CN207183476U - low passive intermodulation dielectric waveguide filter - Google Patents
low passive intermodulation dielectric waveguide filter Download PDFInfo
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- CN207183476U CN207183476U CN201720950875.7U CN201720950875U CN207183476U CN 207183476 U CN207183476 U CN 207183476U CN 201720950875 U CN201720950875 U CN 201720950875U CN 207183476 U CN207183476 U CN 207183476U
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- dielectric waveguide
- waveguide filter
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- coupling window
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Abstract
Wave filter technology field is the utility model is related to, discloses a kind of low passive intermodulation dielectric waveguide filter, including several medium single-chambers, the medium single-chamber is sequentially connected by coupling window, and seamed edge is provided with fillet structure.Compared to prior art, the beneficial effects of the utility model are：By way of fillet processing is done to the seamed edge of dielectric waveguide filter, can improve dielectric waveguide filter by silver-colored performance, substitute rectangular edge, make by silver-colored uniform, dielectric waveguide filter be also add by the linear property of silver layer, reduce the current density of seamed edge position, reduce the passive intermodulation of whole dielectric waveguide filter.The anti-collision energy of dielectric waveguide filter can be improved, improve dielectric waveguide filter yields；Increase the reliability of production；Avoid occurring to hurt the accident of staff because square edge is excessively sharp.
Description
Technical field
Wave filter technology field is the utility model is related to, in particular it relates to a kind of low passive intermodulation dielectric waveguide filter.
Background technology
Wave filter is a kind of frequency selective device, can make in signal specific frequency content by the way that and it is other greatly to decay
Frequency content.Waveguide filter is one kind in the wave filter used in communication system, and traditional waveguide filter is metal
Cavity body structure, centre are air, and metal material is that edge plays a part of electromagnetic shielding and structural support.Traditional guide filter
Device has higher Q values, but volume and weight are larger, and production cost is high, is unfavorable for installing and transports.With the hair of communication system
Exhibition, it is desirable to which wave filter has a filter with low insertion loss, and height suppresses, and it is big to bear power, low cost, the features such as miniaturization.
Passive intermodulation is inevitable phenomenon in all microwave devices, is mainly produced by the non-linear property of device.Two
Or more frequency intermodulated at non-linear placement produce spurious signal be intermodulation product.In a wireless communication system,
The intermodulation product as caused by transmitting frequency range, which is easy to fall into it, receives frequency range, and falls into and receive the intermodulation product of frequency range and hardly result in
Effectively filter out, a big chunk energy directly enters receiver, the normal work of resultant interference receiver by receiving filter
Make, reduce the sensitivity of communication system.With the development of communication system and the raising of quality, the requirement for passive intermodulation index
Also more and more higher, to meet higher communication quality, higher passive intermodulation requirement is proposed to communication equipment.
Dielectric waveguide filter is as one of which passive device, and a nonlinear device；Dielectric filter device
In non-linear position it is a lot, including dielectric material non-linear property in itself, can in medium block such as dielectric material Density inhomogeneity
Tiny coarse bumps be present in Minute pores existing for energy, medium block surface；Also include the non-linear property of electro-magnetic screen layer, it is such as silver-colored
Contain impurity in layer, it is uneven by silver thickness, by silver layer crack；Also include the non-linear property of radio frequency connector, as radio frequency connects
The defective products of device, radio frequency connector and dielectric waveguide filter contact weld are bad etc..
We can select radio frequency connector of good performance, using good welding procedure, high-purity by silvering solution etc.
Method reduces passive intermodulation.Although these methods have some improvement, but still be apparent not enough.Medium ripple in the prior art
Waveguide filter typically does medium single-chamber using regular rectangular shape chamber or cylindrical cavity, and couples the regular shape that bridge is also selection
Window, the edge of such dielectric waveguide filter is often right angle；When dielectric waveguide filter, which is done, to be handled by silver, often
At the center in each face of dielectric waveguide filter by silver-colored good, and at the edge in face it is the seamed edge position quilt of dielectric waveguide filter
Silver is bad, and this adds increased the non-linear property of seamed edge position, while seamed edge position is the current channel of electromagnetic field, current density
Greatly, a large amount of passive intermodulation products are produced, influence the passive inter-modulation performance of dielectric waveguide filter.In order to obtain more preferable medium ripple
Waveguide filter passive inter-modulation performance to the structure of existing dielectric filter wave guide, it is necessary to be improved.
Utility model content
In order to solve technical problem existing for above-mentioned background technology, the utility model provides a kind of low passive intermodulation medium
Waveguide filter, by improving the bad by silver of dielectric waveguide filter seamed edge position, the current density of seamed edge position is reduced, is increased
Add by the linear properties of silver layer, to reduce passive intermodulation, it is maintained at acceptability limit.
In order to realize above-mentioned technique effect, technical scheme is used by the utility model：Low passive intermodulation Medium Wave Guide
Wave filter, including several medium single-chambers, the medium single-chamber are sequentially connected by coupling window；Medium single-chamber positioned at end
Provided with the interface for connecting radio frequency connector；The surface of medium single-chamber and coupling window is equipped with electro-magnetic screen layer, and seamed edge
Provided with fillet structure；The electro-magnetic screen layer on the medium single-chamber surface and the outer conductor of radio frequency connector are welded to each other.
It is preferred that the height H of the coupling window is equal to the height of medium single-chamber, the width L for coupling window is small
In the width of medium single-chamber；Or the height H of the coupling window is less than the height of medium single-chamber, the width L for coupling window is equal to
The width of medium single-chamber, having coupling window and medium single-chamber, two faces are coplanar, to reduce the seamed edge number of dielectric waveguide filter
Amount.
It is preferred that the coupling window uses perceptual through-hole form, coupling window and medium single-chamber is set there are four
Face is coplanar, to reduce the seamed edge quantity of dielectric waveguide filter.
It is preferred that the medium single-chamber and coupling window are solid whole made of microwave ceramic dielectric material
Body.
It is preferred that the electro-magnetic screen layer is by silver layer, wave filter working frequency range is more than by the thickness of silver layer
Skin depth.
Compared to prior art, the beneficial effects of the utility model are：
1st, by way of fillet processing is done to the seamed edge of dielectric waveguide filter, dielectric waveguide filter can be improved
By silver-colored performance, rectangular edge is substituted, makes by silver uniformly, to also add dielectric waveguide filter by the linear property of silver layer, reduction rib
The current density of side position, reduce the passive intermodulation of whole dielectric waveguide filter.
2nd, by way of fillet processing is done to the seamed edge of dielectric waveguide filter, dielectric waveguide filter can be improved
Anti-collision energy, improve dielectric waveguide filter yields.
3rd, when dielectric waveguide filter is produced in enormous quantities, corresponding mould equally does corresponding fillet and handled, and mould
Corners processing reduces the drawing-die in dielectric waveguide filter production, mold sticking, increases the reliability of production.
4th, fillet processing is done to the seamed edge of dielectric waveguide filter, the process producing and using dielectric waveguide filter
In, it can avoid occurring to hurt the accident of staff because square edge is excessively sharp.
Dielectric waveguide filter of the present utility model uses the replacement air of the microwave ceramic dielectric material of high-k
Part, electromagnetic shielding action, such Jie are played by silver as conduction electromagnetic wave and structural support effect, while on medium block surface
Matter waveguide filter can be substantially reduced the volume and cost of wave filter, meet that filter with low insertion loss, high suppression, high power etc. require.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment 1；
Fig. 2 is the front view of embodiment 1；
Fig. 3 is the top view of embodiment 1；
Fig. 4 is the left view of embodiment 1；
Fig. 5 is the structural representation of embodiment 2；
Component names corresponding to mark are as follows in accompanying drawing：1 is medium single-chamber, and 2 be coupling window, and 3 be radio frequency connector, 4
It is perceptual through hole for fillet structure, 5.D is the length of coupling window, and L is the width of coupling window, and H is the height of coupling window.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As Figure 1-4, the utility model can be implemented as follows, low passive intermodulation dielectric waveguide filter, bag
Several medium single-chambers 1 are included, the medium single-chamber 1 is sequentially connected by coupling window 2, and medium single-chamber 1 is whole with coupling window 2
Body structure, constitute whole product；Medium single-chamber 1 positioned at end is provided with the interface for being used for connecting radio frequency connector 3；Medium list
The surface of chamber 1 and coupling window 2 is equipped with electro-magnetic screen layer, and seamed edge is provided with fillet structure 4；The surface of medium single-chamber 1
The outer conductor of electro-magnetic screen layer and radio frequency connector 3 is welded to each other, and fix connector and ground connection effect.For the fillet of seamed edge
Processing, is not necessarily intended to whole roundings, is determined on a case-by-case basis, and the performance indications affirmative of certain whole roundings is more preferable.
As shown in Figure 2,3, when producing dielectric waveguide filter, whole dielectric material is processed, in the position of coupling window
The deep trouth for processing certain depth is put, forms coupling window 2, the length D of coupling window 2 is less than the length of medium single-chamber 1.It is described
The height H for coupling window 2 is equal to the height of medium single-chamber 1, and the width L of coupling window 2 is less than the width of medium single-chamber 1；Or institute
The height H for stating coupling window 2 is less than the height of medium single-chamber 1, and the width L of coupling window 2 is equal to the width of medium single-chamber 1.Make
Coupling window 2 has that two faces are coplanar with medium single-chamber 1, passive so as to reduce to reduce the seamed edge quantity of dielectric waveguide filter
Intermodulation.
The electro-magnetic screen layer is the skin depth for being more than wave filter working frequency range by the thickness of silver layer by silver layer, is met
While good electromagnetic shielding needs, prevent because being imitated by abrasion during silver layer oxidation or production and application etc. to electromagnetic shielding
The influence of fruit.In addition, the electric conductivity of silver is good, oxidation rate is slow and oxidation product is electrically conductive, and thermal conductivity is good, medium-resistance pole
Good, shield effectiveness is splendid.
The medium single-chamber 1 and coupling window 2 are the solid entirety made of microwave ceramic dielectric material.The dielectric material
With higher dielectric constant and relatively low dielectric loss, while there is the structural support of high intensity.Set by the dielectric material
The dielectric filter counted out has miniaturization, and high stability, low-loss is in light weight, and cost is low, and it is a variety of excellent that technique is simpler etc.
Point, it is well positioned to meet the minimizing of following wave filter, high performance requirement.
Embodiment 2
As shown in figure 5, compared to embodiment 1, the coupling window 2 in the present embodiment uses the perceptual form of through hole 5, makes coupling
Window 2 has that four faces are coplanar with medium single-chamber 1, further to reduce the seamed edge quantity of dielectric waveguide filter.
The passive device such as other kinds of wave filter, duplexer or combiner can be spreaded to according to principle of the present utility model
Part.Dielectric waveguide filter described in the utility model, both ends are respectively equipped with a signal input interface and a letter
Number output interface.The utility model include arbitrary medium single-chamber form, arbitrarily coupling window form, arbitrarily walk chamber form it is (unlimited
In linear pattern, L-type, U-shaped or Z-type).
Above-mentioned word is preferred embodiment of the present utility model, it is therefore intended that illustrates the utility model, not limiting
The scope of protection of the utility model, it is all within the spirit and principles of the utility model, any modification for being made, equivalent substitution,
Improve etc., it should be included within the scope of protection of the utility model.
Claims (5)
1. low passive intermodulation dielectric waveguide filter, it is characterised in that：Including several medium single-chambers (1), the medium single-chamber
(1) it is sequentially connected by coupling window (2)；Medium single-chamber (1) positioned at end, which is provided with, to be used to connect connecing for radio frequency connector (3)
Mouthful；The surface of medium single-chamber (1) and coupling window (2) is equipped with electro-magnetic screen layer, and seamed edge is provided with fillet structure (4)；It is described
The outer conductor of the electro-magnetic screen layer and radio frequency connector (3) on medium single-chamber (1) surface is welded to each other.
2. low passive intermodulation dielectric waveguide filter according to claim 1, it is characterised in that：The coupling window (2)
Height H be equal to medium single-chamber (1) height, coupling window (2) width L be less than medium single-chamber (1) width；Or the coupling
The height H for closing window (2) is less than the height of medium single-chamber (1), and the width L of coupling window (2) is equal to the width of medium single-chamber (1)
Degree, having coupling window (2) and medium single-chamber (1), two faces are coplanar, to reduce the seamed edge quantity of dielectric waveguide filter.
3. low passive intermodulation dielectric waveguide filter according to claim 1, it is characterised in that：The coupling window (2)
Using perceptual through hole (5) form, having coupling window (2) and medium single-chamber (1), four faces are coplanar, to reduce Medium Wave Guide filtering
The seamed edge quantity of device.
4. low passive intermodulation dielectric waveguide filter according to claim 1, it is characterised in that：The medium single-chamber (1)
It is the solid entirety made of microwave ceramic dielectric material with coupling window (2).
5. low passive intermodulation dielectric waveguide filter according to claim 1, it is characterised in that：The electro-magnetic screen layer is
By silver layer, the skin depth of wave filter working frequency range is more than by the thickness of silver layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720113651 | 2017-02-07 | ||
| CN2017201136510 | 2017-02-07 |
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| Publication Number | Publication Date |
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| CN207183476U true CN207183476U (en) | 2018-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720950875.7U Active CN207183476U (en) | 2017-02-07 | 2017-08-01 | low passive intermodulation dielectric waveguide filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022028630A3 (en) * | 2020-11-26 | 2022-03-31 | 顺络(上海)电子有限公司 | Ceramic dielectric filter |
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2017
- 2017-08-01 CN CN201720950875.7U patent/CN207183476U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022028630A3 (en) * | 2020-11-26 | 2022-03-31 | 顺络(上海)电子有限公司 | Ceramic dielectric filter |
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