CN104299886A - Microwave excitation device of electrodeless lamp - Google Patents
Microwave excitation device of electrodeless lamp Download PDFInfo
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- CN104299886A CN104299886A CN201410459838.7A CN201410459838A CN104299886A CN 104299886 A CN104299886 A CN 104299886A CN 201410459838 A CN201410459838 A CN 201410459838A CN 104299886 A CN104299886 A CN 104299886A
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- microwave
- dielectric resonator
- metallic cavity
- excitation device
- electrodeless lamp
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Electromagnetism (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a microwave excitation device of an electrodeless lamp. The microwave excitation device comprises an electrodeless lamp tube, a metal cavity, a dielectric resonator and a microwave inputting device. The metal cavity comprises a microwave inputting opening and a microwave outputting opening. The dielectric resonator is installed inside the metal cavity, microwave energy is fed into the metal cavity from the microwave inputting opening through the microwave inputting device so that the dielectric resonator can resonate, and one end of the electrodeless lamp tube extends into the metal cavity from the microwave outputting opening, makes contact with the dielectric resonator and is excited by microwaves output by the dielectric resonator to emit light. The microwave excitation device of the electrodeless lamp is compact in structure, can easily achieve good microwave inputting matching through adjusting coupling between the microwave inputting device and the dielectric resonator and is high in excitation efficiency, and working frequency is easier to control.
Description
[technical field]
The present invention relates to light sources of electrodeless lamps, particularly relate to a kind of Non-polarized lamp microwave excitation device.
[background technology]
Non-polarized lamp does not have built-in electrode, and discharge cavity can adopt that single material is airtight to be formed, thus substantially prolongs the life-span of Non-polarized lamp.Microwave electrodeless discharge lamp is microwave triggering coupled plasma electrodeless light source (Microwave trigger coupled plasma electrodeless light source) based on the work of microwave coupling discharge principle.
Microwave discharge is the microwave energy that the microwave sources such as magnetron are produced, and via the feed-in such as waveguide or coaxial line resonator, thus excites electrodeless discharge tube luminous.In microwave discharge process, electronics because of with ambient particles elastic collision and constantly change the direction of motion, from microwave electromagnetic field, obtain enough energy gradually and excite and ionized atom (molecule), producing electric discharge and luminous.Therefore, the electrodeless microwave excitation device be made up of microwave resonator is one of crucial exciting bank of microwave discharge electrodeless light source, directly determines the microwave-excitation efficiency of electrodeless light source, power, structure and life-span.
200420032780.x patent application describes the electrodeless microwave excitation device that a kind of tubaeform waveguide and metallic shield net are formed jointly, 200510027965.0 a number patent application describes a kind of quasi-molecule microwave electrodeless discharge lamp, No. 200810216783.1 patent describes a kind of electrodeless quasi-molecule lamp, and No. 201110151103.4 patent applications then describe a kind of electrodeless lamp tube exciter based on metallic cavity.The resonant cavity that the excitation of these Non-polarized lamps all adopts wire chamber or waveguide and metal screen net jointly to form is to encourage electrodeless lamp tube luminous.Its size is decided by the operating frequency encouraging microwave, and be limited to the frequency of microwave source, be often difficult to the miniaturization realizing exciting bank, its launching efficiency is lower.
201280032914.5 patent of invention discloses a kind of Lucent waveguide electromagnetic wave plasma light source, by carrying out alumina block loading to active antenna, effectively reduce the excitation volume of plasma source, but because microwave energy is directly coupled in plasma material seal by active antenna, coupling controls not easily, and exciting bank input port coupling is more difficult.On the other hand, because the relative dielectric constant of alumina material is often lower than 10, exciting bank microwave energy is concentrated not, thus reduces plasma source launching efficiency.
[summary of the invention]
The technical problem to be solved in the present invention is to provide a kind of compact conformation, Non-polarized lamp microwave excitation device that launching efficiency is high.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is, a kind of Non-polarized lamp microwave excitation device, comprises electrodeless lamp tube, metallic cavity, dielectric resonator and microwave input unit, and metallic cavity comprises microwave input port and microwave delivery outlet; Dielectric resonator is arranged in metallic cavity, and microwave energy from microwave input port feed-in metallic cavity, makes dielectric resonator resonance by microwave input unit; Metallic cavity is stretched into from microwave delivery outlet in one end of electrodeless lamp tube, contacts with dielectric resonator, and the microwave excitation exported by dielectric resonator is luminous.
Above-described Non-polarized lamp microwave excitation device, the endoporus of dielectric resonator annular housing is shoulder hole, and electrodeless lamp tube stretches into the macropore of one end insertion dielectric resonator shoulder hole of metallic cavity, and contacts with the bottom surface of shoulder hole macropore.
Above-described Non-polarized lamp microwave excitation device, the material of dielectric resonator is mica, pottery, rubber or polystyrene.
Above-described Non-polarized lamp microwave excitation device, dielectric resonator axial symmetry, top is frustum, and bottom is cylinder, and the bottom surface of frustum is connected with cylinder, and frustum height is 0.35-1:1 with the ratio of height of column; Frustum end face contacts with electrodeless lamp tube, and frustum end face diameter and electrodeless lamp tube diameter ratio are 1.05-1.3:1.
Above-described Non-polarized lamp microwave excitation device, comprises metab, and microwave exports and is positioned on the top board of metallic cavity, and the bottom surface of dielectric resonator and metab glued joint; Metab is fixed on the inwall of the base plate of metallic cavity.
Above-described Non-polarized lamp microwave excitation device, microwave input unit is waveguide or coaxial line; Coaxial line is arranged in metallic cavity by coaxial fitting, and coaxial fitting is arranged on the base plate of metallic cavity, and coaxial line is coaxial or biased with dielectric resonator; Waveguide is arranged in metallic cavity by waveguide connector, and the sidewall of metallic cavity comprises feed-in mouth, and waveguide connector is fixed on the outside of feed-in mouth.
Above-described Non-polarized lamp microwave excitation device, by reducing the direct-coupling between microwave input unit and electrodeless lamp tube, obtain the suitable stiffness of coupling of Non-polarized lamp exciting bank, good matching properties, microwave energy is coupled to dielectric resonator by microwave input unit, be coupled to electrodeless lamp tube by dielectric resonator again, adjusted the matching properties of microwave excitation device by the stiffness of coupling between adjustment microwave input unit and resonator.
Above-described Non-polarized lamp microwave excitation device, described dielectric resonator is used for energy storage and frequency-selecting, the microwave energy of resonance frequency is coupled by microwave input unit and is stored in dielectric resonator, and encouraging the electrodeless lamp tube contacted with dielectric resonator further, the microwave energy reflective of other frequencies returns microwave input unit; By selecting dielectric resonator material, shape, size and energisation mode, change the operating frequency of dielectric resonator.
Non-polarized lamp microwave excitation apparatus structure of the present invention is compact, by adjustment microwave input unit and being coupled between resonator, easily obtain good microwave Input matching, launching efficiency is high, and operating frequency controls to be more prone to.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the sectional structure chart of the embodiment of the present invention 1 Non-polarized lamp microwave excitation device.
Fig. 2 is the sectional structure chart of the embodiment of the present invention 2 Non-polarized lamp microwave excitation device.
Fig. 3 is the sectional structure chart of the embodiment of the present invention 3 Non-polarized lamp microwave excitation device.
Fig. 4 is the A direction view in Fig. 3.
[embodiment]
The structure of the embodiment of the present invention 1 Non-polarized lamp microwave excitation device as shown in Figure 1, comprises electrodeless lamp tube 1, metallic cavity 2, dielectric resonator 3, microwave input unit 4, metallic shield 5 and support 6.
Metallic cavity 2 is columnar metallic cavity, and base plate 201 has microwave input port, top board 202 has microwave delivery outlet 202a.
Dielectric resonator 3 be can resonance in the tangible media of operating frequency, form medium and then refer to all solid state microwave media, comprise mica, pottery, rubber, polystyrene etc., concrete shape depends on selected mode of resonance, and according to motivation needs to resonant entity perforate, some microwave input unit such as inner wire of coaxial port can be stretched in dielectric resonator, thus obtain the stiffness of coupling needed, or in dielectric resonator, open ladder endoporus, electrodeless lamp tube is made to stretch into dielectric resonator, and contact with ladder bottom surface, thus make electrodeless lamp tube obtain good excitation, the microwave feed-in hole of dielectric resonator can be communicated with the shoulder hole of electrodeless lamp tube.
Dielectric resonator 3 is arranged in metallic cavity 2, in the present embodiment, dielectric resonator 3 adopts electronic ceramic to make, and glueds joint in being provided with in the metab 7 installing screwed hole, metallic cavity is aluminum closed cavity, and is provided with the installation screw of coaxial fitting and dielectric resonator.Be provided with coaxial fitting inner wire in dielectric resonator 3 to stretch into hole 301 and stretch into hole 301a without lamp fluorescent tube.Hole 301 and hole 301a coaxially, form shoulder hole.
Dielectric resonator 3 glueds joint in metab 7, is fixed on the base plate 201 of metallic cavity 2 with coaxial fitting 4 screw or rivet 8.
The microwave input unit 4 of the present embodiment is coaxial fitting, the inner wire of coaxial fitting stretches into metallic cavity 2 from microwave input port, and stretching in the endoporus 301 of dielectric resonator 3, the microwave energy feed-in metallic cavity 2 provided by microwave source, makes dielectric resonator 3 resonance at the operating frequencies.Microwave input unit 4 also can adopt waveguide connector etc.
One end that the electrodeless lamp tube 1 being filled with gas medium stretches into metallic cavity 2 contacts with dielectric resonator, for obtaining better arousal effect, has hole 301a in dielectric resonator, the microwave excitation Discharge illuminating exported by dielectric resonator 3.
One end of metallic shield 5 is fixed in metallic cavity 2.The main part of electrodeless lamp tube 1 is arranged in metallic shield 5, fixes between electrodeless lamp tube 1 and metallic shield 5 with support 6.Cancellated metallic shield 5 can realize reliable microwave protection.
The structure of the embodiment of the present invention 2 Non-polarized lamp microwave excitation device as shown in Figure 2, as different from Example 1:
Dielectric resonator axial symmetry, upper end is frustum 301303, and lower end is cylinder 302, and the bottom surface of frustum 301303 is connected with cylinder, and frustum 301303 height is 0.35-1:1 with the ratio of cylinder 302 height; Frustum 301303 end face contacts with electrodeless lamp tube 1, and frustum 301303 end face diameter and electrodeless lamp tube diameter ratio are 1.05-1.3:1.
Electrodeless lamp tube 1 contacts with frustum 301303 upper bottom surface, thus makes electrodeless lamp tube obtain good excitation.
In the present embodiment, dielectric resonator 3 adopts electronic ceramic to make, glued joint in being provided with in the metab 7 installing screwed hole, metallic cavity is aluminum cavity, and the installation screwed hole extra-regional base plate being provided with coaxial fitting 4 and dielectric resonator metab 7 is gluedd joint at dielectric resonator, the screwed hole of metab 7 and coaxial fitting 4 is non-through hole, thus avoids screw to stretch into the power capacity reducing exciting bank.
Dielectric resonator 3 glueds joint in metab 7, and metab 7 screw 8 is fixed on the bottom surface of metallic cavity 2.Coaxial fitting 4 is biased relative to dielectric resonator 3.
The microwave input unit of the present embodiment is coaxial fitting 4, in coaxial fitting 4, coaxial inner conductor 401 stretches into metallic cavity 2 from microwave input port, form coaxial line and being coupled between dielectric resonator 3, direct-coupling amount between coaxial fitting and electrodeless lamp tube is relatively little, thus can by adjustment coaxial fitting inner wire length and and resonator between distance, the stiffness of coupling of resonator can be adjusted, obtain the matching properties that exciting bank is good.Thus guarantee that the microwave energy that microwave source provides is coupled to dielectric resonance 3 smoothly, make it resonance in operating frequency.
One end that the electrodeless lamp tube 1 being filled with gas medium stretches into metallic cavity 2 contacts with dielectric resonator frustum upper bottom surface, the microwave excitation Discharge illuminating exported by dielectric resonator 3, because dielectric resonator frustum upper bottom surface is bigger compared with electrodeless lamp tube cross section, the microwave energy that most resonator is exported participates in Non-polarized lamp excitation, thus obtains higher microwave excitation efficiency.
One end of metallic shield 5 is fixed in metallic cavity 2.The main part of electrodeless lamp tube 1 is arranged in metallic shield 5, fixes between electrodeless lamp tube 1 and metallic shield 5 with support 6.Cancellated metallic shield 5 can realize reliable microwave protection.
The above embodiment of the present invention adopts described dielectric resonator energy storage and frequency-selecting, selects suitable dielectric resonator material, shape, size and energisation mode, makes resonator resonance in operating frequency.The frustum structure of resonator can obtain better microwave concentration degree, improves the launching efficiency of Non-polarized lamp, greatly can reduce the volume and weight of exciting bank; On the other hand; the present embodiment, by reducing the direct-coupling between electrodeless lamp tube and microwave input unit, obtains controlled stiffness of coupling and good matching properties, makes resonator achieve energy storage, frequency-selecting and cushioning effect; while formation High Efficiency Luminescence, also protective effect is served to microwave source.
The structure of the embodiment of the present invention 3 Non-polarized lamp microwave excitation device as shown in Figure 3 and Figure 4, comprises electrodeless lamp tube 1, metallic cavity 2, dielectric resonator 3, microwave input unit 4, metallic shield 5 and support 6.With embodiment 1 and 2 unlike: microwave input unit adopts waveguide, in metallic cavity sidewall 203 upper shed, form waveguide pipe 204, external standard waveguide is by the waveguide connector 205 feed-in microwave energy outside coupling window, excitation resonator 3 resonance, and make electrodeless lamp tube 1 excitation luminescence that contacts with it, complete the function identical with 2 with embodiment 1.
Claims (8)
1. a Non-polarized lamp microwave excitation device, comprises electrodeless lamp tube and metallic cavity, it is characterized in that, comprises dielectric resonator and microwave input unit, and metallic cavity comprises microwave input port and microwave delivery outlet; Dielectric resonator is arranged in metallic cavity, and microwave energy from microwave input port feed-in metallic cavity, makes dielectric resonator resonance by microwave input unit; Metallic cavity is stretched into from microwave delivery outlet in one end of electrodeless lamp tube, contacts with dielectric resonator, and the microwave excitation exported by dielectric resonator is luminous.
2. Non-polarized lamp microwave excitation device according to claim 1, it is characterized in that, the endoporus of dielectric resonator annular housing is shoulder hole, and electrodeless lamp tube stretches into the macropore of one end insertion dielectric resonator shoulder hole of metallic cavity, and contacts with the bottom surface of shoulder hole macropore.
3. Non-polarized lamp microwave excitation device according to claim 1, is characterized in that, the material of dielectric resonator is mica, pottery, rubber or polystyrene.
4. Non-polarized lamp microwave excitation device according to claim 1, is characterized in that, dielectric resonator axial symmetry, and top is frustum, and bottom is cylinder, and the bottom surface of frustum is connected with cylinder, and frustum height is 0.35-1:1 with the ratio of height of column; Frustum end face contacts with electrodeless lamp tube, and frustum end face diameter and electrodeless lamp tube diameter ratio are 1.05-1.3:1.
5. Non-polarized lamp microwave excitation device according to claim 1, is characterized in that, comprise metab, and microwave exports and is positioned on the top board of metallic cavity, and the bottom surface of dielectric resonator and metab glued joint; Metab is fixed on the inwall of the base plate of metallic cavity.
6. Non-polarized lamp microwave excitation device according to claim 5, is characterized in that, microwave input unit is waveguide or coaxial line; Coaxial line is arranged in metallic cavity by coaxial fitting, and coaxial fitting is arranged on the base plate of metallic cavity, and coaxial line is coaxial or biased with dielectric resonator; Waveguide is arranged in metallic cavity by waveguide connector, and the sidewall of metallic cavity comprises feed-in mouth, and waveguide connector is fixed on the outside of feed-in mouth.
7. Non-polarized lamp microwave excitation device according to claim 1, it is characterized in that, by reducing the direct-coupling between microwave input unit and electrodeless lamp tube, obtain the suitable stiffness of coupling of Non-polarized lamp exciting bank, good matching properties, microwave energy is coupled to dielectric resonator by microwave input unit, be coupled to electrodeless lamp tube by dielectric resonator again, adjusted the matching properties of microwave excitation device by the stiffness of coupling between adjustment microwave input unit and resonator.
8. Non-polarized lamp microwave excitation device according to claim 1, it is characterized in that, described dielectric resonator is used for energy storage and frequency-selecting, the microwave energy of resonance frequency is coupled by microwave input unit and is stored in dielectric resonator, and encouraging the electrodeless lamp tube contacted with dielectric resonator further, the microwave energy reflective of other frequencies returns microwave input unit; By selecting dielectric resonator material, shape, size and energisation mode, change the operating frequency of dielectric resonator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459838.7A CN104299886B (en) | 2014-09-10 | A kind of Non-polarized lamp microwave excitation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459838.7A CN104299886B (en) | 2014-09-10 | A kind of Non-polarized lamp microwave excitation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104299886A true CN104299886A (en) | 2015-01-21 |
| CN104299886B CN104299886B (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112164900A (en) * | 2020-10-26 | 2021-01-01 | 北京邮电大学 | Plasma dielectric resonant antenna |
| CN113793792A (en) * | 2021-09-10 | 2021-12-14 | 成都市吉亨特科技有限公司 | Automatic excitation microwave gas discharge equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004088706A2 (en) * | 2003-04-01 | 2004-10-14 | The University Of Liverpool | Ultraviolet lamp |
| CN201084702Y (en) * | 2007-09-29 | 2008-07-09 | 刘荣淦 | A co-axial non-polar ultraviolet ray lamp |
| CN102306611A (en) * | 2011-06-07 | 2012-01-04 | 广东雪莱特光电科技股份有限公司 | Super high power electrodeless ultraviolet lamp |
| CN202454537U (en) * | 2012-03-16 | 2012-09-26 | 泰安紫波光电科技有限公司 | Microwave electrodeless light source |
| CN204118035U (en) * | 2014-09-10 | 2015-01-21 | 深圳市高斯宝电气技术有限公司 | Non-polarized lamp microwave excitation device |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004088706A2 (en) * | 2003-04-01 | 2004-10-14 | The University Of Liverpool | Ultraviolet lamp |
| CN201084702Y (en) * | 2007-09-29 | 2008-07-09 | 刘荣淦 | A co-axial non-polar ultraviolet ray lamp |
| CN102306611A (en) * | 2011-06-07 | 2012-01-04 | 广东雪莱特光电科技股份有限公司 | Super high power electrodeless ultraviolet lamp |
| CN202454537U (en) * | 2012-03-16 | 2012-09-26 | 泰安紫波光电科技有限公司 | Microwave electrodeless light source |
| CN204118035U (en) * | 2014-09-10 | 2015-01-21 | 深圳市高斯宝电气技术有限公司 | Non-polarized lamp microwave excitation device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112164900A (en) * | 2020-10-26 | 2021-01-01 | 北京邮电大学 | Plasma dielectric resonant antenna |
| CN112164900B (en) * | 2020-10-26 | 2021-09-28 | 北京邮电大学 | Plasma dielectric resonant antenna |
| CN113793792A (en) * | 2021-09-10 | 2021-12-14 | 成都市吉亨特科技有限公司 | Automatic excitation microwave gas discharge equipment |
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Granted publication date: 20170104 Termination date: 20200910 |