CN207690976U - A kind of ellipse sews flexible waveguide - Google Patents
A kind of ellipse sews flexible waveguide Download PDFInfo
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- CN207690976U CN207690976U CN201721572834.5U CN201721572834U CN207690976U CN 207690976 U CN207690976 U CN 207690976U CN 201721572834 U CN201721572834 U CN 201721572834U CN 207690976 U CN207690976 U CN 207690976U
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Abstract
The utility model discloses a kind of ellipses to sew flexible waveguide, including oval metallic waveguide and the oversheath being set in outside oval metallic waveguide, oval metallic waveguide uses the bellows that embossing moulding process is formed, and the cross section of oval metallic waveguide is in ellipticity, it is axially arranged with that a row is equally distributed to sew hole group along oval metallic waveguide, it includes that X is arranged and to sew hole on the wave crest of oval metallic waveguide that every group, which is sewed hole group, sew hole using it is rectangular sew hole, circle sews hole or ellipse sews hole；The applicable frequency range of the utility model is high, transmission loss is small, and good bending property, can lopping be coiled on Electric cable coil, not only substantially increase the length of single waveguide, greatly reduce the tie point in unit distance, the communication security of waveguide, and convenient transportation are improved, is laid with simple, manpower waste is reduced, laying working efficiency is improved.
Description
Technical field
The utility model is related to wirelessly communicate and signal transmission technology field more particularly to a kind of ellipse sew flexible waveguide.
Background technology
With the development of wireless communication technique, different system needs to apply different wireless frequencies, and it is current to cause China
Wireless communication frequency resource it is very in short supply, under the premise of the wireless communication frequency bands below of 3GHz at this stage have all been saturated,
The communications industry is also being tried to explore and is seeking how to utilize the radio frequency resources of higher frequency.Currently, Ministry of Industry and Information has been sent out
Text specifies the initial frequency range of the 5th generation ternational Mobile Telecommunications system (IMT-2020), intend 3300~3600MHz and 4800~
Dispose 5G networks in two frequency ranges of 5000MHz, and domestic three big operators also while all the planning for actively carrying out 5G networks with
Deployment.In addition, being analyzed according to domestic and international industry specialists, the wireless communication frequency used needed for the communications industry in 10 years futures will reach
To 6~10GHz, therefore, the development of 6~10GHz frequency bands is also deep to be favored by the communications industry.Therefore, in future wireless system
Develop under this overall background to high-frequency, also there is great development potentiality with the mating hardware device of high-frequency network.
Currently, mostly using the transmission that leakage coaxial cable carries out signal in the wireless communication system of 3GHz or less communications bands
And covering, the architectural characteristic of radio frequency coaxial-cable determine that the cutoff frequency of 1-5/8 " radio frequency coaxial-cables is only capable of reaching
2.7GHz can only meet 3GHz or less communications bands use at this stage, and if used under 6~10GHz communications bands, just must
The coaxial cable that specification must be used smaller, but correspondingly, transmission loss can increased dramatically, and transmission range can shorten, Wu Faman
The requirement of pedal system covering.
Currently, carrying out wireless communication signal using rectangle leaky waveguide in urban track traffic vehicle-ground wireless communication system
Transmission and covering, although rectangle leaky wave conduit in terms of the transmission of signal of communication and covering be better than leakage coaxial cable, can
To meet the covering demand of wireless communication system to a certain extent.But because its rectangular section feature, rectangle leaky waveguide
Straight tube can only be made and can not be bent, be influenced by the factors such as transporting and carrying, rectangle leaky waveguide single at present is most
Length can only accomplish 12 meters or so, and when laying needs the ring flange by being arranged at rectangle leaky wave conduit both ends to be connected paragraph by paragraph
Connect, 8~14 screws need to be installed by often locating tie point, and every kilometer of tie point be about at 80 more than, also mean that every paving
If one kilometer of rectangle leaky waveguide just needs to install thousand screws, not only construction task is heavy, but also tie point is excessively
Great hidden danger is caused to the communication security of entire communication network, meanwhile, it is long by 12 meters in the narrow environments such as subway tunnel
The leaky wave conduit of degree is carried to trackside and is inconvenient, and cannot be hoisted to trackside at disk as leakage coaxial cable, can only adopt
It manually carries, manpower waste is serious, and working efficiency is extremely low.
Utility model content
The purpose of this utility model is to provide a kind of ellipse and sews flexible waveguide, is applicable in that frequency range is high, and transmission loss is small, and is bent
Performance is good, can lopping be coiled on Electric cable coil, not only substantially increase the length of single waveguide, greatly reduce unit away from
From interior tie point, the communication security of waveguide, and convenient transportation are improved, is laid with simply, manpower waste is reduced, improves
It is laid with working efficiency.
The technical solution adopted in the utility model is：
A kind of ellipse sews flexible waveguide, including oval metallic waveguide and the outer shield that is set in outside oval metallic waveguide
Set；The ellipse metallic waveguide uses the bellows that embossing moulding process is formed, and the cross section of oval metallic waveguide is in
The major diameter of ellipticity, oval metallic waveguide cross section is set as A, and the minor axis diameter of oval metallic waveguide cross section is set as
B, and the value of A and B meets following formula (1) and formula (2) simultaneously：
A>B and A ≈ 2kB (1)
Wherein, in formula (1) and (2), k is that ellipse sews flexible waveguide diameter correction factor, the value range of k is 0.8~
1, k1Flexible waveguide embossing correction factor, k are sewed for ellipse1Value range be 0.8~1, ctFor free space electromagnetic wave propagation
Speed, fstopThe termination frequency of flexible waveguide is sewed for ellipse；
It is axially arranged with that a row is equally distributed to sew hole group along oval metallic waveguide, it includes X that every group, which is sewed hole group,
It is arranged and sews hole on the wave crest of oval metallic waveguide；As X=1, the pitch between two neighboring wave crest is set as L1, phase
Adjacent two center spacing sewed between the group of hole are set as P1, then P1=NL1, N=1,2 ... ..., n.
As X ＞ 1, X are sewed hole and are respectively distributed on X adjacent wave crest, are sewed Kong Zuzhong first for every group and are sewed
Hole and the last one sew hole between center spacing be set as L2, two adjacent groups sew the center spacing between the group of hole and are set as P2, then P2
=N ＇ L2, ＇=2 ... ... N, n, whereinM is integer, λfIt is sewed for ellipse corresponding under the frequency of use of flexible waveguide
Electromagnetic wave wavelength.
Preferably, the value range of the major diameter is 25.5mm≤A≤108.5mm, the value range of minor axis diameter
For 12.5mm≤B≤65.5mm, ellipse sews the termination frequency f of flexible waveguidestopValue range is 2.5GHz≤fstop≤
11.7GHz。
Further, the value range of the major diameter is 48.5mm≤A≤50.5mm, the value range of minor axis diameter
For 27.5mm≤B≤30.0mm, ellipse sews the termination frequency f of flexible waveguidestopValue range be 5.3GHz≤fstop≤
6.6GHz。
Preferably, hole, the rectangular embossing direction for sewing hole and oval metallic waveguide are sewed in the hole of sewing to be rectangular
Parallel side is set as long side, and long side length is set as length d, and rectangular to sew hole vertical with the oval embossing direction of metallic waveguide
While being set as broadside, width edge length is set as width c, and the rectangular junction for sewing the adjacent both sides in hole is equipped with chamfering, and chamfer radius is set as
R；The calculation formula of the length d is：
In formula (3), λ is wave in the wavelength of free space, λgFor waveguide wavelength；Wherein, waveguide wavelength λgCalculation formula
For：
In formula (4), λcFor cutoff wavelength.
Preferably, the value range of the rectangular length d for sewing hole is 3mm≤d≤15mm.
Preferably, the value range of the rectangular width c for sewing hole is 2mm≤c≤10mm.
Preferably, the value range of the rectangular chamfer radius R for sewing hole is R≤5mm.
Preferably, the hole of sewing is that circle sews hole, and the radius that circle sews hole is set as R1, 2mm≤R1≤5mm。
Preferably, the hole of sewing is that ellipse sews hole, and ellipse sews hole major diameter and is set as d1, 3mm≤d1≤
15mm, the minor axis diameter that ellipse sews hole are set as d2, 2mm≤d2≤8mm。
The utility model has the following advantages：
(1) by oval metallic waveguide be uniformly arranged in an axial direction it is multiple sew hole group, it includes X that every group, which is sewed hole group,
It is arranged and sews hole on the wave crest of oval metallic waveguide, as X=1, the pitch between two neighboring wave crest is set as L1, phase
Adjacent two center spacing sewed between the group of hole are set as P1, then P1=NL1, N=1,2 ... ..., n；As X ＞ 1, X are sewed hole
It is respectively distributed on X adjacent wave crest, every group is sewed that Kong Zuzhong first sews hole and the last one sews center between hole
Spacing is set as L2, two adjacent groups sew the center spacing between the group of hole and are set as P2, then P2=N ＇ L2, ＇=2 ... ... N, n makes this reality
It is up to 10GHz with novel frequency of use, realizes the transmission of high-frequency wireless signal, meets 5G networks and 6~10GHz
The use demand of frequency band network, and transmission loss can be substantially reduced, relative to 1-5/8, " leaky cable is in 2.4GHz
When transmission loss be as high as 6dB/100m and 1/2 " leaky cables transmission loss under 5.9GHz frequencies and be up to 35dB/100m, this
Utility model transmission loss under 5.9GHz frequencies is only 5dB/100m, transmission performance it is with the obvious advantage；
(2) by the embossing structure of oval metallic waveguide, the bending property of the utility model is greatly strengthened, makes it can
It with lopping is coiled on Electric cable coil, joint length is long, not only facilitates transport and carrying, has broken original rectangle and has sewed
Manpower wastes caused by waveguide cannot grow the limitation that section is transported and carrying, and reduces the points of the connection in unit distance
Amount, substantially increases laying efficiency, reduces manpower waste；
(3) using good, the light-weight feature of the curvature by oval metallic waveguide, the utility model is substantially increased
Adaptive capacity to environment, make the utility model that can be both fixed on the wall by suspender as leakage coaxial cable, also may be used
It is laid in orbit as rectangle leaky wave conduit, mounting means is flexible, and easy for installation；
(4) by will sew hole be designed as it is rectangular sew hole, and by the rectangular length and width value range for sewing hole point
It is not set as 3mm≤d≤15mm and 2mm≤c≤10mm, not only meets the transmission demand of high-frequency signal, but also can expire
The demand of foot difference external equipment decay indices and coupling loss；
(5) being designed as circle by will sew hole sews hole, and the radius value range that circle is sewed to hole is set as 2mm
≤R1≤ 5mm, not only meets the transmission demand of high-frequency signal, but also disclosure satisfy that different external equipment decay indices and coupling
Close the demand of loss；
(6) being designed as ellipse by will sew hole sews hole, and ellipse is sewed the long axis in hole and the value of short axle
Range is respectively set as 3mm≤d1≤ 15mm and 2mm≤d2≤ 8mm not only meets the transmission demand of high-frequency signal, but also
It disclosure satisfy that the demand of different external equipment decay indices and coupling loss.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
The structural schematic diagram of ellipse metallic waveguide when Fig. 2 is X ＞ 1 in embodiment one；
The structural schematic diagram of ellipse metallic waveguide when Fig. 3 is X=1 in embodiment one；
Fig. 4 is the rectangular structural schematic diagram for sewing hole in Fig. 2 and Fig. 3；
The structural schematic diagram of ellipse metallic waveguide when Fig. 5 is X ＞ 1 in embodiment two；
The structural schematic diagram of ellipse metallic waveguide when Fig. 6 is X=1 in embodiment two；
The structural schematic diagram of ellipse metallic waveguide when Fig. 7 is X ＞ 1 in embodiment three；
The structural schematic diagram of ellipse metallic waveguide when Fig. 8 is X=1 in embodiment three.
Reference sign：
1, oval metallic waveguide；2, hole is sewed；201, rectangular to sew hole；202, circle sews hole；203, ellipse leakage
Let out hole；3, oversheath；4, wave crest.
Specific implementation mode
As shown in Figure 1, the utility model includes oval metallic waveguide 1 and is set in outer outside oval metallic waveguide 1
Sheath 3；The bellows that oval metallic waveguide 1 is formed using embossing moulding process, the cross section of oval metallic waveguide 1 is in
The major diameter of ellipticity, 1 cross section of oval metallic waveguide is set as A, and the minor axis diameter of 1 cross section of oval metallic waveguide is set
For B, and the value of A and B meets following formula (1) and formula (2) simultaneously：
A>B and A ≈ 2kB (1)
In formula (1) and (2), k is that ellipse sews flexible waveguide diameter correction factor, and the value range of k is 0.8~1, k1For
Ellipse sews flexible waveguide embossing correction factor, k1Value range be 0.8~1, ctFor free space electromagnetic wave propagation speed,
fstopThe termination frequency of flexible waveguide is sewed for ellipse；The value range of major diameter is preferably 25.5mm≤A≤108.5mm, short
The value range of shaft diameter is preferably 12.5mm≤B≤65.5mm, and ellipse sews the termination frequency f of flexible waveguidestopValue range
Preferably 2.5GHz≤fstop≤ 11.7GHz makes the utility model can be applied not only to currently used 3G and 4G networks, more
The use demand of the even higher frequency band network of following 5G, 6G is adapted to, it is applied widely, there is great promotional value.
Preferably it is 48.5mm≤A by the value range of major diameter in order to adapt to the use demand of 5G and 6G networks
The value range of≤50.5mm, minor axis diameter are 27.5mm≤B≤30.0mm, and ellipse sews the termination frequency f of flexible waveguidestop's
Value range is 5.3GHz≤fstop≤6.6GHz.Preferred A=49.35mm in the present embodiment,That is A=28.75mm,
fstop=5.3GHz.
It is axially arranged with that a row is equally distributed to sew hole group along oval metallic waveguide 1, it includes X that every group, which is sewed hole group,
It is arranged and sews hole 2 on the wave crest 4 of oval metallic waveguide；As X=1, the pitch between two neighboring wave crest 4 is set as
L1, the two neighboring center spacing sewed between the group of hole is set as P1, then P1=NL1, N=1,2 ... ..., n；As X ＞ 1, X leakage
Hole is let out to be respectively distributed on adjacent X wave crest 4, every group sew Kong Zuzhong first sew hole 2 and the last one sew hole 2
Between center spacing be set as L2, two adjacent groups sew the center spacing between the group of hole and are set as P2, then P2=N ＇ L2, ＇=2 ... ... N,
N, whereinM is integer, λfThe wavelength of corresponding electromagnetic wave under the frequency of use of flexible waveguide is sewed for ellipse.
The utility model in order to better understand below in conjunction with the accompanying drawings does furtherly the technical solution of the utility model
It is bright.
Embodiment one：
Hole 2 is sewed in the present embodiment and sews hole 201 using rectangular, and every group is sewed the rectangular quantity X for sewing hole 201 of Kong Zuzhong
It is set as X=1 or X ＞ 1.
As shown in Fig. 2, every group is sewed the rectangular quantity for sewing hole 201 of Kong Zuzhong and is set as four, i.e. X ＞ 1；Four rectangular leakages
It lets out hole 201 and is separately positioned on four successively on adjacent wave crest 4, every group is sewed the rectangular holes 201 and most of sewing Kong Zuzhong first
The rectangular center spacing sewed between hole 201 of the latter is set as L2, two adjacent groups sew the center spacing between the group of hole and are set as P2,
P2=2L2, i.e., two adjacent groups, which are sewed, is spaced four wave crests 4 between the group of hole.Wherein,M is integer, λfIt is sewed for ellipse
The wavelength of corresponding electromagnetic wave under the frequency of use of flexible waveguide.
As shown in figure 3, every group is sewed the rectangular quantity for sewing hole 201 of Kong Zuzhong and is set as one, i.e. X=1；Two neighboring wave
Pitch between peak 4 is set as L1, the two neighboring center spacing sewed between the group of hole is set as P1, P1=L1, i.e., on each wave crest 4
It is all provided with and sews hole there are one rectangular.
As shown in figure 4, the rectangular center line for sewing hole 201 is parallel with the embossing direction of oval metallic waveguide 1, i.e., rectangular leakage
It is parallel with 4 direction of wave crest to let out 201 1 groups of hole opposite side, the side parallel with 4 direction of wave crest is set as long side, long side length d, with wave crest
The vertical side in 4 directions is set as broadside, width edge length c, adjacent long side and broadside and is equipped with chamfering, the radius of chamfering in junction
It is set as R；Wherein, the calculation formula of long side is：
In formula (3), λ is wave in the wavelength of free space, λgFor waveguide wavelength；Wherein, waveguide wavelength λgCalculation formula
For：
In formula (4), λcFor cutoff wavelength.
Assessment ellipse sews the quality of flexible waveguide radiance, is generally examined by the probability of its coupling loss.Leakage
It lets out hole 2 and cuts off the oval conduction electric current sewed on flexible waveguide inner wall, electric field is generated on sewing hole 2, and soft wave is sewed to ellipse
It leads wall currents and generates disturbance, and sewed from ellipse to free space coupling part electromagnetic energy in flexible waveguide, and with sewing
The difference of 2 position of hole and shape and size is also different by the field strength for sewing hole 2 to external radiation.
It is illustrated below with sewing the coupling loss of hole 2 and car antenna：
It sews hole 2 and the coupling loss of car antenna is acquired by following equation：
In formula (4), LcIndicate coupling loss, unit is decibel, PtIndicate that ellipse sews the transimission power electricity in flexible waveguide
Flat, unit is dBm, PrIndicate the received power level of car antenna, unit is dBm.
The locally coupled loss probability value of generally use 50% and 95% sews flexible waveguide radiance to weigh ellipse
Quality, i.e., the 50% locally coupled loss measured is less than the value less than the locally coupled loss that the value and 95% measure, same
In the case of probability value, coupling loss is smaller, and the received field strength of car antenna is stronger, and the radiance that ellipse sews flexible waveguide is got over
It is good.
The quality of transmission performance generally judges that ellipse sews the transmission loss of flexible waveguide by following according to its transmission loss
Formula acquires：
aLWG=aWG+ar (6)
In formula (6), aLWGIndicate that ellipse sews the transmission loss of flexible waveguide, aWGIndicate the transmission loss of elliptical waveguide, ar
Indicate that ellipse sews the radiation loss of flexible waveguide, the size of radiation loss is related with the notch shape and size of sewing hole 2, generally
The value range of radiation loss is 0.05aWG≤ar≤0.2aWG；Wherein, the transmission loss a of elliptical waveguideWGCalculation formula such as
Under：
In formula (7), p indicates the resistivity of waveguide material, p0The resistivity for indicating copper material, in the present embodiment, p0Value is
1.7241x10-8Ω ﹒ m, t are elliptic flexible waveguide copper strips thickness, and a is waveguide inner section width, and a=A-t, b are that waveguide inner section is high
Degree, b=B-t, fcFor dominant waveguide transmission mode TE10Or H10Cutoff frequency, f is the corresponding frequency of transmission loss that is calculated, together
Under one frequency, transmission loss is smaller, and transmission performance is better.
The utility model is mainly used in wireless communication and signal transmission covering system, each hop ellipse sew soft wave
In leading, radiofrequency signal is sewed from ellipse by signal source equipments such as base station or repeaters and is equipped with Waveguide coaxial turn in flexible waveguide
One end of parallel operation is injected, and a portion signal sews flexible waveguide internal transmission to the other end along ellipse, is installed in oval leakage
The waveguide match load for letting out flexible waveguide end all absorbs, and another part signal is sewed by ellipse and sews hole 2 in flexible waveguide
It lets out, is received by car antenna.
Compared to leakage coaxial cable, waveguide has that working frequency is high, transmission loss is small and coupling loss function admirable
Advantage, the utility model use have the rectangular oval metallic waveguide 1 for sewing hole 201, length range be set as 3mm≤d≤
The length range of 15mm, broadside are 2mm≤c≤10mm, and, the value range of chamfer radius meets R≤5mm, and frequency is not used only
Rate is up to 10GHz, meets the trend of future mobile communications high frequency development, can be suitable for 5G and the above mobile communications network
It uses, and exists relative to 1-5/8 " leaky cable transmission loss in 2.4GHz is as high as 6dB/100m and 1/2 " leaky cable
Transmission loss is up to 35dB/100m under 5.9GHz frequencies, and the utility model transmission loss under 5.9GHz frequencies is only 5dB/
100m, transmission performance it is with the obvious advantage, for transmission loss well below traditional leakage coaxial cable, development prospect is good, more preferably
The requirement for meeting external equipment decay indices and coupling index is realized on ground, and then ensure that the transmission performance and coupling of the utility model
Close performance.
The oval metal waveguide waveguide of the utility model is using high-purity copper band by argon arc welding welding embossing is molded
At the embossing structure of, use largely enhance the utility model bending property so that it can the disk of lopping in cable
On disk tool, compared to traditional rectangle leaky wave conduit, break rectangle leaky wave conduit cannot the big limitation that section transport and use,
And reduce the tie point in unit distance.Every 500 meters of flexible waveguide is sewed by ellipse to be calculated for one section, in every kilometer
Ellipse sews flexible waveguide, and only there are one tie points, it is only necessary to connect once, and use rectangle leaky waveguide, according to 12 meters every section
It is calculated, then at least needs to connect 84 times, therefore, the work of construction can be reduced to a great extent in the utility model
Amount improves working efficiency, moreover, if connection is improper at splicing point, it may appear that system voltage standing-wave ratio is higher, causes entirely logical
Believe system alarm paralysis, therefore, the probability that splicing point more at most breaks down a little is bigger, the safety generated to entire communication system
Hidden danger is also bigger, and the utility model high degree reduces the quantity of tie point, has also ensured entire communication system indirectly
Safe and stable operation.
Meanwhile the heavy construction task compared to traditional rectangle leaky wave conduit when being laid with, at the oval metal of disk
1 convenient in carrying of waveguide is laid with simply, greatly mitigates the workload of worker, and can further increase laying efficiency,
And the architectural characteristic that bending ability is strong, so that the utility model both can be fixed on wall by suspender as leakage coaxial cable
Wall can be also laid in orbit as rectangle leaky wave conduit, and laying environment is adaptable, and use scope is wide, before development
Jing great.
In addition, rectangle leaky wave conduit is waterproof and dampproof using being carried out by the way of sewing above hole 2 Continuous pressing device for stereo-pattern capping plate
Processing, the case where will appear aging alice with the increase adhesive tape of usage time, do not have waterproof moisture-proof effect, moisture once into
Enter in waveguide cavity body, entire communication system can be caused to paralyse, and is then in 1 peripheral hardware of oval metallic waveguide in the utility model
There is one layer of oversheath being fully sealed 3, moisture can be effectively prevent to enter ellipse and sewed inside flexible waveguide, waterproof and dampproof performance is excellent
It is different, and anti-aging property is good, and service life is long, the long-term stable operation of the utility model has been effectively ensured, and then indirectly
The stable operation of entire communication system is ensured.
Embodiment two：
As shown in Figure 5 and Figure 6, the present embodiment uses circle to sew hole with embodiment one the difference is that sewing hole 2
202, it sews Kong Zuzhong circles and sews the quantity X in hole 202 for every group and be set as X=1 or X ＞ 1, circle sews the radius R in hole 2021's
Value range is 2mm≤R1≤5mm。
As shown in figure 5, every group is sewed Kong Zuzhong circles and sews the quantity in hole 202 and be set as four, i.e. X ＞ 1；Four round leakages
It lets out hole 202 to be separately positioned on four continuous wave crests 4, sews first circle of Kong Zuzhong for every group and sew hole 202 and last
A circle sews the center spacing between hole 202 and is set as L2, two adjacent groups sew the center spacing between the group of hole and are set as P2, P2=
2L2.Wherein,M is integer, λfThe wavelength of corresponding electromagnetic wave under the frequency of use of flexible waveguide is sewed for ellipse.
As shown in fig. 6, every group is sewed Kong Zuzhong circles and sews the quantity in hole 202 and be set as one, i.e. X=1；Two neighboring wave
Pitch between peak 4 is set as L1, the two neighboring center spacing sewed between the group of hole is set as P1, P1=L1, i.e., on each wave crest 4
It is all provided with and sews hole 202 there are one circle.
Since the transmission loss of waveguide and the size of coupling loss are all related with the notch shape and size for sewing hole 2, this
The structure and radius R in hole 202 are sewed in utility model by circle1Value range design, keep the utility model preferably real
Now meet external equipment decay indices and couple the requirement of index, and then ensure that the transmission performance and coupling of the utility model
Energy.
Embodiment three：
As shown in Figure 7 and Figure 8, the present embodiment is sewed the difference is that sewing hole 2 using ellipse with embodiment one
Hole 203, sews Kong Zuzhong ellipses and sews the quantity X in hole 203 for every group and be set as X=1 or X ＞ 1, and ellipse sews the length in hole 203
Shaft diameter is set as d1, 3mm≤d1≤ 15mm, the minor axis diameter that ellipse sews hole 203 are set as d2, 2mm≤d2≤8mm。
As shown in fig. 7, every group is sewed Kong Zuzhong ellipses and sews the quantity in hole 203 and be set as four, i.e. X ＞ 1；Four ellipses
Shape is sewed hole 203 and is separately positioned on four continuous wave crests 4, sews first ellipse of Kong Zuzhong for every group and sews 203 He of hole
The last one ellipse sews the center spacing between hole 203 and is set as L2, two adjacent groups sew the center spacing between the group of hole and set
For P2, P2=2L2.Wherein,M is integer, λfCorresponding electromagnetic wave under the frequency of use of flexible waveguide is sewed for ellipse
Wavelength.
As shown in figure 8, every group is sewed Kong Zuzhong ellipses and sews the quantity in hole 203 and be set as one, i.e. X=1；It is two neighboring
Pitch between wave crest 4 is set as L1, the two neighboring center spacing sewed between the group of hole is set as P1, P1=L1, i.e. each wave crest 4
On be all provided with and sew hole 203 there are one ellipse.
Since the transmission loss of waveguide and the size of coupling loss are all related with the notch shape and size for sewing hole 2, this
The structure in hole 203 is sewed by ellipse in utility model and ellipse sews the long axis in hole 203 and the size design of short axle, is made
The requirement for meeting external equipment decay indices and coupling index is better achieved in the utility model, and then ensure that the utility model
Transmission performance and coupling performance.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that,
It can still modify to the technical solution recorded in previous embodiment, either to which part or all technical features
Progress equivalent replacement, and these modifications or replacements, the utility model embodiment that it does not separate the essence of the corresponding technical solution
The range of technical solution.
Claims (10)
1. a kind of ellipse sews flexible waveguide, it is characterised in that：Including oval metallic waveguide and it is set in oval metallic waveguide
Outer oversheath；The bellows that the ellipse metallic waveguide is formed using embossing moulding process, and oval metallic waveguide
Cross section is in ellipticity, and the major diameter of oval metallic waveguide cross section is set as A, the short axle of oval metallic waveguide cross section
Diameter is set as B, and the value of A and B meets following formula (1) and formula (2) simultaneously：
A>B and A ≈ 2kB (1)
Wherein, in formula (1) and (2), k is that ellipse sews flexible waveguide diameter correction factor, and the value range of k is 0.8~1, k1For
Ellipse sews flexible waveguide embossing correction factor, k1Value range be 0.8~1, ctFor free space electromagnetic wave propagation speed,
fstopThe termination frequency of flexible waveguide is sewed for ellipse；
It is axially arranged with that a row is equally distributed to sew hole group along oval metallic waveguide, sews hole group and include X for every group and be arranged
Hole is sewed on the wave crest of oval metallic waveguide；As X=1, the pitch between two neighboring wave crest is set as L1, adjacent two
A center spacing sewed between the group of hole is set as P1, then P1=NL1, N=1,2 ... ..., n.
2. ellipse according to claim 1 sews flexible waveguide, it is characterised in that：When the X ＞ 1, X are sewed hole and divided respectively
Cloth on X adjacent wave crest, every group sew Kong Zuzhong first sew hole and the last one sew hole between center spacing set
For L2, two adjacent groups sew the center spacing between the group of hole and are set as P2, then P2=N ＇ L2, ＇=2 ... ... N, n, whereinM is integer, λfThe wavelength of corresponding electromagnetic wave under the frequency of use of flexible waveguide is sewed for ellipse.
3. ellipse according to claim 1 or 2 sews flexible waveguide, it is characterised in that：The value range of the major diameter
Value range for 25.5mm≤A≤108.5mm, minor axis diameter is 12.5mm≤B≤65.5mm, and ellipse sews the end of flexible waveguide
Only frequency fstopValue range is 2.5GHz≤fstop≤11.7GHz。
4. ellipse according to claim 3 sews flexible waveguide, it is characterised in that：The value range of the major diameter is
The value range of 48.5mm≤A≤50.5mm, minor axis diameter are 27.5mm≤B≤30.0mm, and ellipse sews the termination of flexible waveguide
Frequency fstopValue range be 5.3GHz≤fstop≤6.6GHz。
5. ellipse according to claim 1 or 2 or 4 sews flexible waveguide, it is characterised in that：The hole of sewing is rectangular leakage
Hole is let out, the rectangular hole side parallel with the oval embossing direction of metallic waveguide of sewing is set as long side, and long side length is set as length d,
The rectangular hole side vertical with the oval embossing direction of metallic waveguide of sewing is set as broadside, and width edge length is set as width c, rectangular leakage
The junction for letting out the adjacent both sides in hole is equipped with chamfering, and chamfer radius is set as R；The calculation formula of the length d is：
In formula (3), λ is wave in the wavelength of free space, λgFor waveguide wavelength；Wherein, waveguide wavelength λgCalculation formula be：
In formula (4), λcFor cutoff wavelength.
6. ellipse according to claim 5 sews flexible waveguide, it is characterised in that：The rectangular length d's for sewing hole takes
It is worth ranging from 3mm≤d≤15mm.
7. ellipse according to claim 5 sews flexible waveguide, it is characterised in that：The rectangular width c's for sewing hole takes
It is worth ranging from 2mm≤c≤10mm.
8. ellipse according to claim 5 sews flexible waveguide, it is characterised in that：The rectangular chamfer radius R for sewing hole
Value range be R≤5mm.
9. ellipse according to claim 1 or 2 or 4 sews flexible waveguide, it is characterised in that：It is sewed for circle in the hole of sewing
Hole, the radius that circle sews hole are set as R1, 2mm≤R1≤5mm。
10. ellipse according to claim 1 or 2 or 4 sews flexible waveguide, it is characterised in that：The hole of sewing is ellipse
Hole is sewed, ellipse sews hole major diameter and is set as d1, 3mm≤d1≤ 15mm, the minor axis diameter that ellipse sews hole are set as d2,
2mm≤d2≤8mm。
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