CN101820091B - Adjustable cavity filter - Google Patents
Adjustable cavity filter Download PDFInfo
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- CN101820091B CN101820091B CN 201010164814 CN201010164814A CN101820091B CN 101820091 B CN101820091 B CN 101820091B CN 201010164814 CN201010164814 CN 201010164814 CN 201010164814 A CN201010164814 A CN 201010164814A CN 101820091 B CN101820091 B CN 101820091B
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Abstract
The invention discloses an adjustable cavity filter, which comprises a plurality of resonant cavities and a linkage element running through the plurality of resonant cavities. The bottom of each resonant cavity is provided with a resonant column, the top of the resonant column is provided with a groove, the part of the linkage element positioned in each resonant cavity is provided with a tuning element, a part of the tuning element is accommodated in the groove in a non-contact mode, and the distance between the part of the tuning element accommodated in the groove and the groove is changed along with the movement or rotation of the linkage element. The adjustable cavity filter is convenient and quick to tune the plurality of resonant cavities at the same time through the linkage element running through the plurality of resonant cavities; and the proper shape of the tuning element widens the frequency adjusting range, and can meet multiple different application requirements.
Description
Technical field
The present invention relates to a kind of filter, relate in particular to the adjustable cavity body filter of a kind of resonance frequency.
Background technology
As shown in Figure 1, the tuning of each resonant frequency is to realize by the capacitance of adjusting lc circuit in parallel in the filter prototype in the filter.Cavity filter generally includes cover plate and a plurality of resonant cavity, cover plate is used for the described a plurality of resonant cavitys of sealing, be provided with resonance post and corresponding fixing resonance frequency in each resonant cavity, these resonant cavitys cooperate with the frequency response of suitable coupling with regard to needing realizing, frequency if desired is not the resonance frequency of this resonant cavity correspondence, just need carry out tuning to each resonant cavity.Common tuning manner is installed short circuit metal or the medium screw with resonance post or cover plate in each resonant cavity, namely change the distance between resonance post and the cover plate, thereby changes the capacitance in the middle of it, reaches tuning purpose.
There is following shortcoming at least in the cavity filter of prior art:
1, each resonant cavity carries out tuningly separately, and need open cover plate usually, and tuning process is complicated, very inconvenient.
2, the regulating frequency scope is narrower, and versatility is not strong.
Summary of the invention
In order to solve the problems referred to above of prior art, the purpose of this invention is to provide that a kind of tuning process is convenient and swift, the adjustable cavity filter of regulating frequency wider range.
To achieve these goals, the invention provides a kind of adjustable cavity filter, comprise a plurality of resonant cavitys and the linkage element that runs through described a plurality of resonant cavitys, the bottom of each resonant cavity is equipped with the resonance post, the top of described resonance post is provided with groove, the part that described linkage element is positioned at each resonant cavity is equipped with tuned cell, a part of noncontact of described tuned cell is placed in described groove, and described tuned cell is placed in the part of described groove and the distance between the described groove along with the movement of described linkage element or rotation and changes.
As preferably, described linkage element is in axial direction mobile universal driving shaft, described groove is along the width gradual change of the axial direction of described universal driving shaft, described tuned cell is the strip bulge along described universal driving shaft axial direction, and described strip bulge is placed in the part of described groove and the distance between the described groove changes along with the movement of described universal driving shaft.
As preferably, the minimum widith of described groove is greater than the width of described strip bulge.
As preferably, the sidewall of described groove is provided with a plurality of micrometer adjusting screws along the axial direction of described universal driving shaft.
As preferably, the universal driving shaft of described linkage element for rotating, described tuned cell is the tuning disk of gradient thickness along the circumferential direction, and described tuning disk is placed in the part of described groove and the distance between the described groove changes along with the rotation of described universal driving shaft.
As preferably, described tuning disk has sector notch.
As preferably, described tuning disk both sides are provided with a plurality of fine setting shell fragments.
As preferably, described fine setting shell fragment is arranged at the fine setting ring, and described fine setting ring is arranged at described universal driving shaft and rotates with the rotation of described universal driving shaft.
As preferably, described tuned cell is placed in the part of described groove and the distance between the described recess sidewall along with the movement of described linkage element or rotation and changes.
As preferably, described tuned cell and described resonance post are made by metal or ceramic medium material.
Beneficial effect of the present invention is that adjustable cavity filter carries out tuning simultaneously to a plurality of resonant cavitys by the linkage element that runs through a plurality of resonant cavitys, and tuning process is convenient and swift; Suitable tuned cell shape makes regulating frequency wider range and rotate with linkage element or mobilely be substantial linear rule variation relation can satisfy multiple different application needs.
Description of drawings
Fig. 1 is the circuit theory schematic diagram of the filter of prior art;
Fig. 2 is vertical partial schematic sectional view of the adjustable cavity filter of the embodiment of the invention one;
Fig. 3 is the edge direction vertical cross-sectional schematic vertical with Fig. 2 of the adjustable cavity filter of the embodiment of the invention one;
Fig. 4 is tuning structural representation among Fig. 2;
Fig. 5 is the graph of relation that tuning displacement and resonance frequency change in the embodiment of the invention one;
Fig. 6 is vertical partial schematic sectional view of the adjustable cavity filter of the embodiment of the invention two;
Fig. 7 is the structural representation of the tuning disk among Fig. 6;
Fig. 8 is the structural representation of the fine setting ring among Fig. 6;
Fig. 9 is the graph of relation that tuning disk rotational angle and resonance frequency change in the embodiment of the invention two.
Embodiment
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.
To shown in Figure 4, the adjustable cavity filter of the embodiment of the invention one comprises cover plate 12, a plurality of resonant cavity 11 and the universal driving shaft 15 that runs through described a plurality of resonant cavity 11 tops as Fig. 2.The bottom of each resonant cavity 11 is equipped with resonance post 13.The part that universal driving shaft 15 is positioned at each resonant cavity 11 is equipped with tuning 14 (as tuned cell), tuning 14 top that is positioned at resonance post 13 in each resonant cavity 11.Described tuning 14 with described universal driving shaft 15 one-body molded or described tuning 14 be fixed in described universal driving shaft 15.When described universal driving shaft 15 in axial direction moved, the described tuning 14 described universal driving shaft 15 of companion was mobile together.
Described tuning 14 offers the groove 141 of width gradual change along universal driving shaft 15 axial directions, and the top of resonance post 13 is provided with strip bulge 131 along universal driving shaft 15 axial directions.A part of noncontact of described strip bulge 131 is contained in the groove 141, forms electric capacity between strip bulge 131 and the groove 141.Preferably, described strip bulge 131 is constant along the width of universal driving shaft 15 axial directions, and described groove 141 diminishes along the width of universal driving shaft 15 axial directions, and the minimum widith of described groove 141 is greater than the width of strip bulge 131.
When universal driving shaft 15 in axial direction moved, tuning 14 of being located on the universal driving shaft 15 was mobile thereupon.Because the width of groove 141 is gradual changes, movement along with described universal driving shaft 15, described strip bulge 131 is placed in the part of described groove 141 and the distance between the described groove 141 changes along with the movement of described universal driving shaft 15, thereby changed the capacitance that forms between strip bulge 131 and the groove 141, the resonance frequency of described resonant cavity 11 (centre frequency) changes thereupon, reaches tuning purpose.Mobile realization the by universal driving shaft 15 carried out tuning to a plurality of resonant cavitys 11 simultaneously.
In order to reduce mismachining tolerance to the influence of resonator behavior, guarantee the accuracy of each resonator resonance frequency, tuning 14 sidewall is provided with a plurality of micrometer adjusting screws 16 of arranging along groove 141 directions, described micrometer adjusting screw 16 is by finely tuning the capacitance that forms between described strip bulge 131 and the groove 141, thereby realizes the fine setting to the resonator resonance frequency.
Transfer (motor is regulated automatically) for the electricity of realizing resonance frequency, universal driving shaft 15 can be connected with motor, moved by motor drives universal driving shaft 15, make tuning convenient.Motor is controlled by supervisory control system.
Preferably, can be made by metal (as copper, aluminium, stainless steel or alloy) or ceramic medium material (as ceramic material or the ULTEM of dielectric constant 35-45) for described tuning 14.Resonance post 13 also can be made by metal (as copper, aluminium, stainless steel or alloy) or ceramic medium material (as ceramic material or the ULTEM of dielectric constant 35-45).The shape of resonance post 13 can be cylinder or cuboid etc.
Breadth Maximum by groove 141 is set and the ratio of minimum widith can be adjusted the resonance frequency adjustable range of filter.Be example with a kind of Breadth Maximum of groove 141 and the ratio of minimum widith, as shown in Figure 5, be substantial linear rule variation relation between tuning 14 displacement and the resonance frequency of filter, resonance frequency can change between 1.1GHz～2.1GHz, excursion is bigger, can satisfy multiple different application needs.
Tuning 14 of present embodiment is arranged at described universal driving shaft 15, described strip bulge 131 is arranged at the top of described resonance post 13, but it is described to be not limited to this embodiment, described tuning 14 top that also can be arranged at described resonance post 13, the top that is described resonance post 13 is provided with along the groove of described universal driving shaft 15 axial direction width gradual changes, described universal driving shaft 15 is provided with strip bulge (being about to strip bulge as tuned cell), and a part of noncontact of described strip bulge is contained in the groove.Along with the movement of described universal driving shaft 15, part and the distance between the groove that strip bulge is placed in groove change along with the movement of described universal driving shaft 15, thereby have changed the capacitance that forms between strip bulge and the groove.A plurality of micrometer adjusting screws are arranged on the sidewall of described groove along the axial direction of described universal driving shaft.
Tuning 14 groove 141 of present embodiment is along the width gradual change of universal driving shaft 15 axial directions, and strip bulge 131 is constant along the width of universal driving shaft 15 axial directions, but it is described to be not limited to this embodiment.Also can make described groove 141 constant along the width of universal driving shaft 15 axial directions, and strip bulge 131 is along the width gradual change of universal driving shaft 15 axial directions, the width of described groove 141 is greater than the Breadth Maximum of described strip bulge 131.Along with the movement of described universal driving shaft 15, described strip bulge 131 is placed in the part of described groove 141 and the distance between the described groove 141 changes along with the movement of described universal driving shaft 15.
Two sidewalls of tuning 14 groove 141 of present embodiment are along the equal run-off the straight of the axial direction of universal driving shaft 15, but it is described to be not limited to this embodiment.Also can make a sidewall of described tuning 14 groove 141 along the axial direction run-off the straight of universal driving shaft 15, and another sidewall is parallel with the axial direction of universal driving shaft 15.
To shown in Figure 8, the adjustable cavity filter of the embodiment of the invention two comprises cover plate 22, a plurality of resonant cavity 21 and the universal driving shaft 25 that runs through described a plurality of resonant cavity 21 tops as Fig. 6.The bottom of each resonant cavity 21 is equipped with resonance post 23, the part that described universal driving shaft 25 is positioned at each resonant cavity 21 is equipped with tuning disk 24, tuning disk 24 in each resonant cavity 21 is positioned at the top of resonance post 23, and described tuning disk 24 gradient thickness along the circumferential direction.Described tuning disk 24 and described universal driving shaft 25 are one-body molded, and perhaps described tuning disk 24 is fixed in described universal driving shaft 25.When described universal driving shaft 25 rotated, described tuning disk 24 rotated together in company with described universal driving shaft 25.
When described universal driving shaft 25 rotates, the tuning disk 24 that is located on the universal driving shaft 25 rotates thereupon, because the thickness of tuning disk 24 is gradual changes, rotation along with described universal driving shaft 25, described tuning disk 24 is placed in the part of described groove 231 and the distance between the described groove 231 changes along with the rotation of described universal driving shaft 25, thereby changed the capacitance that forms between tuning disk 24 and the groove 231, the resonance frequency of described resonant cavity 21 (centre frequency) changes thereupon, thereby reaches tuning purpose.Mobile realization the by universal driving shaft 25 carried out tuning to a plurality of resonant cavitys 21 simultaneously.
In order to reduce mismachining tolerance to Effect on Performance, guarantee the accuracy of each resonator resonance frequency, described tuning disk 24 both sides are provided with fine setting ring 26, can finely tune resonance frequency.Described fine setting ring 26 and described universal driving shaft 25 are one-body molded or be fixed in described universal driving shaft 25, and rotate with the rotation of described universal driving shaft 25.One side of described fine setting ring 26 is provided with the polylith shell fragment, as shown in Figure 8.After described universal driving shaft 25 turns to certain position, stir the shell fragment of contiguous described resonance post 23, change described shell fragment to the distance at described resonance post 23 tops, thereby reach the purpose of fine tuning vibration frequency.The shape of described shell fragment can freely arrange according to the needs of finely tuning, and preferred, described shell fragment is cuboid.
Transfer for the electricity of realizing resonance frequency, universal driving shaft 25 can be connected with motor, rotated by motor drives universal driving shaft 25, make tuning convenient.Motor is controlled by supervisory control system.
Preferably, described tuning disk 24 is made by metal (as copper, aluminium, stainless steel or alloy) or ceramic medium material (as ceramic material or the ULTEM of dielectric constant 35-45).Described resonance post 23 is made by metal (as copper, aluminium, stainless steel or alloy) or ceramic medium material (as ceramic material or the ULTEM of dielectric constant 35-45), and the shape of resonance post 23 is cylinder or cuboid etc.
Maximum ga(u)ge by tuning disk 24 is set and the ratio of minimum thickness can be adjusted the resonance frequency adjustable range of filter.For example, in order to obtain bigger maximum ga(u)ge and the ratio of minimum thickness, offer sector notch at tuning disk 24, namely the minimum thickness of described tuning disk 24 is zero, as shown in Figure 7.
Be example with a kind of Breadth Maximum of tuning disk 24 and the ratio of minimum widith, as shown in Figure 9, be substantial linear rule variation relation between the rotational angle of tuning disk 24 and the resonance frequency of filter, resonance frequency can change between 1.8GHz～2.6GHz, excursion is bigger, can satisfy multiple different application needs.
Above-mentioned two embodiment specify, in fact, as long as the linkage element (as above-mentioned mobile universal driving shaft 15 or rotation universal driving shaft 25) that runs through a plurality of resonant cavitys is set and is located at the tuned cell (as tuning 14 above-mentioned or tuning disk 24) that linkage element is positioned at the part of each resonant cavity, just can drive tuned cell motion (move or rotate) by the motion (mobile or rotation) of linkage element, make tuned cell in each resonant cavity and the relative distance of resonance post change, thereby change the capacitance of each resonant cavity, just can reach simultaneously a plurality of resonant cavitys are carried out tuning purpose, tuning process is convenient and swift.By the form fit of tuned cell and resonance post, can be so that resonance frequency change with the rule that the motion of linkage element is linear rule or other rules, frequency-tuning range is wideer, and adjustment process is controlled, can satisfy multiple different application needs.
Above embodiment is exemplary embodiment of the present invention only, is not used in restriction the present invention, and protection scope of the present invention is limited by additional claims.Those skilled in the art can make various modifications or be equal to replacement the present invention in essence of the present invention and protection range, this modification or be equal to replacement and also should be considered as dropping in protection scope of the present invention.
Claims (6)
1. adjustable cavity filter, comprise a plurality of resonant cavitys, the bottom of each resonant cavity is equipped with the resonance post, it is characterized in that, the top of described resonance post is provided with groove, described adjustable cavity filter also comprises the linkage element that runs through described a plurality of resonant cavitys, the part that described linkage element is positioned at each resonant cavity is equipped with tuned cell, a part of noncontact of described tuned cell is placed in described groove, the universal driving shaft of described linkage element for rotating, described tuned cell is the tuning disk of gradient thickness along the circumferential direction, and described tuning disk is placed in the part of described groove and the distance between the described groove changes along with the rotation of described universal driving shaft.
2. adjustable cavity filter according to claim 1 is characterized in that, described tuning disk has sector notch.
3. adjustable cavity filter according to claim 1 is characterized in that, described tuning disk both sides are provided with a plurality of fine setting shell fragments.
4. adjustable cavity filter according to claim 3 is characterized in that, described fine setting shell fragment is arranged at the fine setting ring, and described fine setting ring is arranged at described universal driving shaft and rotates with the rotation of described universal driving shaft.
5. adjustable cavity filter according to claim 1 is characterized in that, described tuned cell is placed in the part of described groove and the distance between the described recess sidewall changes along with the rotation of described linkage element.
6. according to the described adjustable cavity filter of one of claim 1 to 5, it is characterized in that described tuned cell and described resonance post are made by metal or ceramic medium material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010164814 CN101820091B (en) | 2010-04-29 | 2010-04-29 | Adjustable cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010164814 CN101820091B (en) | 2010-04-29 | 2010-04-29 | Adjustable cavity filter |
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| CN101820091A CN101820091A (en) | 2010-09-01 |
| CN101820091B true CN101820091B (en) | 2013-07-03 |
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| CN 201010164814 Active CN101820091B (en) | 2010-04-29 | 2010-04-29 | Adjustable cavity filter |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950833B (en) * | 2010-10-12 | 2013-06-26 | 福建星海通信科技有限公司 | Adjustable mechanical filter with uniform tuning function |
| CN103117434A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Band rejection filter |
| CN102683773B (en) | 2012-04-28 | 2014-07-09 | 华为技术有限公司 | Adjustable filter and duplexer comprising same |
| CN109103554A (en) * | 2017-06-21 | 2018-12-28 | 罗森伯格技术（昆山）有限公司 | adjustable waveguide filter |
| CN108616262A (en) * | 2018-06-11 | 2018-10-02 | 宁波华瓷通信技术有限公司 | A kind of filter frequencies tuning structure |
| CN110400997B (en) * | 2019-07-15 | 2021-07-06 | 武汉凡谷电子技术股份有限公司 | Frequency tuning device, filter and duplexer |
| CN110518317A (en) * | 2019-09-23 | 2019-11-29 | 石家庄滤通微波科技有限公司 | A kind of implementation method of no screw small cavity filter |
| CN112072232A (en) * | 2020-08-24 | 2020-12-11 | 安徽蓝讯电子科技有限公司 | Cavity filter and communication radio frequency equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1136863A (en) * | 1994-10-05 | 1996-11-27 | 诺基亚电信公司 | Dielectric resonator |
| CN1717838A (en) * | 2003-03-18 | 2006-01-04 | 菲尔特朗尼克科姆特克有限公司 | Resonator filter |
| CN1776958A (en) * | 2005-11-28 | 2006-05-24 | 浙江三维通信股份有限公司 | Cavity filter with adjustable capacitive coupling structure |
| CN1949585A (en) * | 2006-10-27 | 2007-04-18 | 镇江蓝宝石电子实业有限公司 | RF centre frequency adjustable filer |
-
2010
- 2010-04-29 CN CN 201010164814 patent/CN101820091B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1136863A (en) * | 1994-10-05 | 1996-11-27 | 诺基亚电信公司 | Dielectric resonator |
| CN1717838A (en) * | 2003-03-18 | 2006-01-04 | 菲尔特朗尼克科姆特克有限公司 | Resonator filter |
| CN1776958A (en) * | 2005-11-28 | 2006-05-24 | 浙江三维通信股份有限公司 | Cavity filter with adjustable capacitive coupling structure |
| CN1949585A (en) * | 2006-10-27 | 2007-04-18 | 镇江蓝宝石电子实业有限公司 | RF centre frequency adjustable filer |
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| CN101820091A (en) | 2010-09-01 |
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Effective date of registration: 20200316 Address after: Kunshan Dianshan Lake Town City Suzhou city Jiangsu province 215345 Shen road, No. 6 Patentee after: Rosenberg Technology Co.,Ltd. Address before: 201707 B2 workshop, No. 303, Xinke Road, Qingpu Industrial Park, Shanghai Patentee before: ROSENBERGER (SHANGHAI) TECHNOLOGY Co.,Ltd. |
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Address after: 215300 No.6 Shen'an Road, Dianshanhu Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: ProLogis Communication Technology (Suzhou) Co.,Ltd. Address before: 215345 No. 6 Shen'an Road, Dianshan Lake Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: Rosenberg Technology Co.,Ltd. |
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