiple and different thickness specifications.
Compared with prior art, technical solution of the present invention has the advantages that
Combiner of the present invention has ultrabroad band, and has high power, small in size, at low cost, and production is simple, is easy debugging, just
In the mass production the advantages of.
Detailed description of the invention
Fig. 1 is the Structure explosion diagram of one specific embodiment of ultra-wide band radio-frequency combiner of the present invention；
Fig. 2 is that Fig. 1 ultra-wide band radio-frequency combiner does not install the top view in the case of top cover；
Fig. 3 is the structural schematic diagram of circuit part in Fig. 1 ultra-wide band radio-frequency combiner cavity；
Fig. 4 is the ADS circuit model of Fig. 1 ultra-wide band radio-frequency combiner；
Fig. 5 is the ADS emulation S- parameter response curve for the two road combiners that passband is DC-960MHz/1695-2700MHz；
Fig. 6 is the ADS emulation S- parameter response curve for the two road combiners that passband is DC-2700MHz/3500-6000MHz；
Fig. 7 is the S- parameter response curve for the two road combiner material object prototypes that passband is DC-960MHz/1695-2700MHz.
It is marked in figure containing the following drawings:
1, bottom plate, 2, top cover, 3, common end, 4, high pass input/output terminal, 5, low pass input/output terminal, 6, high-pass filter,
7, low-pass filter, 8, solid dielectric supporting element, 101, boss, 601, open circuit step electric impedance resonator, 602, short-circuit line resonance
Device, 603, broadside coupled strip line structure, 701 ~ 703, open circuit step electric impedance resonator, 704, high resistant transmission line, 801, medium branch
Frame, 802, medium screw, 803, medium washer.
Specific embodiment
For bandwidth present in the prior art and the deficiency in terms of power capacity, the present invention proposes a kind of based on bilayer zone
The capacitively coupled ultra-wide band radio-frequency combiner of shape line.To solve the problems, such as bandwidth, the present invention uses high-pass filter and low-pass filtering
The combiner scheme of device connection common end；For the ease of realizing the capacitive coupling in high-pass filter, the present invention uses bilayer zone
Cable architecture；In order to realize the requirement of high power transmission, the strip line transmission lines circuit in the present invention, which uses, has certain thickness (general
For the metallic conductor of 1-2mm).
Specifically, it is proposed by the invention based on the capacitively coupled ultra-wide band radio-frequency combiner of Double-layered strip line, including
Include one group of pass filter including high-pass filter and low-pass filter, the high-pass filter with common end
Be made of one group of open circuit step electric impedance resonator and one group of short-circuit line resonator, between each resonator of the high-pass filter and
Capacitive coupling is realized by broadside coupled strip line structure respectively between resonator and common end.
In order to enable more compact structure, and sufficiently reduce production cost, structure implementation as one preferred, the conjunction
Road device includes cavity made of being sandwiched as grounded metal top cover and grounded metal bottom plate, and suspension is fixed in the cavity
Circuit part；The circuit part include constitute the high-pass filter one group of open circuit step electric impedance resonator and one group short circuit
Line resonator；The open circuit step electric impedance resonator by one-stage serial high resistant line and open circuit low-resistance line by with grounded metal top
The solid dielectric supporting element suspension that lid/grounded metal bottom plate is fixedly connected, which is fixed in the cavity, to be constituted；The short-circuit line is humorous
The metallic supports suspension that vibration device is fixedly connected by one section of high resistant line with grounded metal top cover/grounded metal bottom plate is fixed on described
It is constituted in cavity；The one of a part of every transmission line on each resonator and other resonators or the transmission line on common end
Part non-contactly arranged superposed up and down, to be formed together with grounded metal top cover, grounded metal bottom plate described broadside coupled
Strip line structure.
Low-pass filter in combiner of the present invention can use existing cavity body structure, single layer strip line structure, bilayer zone
Cable architecture etc., in order to further increase combiner bandwidth while reduce production cost, it is preferable that the low-pass filter is by one group
Step electric impedance resonator of opening a way is constituted, and is led to respectively between each resonator of the low-pass filter and between resonator and common end
It is inductive coupled to cross the realization of high resistant transmission line.On this basis, in order to enable product structure is more compact, while production difficulty is reduced,
The open circuit of composition low-pass filter is realized preferably with structure identical with the open circuit step electric impedance resonator in high-pass part
Step electric impedance resonator, that is, the circuit part further includes the another set open circuit stepped impedance for constituting the low-pass filter
Resonator, these open circuit step electric impedance resonators by one-stage serial high resistant line and open a way low-resistance line by with grounded metal top cover/
The solid dielectric supporting element suspension that grounded metal bottom plate is fixedly connected, which is fixed in the cavity, to be constituted.
In order to meet ultra wideband, the low-resistance open-circuit line of the open circuit step electric impedance resonator in above-mentioned high pass and low pass
Area requirements are larger, can mutually overlap mutually with other circuits, to solve this problem, the present invention is further in these low-resistance open-circuit lines
Respective chamber bottom is provided with a series of boss, for reduce each open circuit low-resistance line at a distance from cavity bottom (i.e. with ground away from
From), to reduce the area of these open circuit low-resistance lines, so that combiner structure is more compact, it is easy to accomplish.
For the ease of public understanding, below with a specific embodiment and in conjunction with attached drawing come to technical solution of the present invention into
Row is described in detail:
Combiner in the present embodiment is two road combiners, and basic structure is as shown in Figure 1, Figure 2, Figure 3 shows.The two roads combiner packet
Include the bottom plate 1 and top cover 2 and common end 3, high pass input/output terminal 4, low pass input/output terminal 5, high-pass filter of metal
6, low-pass filter 7.Bottom plate 1 and top cover 2 are fixed in conjunction with that can form closed cavity, high-pass filter 6 and the suspension of low-pass filter 7
In the cavity.
As shown in Figure 1, Figure 2, Figure 3 shows, the low-pass filter 7 in the present embodiment is by three open circuit step electric impedance resonators
701 ~ 703 three rank elliptic function low-pass filters constituted, it is inductive coupled real by high resistant transmission line 704 in low-pass filter
It is existing.High-pass filter 6 is high by a second order that step electric impedance resonator 601 and a short-circuit line resonator 602 form of opening a way
Bandpass filter passes through broadside coupled band between each resonator of the high-pass filter and resonator and common end 3 respectively
Cable architecture realizes capacitive coupling.As shown in Figure 1, Figure 2, Figure 3 shows, it opens a way step electric impedance resonator 601 and short-circuit line resonator 602
A part of every transmission line and a part of the transmission line on other resonators or common end 3 non-contactly be overlapped cloth up and down
It sets, so that casting coping 2, the metal base plate 1 with ground connection are formed together broadside coupled strip line structure 603.Line resonator by with
The metallic supports suspension that the metal base plate 1 of ground connection is fixedly connected is fixed in the cavity, while realizing the electricity between ground
Connection, to form the short-circuit line resonator 602.Open circuit step electric impedance resonator 601 and open circuit step electric impedance resonator 701
~ 703 are fixed in the cavity by the suspension of solid dielectric supporting element 8 being fixedly connected with grounded metal bottom plate 1, thus shape
At so-called open circuit step electric impedance resonator.
In order to as easy to produce as possible, all components of all circuit parts being suspended in the cavity in the combiner
(including open circuit step electric impedance resonator 701 ~ 703, open circuit step electric impedance resonator 601, short-circuit line resonator 602, high resistant transmission
Line 704 etc.) it is all made of the metal plate excision forming of same thickness, therefore the existing filter using PCB construction is compared, the present invention
With much bigger power capacity.
As shown in Figure 1, the present embodiment is in grounded metal bottom plate 1 and each open circuit step electric impedance resonator 601,701 ~ 703
A series of boss 101 to raise upward are provided at the corresponding position of low-resistance open-circuit line, the effect of these boss 101 is to reduce
Each low-resistance open-circuit line is at a distance from cavity bottom, to reduce each low-resistance open-circuit line area of plane, to avoid generating between circuit
Overlapping, so that the more compact structure of combiner, it is easy to accomplish.
As shown in figure 3, the solid dielectric supporting element 8 in the present embodiment is by media support 801, medium screw 802 and medium
Washer 803 is constituted, and one end of the media support 801 can be fixedly connected with grounded metal bottom plate 1, media support 801 it is another
End is provided with the threaded hole being adapted to the medium screw 802, and the aperture of the medium washer 803 is between the threaded hole aperture
It is provided with media support between the diameter of threaded hole one end.As shown in figure 3, being convenient to using this solid dielectric supporting element
It suspends high-pass filter 6 and low-pass filter 7 to be fixed in the cavity, and controls band line circuit and cavity bottom surface and cavity
Spacing between cover board and the spacing between the bilayer zone line of broadside coupled strip line structure 603.Preferably medium washer 803
Multiple and different thickness specifications is set, so as to more precisely easily adjust capacitively coupled coupling amount according to actual needs.
Utilize stripline transmission line circuit model such as Fig. 4 institute of the obtained combiner of microwave circuit simulation software ADS
Show, by adjusting the width and length and coupling spacing of transmission line, available required combiner response characteristic.Fig. 5
Show that the S- parameter that a passband based on above structure is the ultra-wide frequency combiner of DC-960MHz/1695-2700MHz is rung
Answer curve.The circuit form of Fig. 4 can be used for the broadband combiner of other different passbands, and Fig. 6 is shown based on above structure
A passband DC-2700MHz/3500-6000MHz ultra wide band combiner S- parameter response curve.
The ultra-wide frequency combiner that passband for Fig. 5 is DC-960MHz/1695-2700MHz, has made mock-up use
In the verifying circuit.On the basis of Fig. 4 circuit model, by electromagnetic-field simulation and optimization, the optimization of available combiner
The S- parameter measured result of specific structure size afterwards, actual sample is as shown in Figure 7.
Above example is two road combiners, and the case where more multi-circuit combiner is similar, and details are not described herein again.
In summary, compared with prior art, proposed by the invention to be penetrated based on the capacitively coupled ultra wide band of Double-layered strip line
Frequency combiner has ultrabroad band and ultra high power capacity, and has small in size, and at low cost, production is simple, is easy debugging, just
In the mass production the advantages of.
Claims (10)
1. the capacitively coupled ultra-wide band radio-frequency combiner of Double-layered strip line is based on, including having filtering comprising high pass for a common end
One group of pass filter including wave device and low-pass filter, which is characterized in that the high-pass filter is by one group of open circuit ladder
Electric impedance resonator and one group of short-circuit line resonator are constituted, between each resonator of the high-pass filter and resonator and common end
Between respectively by broadside coupled strip line structure realize capacitive coupling.
2. ultra-wide band radio-frequency combiner as described in claim 1, which is characterized in that the combiner include by grounded metal top cover and
Cavity made of grounded metal bottom plate sandwiches, and the circuit part that suspension is fixed in the cavity；The circuit portion subpackage
Include the one group of open circuit step electric impedance resonator and one group of short-circuit line resonator for constituting the high-pass filter；The open circuit ladder resistance
Antiresonance device is by one-stage serial high resistant line and open circuit low-resistance line by being fixedly connected with grounded metal top cover/grounded metal bottom plate
The suspension of solid dielectric supporting element, which is fixed in the cavity, to be constituted；The short-circuit line resonator is by one section of high resistant line and grounded metal
The metallic supports suspension that top cover/grounded metal bottom plate is fixedly connected, which is fixed in the cavity, to be constituted；On each resonator
A part of a part of every transmission line and other resonators or the transmission line on common end non-contactly arranged superposed up and down,
To be formed together the broadside coupled strip line structure with grounded metal top cover, grounded metal bottom plate.
3. ultra-wide band radio-frequency combiner as claimed in claim 2, which is characterized in that the low-pass filter is by one group of open circuit ladder
Electric impedance resonator is constituted, and is passed respectively by high resistant between each resonator of the low-pass filter and between resonator and common end
Defeated line is realized inductive coupled.
4. ultra-wide band radio-frequency combiner as claimed in claim 3, which is characterized in that the circuit part further includes that composition is described low
The another set of bandpass filter is opened a way step electric impedance resonator, the open circuit step electric impedance resonator by one-stage serial high resistant line with
Open circuit low-resistance line is fixed on institute by the solid dielectric supporting element suspension being fixedly connected with grounded metal top cover/grounded metal bottom plate
It states in cavity and constitutes.
5. ultra-wide band radio-frequency combiner as claimed in claim 4, which is characterized in that in grounded metal top cover or grounded metal bottom plate
A series of boss are provided at position corresponding with the open circuit low-resistance line in each open circuit step electric impedance resonator, it is each for reducing
The ground distance of open circuit low-resistance line.
6. ultra-wide band radio-frequency combiner as claimed in claim 5, which is characterized in that the combiner is two road combiners.
7. ultra-wide band radio-frequency combiner as claimed in claim 6, which is characterized in that the passband of the two roads combiner is DC-
960MHz/1695-2700MHz or DC-2700MHz/3500-6000MHz, high-pass filter therein are hindered by an open circuit ladder
Antiresonance device and a short-circuit line resonator are constituted, and low-pass filter is made of three open circuit step electric impedance resonators.
8. ultra-wide band radio-frequency combiner as claimed in claim 4, which is characterized in that all components in the circuit part by
The metal plate of same thickness is cut.
9. ultra-wide band radio-frequency combiner as claimed in claim 2, which is characterized in that the solid dielectric supporting element is by medium branch
Frame, medium screw and medium washer are constituted, and one end of the media support can be fixed with grounded metal top cover/grounded metal bottom plate
Connection, the other end of media support are provided with the threaded hole being adapted to the medium screw, the aperture of the medium washer between
The threaded hole aperture and media support are provided between the diameter of threaded hole one end.
10. ultra-wide band radio-frequency combiner as claimed in claim 9, which is characterized in that the medium washer has multiple and different
Thickness specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473687.5A CN109390646A (en) | 2018-12-04 | 2018-12-04 | Based on the capacitively coupled ultra-wide band radio-frequency combiner of Double-layered strip line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811473687.5A CN109390646A (en) | 2018-12-04 | 2018-12-04 | Based on the capacitively coupled ultra-wide band radio-frequency combiner of Double-layered strip line |
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| CN201811473687.5A Pending CN109390646A (en) | 2018-12-04 | 2018-12-04 | Based on the capacitively coupled ultra-wide band radio-frequency combiner of Double-layered strip line |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416676A (en) * | 2019-08-01 | 2019-11-05 | 京信通信技术(广州)有限公司 | Combiner |
| CN112864555A (en) * | 2021-01-25 | 2021-05-28 | 南通大学 | Suspension strip line cavity combiner with uniform impedance branch loading |
| CN113922019A (en) * | 2020-07-09 | 2022-01-11 | 大富科技(安徽)股份有限公司 | Combiner and communication equipment |
| CN113922028A (en) * | 2021-09-26 | 2022-01-11 | 合肥海特微波科技有限公司 | 5G high-frequency capacity-expansion multi-network system platform for suppressing low-frequency multiple harmonics |
| CN113948839A (en) * | 2021-09-24 | 2022-01-18 | 武汉凡谷陶瓷材料有限公司 | Low-pass filter |
| CN115377636A (en) * | 2022-08-19 | 2022-11-22 | 昆山立讯射频科技有限公司 | Filter and method for manufacturing the same |
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| CN110416676A (en) * | 2019-08-01 | 2019-11-05 | 京信通信技术(广州)有限公司 | Combiner |
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| CN113948839A (en) * | 2021-09-24 | 2022-01-18 | 武汉凡谷陶瓷材料有限公司 | Low-pass filter |
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| CN113922028A (en) * | 2021-09-26 | 2022-01-11 | 合肥海特微波科技有限公司 | 5G high-frequency capacity-expansion multi-network system platform for suppressing low-frequency multiple harmonics |
| CN115377636A (en) * | 2022-08-19 | 2022-11-22 | 昆山立讯射频科技有限公司 | Filter and method for manufacturing the same |
| CN115377636B (en) * | 2022-08-19 | 2023-12-15 | 苏州立讯技术有限公司 | Filter and method for manufacturing the same |
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Application publication date: 20190226 |