CN103296372A - Resonance cavity - Google Patents
Resonance cavity Download PDFInfo
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- CN103296372A CN103296372A CN2012100517432A CN201210051743A CN103296372A CN 103296372 A CN103296372 A CN 103296372A CN 2012100517432 A CN2012100517432 A CN 2012100517432A CN 201210051743 A CN201210051743 A CN 201210051743A CN 103296372 A CN103296372 A CN 103296372A
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- resonant cavity
- harmonic oscillator
- tuning dish
- hole
- cavity
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Abstract
The invention relates to a resonance cavity which comprises a cavity body and a harmonic oscillator arranged in the cavity body. A first through hole is formed in the middle of the harmonic oscillator. The resonance cavity further comprises a tuning disc which is straightly directed at the harmonic oscillator and provided with a second through hole coaxial with the first through hole. A mode field which is identical with the neighborhood of the harmonic oscillator can be formed near the tuning disc provide with the through hole so as to enlarge influences on a resonance frequency of the resonance cavity and widen a frequency adjusting range of the tuning disc.
Description
Technical field
The present invention relates to radio-frequency devices, more particularly, relate to a kind of resonant cavity.
Background technology
Resonant cavity is the pith of dielectric filter, and specific resonant cavity has specific resonance frequency.Have a cavity at resonant cavity, put into medium with definite shape such as pottery in the cavity as harmonic oscillator, can obtain required pattern such as TE mould or TM mould or various modes, different pattern correspondences different resonance frequencys.As shown in Figure 1, form an enclosure space thereby the cavity of resonant cavity 2 is provided with chamber lid 1, the cylindrical harmonic oscillator 3 of through hole is arranged in the middle of putting in the space.For the resonance frequency to resonant cavity is adjusted, directly over harmonic oscillator 3, be provided with the disk 5 that a medium such as pottery are made, by the distance that the connecting rod 4 that connects on the disk 5 is regulated between disk 5 and the harmonic oscillator 3, can adjust the resonance frequency of resonant cavity within the specific limits.But shortcoming is, when the dielectric constant of ceramic resonance in the chamber is very high, because electromagnetic field is all concentrated oscillator inside, make oscillator outside in the chamber field intensity very a little less than, this has just caused the frequency-tuning range of disk 5 very limited, sometimes even several million scope can only be arranged, and this tuning range generally need satisfy 5%～15% of relative bandwidth, so the oscillator dielectric constant is too high in the chamber, perhaps bandwidth surpasses 100,000,000 or demand wideer the time, this tuner acts on very unobvious concerning resonant cavity.
Summary of the invention
The technical problem to be solved in the present invention is, at the above-mentioned disk of the prior art adjustable range smaller defect to resonance frequency, provides a kind of resonance frequency adjustable range wide resonant cavity.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of resonant cavity, comprise cavity and the harmonic oscillator that is positioned at described cavity, be provided with first through hole in the middle of the described harmonic oscillator, described resonant cavity also comprises tuning dish, and described tuning dish faces described harmonic oscillator and has second through hole coaxial with described first through hole.
In resonant cavity of the present invention, described resonant cavity also comprises and is connected on the described tuning dish to regulate described tuning dish to the governor motion of the distance of harmonic oscillator.
In resonant cavity of the present invention, described governor motion is to be fixedly connected on the described tuning dish and to reach the outer connecting rod of cavity.
In resonant cavity of the present invention, described governor motion comprises the gear that is fixedly connected on the described tuning dish and stretches out the outer tooth bar of cavity and cooperate with it.
In resonant cavity of the present invention, described harmonic oscillator is the middle cylindrical structural that is provided with through hole.
In resonant cavity of the present invention, the external diameter of described tuning dish is identical with described harmonic oscillator external diameter, and first through hole is identical with the diameter of second through hole.
In resonant cavity of the present invention, the thickness of described tuning dish is much smaller than the height of described harmonic oscillator.
In resonant cavity of the present invention, described harmonic oscillator is positioned at described resonant cavity middle, and height is less than 1/2nd of resonant cavity.
In resonant cavity of the present invention, the material of described tuning dish is metal.
In resonant cavity of the present invention, the material of described tuning dish is silver, copper or gold.
Implement resonant cavity of the present invention, have following beneficial effect: can form and near the identical mould field of harmonic oscillator near being provided with the tuning dish of through hole, thereby to the influence increase of the resonance frequency of resonant cavity, improve the frequency adjustment range of tuning dish.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the cutaway view of the resonant cavity of prior art;
Fig. 2 is the cutaway view of the resonant cavity of the preferred embodiment of the present invention.
Embodiment
The present invention relates to a kind of resonant cavity, as shown in Figure 2, comprise the input that arranges respectively on the sidewall of cavity 20,20 two opposing parallel of cavity and output (not shown), should cavity 20 form enclosure spaces chamber lid 10, place harmonic oscillator 30 in this enclosure space, directly over the harmonic oscillator 30 tuning dish 50 and be connected tuning dish 50 and stretch out the governor motion that 10 outsides are covered in the chamber.This governor motion is in order to regulating tuning dish 50 to the distance of harmonic oscillator 30, and the governor motion of present embodiment is to be fixedly connected on the tuning dish 50 and to reach the connecting rod 40 that 10 outsides are covered in the chamber.
In the present embodiment, harmonic oscillator 30 is cylindrical, and the centre is provided with first through hole of central shaft altogether, and the height of harmonic oscillator 30 greatly about resonant cavity 1/2nd to 1/5th between for example about 1/3rd, and (bottom can be by electromagnetic wave transparent material such as alumina-supported to be positioned at the resonant cavity middle, not shown), i.e. the center concurrent of the center of harmonic oscillator and resonant cavity is in order to form the electromagnetic field of TE pattern.Tuning dish 50 faces harmonic oscillator 30, and namely tuning dish 50 is parallel to or perpendicular to the axis of harmonic oscillator 30.Tuning dish 50 is disc, and the external diameter of disk is identical with the cylinder external diameter of harmonic oscillator 30; Tuning dish 50 is provided with second through hole 51, and second through hole 51 is total to central shaft with first through hole of harmonic oscillator 30 and internal diameter equates.Therefore, tuning dish 50 has the shape identical with harmonic oscillator 30, and is just highly different, will form near therefore can tuning dish 50 and harmonic oscillator 30 model identical are the mould field of TE01d pattern.For regulating frequency and don't have influence on the effect of 30 pairs of patterns of harmonic oscillator, and reduce the loss that metal produces, the thickness of tuning dish 50 is less than the height of described harmonic oscillator 30, preferably less than the latter 7 to 1/8th in addition littler.In addition, tuning dish 50 can adopt dielectric material such as the pottery identical with harmonic oscillator 30, and in order to increase regulating effect, preferred metal materials is silver, copper, gold etc. for example.
The present invention is exactly by arranging through hole at tuning dish 50, makes to form the TE pattern identical with harmonic oscillator near the tuning dish 50, thereby influences the resonance frequency of resonant cavity.For example, in the embodiment shown in Figure 2, adopt cavity 20 and the chamber lid 10 of aluminum, cavity space is 40mm * 40mm * 40mm, and the harmonic oscillator 30 that pottery is made highly is 10mm, external diameter 26mm, internal diameter 8mm, tuning dish 50 external diameter 26mm, internal diameter 8mm, thickness 1mm.It is moving range H that tuning dish 50 moves to harmonic oscillator 30 upper surfaces by connecting rod 40 from top, and the regulated quantity of its resonance frequency is 293MHz.And adopt identical cavity, chamber lid and harmonic oscillator, and use traditional dielectric tuning dish, other conditions do not change, and the frequency-tuning range that records resonant cavity only is 28MHz.As seen, through hole is set, and after using the metal adjustment disk of this programme design, can strengthens the frequency-tuning range of tuning dish 50 greatly.
Harmonic oscillator of the present invention is not limited in cylindrical, also can for existing different shape as cutting one jiao cylindrical, square column type, triangular prism shaped etc.The shape of tuning dish can be identical with harmonic oscillator, also can be inequality, and the coaxial axis conllinear that refers to the two of first through hole and second through hole also comprises conllinear not but two through holes have overlapping situation along the projection of axis direction.In addition, governor motion is not defined as connecting rod, can be the gear that is fixedly connected on the described tuning dish and stretches out the outer tooth bar of cavity and cooperate with it yet, and perhaps other existing energy produce straight-line mechanism.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (10)
1. resonant cavity, comprise cavity and the harmonic oscillator that is positioned at described cavity, is provided with first through hole in the middle of the described harmonic oscillator, it is characterized in that, described resonant cavity also comprises tuning dish, and described tuning dish faces described harmonic oscillator and has second through hole coaxial with described first through hole.
2. resonant cavity according to claim 1 is characterized in that, described resonant cavity also comprises and is connected on the described tuning dish to regulate described tuning dish to the governor motion of the distance of harmonic oscillator.
3. resonant cavity according to claim 2 is characterized in that, described governor motion is connecting rod, and described connecting rod is fixedly connected on the described tuning dish and reaches outside the cavity.
4. resonant cavity according to claim 2 is characterized in that, described governor motion comprises rack and pinion, and described tooth bar is fixedly connected on the described tuning dish and stretches out outside the cavity, and described gear matches with described tooth bar.
5. resonant cavity according to claim 1 is characterized in that, described harmonic oscillator is the middle cylindrical structural that is provided with through hole.
6. resonant cavity according to claim 5 is characterized in that, the external diameter of described tuning dish is identical with described harmonic oscillator external diameter, and first through hole is identical with the diameter of second through hole.
7. resonant cavity according to claim 6 is characterized in that, the thickness of described tuning dish is less than the height of described harmonic oscillator.
8. resonant cavity according to claim 7 is characterized in that, described harmonic oscillator is positioned at described resonant cavity middle, and height is less than 1/2nd of resonant cavity.
9. resonant cavity according to claim 1 is characterized in that, the material of described tuning dish is metal.
10. resonant cavity according to claim 9 is characterized in that, the material of described tuning dish is silver, copper or gold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100517432A CN103296372A (en) | 2012-03-01 | 2012-03-01 | Resonance cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100517432A CN103296372A (en) | 2012-03-01 | 2012-03-01 | Resonance cavity |
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|---|---|
| CN103296372A true CN103296372A (en) | 2013-09-11 |
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| CN2012100517432A Pending CN103296372A (en) | 2012-03-01 | 2012-03-01 | Resonance cavity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107112616A (en) * | 2015-04-29 | 2017-08-29 | 华为技术有限公司 | A kind of dielectric filter |
| CN113346209A (en) * | 2021-05-10 | 2021-09-03 | 武汉凡谷电子技术股份有限公司 | Filter for realizing frequency modulation by gear transmission structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6600394B1 (en) * | 1999-09-24 | 2003-07-29 | Radio Frequency Systems, Inc. | Turnable, temperature stable dielectric loaded cavity resonator and filter |
| CN1941497A (en) * | 2005-09-27 | 2007-04-04 | M/A-Com公司 | Dielectric resonators with axial gaps and circuits with such dielectric resonators |
| CN102324602A (en) * | 2011-09-01 | 2012-01-18 | 武汉虹信通信技术有限责任公司 | Inductance coupling device for TE01delta mode dielectric resonator |
-
2012
- 2012-03-01 CN CN2012100517432A patent/CN103296372A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6600394B1 (en) * | 1999-09-24 | 2003-07-29 | Radio Frequency Systems, Inc. | Turnable, temperature stable dielectric loaded cavity resonator and filter |
| CN1941497A (en) * | 2005-09-27 | 2007-04-04 | M/A-Com公司 | Dielectric resonators with axial gaps and circuits with such dielectric resonators |
| CN102324602A (en) * | 2011-09-01 | 2012-01-18 | 武汉虹信通信技术有限责任公司 | Inductance coupling device for TE01delta mode dielectric resonator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107112616A (en) * | 2015-04-29 | 2017-08-29 | 华为技术有限公司 | A kind of dielectric filter |
| CN107112616B (en) * | 2015-04-29 | 2020-01-03 | 华为技术有限公司 | Dielectric filter |
| CN113346209A (en) * | 2021-05-10 | 2021-09-03 | 武汉凡谷电子技术股份有限公司 | Filter for realizing frequency modulation by gear transmission structure |
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Application publication date: 20130911 |
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| RJ01 | Rejection of invention patent application after publication |