A kind of adjustable cavity body filter of wall thickness
Technical field
The present invention relates to a kind of filter more particularly to a kind of adjustable cavity body filters of wall thickness, belong to wireless communication
Application field.
Background technique
Filtering material relevant to electromagnetism in wireless communication field, needs certain mechanical strength on the one hand and protects it
In the objects such as antenna, guarantee that the electromagnetism wave energy high efficiency of working frequency range penetrates again on the other hand, to make the filtering material
Material can play the role of protecting equipment, while not influence the characteristic of electromagnetic transmission again.In order to can guarantee the efficient of electromagnetic wave
It penetrates, existing technical solution generally uses half-wavelength theory to carry out material thickness design.Single General Physics material is usual
It is theoretical using half-wavelength or quarter-wave, corresponding to different frequencies, change thickness, reaches and adjust it to the saturating of electromagnetic wave
The effect of wave response.More specifically, in general, electromagnetic wave is worn when material thickness is the 1/2 of working frequency range electromagnetic wavelength
Saturating rate is optimal value.However from the above, it can be seen that ensure certain wave transparent performance, the thickness of above-mentioned filtering material
It is typically subject to the limitation of wave transparent performance requirement, it is relatively low or higher that this will lead to material thickness, and finished-product material thickness is fixed, needle
It is strong to property but functionally more single.
Summary of the invention
The present invention is exactly in view of the deficienciess of the prior art, provide a kind of adjustable cavity body filter of wall thickness.
To solve the above problems, the technical solution used in the present invention is as follows:
A kind of adjustable cavity body filter of wall thickness, including ontology and device for adjusting wall thickness, the ontology include shell, adjust
Humorous screw rod, harmonic oscillator and conductive layer, adjusting screw rod are inserted into shell side outer wall, and harmonic oscillator is mounted in housing cavity, and is located at
Tuning screw respective side, tuning screw can be inserted into harmonic oscillator inner cavity, and conductive layer is mounted in harmonic oscillator inner cavity;
The shell quadrangle of the ontology is mounted with device for adjusting wall thickness, and direction is parallel with adjusting screw rod, the wall
Thick regulating device includes plate seat, slot and plate, and plate seat generally upright post type, the adjacent two sidewalls contacted with shell are set
There is slot, slot penetrates through entire plate seat, and the slot horizontal alignment on adjacent plate seat, plate are mounted in slot.
Further, the plate is sheet metal, with a thickness of 1 ~ 3 millimeter.
Further, the plate is inserted into hand-held side and is equipped with the convex block for facilitating installing and dismounting.
Compared with prior art, implementation result of the invention is as follows by the present invention:
The adjustable cavity body filter of a kind of wall thickness of the present invention, by the device for adjusting wall thickness installed on ontology,
Plate is inserted or pull out into plate seat according to actual needs, the adjusting to filter wall thickness is realized, guarantees preferable wave transparent characteristic
Or cut-off characteristics, the multi-frequency selection demand of device is realized, cost has been saved, has improved product utilization rate.
Detailed description of the invention
Fig. 1 is a kind of adjustable cavity body filter structural schematic diagram of wall thickness shown in the present invention;
Fig. 2 is the A direction view of Fig. 1;
Fig. 3 is plate schematic diagram.
Wherein, 11-shells, 12-tuning screws, 13-harmonic oscillators, 14-conductive layers, 20-device for adjusting wall thickness,
21-plate seats, 22-slots, 23-plates.
Specific embodiment
Illustrate the contents of the present invention below in conjunction with specific embodiments.
It is as shown in Figure 1 a kind of adjustable cavity body filter schematic diagram of wall thickness of the present invention, Fig. 2 show the A of Fig. 1
Direction view, the filter include ontology 10 and device for adjusting wall thickness 20, and the ontology includes shell 11, tuning screw 12, humorous
Oscillator 13 and conductive layer 14, adjusting screw rod 12 are inserted into 11 side outer wall of shell, and harmonic oscillator 13 is mounted in 11 inner cavity of shell, and position
In 12 respective side of tuning screw, tuning screw 12 can be inserted into 13 inner cavity of harmonic oscillator, and conductive layer 14 is mounted on 13 inner cavity of harmonic oscillator
In;11 4 jiaos of shell of the ontology 10 are mounted with device for adjusting wall thickness 20, and direction is parallel with adjusting screw rod 12, described
Device for adjusting wall thickness 20 includes plate seat 21, slot 22 and plate 23, and the generally upright post type of plate seat 21 is contacted with shell 11
Adjacent two sidewalls be equipped with slot 22, slot 22 penetrates through entire plate seat 21, and the slot 22 on adjacent plate seat 21 is horizontal
Alignment, plate 23 are mounted in slot.By the device for adjusting wall thickness 20 installed on ontology 10, according to actual needs by plate 23
Plate seat 21 is inserted or pull out, the adjusting to filter wall thickness is realized, guarantees preferable wave transparent characteristic or cut-off characteristics, realize
The multi-frequency of device selects demand, has saved cost, has improved product utilization rate.
The plate 23 is sheet metal, with a thickness of 1 ~ 3 millimeter, according to the plate 23 of wavelength selection respective thickness, insertion
In slot 22, realize to the preferred of electromagnetic wave.
The elastic insulated rubber that the slot 22 is installed for convenience of plate 23 is made, and while mitigating filter weight, protects
Plate 23 in card insertion slot 22 is fixed, does not loosen.
As shown in figure 3, the plate 23, which is inserted into hand-held side, is equipped with the convex block 24 for facilitating installing and dismounting, plays insertion limit and make
With while, prevent plate 23 from loosening.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.