CN1300896C - Circular recess wave guide chamber stable oscillator - Google Patents
Circular recess wave guide chamber stable oscillator Download PDFInfo
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- CN1300896C CN1300896C CNB2004100647450A CN200410064745A CN1300896C CN 1300896 C CN1300896 C CN 1300896C CN B2004100647450 A CNB2004100647450 A CN B2004100647450A CN 200410064745 A CN200410064745 A CN 200410064745A CN 1300896 C CN1300896 C CN 1300896C
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- wave guide
- circular recess
- insulation strip
- recess wave
- pass filter
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Abstract
The present invention relates to a circular recess wave guide chamber type stable oscillator which is a circular recess wave guide chamber type stable oscillator that can be used for microwaves, millimeter waves and submillimeter waves. The circular recess wave guide chamber type stable oscillator adopts an upper insulating bar and a lower insulating bar which are respectively positioned on both sides between a front metal flat plate and a back metal flat plate to space the two metal flat plates. Wedge-shaped matched dry loads are respectively arranged on the inner sides of the upper insulating bar and the lower insulating bar. The symmetrical center of the end faces of the two metal flat plates is provided with a circular through hole along the length direction of the metal flat plates, the diameter of the through hole is D, and a circular groove waveguide is formed. A transistor base, a coaxial low pass filter and a tuning screw which are perpendicular to the circular through hole are arranged in the clearance between the two metal flat plates, the transistor base and the coaxial low pass filter are positioned on the same axial line, and the tuning screw and the coaxial low pass filter are in parallel. One end of the circular groove waveguide is provided with a high Q circular cylinder tunable cavity, the axial line of which is perpendicular to the circular through hole.
Description
Technical field
The present invention is a kind of circular recess wave guide chamber stable oscillator that is used for microwave, millimeter wave and submillimeter wave, belongs to the technical field that oscillator is made.
Background technology
In this frequency range, oscillator has two classes substantially from the microwave to the submillimeter wave: a class is by vacuum electron device and waveguide be combined into, and another kind of is solid state device and waveguide be combined into, the invention belongs to the latter.
Oscillator is the source that generates electromagnetic waves, so it is one of most important parts in microwave, millimeter wave and the submillimeter wave technology.Oscillator is the result that active device combines with waveguide, has a class waveguide that a kind of oscillator that adapts with such waveguide is just arranged.It is a class novel waveguide that slot wave is led, and it has size big, advantage such as power capacity height, loss are low, bandwidth, chromatic dispersion are little.Therefore it is significant that research and development are based upon the oscillator that slot wave leads on the basis.
Though abroad the someone proposed the rectangular channel wiveguide oscillator and led oscillator with " V " shape slot wave, the combination of these but so-called " oscillators " only are that the rectangular waveguide oscillator adds rectangular waveguide---combination or the rhombus wiveguide oscillator of rectangular channel waveguide mode converter add the rhombus waveguide---" V " shape slot wave guided mode formula converter, they only are rectangular waveguide oscillator or the rhombus waveguide devices that shakes, not being that truly slot wave is led oscillator, also not having a kind of slot wave truly to lead oscillator so far in the world---that is exactly directly installation solid state device and the oscillator that constitutes slot wave is led in.
Summary of the invention
Technical problem: the objective of the invention is deficiency, a kind of circular recess wave guide chamber stable oscillator is provided, make oscillator frequency stabilizing Du Genggao, require higher circular recess wave guide system of technical indicator or complete machine to meet the demands thereby make at prior art.Loading onto coupling iris can also be applied in technical requirement higher the rectangular waveguide system or complete machine.
Technical scheme; The present invention forms according to the circular recess wave guide chamber stable oscillator Design Theory.Be characterized in that circular recess wave guide adopts upper and lower insulation strip to separate two metal plates, wedge shape coupling is housed in the insulation strip inboard does load, the height of wedge is the integral multiple of electromagnetic wave work half-wavelength, has a manhole that is D along dull and stereotyped length direction diameter to constitute circular recess wave guide in the symmetrical centre of two metal plate end faces.Its concrete structure is: this circular recess wiveguide oscillator adopts and goes up insulation strip, insulation strip lays respectively at the both sides between preceding metal plate, two metal plates of back metal plate down, separate two metal plates, in last insulation strip, down the insulation strip inboard is respectively equipped with wedge shape coupling and does load, being provided with one in the symmetrical centre of two metal plate end faces is that the manhole of D constitutes circular recess wave guide along dull and stereotyped length direction and diameter; Be provided with in the space between two metal plates one with the perpendicular base of transistor and on-axis low pass filter and the tuning screw of manhole, the base of transistor and on-axis low pass filter are positioned on same the axis, and tuning screw parallels with the on-axis low pass filter; An end that is positioned at manhole at the base of transistor is provided with radial transmission line down, and the other end of the base of transistor is fixed on down on the insulation strip nut; An end that is positioned at manhole at the on-axis low pass filter is provided with radial transmission line, and the other end of on-axis low pass filter is fixed on the insulation strip nut; Transistor is located on the base of transistor and is descending between radial transmission line and the last radial transmission line; Tuning screw is fixed on the nut, and the tuning screw nut is fixed on the insulation strip; End face at circular recess wave guide is provided with high Q cylinder resonator, is provided with by short-circuit piece in high Q cylinder resonator, is provided with end cap at the port of high Q cylinder resonator, and short-circuit piece is connected by piston rod, and an end of piston rod passes end cap and stretches out outside the end cap.
The wedge height that wedge shape coupling is done load is the integral multiple of electromagnetic wave work half-wavelength.At the circular recess wave guide length direction is the direction of oscillator energy output.Short-circuit piece in the high Q cylinder resonator is made up of multi-disc, and the flat shape of short-circuit piece is circular.At an end face of circular recess wave guide is that the opposite of high Q cylinder resonator is provided with coupling iris, is provided with coupling aperture in the centre of coupling iris.Coupling aperture is circle or rectangle.
The energy of steady cavity oscillations device can be exported by coupling iris.
The operation principle and the course of work:
The operation principle of circular recess wave guide chamber stable oscillator and the course of work are divided the explanation of two parts: the one, and the operation principle of oscillator, the 2nd, the operation principle of frequency stabilization.
The operation principle of circular recess wiveguide oscillator can illustrate with equivalent electric circuit: transistorized admittance can be expressed as Y
l=G
l+ jB
l(Y wherein
lBe admittance, G
lFor electricity is led, jB
lBe susceptance), when voltage after low pass filter, radial transmission line are added on the transistor, negative conductance phenomenon, i.e. G can appear in transistor
l＜0, not only this show that it is not consumed energy that transistorized electricity is led, reverse side provides the source of energy, transistorized lead-in inductance and electric capacity constitute B
l, B
lSymbol with the size relevant with operating frequency.
Load admittance except transistor is expressed as Y
L=G
L+ jb
L(Y wherein
LBe load admittance, G
LBe load conductance, jB
LBe load susceptance, here G
LBe on the occasion of expression consumed energy, B
LSymbol also relevant with size with operating frequency.
When the admittance of transistorized admittance and external circuit met the following conditions, circular recess wiveguide oscillator reached stable oscillation stationary vibration
∑G＝G
l+G
L＝0
∑B＝B
l+B
L＝0
Load just obtains microwave, millimeter wave, submillimeter wave energy continually from transistor.
High Q stabilization frequency cavity realizes that the principle of oscillator stabilization is, the quality factor that improve oscillatory system have just improved frequency stability, and the quality factor of oscillatory system are directly proportional and are inversely proportional to loss of energy with the interior electromagnetic field energy storage of the interior oscillatory system of one-period.In order to improve the frequency stability of original oscillator, the resonant cavity of an external high quality factor, make the quality factor in this chamber be much higher than the quality factor that are stabilized the oscillator loop, thereby improve oscillatory system electromagnetic field energy storage in the one-period greatly, with these quality factor that improve oscillatory system, the frequency stability of oscillator is improved.
Beneficial effect: the present invention is based upon on the circular recess wave guide basis, and advantages such as the large scale of circular recess wave guide, high power capacity, low-loss, broadband produce directly effect to circular recess wave guide chamber stable oscillator, for example:
1, lacking millimeter, submillimeter region because the rectangular waveguide cross sectional dimensions is very little, and difficulty of processing is very big, cost is very high.Circular recess wave guide is at above-mentioned identical service band, and cross sectional dimensions increases a lot, and difficulty of processing reduces, and cost reduces.
2, in short millimeter, submillimeter region, the attenuation coefficient of rectangular waveguide is greatly to the degree that is difficult to accept, and the circular recess wave guide attenuation coefficient is littler one more than the order of magnitude than it, so the chamber stable oscillator loss made from circular recess wave guide is little, quality is high.
3, because the frequency stabilization effect of high Q resonant cavity makes the frequency stability of oscillator lead the oscillator height than typical circular slot wave, can satisfy the operating position of high request.
If 4 complete machines or measuring system are set up with circular recess wave guide, circular recess wave guide chamber stable oscillator can be directly connected on complete machine or the measuring system so,
We directly install solid state device and make circular recess wiveguide oscillator in circular recess wave guide, lead oscillator impetus is arranged developing other various slot waves.But, circular recess wiveguide oscillator still has some deficits in the high request occasion, bigger as frequency shift (FS), the frequency stability is relatively poor, and phase noise is poor, and this just influences its scope of application, we can improve the technical indicator that the typical circular slot wave is led oscillator with phase locking technology or high-q cavity stabilization technique, here realize that with the high-q cavity stabilization technique it has simple in structure, advantages such as low cost.
Better because of the frequency stability of circular recess wave guide chamber stable oscillator, can be used as the local oscillator in the communication system, to improving circular recess wave guide complete machine level, significant to the quality that improves the circular recess wave guide measuring system.
Description of drawings
Fig. 1 a is the structural representation of circular recess wave guide chamber stable oscillator of the present invention; Fig. 1 b is that A-A among Fig. 1 a is to the sectional structure schematic diagram; Fig. 1 c is the plan structure schematic diagram of Fig. 1 a.
Fig. 2 a is the structural representation that last wedge shape coupling is done load; Fig. 2 b is that A-A among Fig. 2 a is to the sectional structure schematic diagram; Fig. 2 c is the plan structure schematic diagram of Fig. 2 a.
Fig. 2 d is that wedge shape is mated the structural representation of doing load down; Fig. 2 e is that A-A among Fig. 2 d is to the sectional structure schematic diagram; Fig. 2 f is the plan structure schematic diagram of Fig. 2 e.
Fig. 3 is the insulation strip that is used for doing load.
Fig. 4 is the low pass filter exemplary plot.
Fig. 5 is the structural representation of circular port coupling iris 23.
Fig. 6 is the structural representation of rectangular opening coupling iris 23.
Have among the above figure:, go up insulation strip 1a, down insulation strip 1b, preceding metal plate 2, wedge shape coupling do load 3, bolt 4, back metal plate 5, the base of transistor 6, down insulation strip nut 7, down radial transmission line 8, transistor 9, go up radial transmission line 10, on-axis low pass filter 11, coaxial outer conductor 12, go up insulation strip nut 13, cable socket 14, insulating case 15, tuning screw 16, tuning screw hold-down nut 17, high Q cylinder resonator 18, short-circuit piece 19, piston rod 20, end cap 21, screw 22, coupling iris 23, coupling aperture 231, manhole 24.
Embodiment
The present invention realized by following several steps:
(1) circular recess wave guide
Get two metal plates that finished size is identical, dull and stereotyped length direction is a Z-direction, length is needed to decide by design, material can adopt copper, brass, good conductors such as alloy aluminum, dull and stereotyped relevant with the operation wavelength λ of the transmission λ with height H of width W is a free space wavelength, the edge bolt on metal plate two limits, on end face, the below, with the boundary line of two plane contact is that center line is along its length on (Z-direction), respectively mill an elongated slot down, place insulation strip and the dried load of wedge shape coupling in the groove, length is identical with circular recess wave guide, then in the end face symmetrical centre, along its length, through hole of boring, diameter D=0.62 λ～2.02 λ in hole are folded down bolt, the every side that metallic plate is porose, mill half that this slot wave is led two metal plate spacings.
It is to be used for absorbing the electromagnetic critical component that arrives the metal plate edge that wedge shape coupling is done load 3, it absorbs electromagnetic solid-state material with graphite or other and makes, the wedge height of wedge part is 0.5 λ～4 λ, metal plate 2 and back metal plate 5 before insulation strip is used to separate, wedge shape coupling is done the length of the length of load 3 and insulation strip with oscillator, and insulating material can be used bakelite, pottery etc.
Wedge shape coupling is done load 3, two metal plates after insulation strip and the above-mentioned processing of process fix with bolt 4 again, vertical through hole of boring passes insulation strip on following insulation strip then, be the diameter of the base of transistor, will go up the hole of the dried load of insulation strip and wedge shape coupling bottom then and expand insulation strip nut 13 external diameters to.The external diameter of coaxial outer conductor 12 is expanded in the hole of wedge part to, and the external diameter of insulation strip nut 7 is expanded down in the hole of descending insulation strip and wedge shape coupling to do the load bottom then to.
(2) transistorized assembling
Following radial transmission line 8 and stem 6 add can be processed into one man-hour, and for packaged transistor, there is internal thread at following radial transmission line center, screws in wherein for transistor 9.For the transistor chip that does not encapsulate, there is a pit at following radial transmission line center, the usefulness that supplies chip to put into.There is external screw thread can screw in the nut that is embedded in down on the insulation strip above the base of transistor.
Last radial transmission line 10 and low pass filter inner wire add also can be processed into one man-hour, and the other end of inner wire passes the cable socket 14 inner wire holes that are contained on the insulation strip, and fixes it.Low pass filter is to make outer conductor by metallic cylinder, and being connected in series by the cylinder of more piece different-diameter and thickness becomes inner wire.Separate with thin insulating barrier between low pass filter internal and external conductor partly, separate with insulating case between low pass filter coaxial line output internal and external conductor, as shown in Figure 4, insulating material such as polytetrafluoroethylene etc.The low pass filter size is decided by difference requirement optimal design.
Upper and lower radial transmission line measure-alike coils thick δ
1＜0.3 λ, upper and lower radial transmission line, the base of transistor and nut, low pass filter and nut are all made with good conductor such as brass etc.
(3) high Q resonant cavity
Circular recess wave guide outside end face is processed into smooth end face, on this end face, adorns high Q cylinder resonator 18, i.e. a frequency stabilization chamber.The axis of cylindrical cavity and manhole 24 axis normal, the symmetrical centre of cylindrical cavity sidewall coupling aperture overlaps with circular recess wave guide end face symmetrical centre.
The very little metal material of the high Q cylinder resonator 18 usefulness coefficients of expansion cuts down steel (Invar) fine finishining as the Yin Dynasty and forms.Its end is the closed metal face, and the other end is equipped with tunable short-circuit plunger.The diameter of short-circuit piece 19 is slightly less than the cylindrical cavity diameter and is advisable not touch, but the slot between the two should be as far as possible little.The thickness of short-circuit piece is quarter-wave, and piston rod 20 passes end cap 21 and links to each other with the spiral micrometer.
The diameter of cylindrical cavity is (1.7～1.95) λ, in distance cylindrical cavity Closed End distance 1/2nd chamber strong points, has the rectangle coupling aperture on the cylindrical cavity sidewall.
High Q cylinder resonator coupling aperture plane closely contacts with the circular recess wave guide end face, and the coupling aperture symmetrical centre overlaps with circular recess wave guide end face symmetrical centre, is screwed then.
(4) tuning screw
In circular recess wave guide, between the transistor AND gate high Q resonant cavity and with the position of transistor parallel axes on tuning screw 16 is housed.
(5) output window (coupling iris)
Under normal conditions, the energy that produces is along the direction output of circular recess wave guide manhole 24, but also can adorn a coupling iris apart from transistor component axis the right, the energy that produces is by the direction output of coupling iris to circular recess wave guide, coupling iris is made with good conductors such as brass, its symmetrical centre has coupling aperture, and the shape in hole can be circular, also can be rectangle.
(6) general assembly
Both sides before this circular recess wiveguide oscillator adopts and goes up insulation strip 1a, insulation strip 1b lays respectively at down between metal plate 2,5 two metal plates of back metal plate, separate two metal plates, at last insulation strip 1a, down insulation strip 1b inboard is respectively equipped with wedge shape coupling and does load 3, being provided with one in the symmetrical centre of two metal plate end faces is that the manhole 24 of D constitutes circular recess wave guides along dull and stereotyped length direction and diameter; Be provided with in the space between two metal plates one with the perpendicular base of transistor 6 and on-axis low pass filter 11 and the tuning screw 16 of manhole 24, the base of transistor 6 and on-axis low pass filter 11 are positioned on same the axis, and tuning screw 16 parallels with on-axis low pass filter 11; An end that is positioned at manhole 24 at the base of transistor 6 is provided with radial transmission line 8 down, and the other end of the base of transistor 6 is fixed on down on the insulation strip nut 7; An end that is positioned at manhole at on-axis low pass filter 11 is provided with radial transmission line 10, and the other end of on-axis low pass filter 11 is fixed on the insulation strip nut 13; Transistor 9 is located on the base of transistor 6 and is descending between radial transmission line 8 and the last radial transmission line 10; Tuning screw 16 is fixed on the tuning screw hold-down nut 17, and tuning screw hold-down nut 17 is fixed on the insulation strip 1a; End face at circular recess wave guide is provided with high Q cylinder resonator 18, in high Q cylinder resonator 18, be provided with by short-circuit piece 19, port at high Q cylinder resonator 18 is provided with end cap 21, and short-circuit piece 19 is connected by piston rod 20, and an end of piston rod 20 passes end cap 21 and stretches out outside the end cap 21.
Installation step
1. other part removes machine oil, clean with each.
2. wrapping insulating barrier on the filter of the low pass filter that the has radial transmission line inner wire partly, cover insulating case 15 is put into it coaxial outer conductor 12 carefully on the inner wire of output coaxial cable part.
3. embed on the last insulation strip insulation strip nut 13,, coaxial low-pass filter is screwed in wherein; On last insulation strip, embed tuning screw hold-down nut 17 then, tuning screw 16 is screwed in wherein.
4. insulation strip nut 7 under embedding on the following insulation strip screws in radial transmission line 8 down to transistor 9, and with insulation strip nut 7 under the base of transistor 6 screw-ins.
5. above each several part is fixed with bolt 4 by Fig. 1 mode and the promptly preceding metal plate 2 of two flat boards of circular recess wave guide, back metal plate 5, the dried load 3 of wedge shape coupling, insulation strip, must make the on-axis low pass filter this moment, go up radial transmission line, transistor, radial transmission line and the base of transistor are on same the axis down, and keep the electrical property contact good.
6. coaxial socket 14 is installed on last insulation strip, is made the low pass filter inner wire pass cable socket 14 inner wire holes, and fix it, its outer conductor and low pass filter outer conductor are joined.
7. high Q cylinder resonator is installed by Fig. 1, and it is contained in the end face of circular recess wave guide, the axis normal of the axis of cylindrical cavity and manhole 24, the symmetrical centre of cylindrical cavity sidewall coupling aperture overlaps with circular recess wave guide end face symmetrical centre.
8. in some cases, when directly being connected with rectangular waveguide system or complete machine as need, connect coupling iris 23 at the circular recess wave guide right-hand member, be provided with coupling aperture (231) in the centre of coupling iris (23), coupling aperture (231) is circle or rectangle.
Claims (6)
1, a kind of circular recess wave guide chamber stable oscillator, comprise insulation strip, following insulation strip, metal plate, wedge shape coupling is done load, it is characterized in that this circular recess wave guide chamber stable oscillator adopts upward insulation strip (1a), following insulation strip (1b) lays respectively at preceding metal plate (2), both sides between (5) two metal plates of back metal plate separate two metal plates, at last insulation strip (1a), following insulation strip (1b) inboard is respectively equipped with wedge shape coupling and does load (3), and being provided with one in the symmetrical centre of two metal plate end faces is that the manhole (24) of D constitutes circular recess wave guide along dull and stereotyped length direction and diameter; Be provided with in the space between two metal plates one with the perpendicular base of transistor (6) and on-axis low pass filter (11) and the tuning screw (16) of manhole (24), the base of transistor (6) and on-axis low pass filter (11) are positioned on same the axis, and tuning screw (16) parallels with on-axis low pass filter (11); An end that is positioned at manhole (24) at the base of transistor (6) is provided with radial transmission line (8) down, and the other end of the base of transistor (6) is fixed on down on the insulation strip nut (7); An end that is positioned at manhole (24) at on-axis low pass filter (11) is provided with radial transmission line (10), and the other end of on-axis low pass filter (11) is fixed on the insulation strip nut (13); Transistor (9) is located on the base of transistor (6) and is positioned between following radial transmission line (8) and the last radial transmission line (10); Tuning screw (16) is fixed on the tuning screw hold-down nut (17), and tuning screw hold-down nut (17) is fixed on the insulation strip (1a); End face at circular recess wave guide is provided with high Q cylinder resonator (18), in high Q cylinder resonator (18), be provided with short-circuit piece (19), port at high Q cylinder resonator (18) is provided with end cap (21), short-circuit piece (19) is connected by piston rod (20), and an end of piston rod (20) passes end cap (21) and stretches out outside the end cap (21).
2, circular recess wave guide chamber stable oscillator according to claim 1 is characterized in that it is electromagnetic 0.5 λ～4 λ that wedge shape coupling is done the wedge height of load (3).
3, circular recess wave guide chamber stable oscillator according to claim 1 is characterized in that at the circular recess wave guide length direction it being the direction of oscillator energy output.
4, circular recess wave guide chamber stable oscillator according to claim 1 is characterized in that the short-circuit piece (19) in the high Q cylinder resonator (18) is made up of multi-disc, and the flat shape of short-circuit piece (19) is circular.
5, circular recess wave guide chamber stable oscillator according to claim 1 is characterized in that a end face at circular recess wave guide is that the opposite of high Q cylinder resonator (18) is provided with coupling iris (23), is provided with coupling aperture (231) in the centre of coupling iris (23).
6, circular recess wave guide chamber stable oscillator according to claim 5 is characterized in that coupling aperture (231) is circle or rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100647450A CN1300896C (en) | 2004-09-27 | 2004-09-27 | Circular recess wave guide chamber stable oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100647450A CN1300896C (en) | 2004-09-27 | 2004-09-27 | Circular recess wave guide chamber stable oscillator |
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| CN1588690A CN1588690A (en) | 2005-03-02 |
| CN1300896C true CN1300896C (en) | 2007-02-14 |
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|---|---|---|---|
| CNB2004100647450A Expired - Fee Related CN1300896C (en) | 2004-09-27 | 2004-09-27 | Circular recess wave guide chamber stable oscillator |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352793C (en) | 2006-01-20 | 2007-12-05 | 杨鸿生 | Groove waveguide microwave chemical reaction equipment for ethene preparation by natural gas and preparation method thereof |
| CN103928740A (en) * | 2014-04-24 | 2014-07-16 | 中国工程物理研究院应用电子学研究所 | High-power wide-spectrum quarter-wave switching oscillator |
| EP3145022A1 (en) * | 2015-09-15 | 2017-03-22 | Spinner GmbH | Microwave rf filter with dielectric resonator |
| CN109743021A (en) * | 2018-12-19 | 2019-05-10 | 安徽华东光电技术研究所有限公司 | A kind of solid-state electronic oscillator based on quasi-optical technique |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2126658Y (en) * | 1992-06-29 | 1993-01-27 | 东南大学 | High-performance circular slot waveguide |
| CN1487623A (en) * | 2003-09-04 | 2004-04-07 | 东南大学 | High-power circular slot waveguide |
| CN2733617Y (en) * | 2004-09-27 | 2005-10-12 | 东南大学 | Circular-slot wave-guide cavity-stabilized oscillator |
-
2004
- 2004-09-27 CN CNB2004100647450A patent/CN1300896C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2126658Y (en) * | 1992-06-29 | 1993-01-27 | 东南大学 | High-performance circular slot waveguide |
| CN1487623A (en) * | 2003-09-04 | 2004-04-07 | 东南大学 | High-power circular slot waveguide |
| CN2733617Y (en) * | 2004-09-27 | 2005-10-12 | 东南大学 | Circular-slot wave-guide cavity-stabilized oscillator |
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| CN1588690A (en) | 2005-03-02 |
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