CN205621830U - Multimode metal cylinder chamber wave filter in single chamber - Google Patents
Multimode metal cylinder chamber wave filter in single chamber Download PDFInfo
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- CN205621830U CN205621830U CN201620254605.8U CN201620254605U CN205621830U CN 205621830 U CN205621830 U CN 205621830U CN 201620254605 U CN201620254605 U CN 201620254605U CN 205621830 U CN205621830 U CN 205621830U
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- cylindrical cavity
- multimode
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- chamber
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Abstract
The utility model discloses a multimode metal cylinder chamber wave filter in single chamber, including cylindrical cavity, two end covers and at least one metal rod and two feed units, the both ends opening of cylindrical cavity to adopt the end cover to seal, the shape size and the corresponding open -ended shape size phase -match of end cover, two feed units are installed respectively on two end covers of cylindrical cavity, cylindrical cavity is placed in to the metal rod to with perpendicular the meeting of lateral wall of cylindrical cavity. The utility model discloses multimode idea has been used to the structure of carrying, and the mark bandwidth broad of wave filter at metal resonant cavity chamber wall, has added the metal rod and has carried out the perturbation, realizes a multimode, has transmission zero's wave filter, has small, simple structure, advantage such as workable, and the range of application is wide, satisfied modern communication system's that can be fine requirement.
Description
Technical field
This utility model relates to the technical field of wave filter, refers in particular to the metal cylinder chamber of a kind of single-chamber multimode
Wave filter.
Background technology
Microwave filter is transmitting terminal and the requisite device of receiving terminal in Modern Communication System, and it is to signal
Play centrifugation, allow useful signal is the most zero-decrement to be passed through, to useless the biggest the declining of signal
It passes through to subtract suppression.Along with the development of wireless communication technology, the frequency band between signal is more and more narrow, and this is just to filter
Specification and the reliability of ripple device are had higher requirement.Rectangular cavities wave filter have high frequency selectivity,
Filter with low insertion loss, power capacity are big, steady performance and there is the highest using value.Cavity body filter leads to
Cross between the resonator of each chamber perforate or add probe, it is achieved inductance or Capacitance Coupled, by change hole position,
The thickness length etc. of size or probe controls the power of coupling inductance or coupling electric capacity to realize various filtering
Device；And the cross-couplings being easily achieved between resonator, by controlling cross-linked quantity and power
It is achieved position and the number of transmission zero.Due to above feature, research cavity body filter multi-mode structure,
The miniaturization of cavity body filter obtains the extensive concern of scholars.
At present, the concrete condition of existing cavity body filter is as follows:
1) the separation degenerate mode of resonator typically has four kinds of methods: 1.1) as it is shown in figure 1, pass through coupling screws
When realizing degenerate mode coupling, in order to avoid interacting, its position should be positioned at two resonance (coupling)
Electric field intensity maximum near, and remaining degenerate mode electric field is the region of zero, usual coupling screws and two poles
The electric field changed becomes 45o, but this coupled modes tunable range is smaller；1.2) as shown in figures 2 a and 2b,
Above resonator 45° angle, put in coupling screws, equally separate degenerate mode；1.3) such as Fig. 3 a and 3b
Shown in, cut a rectangle corner cut, but this coupled modes are difficult to processing；It is 1.4) as shown in Figs. 4a and 4b,
Slotting at resonator central, same this coupled modes are difficult to processing.
2) nineteen fifty-one woods is that dry academician's resonant frequency based on wave-guide cavity wave internal schema fundamental formular proposes cylinder
Shape resonator cavity also exists multiple degenerate mode, and devises the chamber five being substantially reduced waveguide filter volume
Mode filter, the research for multimode cavity wave filter lays the foundation.
3) in October, 1998, G.Lastoria et al. is at IEEE MICROWAVE AND GUIDED WAVE
LETTERS delivers the literary composition of entitled " CAD of Triple-Mode Cavities in Rectangular Waveguide "
Zhang Zhong.Author proposes a kind of three mode structures using metallic cavity corner cut, and structure as shown in Figure 5 a, is passed through
Several modes of resonance are moved in the passband that we are required by the size controlling corner cut, and its simulation result is such as
Shown in Fig. 5 b；The structure of this coupled modes is difficult to processing.
4) in January, 2004, L.H.Chua et al. delivers entitled " Analysis of dielectric loaded cubical
Cavity for triplemode filter design " in article, propose to utilize coaxial line as feed, such as Fig. 6 a institute
Showing, using the dielectric cavity fluid filter structure of tuning screw, simulation result is as shown in Figure 6 b；This employing coupling
The tunable scope of structure closing screw is fewer, there is certain deficiency.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of prior art with not enough, it is provided that a kind of single-chamber, can
Produce multimode and the metallic cavity wave filter of transmission zero, it is possible to achieve bandpass filtering, have that volume is little, set
The advantages such as meter is simple, easily process, performance is good, it is possible to well meet the requirement of modern communication systems.
For achieving the above object, technical scheme provided by the utility model is: the metal of a kind of single-chamber multimode
Cylindrical cavity wave filter, includes circular cylindrical cavity, two end caps and at least one metal bar and two feeds are single
Unit, the both ends open of described circular cylindrical cavity, and use end cap to seal, the shape size of described end cap
Matching with the shape size of respective openings, two feed element are separately mounted to two ends of circular cylindrical cavity
Covering, described metal bar is placed in circular cylindrical cavity, and with the sidewall vertical connection of circular cylindrical cavity.
Described metal bar is uniform cylindrical body or uneven cylinder, and described uneven cylinder is by two sections of thicknesses
Different cylindrical sections is formed by connecting.
Described metal bar is fixed in the middle part of the sidewall of circular cylindrical cavity.
Described feed element is vertically mounted on the center of end cap.
Described feed element is made up of probe, sub-miniature A connector, disk, and described probe is vertically inserted on end cap,
Its one end put in circular cylindrical cavity is fixedly connected with disk, and its one end overhanging circular cylindrical cavity is installed
There is sub-miniature A connector.
Described circular cylindrical cavity, end cap, metal bar, feed element use screw to be fixed.
This utility model compared with prior art, has the advantage that and beneficial effect:
The carried structure of this utility model applies the idea of multimode, and the fractional bandwidth of wave filter is wider, at metal
Resonator cavity cavity wall, with the addition of metal bar and carries out perturbation, it is achieved multimode, wave filter with transmission zero,
There is the advantages such as volume is little, simple in construction, easy processing, applied range, it is possible to well meet the modern times logical
The requirement of news system.
Accompanying drawing explanation
Fig. 1 is the resonator (resonator is cuboid) using the first separation degenerate mode method of prior art
Structure chart.
Fig. 2 a is the resonator axonometric chart using prior art the second separation degenerate mode method.
Fig. 2 b is the resonator top view using prior art the second separation degenerate mode method.
Fig. 3 a is the resonator axonometric chart using the third separation degenerate mode method of prior art.
Fig. 3 b is the resonator top view using the third separation degenerate mode method of prior art.
Fig. 4 a is the resonator axonometric chart using prior art the 4th kind to separate degenerate mode method.
Fig. 4 b is the resonator top view using prior art the 4th kind to separate degenerate mode method.
Fig. 5 a is the three mode filter structure charts using metallic cavity corner cut in prior art.
Fig. 5 b is the three mode filter simulation result figures using metallic cavity corner cut in prior art.
Fig. 6 a is the dielectric cavity fluid filter structure chart using tuning screw in prior art.
Fig. 6 b is the dielectric cavity fluid filter simulation result figure using tuning screw in prior art.
Fig. 7 is the structural representation of this utility model wave filter.
Fig. 8 is the front view of this utility model wave filter.
Fig. 9 is the side view of this utility model wave filter.
Figure 10 is the Electromagnetic Simulation curve chart of this utility model filter freguency response.
Detailed description of the invention
Below in conjunction with specific embodiment, the utility model is described in further detail.
Embodiment 1
As shown in Figure 7 to 9, the metal cylinder cavity filter described in the present embodiment, include cylindrical cavity
1, two end caps of body, 4,5 and two feed element of 2,3 and two metal bars, described circular cylindrical cavity 1
Both ends open, and use end cap 2,3 to seal, the shape size of described end cap and the shape of respective openings
Size matches, and two feed element are separately mounted to the centre bit of two end caps 2,3 of circular cylindrical cavity 1
Putting, two metal bars 4,5 are symmetrically placed in circular cylindrical cavity 1, and are vertically mounted on circular cylindrical cavity 1
Sidewall in the middle part of.In the present embodiment, described metal bar 4,5 is uneven cylinder, and described uneven
Cylinder is to be formed by connecting by the cylindrical section that two sections of thicknesses are different.Additionally, described feed element is by probe 6, SMA
Joint 7, disk 8 form, and described probe 6 is vertically inserted on end cap, and it puts in circular cylindrical cavity 1
One end is fixedly connected with disk 8, and its one end overhanging circular cylindrical cavity 1 is provided with sub-miniature A connector 7.Institute
Stating 4,5, two feed element of circular cylindrical cavity 2,3, two metal bars of 1, two end caps uses screw solid
Determine to get up, be assembled into an entirety, become metal cylinder cavity filter of the present utility model, this metal cylinder chamber
The response characteristic of wave filter is as shown in Figure 10.
Embodiment 2
Metal bar described in the present embodiment is uniform cylindrical body (being not drawn in figure) as different from Example 1.
The examples of implementation of the above are only the preferred embodiment of this utility model, not limit this practicality with this
Novel practical range, therefore the change that all shapes according to this utility model, principle are made, all should contain at this
In the protection domain of utility model.
Claims (6)
1. the metal cylinder cavity filter of a single-chamber multimode, it is characterised in that: include circular cylindrical cavity,
Two end caps and at least one metal bar and two feed element, the both ends open of described circular cylindrical cavity, and
Using end cap to seal, the shape size of described end cap matches with the shape size of respective openings, two
Feed element is separately mounted on two end caps of circular cylindrical cavity, and described metal bar is placed in circular cylindrical cavity,
And with the sidewall vertical connection of circular cylindrical cavity.
The metal cylinder cavity filter of a kind of single-chamber multimode the most according to claim 1, it is characterised in that:
Described metal bar is uniform cylindrical body or uneven cylinder, and described uneven cylinder is by two sections of thickness differences
Cylindrical section be formed by connecting.
The metal cylinder cavity filter of a kind of single-chamber multimode the most according to claim 1 and 2, its feature
It is: described metal bar is fixed in the middle part of the sidewall of circular cylindrical cavity.
The metal cylinder cavity filter of a kind of single-chamber multimode the most according to claim 1, it is characterised in that:
Described feed element is vertically mounted on the center of end cap.
5. according to the metal cylinder cavity filter of a kind of single-chamber multimode described in claim 1 or 4, its feature
Being: described feed element is made up of probe, sub-miniature A connector, disk, described probe is vertically inserted in end cap
On, its one end put in circular cylindrical cavity is fixedly connected with disk, and it overhangs one end of circular cylindrical cavity
Sub-miniature A connector is installed.
The metal cylinder cavity filter of a kind of single-chamber multimode the most according to claim 1, it is characterised in that:
Described circular cylindrical cavity, end cap, metal bar, feed element use screw to be fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620254605.8U CN205621830U (en) | 2016-03-30 | 2016-03-30 | Multimode metal cylinder chamber wave filter in single chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620254605.8U CN205621830U (en) | 2016-03-30 | 2016-03-30 | Multimode metal cylinder chamber wave filter in single chamber |
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| Publication Number | Publication Date |
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| CN205621830U true CN205621830U (en) | 2016-10-05 |
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| CN201620254605.8U Expired - Fee Related CN205621830U (en) | 2016-03-30 | 2016-03-30 | Multimode metal cylinder chamber wave filter in single chamber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789792A (en) * | 2016-03-30 | 2016-07-20 | 华南理工大学 | One-chamber multi-mode metal cylinder chamber filter |
| CN106785253A (en) * | 2016-12-02 | 2017-05-31 | 华南理工大学 | A kind of new three moulds medium bandpass filter |
| CN106910970A (en) * | 2017-03-03 | 2017-06-30 | 华南理工大学 | A kind of mode filter of cavity four |
-
2016
- 2016-03-30 CN CN201620254605.8U patent/CN205621830U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789792A (en) * | 2016-03-30 | 2016-07-20 | 华南理工大学 | One-chamber multi-mode metal cylinder chamber filter |
| CN106785253A (en) * | 2016-12-02 | 2017-05-31 | 华南理工大学 | A kind of new three moulds medium bandpass filter |
| CN106785253B (en) * | 2016-12-02 | 2020-02-18 | 华南理工大学 | Novel three-mode dielectric band-pass filter |
| CN106910970A (en) * | 2017-03-03 | 2017-06-30 | 华南理工大学 | A kind of mode filter of cavity four |
| CN106910970B (en) * | 2017-03-03 | 2020-08-18 | 华南理工大学 | Cavity four-mode filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 Termination date: 20190330 |