CN206180070U

CN206180070U - Swivelling chute folded waveguide

Info

Publication number: CN206180070U
Application number: CN201620965812.4U
Authority: CN
Inventors: 王清源
Original assignee: Chengdu Saina Technology Co Ltd
Current assignee: Chengdu Saina Technology Co Ltd
Priority date: 2016-08-29
Filing date: 2016-08-29
Publication date: 2017-05-17
Anticipated expiration: 2026-08-29

Abstract

The utility model discloses a swivelling chute folded waveguide, include 2 the at least shortwave cycles of leading and the input/output waveguide that communicate in proper order along Z axle direction. The waveguide is rectangular waveguide, single -ridge rectangular waveguide or two spine rectangular waveguide. Swivelling chute folded waveguide constitutes along a helix is crooked around the Z axle through the waveguide section bar of certain cross section. When using in travelling wave tube isoline electromagnetic wave vacuum device, compare with traditional folded waveguide, the utility model overcomes that the electron beam exists during through traditional slow wave structure because 180 degrees that the U -shaped waveguide bend brought differ, can be favorable to the wide electromagnetic wave source's of exhibition work bandwidth more. And simultaneously, the utility model discloses the figure that can make sharp electron beam channel is increased to 2 roots at the most, can show to improve to restraint ripples efficiency for the interaction. This swivelling chute folded waveguide also can be used for realizing the compact delay line of various waveguides, single ridge waveguide or double ridged waveguide.

Description

A kind of swivelling chute folded waveguide

Technical field

This utility model is related to a kind of electromagnetic transmission line.Specifically, it is to be related to one kind for signal delay or electromagnetism The compact swivelling chute folded waveguide of the slow-wave structure of wave source.

Background technology

First important application of folded transmission lines is, as signal delay line, to prolong for signal in the systems such as radar Late.Second important application of folded transmission lines is used as slow-wave structure in travelling-wave tube amplifier.At this moment, electron beam edge Certain straight line electron passage is propagated, and electromagnetic wave is then propagated along the transmission line of bending.Although propagating in folded transmission lines The phase velocity of electromagnetic wave quickly, can be close to the light velocity, the even greater than light velocity, but in the straight line electron passage, electron beam is experienced The phase velocity of the electromagnetic wave for arriving can be well below the light velocity.The beam energy of the travelling-wave tube constituted using folded transmission lines can be big It is big to reduce, be conducive to the miniaturization of device.

Traditional folded transmission lines are typically formed using transmission line continuous bend.Such as waveguide delay line and folded waveguide row Folded waveguide in wave duct stacks waveguide bend.It is this to prolong because too small bending curvature radius will cause the reflection of signal Late the volume of line is generally all than larger.Common slow-wave structure in folded waveguide travelling-wave tube amplifier using rectangular waveguide section with U-shaped waveguide end alternately connects and composes respectively, equally there is bulky problem.Common folded waveguide travelling-wave tube exist another Problem is bandwidth problem.The folded waveguide adopted in this travelling-wave tube is generally two-dimensional structure, and the flat of Z axis is crossed in waveguide at one Continuous bend in face, such as XZ planes.In this folded waveguide, the electronics along Z axis propagation is by the folding of a cycle During waveguide, there is the region of two and electromagnetic wave phase interaction.In the two interaction regions, what the electron beam of transmission was experienced The phase contrast of electromagnetic wave also includes due to passing in addition to electromagnetic wave transmits determined phase contrast along the bending approach of the folded waveguide So-called " Shape-phase is poor " of the 180 degree that electromagnetism field direction is reversely determined caused by the 180 degree bending ripple of defeated line.This shape The presence of phase contrast so that along the Z-direction electron beam propagated and the electromagnetic wave propagated along folded waveguide in the speed along Z-direction Under synchronous condition, in two interaction regions in same period, the active force along Z-direction suffered by electron beam can be cut Direction is changed, causes electromagnetic wave to be cancelled out each other from the energy that electron beam is obtained.In order to solve this problem, electron beam is along Z-direction Speed must mismatch along the average phase velocity of Z-direction with electromagnetic wave.Thus the relative bandwidth to folded waveguide travelling-wave tube is brought It is serious to limit.Another problem that common folded waveguide travelling-wave tube is present is the beam ripple interaction caused due to single electron book Efficiency.There is the scheme for taking 2 to 3 electron beams both at home and abroad, but compared with the main beam on structure centre axle, its The phase place of the electromagnetic wave that its electron beam is experienced has a certain degree of mismatch, causes the decline of device overall performance.

Utility model content

The purpose of this utility model is to provide a kind of swivelling chute folded waveguide without Shape-phase difference.This scheme has The features such as simple structure, easy to process, operating frequency width, compact conformation.

To achieve these goals, our scheme is, swivelling chute folded waveguide, including one around Z-direction helical buckling Waveguide and the input and output waveguide installed in waveguide end；A cycle is formed after 360 degree of waveguide helical buckling；At least exist 2 cycles；Often bend the one most shortwave of formation in one week and lead the cycle；X-axis, Y-axis and Z axis form right angle coordinate system and meet the right hand determine Then；O points are coordinate origin；A helix waveguide structure is formed after waveguide helical buckling；Because most shortwave leads any of cycle Integral multiple can serve as a cycle of the swivelling chute folded waveguide, be made that definition to the most shortwave cycle of leading here.

There is a straight line AB parallel with Z axis, the straight line AB leads the common factor in cycle and is with described any one most shortwave One continuous line segment CD.So, arbitrarily parallel with Z axis straight line only has one continuously with any one most shortwave cycle of leading Cross line segment.This be this utility model with traditional folded waveguide travelling-wave tube in swivelling chute folded waveguide significant difference it One.In traditional folded waveguide travelling-wave tube, arbitrarily parallel with Z axis straight line has two companies with any one most shortwave cycle of leading The continuous line segment that crosses.

When the swivelling chute folded waveguide is used as slow-wave structure, need to arrange at least one straight line electron passage.This is straight Line electron beam channel is parallel with Z axis.The straight line electron beam passage overlaps with the straight line AB.As optimal design, the line Section CD leads the maximum amplitude point of the electric field intensity of electromagnetic wave in the cycle by the most shortwave.That is, straight line electron passage By the position that electric field intensity in the swivelling chute folded waveguide is maximum.

Without loss of generality, we define the both ends of the surface that the arbitrarily most shortwave leads the cycle position it is as follows：Any most shortwave The both ends of the surface for leading the cycle are all parallel with YZ planes.What the most shortwave led the both ends of the surface in cycle is shaped as rectangle；It is described it is arbitrary most The broadside that shortwave leads the both ends of the surface in cycle is all parallel with Y direction.

Or, it is single ridge rectangular waveguide that the most shortwave leads the both ends of the surface in cycle；Arbitrary most shortwave leads the two of the cycle The broadside of any end face in end face is parallel with Y direction, and the ridge of single ridge rectangular waveguide is located at a broadside of the waveguide On.

Or, it is double ridge rectangular waveguides that most shortwave leads the both ends of the surface in cycle；Arbitrary most shortwave leads the both ends of the surface in cycle In any end face broadside it is parallel with Y direction, double ridges of described pair of ridge rectangular waveguide are wide positioned at two of the waveguide respectively Bian Shang.

Used as one of implementation, the swivelling chute folded waveguide surrounds Z simultaneously by a shape being positioned in YZ planes Axle rotates and uniformly movement is constituted along Z-direction；Described one shape being positioned in YZ planes does not have intersection point with Z axis.

For the ease of processing, at least 2 most shortwaves of the swivelling chute folded waveguide lead periodic arrangement in a cylinder On conductor；The plurality of most shortwave is led the outer surface in cycle and is overlapped with the outer surface of the Circular inner conductor.At this moment, the swivelling chute folding Folded waveguide can be machined in the outer surface of a metal cylinder using centre numerically controlled lathe.Here so-called outer surface is The centrage that determined relative to the axis of the swivelling chute folded waveguide and define.

For the ease of carrying out vacuum sealing to the swivelling chute folded waveguide, the swivelling chute folded waveguide is also included at least Two outer conductors；The inner surface of the outer conductor all overlaps with the outer surface of the Circular inner conductor；All outer conductors will The inner wire appearance face seal.

When electromagnetic wave frequency be close to the mode of operation of the folded waveguide cut-off frequency when, the straight line AB with it is described Any two goes to zero along the phase contrast that the adjacent most shortwave of Z-direction leads the electromagnetic wave at the common factor in cycle.

The utility model proposes using the various of rectangular waveguide, single ridged waveguides, double ridged waveguide or other shapes of waveguide Periodic Rotating groove folded waveguide.On the basis of existing traditional folded waveguide slow wave line, shape phase is solved well Broadband stationary problem between electron beam that potential difference is brought and electromagnetic wave.The utility model is also used as compact signal and prolongs Slow line.Using the swivelling chute folded waveguide as travelling-wave tube interaction waveguide, it is expected to substantially reduce high-frequency microwave, millimeter wave, Beam energy even needed for THz devices, increases its power simultaneously its bandwidth of operation of broadening.

Description of the drawings

Fig. 1 is the schematic diagram of this utility model embodiment 1；

Fig. 2 is the end view along Z-direction of this utility model embodiment 1；

Fig. 3 is the schematic diagram of this utility model embodiment 2；

Fig. 4 is the schematic diagram of this utility model embodiment 3；

Fig. 5 is the Circular inner conductor schematic diagram of this utility model embodiment 3；

Fig. 6 is the outer conductor schematic diagram of this utility model embodiment 3；

Fig. 7 is end view of this utility model embodiment 3 along Z-direction；

Fig. 8 is a minimum period schematic diagram of this utility model embodiment 3；

Fig. 9 is the schematic diagram of this utility model embodiment 3（Including many straight line electron beam passages）；

Figure 10 is the schematic diagram of this utility model embodiment 3（Including leading in many straight line electron beam passages and cylinder Body）；

Label correspondence title in accompanying drawing：1- input and output waveguides, 2- most shortwaves are led the cycle, 7- straight line electron beam passages, 9- Circular inner conductor, 9a- outer conductors.

Specific embodiment

Embodiment 1

As illustrated in fig. 1 and 2.

Swivelling chute folded waveguide, leads the cycle 2 and input is defeated including 3 most shortwaves being sequentially communicated along Z-direction and repeat Go out waveguide 1.

The straight line AB parallel with Z axis, the common factor for leading the cycle with described any one most shortwave is a continuous line segment CD.

It is provided with 4 straight line electron passages 7.The straight line electron beam passage 7 is parallel with Z axis.The straight line electron beam passage 7 Overlap with the straight line AB.The line segment CD leads the maximum amplitude of the electric field intensity of electromagnetic wave in the cycle by the most shortwave Point.That is, straight line electron passage 7 is by the maximum position of electric field intensity in the swivelling chute folded waveguide.

It is single ridge rectangular waveguide that the most shortwave leads the both ends of the surface in cycle；Arbitrary most shortwave is led in the both ends of the surface in cycle Any end face broadside it is parallel with Y direction, the ridge of single ridge rectangular waveguide is located on a broadside of the waveguide.

The swivelling chute folded waveguide is by " recessed " the shape shape in YZ planes simultaneously around Z axis rotation and along Z axis side To uniform mobile composition；Described one shape being positioned in YZ planes does not have intersection point with Z axis.

Embodiment 2

As shown in Figure 3.

Compared with embodiment 1, the difference is that only:It is double ridge rectangular waveguides that most shortwave leads the both ends of the surface in cycle；Institute State arbitrary most shortwave lead any end face in the both ends of the surface in cycle broadside it is parallel with Y direction, the described pair of ridge rectangular waveguide Double ridges are respectively on two broadsides of the waveguide.

Embodiment 3

As shown in figs. 4 through 10.Compared with embodiment 1, the difference is that only:

The both ends of the surface that most shortwave leads the cycle are all parallel with YZ planes.What the most shortwave led the both ends of the surface in cycle is shaped as square Shape；The broadside of the both ends of the surface that arbitrary most shortwave leads the cycle is all parallel with Y direction.

6 most shortwaves of the swivelling chute folded waveguide lead periodic arrangement on a Circular inner conductor 9；It is the plurality of most short The outer surface in waveguide cycle overlaps with the outer surface of the Circular inner conductor 9.

The swivelling chute folded waveguide also includes two outer conductor 9a；The inner surface of the outer conductor 9a all with the cylinder The outer surface of inner wire 9 overlaps；All outer conductor 9a are by the inner wire appearance face seal.

8 straight-line electric beamlets are provided with altogether.

More than we illustrate several embodiments of swivelling chute folded waveguide.In these examples, in order to draw signal The convenience of figure, the periodicity of swivelling chute folded waveguide is 3-6.In fact, in electromagnetic wave source, particularly in travelling-wave tube, rotation The periodicity of turn trough folded waveguide can up to tens.Meanwhile, in the embodiment more than, in order to process these swivelling chutes Folded waveguide, needs to take the processing methods such as wire cutting, numerical-control turn-milling, many interior angles to need chamfered.These chamferings can be right The performance of swivelling chute folded waveguide produces impact, must take in Modeling Calculation.

Claims

1. a kind of swivelling chute folded waveguide, it is characterised in that including around the waveguide of Z-direction helical buckling and installed in waveguide The input and output waveguide of end；A cycle is formed after 360 degree of waveguide helical buckling；At least there are 2 cycles；Often bend one week Form a most shortwave and lead the cycle；X-axis, Y-axis and Z axis form right angle coordinate system simultaneously meet the right-hand rule；O points are that coordinate system is former Point；A helix waveguide structure is formed after waveguide helical buckling；At least 2 most shortwaves of the swivelling chute folded waveguide lead the cycle It is arranged in a Circular inner conductor（9）On；The most shortwave leads the outer surface and the Circular inner conductor in cycle（9）Outer surface weight Close.

2. a kind of swivelling chute folded waveguide according to claim 1, it is characterised in that there is a straight line parallel with Z axis The common factor that AB, the straight line AB lead the cycle with described any one most shortwave is a continuous line segment CD.

3. a kind of swivelling chute folded waveguide according to claim 2, it is characterised in that have at least parallel to Z axis Straight line electron beam passage（7）, straight line electron beam passage（7）Run through into helix waveguide structure from helix waveguide structure；It is described straight Line electron beam channel（7）Overlap with the straight line AB；The line segment CD, straight line electron beam passage（7）Led by the most shortwave The maximum amplitude point of the electric field intensity of electromagnetic wave in cycle.

4. a kind of swivelling chute folded waveguide according to claim 1, it is characterised in that the arbitrarily most shortwave leads the cycle Both ends of the surface are all parallel with YZ planes；What the most shortwave led the cross section in cycle is shaped as rectangle；Arbitrary most shortwave leads week The broadside of the both ends of the surface of phase is all parallel with Y direction.

5. a kind of swivelling chute folded waveguide according to claim 1, it is characterised in that the most shortwave leads the two ends in cycle Face is all parallel with YZ planes；It is single ridge rectangular waveguide that the most shortwave leads the both ends of the surface in cycle；Arbitrary most shortwave leads week The broadside of any end face in the both ends of the surface of phase is parallel with Y direction, and the ridge of single ridge rectangular waveguide is located at the one of the waveguide On individual broadside.

6. a kind of swivelling chute folded waveguide according to claim 1, it is characterised in that the most shortwave leads the two ends in cycle Face is all parallel with YZ planes；It is double ridge rectangular waveguides that the most shortwave leads the both ends of the surface in cycle；Arbitrary most shortwave leads the cycle Both ends of the surface in any end face broadside it is parallel with Y direction, double ridges of described pair of ridge rectangular waveguide are located at respectively the waveguide Two broadsides on.

7. a kind of swivelling chute folded waveguide according to claim 1, it is characterised in that the swivelling chute folded waveguide is also wrapped Include at least two outer conductors（9a）, two outer conductors（9a）It is symmetrical arranged into columnar structured；The outer conductor（9a）Interior table Face all with the Circular inner conductor（9）Outer surface overlap；All outer conductors（9a）By the inner wire appearance face seal.

8. a kind of swivelling chute folded waveguide according to claim 2, when the frequency of electromagnetic wave is be close to the folded waveguide During the cut-off frequency of mode of operation, the straight line AB leads the common factor in cycle with any two along the adjacent most shortwave of Z-direction The phase contrast of the electromagnetic wave at place levels off to zero.