CN104241082B - Microwave cylindrical coaxial cavity resonator plasma lamp - Google Patents

Microwave cylindrical coaxial cavity resonator plasma lamp Download PDF

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Publication number
CN104241082B
CN104241082B CN201410478287.9A CN201410478287A CN104241082B CN 104241082 B CN104241082 B CN 104241082B CN 201410478287 A CN201410478287 A CN 201410478287A CN 104241082 B CN104241082 B CN 104241082B
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outer conductor
resonator cavity
ceramic ring
cavity outer
resonator
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CN104241082A (en
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贾华
朱梁
彭承尧
单家芳
刘甫坤
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Hefei Institutes of Physical Science of CAS
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Abstract

The invention discloses a kind of microwave cylindrical coaxial cavity resonator plasma lamp, include rosette base, resonator cavity outer conductor, circular metal shrouding disc, resonator cavity outer conductor is arranged on rosette base, circular metal shrouding disc covers at resonator cavity outer conductor top, in resonator cavity outer conductor, inner wire is set, resonator cavity outer conductor sidepiece is inserted with coaxial type probe, and coaxial type probe inserts on inner wire, and electrodeless cylindrical bulb is installed at inner wire top.Present invention could apply to the resonator cavity of various microwave excited plasma lamp, it is achieved the gathering to microwave energy, produce higher electric field intensity, so that bulb gas ionization, form the plasma source of high brightness.

Description

Microwave cylindrical coaxial cavity resonator plasma lamp
Technical field
The present invention relates to plasma light source domain, specifically a kind of microwave cylindrical coaxial cavity resonator plasma lamp.
Background technology
At present, the filament used in normal lighting light source or metal electrode, significantly limit the life-span of light source.Because lamp The evaporation of bubble electrode can cause bigger optical attenuation, and the sealing of electrode and glass works long hours and is easy to gas leakage, reduces Life-span of luminous flux and light source.
Microwave excited plasma light fixture has electrodeless, life-span length, bad light, energy-conserving and environment-protective, light efficiency advantages of higher, has It is widely applied prospect.In microwave plasma lamp, in excitation probe transmitting microwave energy to resonator cavity, and on resonator cavity surface Bulb at form stronger electric field intensity, excite gas ionization and electric discharge in bulb, produce highlighted light source.At present, existing Microwave plasma lamp technology mainly uses ceramic resonance chamber, and wherein ceramic segment volume is relatively big, and structure is complicated, sintering difficulty, And need ceramic surface metallization, complex process.The more important thing is, owing to ceramic material exists dielectric loss, cause substantial amounts of Microwave power is absorbed by pottery in resonator cavity, not only produces substantial amounts of thermally-induced cavity temperature and raises, and reduces bulb The energy absorbed and the luminous efficiency of plasma lamp.
Summary of the invention it is an object of the invention to provide a kind of microwave cylindrical coaxial cavity resonator plasma lamp, to solve prior art pottery Porcelain cavity resonator structure complex process and the bigger problem of dielectric loss.
In order to achieve the above object, the technical solution adopted in the present invention is:
Microwave cylindrical coaxial cavity resonator plasma lamp, it is characterised in that: include rosette base, resonator cavity outer conductor, circle Metal shrouding disc, described resonator cavity outer conductor is the hollow cylindrical configuration that conductive metallic material is made, and resonator cavity outer conductor coaxially sets Put on rosette base, rosette base tube port position bottom resonator cavity outer conductor close resonator cavity outer conductor, institute State circular metal shrouding disc and cover at resonator cavity outer conductor top tube port position, by circular metal shrouding disc at resonator cavity outer conductor top cylinder Closing resonator cavity outer conductor at Kou, be coaxially arranged with inner wire in resonator cavity outer conductor, inner wire bottom is closely vertically connected on On rosette base, constitute the short-circuit attachment structure between inner wire and resonator cavity outer conductor, institute by rosette base State circular metal shrouding disc center and have through hole, and inner wire top is stretched in circular metal shrouding disc central through hole, described inner wire Top is provided with hemispherical groove, is provided with electrodeless cylindrical bulb in hemispherical groove, and electrodeless cylindrical bulb from Circular metal shrouding disc exposes, and also includes round ceramic ring, and round ceramic ring is by the bigger hypomere of the less epimere of external diameter and external diameter Constitute, and round ceramic ring epimere external diameter and circular metal shrouding disc central through hole diameter matches, it is provided with vertical in round ceramic ring Cavity, cavity diameter mates with inner conductor outer diameter, and cavity top is set to reducing at round ceramic top surface of ring, the bore of reducing Mating with electrodeless cylindrical bulb external diameter, the height of the hypomere of round ceramic ring is much smaller than the height of resonator cavity outer conductor cavity Degree, round ceramic ring hypomere side has the blind hole of non-through round ceramic ring, and described round ceramic ring is assemblied in by cavity Inner wire top, round ceramic ring epimere stretches in circular metal shrouding disc central through hole and exposes circular metal shrouding disc center and leads to Hole, and round ceramic top surface of ring reducing is enclosed within electrodeless cylindrical bulb, the described resonator cavity outer conductor upper side side of being provided with Shape plane, has coupling throughhole in the middle of square planar, square planar is provided with flange, has same with coupling throughhole in the middle of flange The round tube hole of axle connection, is inserted with coaxial type probe, and coaxial type probe stretches into resonator cavity outer conductor in described flange round tube hole In and insert in the blind hole of round ceramic ring side.
Described microwave cylindrical coaxial cavity resonator plasma lamp, it is characterised in that: described rosette base, resonator cavity outer conductor material Matter selects high conductivity metal material, can be selected for aluminum, or aluminium alloy, or copper, wherein preferred aluminium alloy.
Described microwave cylindrical coaxial cavity resonator plasma lamp, it is characterised in that: described inner wire can be solid construction, or is Hollow structure, or the hollow structure of high thermal conductivity material it is filled with for inside.
Described microwave cylindrical coaxial cavity resonator plasma lamp, it is characterised in that: described round ceramic ring selects high heat conductance insulation Material, can be selected for aluminium oxide, or beryllium oxide, or zirconium oxide, wherein preferential oxidation aluminum.
Described microwave cylindrical coaxial cavity resonator plasma lamp, it is characterised in that: the described electrodeless upper and lower two ends of column type bulb are Hemispherical hollow structure, centre is cylindrical hollow configuration, and electrodeless column type bulb bubble wall uses quartz glass or pottery Material, inside comprises argon and metal halide element, or comprises mercury element.
Described microwave cylindrical coaxial cavity resonator plasma lamp, it is characterised in that: described round ceramic ring is by the less epimere of external diameter The hypomere bigger with external diameter is constituted, and round ceramic ring hypomere external diameter mates with resonator cavity outer conductor intracavity diameter, or less than humorous Shake chamber outer conductor intracavity diameter, and round ceramic ring hypomere height mates with resonator cavity outer conductor cavity heights, on round ceramic ring Section external diameter and circular metal shrouding disc central through hole diameter matches, round ceramic ring epimere height and circular metal shrouding disc central through hole Matched, is provided with vertical cavity in round ceramic ring, cavity diameter mates with inner conductor outer diameter, round ceramic ring upper side Face has the blind hole of non-through round ceramic ring, and described round ceramic ring is set with in the conductor by its cavity, round ceramic The bottom surface of ring hypomere contacts with rosette base, and annular ceramic ring epimere stretches in circular metal shrouding disc central through hole also Filling up circular metal shrouding disc central through hole, described coaxial type probe is direct after passing resonator cavity outer conductor upper side coupling throughhole Insert in the blind hole of round ceramic ring side.
Benefit of the invention is that, Multi-beam klystron plasma source can greatly reduce the consumption of pottery, Without ceramic metallization, technique is simple, alleviates the weight of plasma lamp.It is additionally, since chamber in-vivo medium and is mainly air, Substantially reduce the dielectric loss of cavity, be conducive to improving the luminous efficiency of plasma lamp.Meanwhile, as improvement, cavity medium Ceramic material can also be used, thus strengthen heat radiation and the job stability of plasma lamp, compared to the prior art, also simultaneously Volume can be reduced and reduce weight, thus there is bigger motility.
Present invention could apply to the resonator cavity of various microwave excited plasma lamp, it is achieved the gathering to microwave energy, Produce higher electric field intensity, so that bulb gas ionization, form the plasma source of high brightness.
Accompanying drawing explanation
Fig. 1 is Multi-beam klystron plasma source appearance schematic diagram of the present invention.
Fig. 2 is Multi-beam klystron plasma source profile front view of the present invention.
Fig. 3 is the cut-away view of first embodiment of coaxial cavity plasma source of the present invention.
Fig. 4 is the structure chart of round ceramic ring in first embodiment of the invention.
Fig. 5 is the cut-away view of second embodiment of coaxial cavity plasma source of the present invention.
Fig. 6 is the structure chart of round ceramic ring in second embodiment of the invention.
Detailed description of the invention
As Figure 1-Figure 4.Microwave cylindrical coaxial cavity resonator plasma lamp, include rosette base 2, resonator cavity outer conductor 1, Circular metal shrouding disc 5, the hollow cylindrical configuration that resonator cavity outer conductor 1 is made for conductive metallic material, resonator cavity outer conductor 1 is coaxial It is arranged on rosette base 2, rosette base 2 leads outside tube port position closing resonator cavity bottom resonator cavity outer conductor 1 Body 1, circular metal shrouding disc 5 covers at resonator cavity outer conductor 1 top tube port position, by circular metal shrouding disc 5 at resonator cavity outer conductor 1 Top tube port position closes resonator cavity outer conductor 1, is coaxially arranged with inner wire 8 in resonator cavity outer conductor 1, and inner wire 8 bottom is tight Be vertically connected on rosette base 2, by rosette base 2 constitute between inner wire 8 and resonator cavity outer conductor 1 short Road attachment structure, circular metal shrouding disc 5 center has through hole, and circular metal shrouding disc 5 central through hole is stretched on inner wire 8 top In, inner wire 8 top is provided with hemispherical groove, is provided with electrodeless cylindrical bulb 6, and electrodeless circle in hemispherical groove Cylindricality bulb 6 exposes from circular metal shrouding disc 5, also includes round ceramic ring 7, round ceramic ring 7 by the less epimere of external diameter and The bigger hypomere of external diameter is constituted, and round ceramic ring 7 epimere external diameter and circular metal shrouding disc 5 central through hole diameter matches, circular Being provided with vertical cavity in ceramic ring 7, cavity diameter mates with inner wire 8 external diameter, and cavity top sets at round ceramic ring 7 end face Being set to reducing, the bore of reducing mates with electrodeless cylindrical bulb 6 external diameter, and the height of round ceramic ring 7 hypomere is much smaller than humorous Shake the height of chamber outer conductor cavity, and round ceramic ring 7 hypomere side has the blind hole of non-through round ceramic ring 7, round ceramic Ring 7 is assemblied in inner wire 8 top by cavity, and round ceramic ring 7 epimere stretches in circular metal shrouding disc 5 central through hole and exposes Circular metal shrouding disc 5 central through hole, and round ceramic ring 7 end face reducing is enclosed within electrodeless cylindrical bulb 6, leads outside resonator cavity Body 1 upper side is provided with square planar, has coupling throughhole in the middle of square planar, and square planar is provided with flange 3, flange 3 Centre has and the round tube hole of coupling throughhole coaxial communication, is inserted with coaxial type probe 4 in flange 3 round tube hole, and coaxial type is visited In pin 4 stretches into resonator cavity outer conductor 1 and insert in the blind hole of round ceramic ring 7 side.
Rosette base 2, resonator cavity outer conductor 1 material selection high conductivity metal material, can be selected for aluminum, or aluminum closes Gold, or copper, wherein preferred aluminium alloy.
Inner wire 8 can be solid construction, or is hollow structure, or is filled with the hollow of high thermal conductivity material for inside Structure.
Round ceramic ring 7 selects high heat conductance insulant, can be selected for aluminium oxide, or beryllium oxide, or zirconium oxide, its Middle preferential oxidation aluminum.
Electrodeless column type bulb about 6 two ends are hemispherical hollow structure, and centre is cylindrical hollow configuration, electrodeless Column type bulb 6 steeps wall and uses quartz glass or ceramic material, and inside comprises argon and metal halide element, or bag Containing mercury element.
As shown in Figure 5, Figure 6.Round ceramic ring 7 is made up of the hypomere that the less epimere of external diameter and external diameter are bigger, circular pottery Porcelain ring 7 hypomere external diameter mates with resonator cavity outer conductor 1 intracavity diameter, or less than resonator cavity outer conductor 1 intracavity diameter, circular pottery Porcelain ring 7 hypomere height mates with resonator cavity outer conductor 1 cavity heights, in round ceramic ring 7 epimere external diameter and circular metal shrouding disc 5 Heart through-hole diameter mates, round ceramic ring 7 epimere height and circular metal shrouding disc 5 central through hole matched, round ceramic ring 7 Inside being provided with vertical cavity, cavity diameter mates with inner wire 8 external diameter, and round ceramic ring 7 upper side has non-through circle The blind hole of ceramic ring 7, round ceramic ring 7 is sleeved on inner wire 8 by its cavity, the bottom surface of round ceramic ring hypomere and metal Disc base 2 contacts, and annular ceramic ring 7 epimere stretches in circular metal shrouding disc 5 central through hole and fills up circular metal lid Dish 5 central through hole, coaxial type probe 4 is inserted directly into round ceramic ring 7 after resonator cavity outer conductor 1 upper side coupling throughhole In the blind hole of side.
The present invention provides a kind of Multi-beam klystron for plasma source, simple in construction, reduces cavity Dielectric loss, can be effectively improved the luminous efficiency of plasma lamp.Its microwave operational frequencies of the present invention can be 100MHz-3GHz Between optional frequency scope, the microwave power of injection is between 50W to 1500W.
The contour structures of the coaxial resonant cavity plasma source of the embodiment of the present invention is as it is shown in figure 1, wherein circular metal Realize short circuit by rosette base 2 with inner wire bottom coaxial resonant cavity outer conductor 1 be connected and close.Microwave energy passes through The probe of outer conductor side is coupled into resonator cavity.The top half of resonator cavity outer conductor 1 has a square planar, and plane is opened coupling Closing hole, flat outer is connected by screw flange 3, has circular hole in the middle of flange.Inserted by this flange circular hole and outer conductor coupling aperture Entering coaxial type probe 4, coaxial type probe 4 inserts intra resonant cavity.Circular metal shrouding disc 5 is had on resonator cavity outer conductor 1 top, logical Cross screw to realize being connected with resonator cavity outer conductor 1, in the middle of circular metal shrouding disc 5, have a circular hole, electrodeless cylindrical bulb 6 and circle The upper part of shape ceramic ring 7 exposes circular metal shrouding disc 5 through this circular hole.Fig. 2 is outside coaxial cavity plasma lamp of the present invention Shape front view.
The first embodiment of the present invention, resonator cavity mainly uses air dielectric, to reach extremely low conductor losses, meanwhile, When using a small amount of ceramic material to make microwave excited plasma luminescence, bulb realizes good heat radiation.As it is shown on figure 3, round metal Seat 2 of trying to get to the heart of a matter realizes good being conductively connected with resonator cavity outer conductor 1 by helicitic texture, and inner wire 8 hangs down with rosette base 2 Direct join compact siro spinning technology.Wherein, inner wire can be solid construction, it is also possible to for hollow structure, or internal to fill pottery contour Heat-conductivity materials.One square planar is arranged at resonator cavity outer conductor 1 top, opens coupling aperture in the middle of plane, and flat outer is by screw even Acting flange 3, has circular hole in the middle of flange.Coaxial type probe 4 is inserted by this flange circular hole and outer conductor coupling aperture.On inner wire top End, has a hemispheric groove, puts into electrodeless cylindrical bulb 6 in groove, and electrodeless cylindrical bulb 6 is recessed with inner wire Groove is connected by the bonding fixing compact that realizes.
Around the top of inner wire, having round ceramic ring 7, as shown in Figure 4, round ceramic ring 7 epimere outer diameter D 1 is less, Reducing interior diameter d1 is identical with electrodeless cylindrical bulb 6 external diameter;Hypomere overall diameter D2 is relatively big, more than top outer diameter D 1, cavity Diameter d2 is identical with inner wire diameter, and the height of hypomere is much smaller than the height of resonator cavity outer conductor cavity.During installation, round ceramic Ring 7 hypomere internal diameter is inserted directly into inner wire top, and the epimere of round ceramic ring 7 is immediately around at electrodeless cylindrical bulb 6 end Around portion.Round ceramic ring 7 can use aluminium oxide, beryllium oxide, zirconium oxide or other ceramic material sintering or processing and Become, preferentially select alumina material, it is possible to select other high heat conductance insulant.On the side of round ceramic ring 7 bottom Having a blind hole, during assembling, the inner wire of coaxial type probe 4 inserts intra resonant cavity, and front end puts in round ceramic ring 7 side In blind hole, and keep certain distance with resonator cavity inner wire 8.
There is circular metal shrouding disc 5 on coaxial cavity top, realize being connected with coaxial cavity outer conductor by screw, circular metal lid A circular hole, the upper part of electrodeless cylindrical bulb 6 and inner circular ceramic ring 7 is had to expose circle through this circular hole in the middle of dish 5 Metal shrouding disc 5.
As above electrodeless column type bulb 6, two ends are hemispherical hollow structure, and centre is cylindrical hollow configuration, bubble Wall uses quartz glass or ceramic material to make, and inside comprises argon and metal halide element, it is also possible to comprise hydrargyrum unit Element is so that the startup of lamp.
The second embodiment of the present invention, intra resonant cavity mainly uses ceramic material as medium, utilizes ceramic material high The feature of thermal conductivity, such that it is able to strengthen the heat-sinking capability of plasma lamp, reduces operating temperature when bulb runs continuously, from And improve system stability, further, it is also possible to be greatly reduced the size of whole resonator cavity, reduce the volume of whole plasma lamp And weight.This intra resonant cavity structure as it is shown in figure 5, and the difference of the first embodiment be the structure of inner circular ceramic ring Difference, especially length are longer.Such as Fig. 5, in the present embodiment, round ceramic ring is cylindrical ceramic ring, and hypomere height is longer, with Resonator cavity outer conductor 1 cavity heights is identical, and the bottom surface of ceramic ring hypomere contacts with rosette base 2.Round ceramic ring is tied As shown in Figure 6, ceramic ring top outer diameter D 1 is much smaller than lower height h2, ceramic ring less than lower outer diameter D2, upper height h1 to structure Inner hollow, interior diameter d is identical with resonator cavity inner conductor outer diameter, and ceramic ring lower height h2 is high with resonator cavity outer conductor 1 inner chamber Spending identical and mate, ceramic ring lower outer diameter D2 is less than or equal to the intracavity diameter of outer conductor 1.Ceramic ring side has one blind Hole, coaxial type probe is directly in this blind hole of ceramic ring by the circular hole of flange hole and outer conductor side.
During use, microwave energy feed-in at the probe of side, through frequency-selecting and the energy storage of resonator cavity, microwave energy is at bulb Place assembles, and forms higher electric field intensity, can puncture gas ionization generation plasma in bulb, due to bulb major part outside Dew, thus the light that plasma resonance produces just can be as the light source of high brightness.
According to the method and structure of the present invention, devise two Coaxial resonators as demonstration.Use first enforcement The structure of example, devises the air resonance chamber that resonant frequency is 440MHz, test result is consistent with Theoretical Calculation, it was demonstrated that this Bright technical feasibility.Additionally, use the structure of second embodiment, devise an aluminium oxide ceramics dielectric resonant chamber, Resonant frequency is 230MHz, and length is only 85mm, substantially reduces size and the weight of cavity.

Claims (6)

1. microwave cylindrical coaxial cavity resonator plasma lamp, it is characterised in that: include rosette base, resonator cavity outer conductor, circular gold Belonging to shrouding disc, described resonator cavity outer conductor is the hollow cylindrical configuration that conductive metallic material is made, and resonator cavity outer conductor is coaxially disposed On rosette base, rosette base tube port position bottom resonator cavity outer conductor close resonator cavity outer conductor, described Circular metal shrouding disc covers at resonator cavity outer conductor top tube port position, by circular metal shrouding disc at resonator cavity outer conductor top nozzle Place closes resonator cavity outer conductor, is coaxially arranged with inner wire in resonator cavity outer conductor, and inner wire bottom is closely vertically connected on gold Belong on disc base, constitute the short-circuit attachment structure between inner wire and resonator cavity outer conductor by rosette base, described Circular metal shrouding disc center has through hole, and inner wire top is stretched in circular metal shrouding disc central through hole, described inner wire top End is provided with hemispherical groove, is provided with electrodeless cylindrical bulb, and electrodeless cylindrical bulb is from circle in hemispherical groove Shape metal shrouding disc exposes, and also includes round ceramic ring, and round ceramic ring is by the bigger hypomere structure of the less epimere of external diameter and external diameter Become, and round ceramic ring epimere external diameter and circular metal shrouding disc central through hole diameter matches, it is provided with vertical in round ceramic ring Cavity, cavity diameter mates with inner conductor outer diameter, and cavity top is set to reducing at round ceramic top surface of ring, the bore of reducing with Electrodeless cylindrical bulb external diameter coupling, round ceramic ring hypomere side has the blind hole of non-through round ceramic ring, described circle Shape ceramic ring is assemblied in inner wire top by cavity, and round ceramic ring epimere stretches in circular metal shrouding disc central through hole and reveals Go out circular metal shrouding disc central through hole, and round ceramic top surface of ring reducing is enclosed within electrodeless cylindrical bulb, described resonator cavity Outer conductor upper side is provided with square planar, has coupling throughhole in the middle of square planar, and square planar is provided with flange, flange Centre has and the round tube hole of coupling throughhole coaxial communication, is inserted with coaxial type probe, and coaxial type in described flange round tube hole Probe stretches in resonator cavity outer conductor and inserts in the blind hole of round ceramic ring side.
Microwave cylindrical coaxial cavity resonator plasma lamp the most according to claim 1, it is characterised in that: described rosette base, humorous Shake chamber outer conductor material selection high conductivity metal material, aluminium, or aluminium alloy, or copper.
Microwave cylindrical coaxial cavity resonator plasma lamp the most according to claim 1, it is characterised in that: described inner wire can be solid knot Structure, or be hollow structure, or the hollow structure of high thermal conductivity material it is filled with for inside.
Microwave cylindrical coaxial cavity resonator plasma lamp the most according to claim 1, it is characterised in that: described round ceramic ring selects height Thermal conductivity insulant, selects aluminium oxide, or beryllium oxide, or zirconium oxide.
Microwave cylindrical coaxial cavity resonator plasma lamp the most according to claim 1, it is characterised in that: described electrodeless column type bulb Two ends are hemispherical hollow structure up and down, and centre is cylindrical hollow configuration, and electrodeless column type bulb bubble wall uses quartz glass Glass or ceramic material, inside comprises argon and metal halide element, or comprises mercury element.
6. microwave cylindrical coaxial cavity resonator plasma lamp, it is characterised in that: include rosette base, resonator cavity outer conductor, circular gold Belonging to shrouding disc, described resonator cavity outer conductor is the hollow cylindrical configuration that conductive metallic material is made, and resonator cavity outer conductor is coaxially disposed On rosette base, rosette base tube port position bottom resonator cavity outer conductor close resonator cavity outer conductor, described Circular metal shrouding disc covers at resonator cavity outer conductor top tube port position, by circular metal shrouding disc at resonator cavity outer conductor top nozzle Place closes resonator cavity outer conductor, is coaxially arranged with inner wire in resonator cavity outer conductor, and inner wire bottom is closely vertically connected on gold Belong on disc base, constitute the short-circuit attachment structure between inner wire and resonator cavity outer conductor by rosette base, described Circular metal shrouding disc center has through hole, and inner wire top is stretched in circular metal shrouding disc central through hole, described inner wire top End is provided with hemispherical groove, is provided with electrodeless cylindrical bulb, and electrodeless cylindrical bulb is from circle in hemispherical groove Shape metal shrouding disc exposes, and also includes round ceramic ring, described round ceramic ring by the less epimere of external diameter and external diameter bigger under Section is constituted, and round ceramic ring hypomere external diameter mates with resonator cavity outer conductor intracavity diameter, or less than resonator cavity outer conductor inner chamber Diameter, round ceramic ring hypomere height mates with resonator cavity outer conductor cavity heights, round ceramic ring epimere external diameter and circle gold Belong to shrouding disc central through hole diameter matches, round ceramic ring epimere height and circular metal shrouding disc central through hole matched, circular Being provided with vertical cavity in ceramic ring, cavity diameter mates with inner conductor outer diameter, and round ceramic ring upper side has non-through The blind hole of round ceramic ring, described round ceramic ring is set with in the conductor by its cavity, the bottom surface of round ceramic ring hypomere Contacting with rosette base, annular ceramic ring epimere stretches in circular metal shrouding disc central through hole and fills up circular metal Shrouding disc central through hole, described coaxial type probe is inserted directly into round ceramic after resonator cavity outer conductor upper side coupling throughhole In the blind hole of ring side.
CN201410478287.9A 2014-09-18 2014-09-18 Microwave cylindrical coaxial cavity resonator plasma lamp Expired - Fee Related CN104241082B (en)

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