CN204857914U - Dielectric filter and coupling adjusting device thereof - Google Patents
Dielectric filter and coupling adjusting device thereof Download PDFInfo
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- CN204857914U CN204857914U CN201520584278.8U CN201520584278U CN204857914U CN 204857914 U CN204857914 U CN 204857914U CN 201520584278 U CN201520584278 U CN 201520584278U CN 204857914 U CN204857914 U CN 204857914U
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- coupling
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- dielectric filter
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Abstract
The utility model relates to a dielectric filter and coupling adjusting device thereof, establish in including a plurality of medium resonant cavities the cavity, arrange in dielectric resonator and coupling adjusting device in every medium resonant cavity, the cavity includes the drain pan and covers to be established apron on the drain pan, the medium resonant cavity formed at in the drain pan, be equipped with the metal between two adjacent medium resonant cavities and cut apart the wall, the metal is cut apart and has been seted up coupling window on the wall, coupling adjusting device include the medium screw rod and with the metal coupling dish of the one end connection of medium screw rod, the apron with the corresponding position department of screw section sets up the screw hole, screw section wears out the apron and with the apron on screw looks screw lock and make the suspension of metal coupling dish in coupling window department. This dielectric filter's simple structure, control range are big to the intermodulation problem can be do not not produced, dielectric filter's electric index is satisfied. In addition, this dielectric filter low cost, be suitable for batch production.
Description
[technical field]
The utility model relates to communication device field, is specifically related to a kind of dielectric filter and regulator for coupling thereof.
[background technology]
In present mobile communication technology, microwave radio device has become requisite important component part.Filter is as a kind of basic radio frequency unit, and a series of indexs such as its insertion loss, Out-of-band rejection, passive intermodulation and power capacity have important impact for the performance of complete machine.Cavity medium filter, owing to have employed the ceramic medium material of high q-factor, compared with traditional metal coaxial cavity filter, has filter with low insertion loss, high suppression, high intermodulation, the advantage of Low Drift Temperature.The electromagnetic energy of dielectric filter mainly concentrates on dielectric resonator inside, less in air, the distribution of electromagnetic field has been different from traditional metal coaxial cavity filter completely, and thus the coupling amount of the inapplicable dielectric filter of coupling regulative mode of metal coaxial cavity filter regulates.Therefore, the coupling regulative mode of cavity medium filter is the difficult point of dielectric filter design always.
The coupling regulative mode of dielectric filter mainly contains bar adjustment anyhow, montant adjustment, cross bar adjustment and coupling disc adjustment etc. four kinds.In the dielectric filter of the existing coupled modes of bar anyhow, its coupled structure comprises coupling cross bar and coupling montant, and coupling cross bar is positioned at the inside of cavity, and is screwed on the boss of window side, and montant passes cover plate and is connected with the screwed hole on cover plate.This anyhow bar regulative mode by rotating montant so that the height of up-down adjustment montant and then regulate the size of coupling amount.The shortcoming of this mode is that adjustable range is little, only has when montant just has obvious regulating action close to during cross bar, however due to the distance of montant and cross bar very near, be a major challenge for power capacity.
The coupling amount that the cavity medium filter coupling that Fig. 4 shows TE pattern regulates is with the excursion of adjustable range, wherein, the curve of band △ shape shows the coupling amount adjustable range of cross bar adjustment, the curve of band open circles shows the coupling amount adjustable range of montant adjustment, overstriking black lines shows the coupling amount adjustable range that bar anyhow regulates.As can be seen from Figure 4, the montant regulative mode of coaxial cavity filter to the dielectric filter of TE pattern without regulating power (adjustable range is very little); Only adopt a cross bar to regulate coupling amount can obtain maximum coupling amount adjustable range, but the coupling between the dielectric cavity in cavity centre position cannot realize by adopting cross bar, and cross bar regulative mode not easily realize water-proof function; And in bar regulative mode anyhow, after fixed transverse rod, when montant distance transverse rod is far away, coupling amount is substantially constant, the coupling amount when montant is near cross bar is only had just can obviously to increase, but due to the distance between two bars too near, another one problem can be brought: the possibility of sparking increases, and affects power capacity.
[utility model content]
The purpose of this utility model is to provide the dielectric filter that a kind of structure is simple, coupling amount adjustable range is large.
For realizing this object, the utility model adopts following technical scheme:
A kind of dielectric filter, the cavity of at least two dielectric resonant chambers is established in comprising, be placed in the dielectric resonator of described each dielectric resonant chamber, and to be located between adjacent two dielectric resonant chambers and for regulating the regulator for coupling of coupling amount therebetween, described cavity comprises drain pan and covers the cover plate be located on described drain pan, described dielectric resonant chamber is formed in described drain pan, metal segmentation wall is provided with between adjacent two dielectric resonant chambers, described each metal segmentation wall offers coupling window, described regulator for coupling comprises the medium screw rod that its one end is provided with threaded shank and the metal Coupling dish be connected with the described medium screw rod other end, described cover plate offers screwed hole in the position corresponding to described threaded shank, described threaded shank passes described cover plate and makes metal Coupling dish be suspended in described coupling window place with the screwed hole phase screw lock on cover plate.
Compared with prior art, the utility model possesses following advantage:
Dielectric filter of the present utility model adopts the regulator for coupling comprising medium screw rod and metal Coupling dish to regulate the coupling amount between adjacent two dielectric resonant chambers, adjustable range is large, and can not intermodulation issues be produced, meet the electrical specifications of dielectric filter.In addition, simple, the power capacity of the structure of this regulator for coupling large and with low cost, be easy to batch production.
Preferably, described metal Coupling dish is arranged so that the mid point between adjacent two dielectric resonant chambers is positioned on the axis of described metal Coupling dish, has larger coupling amount adjustable range to make this dielectric filter.
More preferably, distance between described metal Coupling dish and described dielectric resonator is 2mm, to make the distance between metal Coupling dish and dielectric resonator moderate, avoid apart from the too small and power capacity problem that produces and apart from the excessive and not obvious problem of regulating effect that is that bring.
Preferably, described regulator for coupling also comprises two banking stops be socketed on described medium screw rod, and described two banking stops contact with the corresponding end-faces in described metal Coupling dish two end faces respectively.
Preferably, the middle part of described metal Coupling dish is provided with through hole, and described medium screw rod and described metal Coupling dish are fixed by injection moulding, and medium screw rod and two banking stops pass through injection moulding integrated molding, to make the connection of metal Coupling dish and medium screw rod comparatively firm, consistency is got well and is convenient to batch production.
More preferably, described medium screw rod adopts PEI material to make.
Another object of the present invention is to provide a kind of regulator for coupling, comprise the medium screw rod that its one end is provided with threaded shank and the metal Coupling dish be connected with this medium screw rod other end.
Further, this regulator for coupling also comprises two banking stops be socketed on described medium screw rod, and described two banking stops contact with the corresponding end-faces in described metal Coupling dish two end faces respectively.
Preferably, the middle part of described metal Coupling dish is provided with through hole, and described medium screw rod and described metal Coupling dish are fixed by injection moulding.
Preferably, described medium screw rod adopts PEI material to make.
[accompanying drawing explanation]
Fig. 1 is the structure cutaway view of dielectric filter of the present utility model, illustrates the internal structure of this dielectric filter;
Fig. 2 is the partial schematic diagram after the dielectric filter removal cover plate of an execution mode of the present utility model;
Fig. 3 a-3b respectively show the stereogram of the regulator for coupling of the dielectric filter shown in Fig. 1;
Fig. 4 is the coupling discharge curve figure of common coupling regulative mode, and wherein, the curve of band filled circles represents the adjustment curve of metal Coupling dish.
[embodiment]
Be further described the utility model below in conjunction with accompanying drawing and exemplary embodiment, wherein identical in accompanying drawing label all refers to identical parts.In addition, if the detailed description of known technology is for illustrating that feature of the present utility model is unnecessary, then omitted.
Fig. 1 to Fig. 4 collectively illustrates dielectric filter 100 of the present utility model, comprise the cavity 1 with some dielectric resonant chambers 13, the dielectric resonator 2 being placed in described each dielectric resonant chamber 13, and to be arranged between adjacent two dielectric resonant chambers 13 and for regulating the regulator for coupling 3 of coupling amount between the two.
Incorporated by reference to Fig. 2, the cover plate 12 that described cavity 1 comprises drain pan 11 and fastens with this drain pan 11, the madial wall (non-label) of described drain pan 11 stretches out multiple metal segmentation wall 5, the inner space of drain pan 11 is divided into multiple such as three above-mentioned dielectric resonant chambers 13 by described multiple metal segmentation wall 5, and be provided with coupling window 4 between adjacent two dielectric resonant chambers 13, and the dielectric resonator 2 be respectively provided with in each dielectric resonant chamber 13 described in, to realize the coupling of signal between three dielectric resonant chambers 13 by described coupling window 4.Particularly, described each dielectric resonant chamber 13 is the dielectric resonant chamber of TE pattern, and described coupling window 4 is located in described metallic walls 5.
Described regulator for coupling 3 is suspended in described coupling window 4 place, and it comprises medium screw rod 31 and metal Coupling dish 32.One end of described medium screw rod 31 is provided with threaded shank (non-label, lower same), and described metal Coupling dish 32 is connected with the other end of described medium screw rod 31.Described cover plate 12 offers screw (non-label in the position corresponding to described medium screw rod 31, lower same), described threaded shank through described cover plate 12 and with the screw phase screw lock of described cover plate 12, described coupling window 4 place is suspended in make described metal Coupling dish 32, and make described metal Coupling dish 32 along its axial-movement by the described threaded shank of rotating media screw rod 31, to change the height of metal Coupling dish 32 in cavity, and then change the capacitance size at coupling window place, and then change the coupling amount of signal at corresponding dielectric resonant chamber 13.
See Fig. 4, the coupling amount of dielectric filter 100 of the present utility model in adjustment process with the variation tendency of adjustable range as shown in the curve with filled circles in Fig. 4.As can be seen from this figure, the coupling amount of dielectric filter 100 of the present utility model is along with the increase first increases and then decreases of adjustable range, when metal Coupling dish extend into harmonic oscillator (the non-label of dielectric resonator 2, time near medium position down together) in short transverse, coupling amount reaches maximum.The coupling discharge curve that this dielectric filter 100 is applied when coupling disc regulates is normal distribution curve.
Incorporated by reference to table 1, table 1 discloses the coupling amount excursion of above-mentioned four kinds of coupling regulative modes.As can be seen from Table 1, the coupling amount adjustable range of this dielectric filter is 0.024 ~ 0.031dB, and regulate relative to existing bar anyhow and montant adjustment, the adjustable range of dielectric filter of the present utility model is wider.
Table 1 is coupled, and regulative mode is corresponding with coupling amount excursion to be shown
| Coupling regulative mode | Coupling amount excursion |
| Cross bar | 0.025～0.065 |
| Montant | 0.024～0.025 |
| Anyhow bar | 0.025～0.03 |
| Coupling disc | 0.024～0.031 |
Dielectric filter 100 of the present utility model adopts the regulative mode of coupling disc to regulate the coupling amount between adjacent media resonant cavity 13, and the dielectric filter 100 being achieved the larger adjustable extent of coupling amount by simple structure is designed.In addition, medium screw rod 31 is adopted to be connected with cover plate 12 and metal Coupling dish 32, described medium screw rod 31 not easily comes off from cover plate 12 when this dielectric filter is used for high temperature in high-power, cavity, medium screw rod 31 also can not produce intermodulation with metal Coupling dish 32, meets the intermodulation index request of this dielectric filter 100.
Preferably, described metal Coupling dish 32 preferably adopts aluminium to make, and to make this dielectric filter 100 complete machine comparatively light, and reduces cost to a certain extent.
Described medium screw rod 31 preferably adopts PEI (Polyetherimide, Polyetherimide) make, to make, this medium screw rod 31 hardness is high, loss angle is little, and power capacity is large and come off from cover plate when can not become high temperature because of high-power in this dielectric filter 100 inside.
Preferably, described regulator for coupling 3 is also arranged with two banking stops 33 (see Fig. 3 a and Fig. 3 b) at the other end of medium screw rod 31, and described two banking stops 33 contact with the corresponding end-faces in two end faces of described metal Coupling dish 32 respectively.Particularly, described banking stop 33 generates along described medium screw rod 31 radial direction.
More preferably, described metal Coupling dish 32 is fixed by injection moulding with described medium screw rod 31.Specifically, described regulator for coupling 3 usable central offers metal Coupling dish injection mo(u)lding in the mould preset of through hole (non-label), thus generate described medium screw rod 31 and banking stop 33, to make, the connection of medium screw rod 31 and metal Coupling dish 32 is comparatively firm, consistency is good, and is convenient to batch production.
Preferably, described metal Coupling dish 32 is positioned at the mid point of adjacent two dielectric resonant chambers 13 and symmetrical, and the mid point also namely between two dielectric resonant chambers 13 is positioned on the axis of described metal Coupling dish 32, to obtain larger adjustable range.
Further, when assembling this dielectric filter 100, the distance between the harmonic oscillator of metal Coupling dish 32 and dielectric resonator 2 is also moderate, this is because the too little meeting of the distance of the two causes power capacity problem, apart from excessive, causes regulating effect not obvious.Described metal Coupling dish 32 is preferably 2mm with the distance of harmonic oscillator.
Although shown exemplary embodiments more of the present utility model above, but it should be appreciated by those skilled in the art that, when not departing from principle of the present utility model or spirit, can make a change these exemplary embodiments, scope of the present utility model is by claim and equivalents thereof.
Claims (10)
1. a dielectric filter, the cavity of at least two dielectric resonant chambers is established in comprising, be placed in the dielectric resonator of described each dielectric resonant chamber, and to be located between adjacent two dielectric resonant chambers and for regulating the regulator for coupling of coupling amount therebetween, described cavity comprises drain pan and covers the cover plate be located on described drain pan, described dielectric resonant chamber is formed in described drain pan, metal segmentation wall is provided with between adjacent two dielectric resonant chambers, described each metal segmentation wall offers coupling window, it is characterized in that, described regulator for coupling comprises the medium screw rod that its one end is provided with threaded shank and the metal Coupling dish be connected with the described medium screw rod other end, described cover plate offers screwed hole in the position corresponding to described threaded shank, described threaded shank passes described cover plate and makes metal Coupling dish be suspended in described coupling window place with the screwed hole phase screw lock on cover plate.
2. dielectric filter according to claim 1, is characterized in that, described metal Coupling dish is arranged so that the mid point between adjacent two dielectric resonant chambers is positioned on the axis of described metal Coupling dish.
3. dielectric filter according to claim 2, is characterized in that, described adjacent two dielectric resonators are 2mm with the distance being positioned at this metal Coupling dish between the two.
4. dielectric filter according to claim 1, it is characterized in that, described regulator for coupling also comprises two banking stops be socketed on described medium screw rod, and described two banking stops contact with the corresponding end-faces in described metal Coupling dish two end faces respectively.
5. the dielectric filter according to claim 1 or 4, is characterized in that, the middle part of described metal Coupling dish is provided with through hole, and described medium screw rod and described metal Coupling dish are fixed by injection moulding.
6. dielectric filter according to claim 1, is characterized in that, described medium screw rod adopts PEI material to make.
7. a regulator for coupling, is characterized in that, comprises the medium screw rod that its one end is provided with threaded shank and the metal Coupling dish be connected with this medium screw rod other end.
8. regulator for coupling according to claim 7, is characterized in that, also comprises two banking stops be socketed on described medium screw rod, and described two banking stops contact with the corresponding end-faces in described metal Coupling dish two end faces respectively.
9. regulator for coupling according to claim 7, is characterized in that, the middle part of described metal Coupling dish is provided with through hole, and described medium screw rod and described metal Coupling dish are fixed by injection moulding.
10. regulator for coupling according to claim 7, is characterized in that, described medium screw rod adopts PEI material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520584278.8U CN204857914U (en) | 2015-08-05 | 2015-08-05 | Dielectric filter and coupling adjusting device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520584278.8U CN204857914U (en) | 2015-08-05 | 2015-08-05 | Dielectric filter and coupling adjusting device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN204857914U true CN204857914U (en) | 2015-12-09 |
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| CN201520584278.8U Active CN204857914U (en) | 2015-08-05 | 2015-08-05 | Dielectric filter and coupling adjusting device thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149035A (en) * | 2017-06-15 | 2019-01-04 | Ace技术株式会社 | The cavity filter with mixing nut bolt is reduced using PIMD |
-
2015
- 2015-08-05 CN CN201520584278.8U patent/CN204857914U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149035A (en) * | 2017-06-15 | 2019-01-04 | Ace技术株式会社 | The cavity filter with mixing nut bolt is reduced using PIMD |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170208 Address after: 510663 Guangzhou Science City, Guangdong Shenzhou Road, No. 10 Patentee after: Comba Telecom Systems (China) Co. Ltd. Patentee after: Jingxin Communication Technology (Guangzhou) Co., Ltd. Patentee after: Comba Telecom Systems (Guangzhou) Co., Ltd. Patentee after: TIANJIN COMBA TELECOM SYSTEMS CO., LTD. Address before: 510663 Guangdong city of Guangzhou Province Economic and Technological Development Zone Jinbi Road No. 6 Patentee before: Jingxin Communication Technology (Guangzhou) Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200120 Address after: 510730 No. 6, layered Road, Guangzhou economic and Technological Development Zone, Guangdong Patentee after: Jingxin Communication Technology (Guangzhou) Co., Ltd. Address before: 510663 Guangzhou Science City, Guangdong Shenzhou Road, No. 10 Co-patentee before: Jingxin Communication Technology (Guangzhou) Co., Ltd. Patentee before: Jingxin Communication System (China) Co., Ltd. Co-patentee before: Jingxin Communication System (Guangzhou) Co., Ltd. Co-patentee before: TIANJIN COMBA TELECOM SYSTEMS CO., LTD. |