CN201285792Y - Temperature compensation mechanism for resonator cavity - Google Patents
Temperature compensation mechanism for resonator cavity Download PDFInfo
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- CN201285792Y CN201285792Y CNU2008201235485U CN200820123548U CN201285792Y CN 201285792 Y CN201285792 Y CN 201285792Y CN U2008201235485 U CNU2008201235485 U CN U2008201235485U CN 200820123548 U CN200820123548 U CN 200820123548U CN 201285792 Y CN201285792 Y CN 201285792Y
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Abstract
The utility model provides a temperature compensation mechanism used for a resonant cavity, comprising a metal perturbation rod with at least one part extending into the resonant cavity, a power source generating thrust force to the metal perturbation rod along with the change of the temperature, an offsetting component generating thrust force opposite to the power source for the metal perturbation rod, a shell fixed on the wall of the resonant cavity, and a contact spring fixed on the shell to ensure the favorable contact between the metal perturbation rod and the shell. The temperature compensation mechanism is suitable for rectangular and cylindrical waveguide resonant cavity and can be also applied to a coaxial cavity. The temperature compensation mechanism is installed in the proper position of the resonant cavity, and the metal perturbation rod is inserted in the resonant cavity, when the temperature changes, a heat-variable power source in the temperature compensation mechanism can push the metal perturbation rod to change the position, thereby the frequency of the resonant cavity is adjusted and the effect of temperature compensation is achieved.
Description
Technical field
The utility model relates to and has the temperature compensation mechanism that is used for resonant cavity, specifically, relates to the temperature compensation mechanism that utilizes metal disturbance rod to realize the temperature-compensating of resonant cavity.
Background technology
Resonant cavity is important microwave device, is widely used in the equipment such as filter, power combiner.Resonance frequency is one of most important parameter of resonant cavity.When the high power broadcast TV RF signals when containing the equipment of resonant cavity because the power loss of resonant cavity has part energy and is converted into heat energy, the temperature of equipment can raise, and causes the volume of resonant cavity and shape that small variation takes place.Though this variation naked eyes discover less than, can cause the drift of resonance frequency, thereby the performance of equipment is changed, influence its normal use.So the microwave cavity in the practical application must have good temperature stability, must guarantee that the resonance frequency of resonant cavity keeps constant in certain temperature range.
In order to make microwave cavity that good temperature characterisitic be arranged, method relatively more commonly used at present generally can be divided into two kinds.A kind of is to adopt the little indium steel of thermal coefficient of expansion to make resonant cavity.The frequency stability of the resonant cavity that this material is made is about 10 times of the resonant cavity made by common copper or aluminium, but the shortcoming of indium steel is also many, as the cost height, to be not easy welding, conduction rate variance, density of material big etc.The inwall of the cavity that the indium steel is made must silver-platedly could use.Because the temperature expansion coefficient of silver and indium steel differs greatly,, can peel off attached to the silver coating on the indium steel when cavity in use changes repeatedly owing to temperature.When a fritter peeled off earlier, this place was because the difference of indium steel and silver-colored conductance can cause sparking, thus the damage of acceleration cavity.
The another kind of method that increases the resonant cavity temperature stability is carried out temperature-compensating to resonant cavity exactly.Temperature-compensating (Temperature Compensation) is exactly to use someway, and the influence that compensation temperature is caused the resonant cavity resonance frequency is stabilized in the resonance frequency of resonant cavity in the acceptable scope.
Because the various temperature compensation technique has appearred in technique for temperature compensation importance in actual applications at present." changing the resonant cavity profile " technology as shown in Figure 1 is wherein a kind of.For rectangle and cylindrical waveguide resonant cavity, their resonance frequency is by the outside dimension decision of resonant cavity.Therefore, change some overall dimension of resonant cavity, can reach the effect of temperature-compensating.For the different mode of resonance of resonant cavity, need the position of correct selection profile disturbance.Fig. 1 a is the situation that cavity wall moves horizontally, and Fig. 1 b is the situation of cavity wall stress deformation.This temperature compensation is intuitively effective, but shortcoming also is tangible.For the situation of Fig. 1 a, cavity wall need solve the contact problems of mobile cavity body wall with other cavity wall well owing to can move freely; For the situation of Fig. 1 b, because the stressed needs of cavity wall are suitably crooked, therefore on manufacture craft, have higher requirements, and the motive force that this temperature compensation needs is bigger.
Another is exactly the technology of " fixing coaxial cavity inner conductor length ".For the coaxial resonant cavity of capacitive load, temperature mainly is that the inner wire length variations causes to the influence of resonance frequency.A kind of method that increases the coaxial resonant cavity temperature stability is exactly the length of fixing coaxial cavity inner conductor.Shown in Fig. 1 c.In this structure, the inner wire of coaxial cavity is made up of two parts, uses the reed contact between them, makes moving freely that these two parts can be relative.Inner wire 2 links together by an indium steel bar with outer conductor.Because the thermal coefficient of expansion of indium steel is very little, can think that when temperature raise, inner wire 2 was fixed.Though inner wire 1 expanded by heating, length increases, and the total length of inner wire does not change, and has so just played the effect of stable resonant oscillation frequency.This way has some not enough.At first be that temperature-compensating is incomplete.Though inner wire length was constant substantially when this structure can guarantee variations in temperature, the cavity outer conductor is vicissitudinous, and this resonance frequency to resonant cavity is influential equally.Next is exactly the contact problems of reed.Reed moves repeatedly and friction may make reed lose efficacy.
Summary of the invention
The utility model is based on perturbation theory development and comes.The utility model provides a kind of temperature compensation mechanism that is used for resonant cavity, it is characterized in that, described temperature compensation mechanism comprises:
Metal disturbance rod, at least a portion of described metal disturbance rod extend in the resonant cavity;
Power source, described power source comprises at least one thrermostatic bimetal-plate, described power source provides in resonant cavity or the motive force outside described resonant cavity along with the variation of resonant cavity ambient temperature to described disturbance metal bar;
Biasing member, described biasing member produces the thrust opposite with power source to metal disturbance rod;
Shell, described shell are fixed on the resonant cavity body wall,
Contact spring, described contact spring be fixed on the shell so that metal disturbance rod with the good contact between shell;
Wherein, described metal disturbance rod, power source and biasing member are arranged in the described shell, and metal disturbance rod stretches out from the open end of described shell.
According to temperature compensation mechanism of the present utility model, preferably, described power source comprises a plurality of thrermostatic bimetal-plates, the little coefficient of thermal expansion face of per two thrermostatic bimetal-plates in these thrermostatic bimetal-plates is relative, it is right to constitute a thrermostatic bimetal-plate, and a plurality of thrermostatic bimetal-plate is to stacking into the thrermostatic bimetal-plate group in the contacted mode of big coefficient of thermal expansion face.
According to temperature compensation mechanism of the present utility model, preferably, described disturbance metal bar comprises the barred body part and is in the flange portion of this barred body part one end, the cross-sectional diameter of described flange portion or width are greater than the cross-sectional diameter or the width of described barred body part, wherein, the flange portion of described disturbance metal bar is between the blind end and annular ridge of shell in the enclosure, and the barred body part is passed from the center of annular ridge and is stretched out outside the open end of shell, extend in the resonant cavity cavity; A power source end in the enclosure abuts against the inwall of the blind end of shell, and the other end abuts against the side towards the blind end of shell of the flange portion of disturbance metal bar; A biasing member end in the enclosure abuts against the side that partly is connected with barred body of the flange portion of disturbance metal bar, and the other end abuts against annular ridge in the shell towards a side of closed termination of outer cover; The central authorities of the annular ridge of the barred body of disturbance metal bar part in the shell are passed, and and be arranged on contact spring Elastic Contact between the open end of annular ridge and shell, thereby make the disturbance metal bar under the effect of the opposite power of direction that power source and biasing member provide and under the support at contact spring, be suspended in the shell.
According to temperature compensation mechanism of the present utility model, preferably, described disturbance metal bar comprises the barred body part, middle interconnecting piece divides and flange portion, barred body part and flange portion are connected to the two ends that middle interconnecting piece divides, cross-sectional diameter that middle interconnecting piece divides or width are less than the cross-sectional diameter or the width of barred body part and flange portion, and described thrermostatic bimetal-plate has center through hole, wherein, the flange portion of disturbance metal bar is between the blind end and annular ridge of shell in the enclosure, the middle interconnecting piece branch passes the center through hole of thrermostatic bimetal-plate with can move freely, and the barred body part contacts with contact spring and stretches out outside the open end of shell, extend in the resonant cavity cavity; A power source end in the enclosure abuts against the side that is connected with the middle interconnecting piece branch of the flange portion of disturbance metal bar, and the other end abuts against annular ridge in the shell towards a side of closed termination of outer cover; A biasing member end in the enclosure abuts against the inwall of the blind end of shell, and the other end abuts against the side towards the blind end of shell of the flange portion of disturbance metal bar; The barred body of disturbance metal bar part and be arranged on contact spring Elastic Contact between the open end of annular ridge and shell, thereby make the disturbance metal bar under the effect of the opposite power of direction that power source and biasing member provide and under the support at contact spring, be suspended in the shell.
According to temperature compensation mechanism of the present utility model, preferably, described biasing member is a spring.
According to temperature compensation mechanism of the present utility model, preferably, described shell passes the through hole on the resonant cavity cavity wall and is installed on the cavity wall of resonant cavity, this shell is the cylinder chamber with blind end and open end, the part that this shell has the open end is in the resonant cavity cavity, and the part that this shell has a blind end is in outside the resonant cavity cavity.
According to temperature compensation mechanism of the present utility model, preferably, described shell also is formed with and the parallel plane annular ridge in the open end of shell near on the inwall of its open end one side, and described contact spring is arranged between the open end of described circular fin and shell.Be formed with screw thread on the outer wall of described shell, be formed with the screw thread of the threaded engagement that forms on the outer wall with described shell on the through-hole wall on the described resonant cavity cavity wall.
Temperature compensation mechanism of the present utility model is applicable to rectangle and cylindrical waveguide resonant cavity, equally also can be applied in the coaxial cavity.This temperature compensation mechanism is installed on the suitable position of resonant cavity, metal disturbance rod inserts in the resonant cavity, and when variations in temperature, the temperature-sensitive power source in the temperature compensation mechanism can promote metal disturbance rod and change the position, thereby regulate the frequency of resonant cavity, play the effect of temperature-compensating.
Description of drawings
By reading, can better understand the utility model below with reference to description of drawings.And characteristics of the present utility model and advantage also can be more obvious.
Fig. 1 a is the schematic diagram that carries out the temperature compensation mechanism of temperature-compensating according to the position of passing through change resonant cavity body wall of prior art;
Fig. 1 b is the schematic diagram that carries out the temperature compensation mechanism of temperature-compensating according to the shape of passing through change resonant cavity body wall of prior art;
Fig. 1 c is the schematic diagram according to the temperature compensation mechanism of the coaxial resonant cavity of prior art;
Fig. 2 represents the temperature compensation mechanism according to a kind of execution mode of the present utility model; With
Fig. 3 represents the temperature compensation mechanism according to another kind of execution mode of the present utility model.
Embodiment
Introduce according to temperature compensation mechanism of the present utility model in detail below with reference to accompanying drawings.
The utility model has provided and has adopted thrermostatic bimetal-plate or the thrermostatic bimetal-plate group temperature compensation mechanism as power source.Thrermostatic bimetal-plate produces power along with the cavity environment variation of temperature, promote or spur metal disturbance rod and move in cavity, thereby compensates is to the influence of cavity resonant frequency.
Fig. 2 is the schematic diagram according to the temperature compensation mechanism of a kind of execution mode of the present utility model.As shown in Figure 2, temperature compensation mechanism 100 comprises disturbance metal bar 101, power source 102, biasing member 103, shell 104 and contact spring 105.The through hole (not shown) that temperature compensation mechanism 100 passes on the resonant cavity cavity wall is installed on the cavity wall of resonant cavity, closely cooperates between the inwall of the through hole on the outer wall of temperature compensation mechanism 100 and the resonant cavity cavity wall.Shell 104 is end sealing, open cylindrical cavities of the other end of being made by conductor.And on the inwall of shell 104, also be formed with end face parallel annular fin with shell 104 near open end one side.Though not shown, according to a kind of preferred implementation, also be formed with screw thread on the outer wall of shell 104.In this case, also be provided with on the through-hole wall that is provided with on the resonant cavity cavity wall with shell 104 outer walls on the screw thread of screw thread coupling, thereby shell 104 and resonant cavity can be installed as one.In addition, cooperating also between the shell 104 of temperature compensation mechanism 100 and the resonant cavity cavity wall can be adopted alternate manner, and for example screw is fixed, conductive solder, conductive adhesive, sealing are pegged graft or the like.
As shown in Figure 2, disturbance metal bar 101, power source 102, biasing member 103, contact spring 105 all are installed in the shell 104, and power source 102 and biasing member 103 are between the blind end of annular ridge and shell 104, contact spring 105 is between the open end of annular ridge and shell 104, and disturbance metal bar 101 is suspended in the shell 104 under the effect of power source 102, biasing member 103 and contact spring 105.That part that shell 104 has blind end is in outside the resonant cavity cavity, and that part with open end is within the resonant cavity cavity.
As shown in Figure 2, the disturbance metal bar 101 of temperature compensation mechanism 100 has the shape that is similar to bolt, that is, disturbance metal bar 101 comprises the barred body part and is in the flange portion of this barred body part one end that the diameter of this flange portion or width are greater than the diameter or the width of this barred body part.Preferably, the barred body part is coaxial with flange portion.And barred body part and flange portion can be respectively cylinder or multiedge cylinder.
As shown in Figure 2, power source 102 comprises the thrermostatic bimetal-plate group that a plurality of thrermostatic bimetal-plates are formed.According to a kind of preferred implementation, as shown in Figure 2, the thrermostatic bimetal-plate group comprises 10 thrermostatic bimetal-plates.In these thrermostatic bimetal-plates, the little coefficient of thermal expansion face of per two thrermostatic bimetal-plates is relative, and it is right to constitute a thrermostatic bimetal-plate.And a plurality of thrermostatic bimetal-plates are to stacking into the thrermostatic bimetal-plate group in the contacted mode of big coefficient of thermal expansion face.These thrermostatic bimetal-plates can be the bar shaped thrermostatic bimetal-plates, also can be dish-shaped thrermostatic bimetal-plates.
As shown in Figure 2, in shell 104, the contact spring 105 that conductor is made is installed also.This contact spring 105 is installed between the open end of annular ridge on the outer casing inner wall and shell 104.The back will be introduced, and contact spring 105 is used to guarantee that 104 on disturbance metal bar 101 and shell keep good electrical to be connected.Like this, owing to make by for example threaded engagement and to have kept good electrical to be connected between shell 104 and the resonant cavity cavity wall, guaranteed that therefore the maintenance good electrical is connected between disturbance metal bar 101 and the resonant cavity cavity wall.
As shown in Figure 2, biasing member 103 can be a spring.This biasing member 103 provides the thrust direction that provides with power source 102 opposite bias force for disturbance metal bar 101.Disturbance metal bar 101 passes from spring inner.
As shown in Figure 2, the flange portion of disturbance metal bar 101 is in shell 104 between the blind end and annular ridge of shell 104.And the barred body part is passed from the center of annular ridge and is stretched out outside the open end of shell 104, extend in the resonant cavity cavity.Power source 102, promptly the thrermostatic bimetal-plate group 102, and an end abuts against the inwall of the blind end of shell 104 in shell 104, and the other end abuts against the side towards the blind end of shell 104 of the flange portion of disturbance metal bar 101.Biasing member 103 end in shell 104 abuts against a side that partly is connected with barred body of the flange portion of disturbance metal bar 101, and the other end abuts against annular ridge in the shell 104 towards a side of shell 104 blind ends.Thereby make disturbance metal bar 101 under the effect of the opposite power of direction that power source 102 and biasing member 103 provide and under the support of contact spring 105, be suspended in the shell 104.The central authorities of the annular ridge of the barred body of disturbance metal bar 101 part in the shell 104 are passed, and and be arranged on contact spring 105 Elastic Contact between the open end of annular ridge and shell 104, thereby guarantee that disturbance metal bar 101 can freely stretch out from shell 104 and the prerequisite of withdrawal to shell 104 under, the while has guaranteed being electrically connected between disturbance metal bar 101 and the shell 104 by contact spring 105.Thereby guaranteed being electrically connected between disturbance metal bar 101 and the resonant cavity cavity wall.
According to execution mode shown in Figure 2, when temperature rises, the flexibility of each thrermostatic bimetal-plate increases, thereby the right height of each thrermostatic bimetal-plate increases, cause the height of whole thrermostatic bimetal-plate group to increase, thereby the thrermostatic bimetal-plate group increases the thrust of disturbance metal bar 101, broken the original balance between the thrust of the bias force of biasing member 103 and thrermostatic bimetal-plate group 102, so that promote metal disturbance rod 101 and move, between the thrust of the bias force of biasing member 103 and thrermostatic bimetal-plate group 102, reach balance once more to inside cavity.
It should be noted that power source 102, promptly the thrermostatic bimetal-plate group 102, in the quantity of the thrermostatic bimetal-plate that comprises can be a slice, also can be multi-disc, this depends on that cavity needs the degree of temperature-compensating.In fact, be exactly by adjusting the quantity and the overall dimension of thrermostatic bimetal-plate, obtaining the regulated quantity of needed temperature-compensating.
Below with reference to the temperature compensation mechanism of Fig. 3 introduction according to another kind of execution mode of the present utility model.
Fig. 3 is the schematic diagram according to the temperature compensation mechanism of another kind of execution mode of the present utility model.As shown in Figure 3, temperature compensation mechanism 200 comprises disturbance metal bar 201, power source 102, biasing member 103, shell 104 and contact spring 105.The through hole (not shown) that temperature compensation mechanism 200 passes on the resonant cavity cavity wall is installed on the cavity wall of resonant cavity, closely cooperates between the inwall of the through hole on the outer wall of temperature compensation mechanism 200 and the resonant cavity cavity wall.Shell 104 is end sealing, open cylindrical cavities of the other end of being made by conductor.And on the inwall of shell 104, also be formed with end face parallel annular fin with shell 104 near open end one side.Though not shown, according to a kind of preferred implementation, also be formed with screw thread on the outer wall of shell 104.In this case, also be formed with on the through-hole wall that is provided with on the resonant cavity cavity wall with shell 104 outer walls on the screw thread of screw thread coupling, thereby shell 104 and resonant cavity can be installed as one.In addition, cooperating also between the shell 104 of temperature section mechanism 200 and the resonant cavity cavity wall can be adopted alternate manner, and for example conductive solder, conductive adhesive, sealing are pegged graft or the like.
As shown in Figure 3, disturbance metal bar 201, power source 102, biasing member 103, contact spring 105 all are installed in the shell 104, and power source 102 and biasing member 103 are between the blind end of annular ridge and shell 104, contact spring 105 is between the open end of annular ridge and shell 104, and disturbance metal bar 201 is suspended in the shell 104 under the effect of power source 102, biasing member 103 and contact spring 105.That part that shell 104 has blind end is in outside the resonant cavity cavity, and that part with open end is within the resonant cavity cavity.
As shown in Figure 3, the disturbance metal bar 201 of temperature compensation mechanism 200 has the shape that is similar to dumbbell, promptly, disturbance metal bar 201 comprises that barred body part, middle interconnecting piece divide and flange portion, barred body part and flange portion are connected to the two ends that middle interconnecting piece divides, and diameter that middle interconnecting piece divides or width are less than the diameter or the width of barred body part and flange portion.Preferably, barred body part, middle interconnecting piece branch and flange portion are coaxial.And barred body part, middle interconnecting piece divide and flange portion can be respectively cylinder or multiedge cylinder.
As shown in Figure 3, power source 102 comprises the thrermostatic bimetal-plate group that a plurality of thrermostatic bimetal-plates are formed.According to a kind of preferred implementation, as shown in Figure 3, the thrermostatic bimetal-plate group comprises 10 thrermostatic bimetal-plates.In these thrermostatic bimetal-plates, the little coefficient of thermal expansion face of per two thrermostatic bimetal-plates is relative, and it is right to constitute a thrermostatic bimetal-plate.And a plurality of thrermostatic bimetal-plates are to stacking into the thrermostatic bimetal-plate group in the contacted mode of big coefficient of thermal expansion face.These thrermostatic bimetal-plates can be the bar shaped thrermostatic bimetal-plates, also can be dish-shaped thrermostatic bimetal-plates.These thrermostatic bimetal-plates are formed with through hole on middle position, when these thrermostatic bimetal-plates stack when forming the thrermostatic bimetal-plate group together, the center of the through hole on each thrermostatic bimetal-plate middle position is in a straight line, thereby passes from these through holes for the middle interconnecting piece branch of disturbance metal bar 201.At this moment, for the middle interconnecting piece branch that makes disturbance metal bar 201 can pass from these through holes, the flange portion of disturbance metal bar 201 and/or barred body partly can separate with the middle interconnecting piece branch.For example, the flange portion of disturbance metal bar 201 and/or barred body part can pass through threaded engagement, grafting, conductive adhesive etc. and middle interconnecting piece branch and is connected.
As shown in Figure 3, in shell 104, the contact spring 105 that conductor is made is installed also.This contact spring 105 is installed between the open end of annular ridge on the outer casing inner wall and shell 104.The back will be introduced, and contact spring 105 is used to guarantee that 104 on disturbance metal bar 201 and shell keep good electrical to be connected.Like this, owing to make by for example threaded engagement and to have kept good electrical to be connected between shell 104 and the resonant cavity cavity wall, guaranteed that therefore the maintenance good electrical is connected between disturbance metal bar 201 and the resonant cavity cavity wall.
As shown in Figure 3, biasing member 103 can be a spring.This biasing member 103 provides the thrust direction that provides with power source 102 opposite bias force for disturbance metal bar 201.
As shown in Figure 3, the flange portion of disturbance metal bar 201 is in shell 104 between the blind end and annular ridge of shell 104.The middle interconnecting piece branch passes the center through hole of power source (thrermostatic bimetal-plate group) 102 with can move freely.And the barred body part contacts with contact spring 105 and stretches out outside the open end of shell 104, extend in the resonant cavity cavity.Power source 102, it is thrermostatic bimetal-plate group 102, an end abuts against a side that is connected with the middle interconnecting piece branch of the flange portion of disturbance metal bar 201 in shell 104, and the other end abuts against annular ridge in the shell 104 towards a side of shell 104 blind ends.Biasing member 103 end in shell 104 abuts against the inwall of the blind end of shell 104, and the other end abuts against the side towards the blind end of shell 104 of the flange portion of disturbance metal bar 201.Thereby make disturbance metal bar 201 under the effect of the opposite power of direction that power source 102 and biasing member 103 provide and under the support of contact spring 105, be suspended in the shell 104.The barred body of disturbance metal bar 201 part and be arranged on contact spring 105 Elastic Contact between the open end of annular ridge and shell 104, thereby guarantee that disturbance metal bar 201 can freely stretch out from shell 104 and the prerequisite of withdrawal to shell 104 under, the while has guaranteed being electrically connected between disturbance metal bar 201 and the shell 104 by contact spring 105.Thereby guaranteed being electrically connected between disturbance metal bar 201 and the resonant cavity cavity wall.
According to execution mode shown in Figure 3, when temperature rises, the flexibility of each thrermostatic bimetal-plate increases, thereby the right height of each thrermostatic bimetal-plate increases, cause the height of whole thrermostatic bimetal-plate group to increase, thereby the thrermostatic bimetal-plate group increases the thrust of disturbance metal bar 201, broken the original balance between the thrust of the bias force of biasing member 103 and thrermostatic bimetal-plate group 102, so that promote metal disturbance rod 201 and move to cavity is outside, between the thrust of the bias force of biasing member 103 and thrermostatic bimetal-plate group 102, reach balance once more.
It should be noted that power source 102, promptly the thrermostatic bimetal-plate group 102, in the quantity of the thrermostatic bimetal-plate that comprises can be a slice, also can be multi-disc, this depends on that cavity needs the degree of temperature-compensating.In fact, be exactly by adjusting the quantity and the overall dimension of thrermostatic bimetal-plate, obtaining the regulated quantity of needed temperature-compensating.
Temperature compensation mechanism of the present utility model is applicable to rectangle and cylindrical waveguide resonant cavity, equally also can be applied in the coaxial cavity.This temperature compensation mechanism is installed on the suitable position of resonant cavity, make the disturbance metal bar be inserted in the resonant cavity, when variations in temperature, the temperature-sensitive power source in the device can promote the disturbance metal bar and change the position, thereby regulate the frequency of resonant cavity, play the effect of temperature-compensating.
The utility model should be appreciated that by the explanation of above embodiment the utility model is not limited to described embodiment and scheme; Here these that are comprised are implemented and the purpose of scheme is, help those skilled in the art to put into practice the utility model; Those skilled in the art is easy under the situation that does not break away from the utility model design, further improvement and perfect.Therefore, the utility model only is subjected to the qualification of the application's claims, and the various technical schemes that the design of all and the utility model is identical are all within this claim protection range.
Claims (8)
1, a kind of temperature compensation mechanism that is used for resonant cavity is characterized in that, described temperature compensation mechanism comprises:
Metal disturbance rod, at least a portion of described metal disturbance rod extend in the resonant cavity;
Power source, described power source comprises at least one thrermostatic bimetal-plate, described power source provides in resonant cavity or the motive force outside described resonant cavity along with the variation of resonant cavity ambient temperature to described disturbance metal bar;
Biasing member, described biasing member produces the thrust opposite with power source to metal disturbance rod;
Shell, described shell are fixed on the resonant cavity body wall,
Contact spring, described contact spring be fixed on the shell so that metal disturbance rod with the good contact between shell;
Wherein, described metal disturbance rod, power source and biasing member are arranged in the described shell, and metal disturbance rod stretches out from the open end of described shell.
2, according to the described temperature compensation mechanism of claim 1, it is characterized in that, described power source comprises a plurality of thrermostatic bimetal-plates, the little coefficient of thermal expansion face of per two thrermostatic bimetal-plates in these thrermostatic bimetal-plates is relative, it is right to constitute a thrermostatic bimetal-plate, and a plurality of thrermostatic bimetal-plate is to stacking into the thrermostatic bimetal-plate group in the contacted mode of big coefficient of thermal expansion face.
3, according to the described temperature compensation mechanism of claim 1, it is characterized in that, described disturbance metal bar comprises the barred body part and is in the flange portion of this barred body part one end, the cross-sectional diameter of described flange portion or width are greater than the cross-sectional diameter or the width of described barred body part, wherein, the flange portion of described disturbance metal bar is between the blind end and annular ridge of shell in the enclosure, and the barred body part is passed from the center of annular ridge and is stretched out outside the open end of shell, extend in the resonant cavity cavity; A power source end in the enclosure abuts against the inwall of the blind end of shell, and the other end abuts against the side towards the blind end of shell of the flange portion of disturbance metal bar; A biasing member end in the enclosure abuts against the side that partly is connected with barred body of the flange portion of disturbance metal bar, and the other end abuts against annular ridge in the shell towards a side of closed termination of outer cover; The central authorities of the annular ridge of the barred body of disturbance metal bar part in the shell are passed, and and be arranged on contact spring Elastic Contact between the open end of annular ridge and shell, thereby make the disturbance metal bar under the effect of the opposite power of direction that power source and biasing member provide and under the support at contact spring, be suspended in the shell.
4, according to the described temperature compensation mechanism of claim 1, it is characterized in that, described disturbance metal bar comprises the barred body part, middle interconnecting piece divides and flange portion, barred body part and flange portion are connected to the two ends that middle interconnecting piece divides, cross-sectional diameter that middle interconnecting piece divides or width are less than the cross-sectional diameter or the width of barred body part and flange portion, and described thrermostatic bimetal-plate has center through hole, wherein, the flange portion of disturbance metal bar is between the blind end and annular ridge of shell in the enclosure, the middle interconnecting piece branch passes the center through hole of thrermostatic bimetal-plate with can move freely, and the barred body part contacts with contact spring and stretches out outside the open end of shell, extend in the resonant cavity cavity; A power source end in the enclosure abuts against the side that is connected with the middle interconnecting piece branch of the flange portion of disturbance metal bar, and the other end abuts against annular ridge in the shell towards a side of closed termination of outer cover; A biasing member end in the enclosure abuts against the inwall of the blind end of shell, and the other end abuts against the side towards the blind end of shell of the flange portion of disturbance metal bar; The barred body of disturbance metal bar part and be arranged on contact spring Elastic Contact between the open end of annular ridge and shell, thereby make the disturbance metal bar under the effect of the opposite power of direction that power source and biasing member provide and under the support at contact spring, be suspended in the shell.
According to the described temperature compensation mechanism of claim 1, it is characterized in that 5, described biasing member is a spring.
6, according to claim 1,3 or 4 described temperature compensation mechanisms, it is characterized in that, described shell passes the through hole on the resonant cavity cavity wall and is installed on the cavity wall of resonant cavity, this shell is the cylinder chamber with blind end and open end, the part that this shell has the open end is in the resonant cavity cavity, and the part that this shell has a blind end is in outside the resonant cavity cavity.
7, according to the described temperature compensation mechanism of claim 6, it is characterized in that, described shell also is formed with and the parallel plane annular ridge in the open end of shell near on the inwall of its open end one side, and described contact spring is arranged between the open end of described circular fin and shell.
8, according to the described temperature compensation mechanism of claim 6, it is characterized in that, be formed with screw thread on the outer wall of described shell, be formed with the screw thread of the threaded engagement that forms on the outer wall with described shell on the through-hole wall on the described resonant cavity cavity wall.
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| CNU2008201235485U CN201285792Y (en) | 2008-11-04 | 2008-11-04 | Temperature compensation mechanism for resonator cavity |
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| CNU2008201235485U CN201285792Y (en) | 2008-11-04 | 2008-11-04 | Temperature compensation mechanism for resonator cavity |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101771186A (en) * | 2010-01-19 | 2010-07-07 | 南京邮电大学 | Self temperature compensation round waveguide TE011 mode resonant cavity |
| CN101710638B (en) * | 2009-12-07 | 2012-07-04 | 东南大学 | Self-temperature compensating rectangular waveguide resonant cavity |
| CN104347919A (en) * | 2013-08-08 | 2015-02-11 | 北京飞卡科技有限公司 | Temperature compensation device and temperature compensation method for microwave filter |
| CN109841937A (en) * | 2019-04-04 | 2019-06-04 | 江苏德是和通信科技有限公司 | A kind of bridge-type synthesizer |
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2008
- 2008-11-04 CN CNU2008201235485U patent/CN201285792Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710638B (en) * | 2009-12-07 | 2012-07-04 | 东南大学 | Self-temperature compensating rectangular waveguide resonant cavity |
| CN101771186A (en) * | 2010-01-19 | 2010-07-07 | 南京邮电大学 | Self temperature compensation round waveguide TE011 mode resonant cavity |
| CN101771186B (en) * | 2010-01-19 | 2013-04-10 | 南京邮电大学 | Self temperature compensation round waveguide TE011 mode resonant cavity |
| CN104347919A (en) * | 2013-08-08 | 2015-02-11 | 北京飞卡科技有限公司 | Temperature compensation device and temperature compensation method for microwave filter |
| CN104347919B (en) * | 2013-08-08 | 2017-08-25 | 北京飞卡科技有限公司 | A kind of temperature compensation means and its temperature compensation for microwave filter |
| CN109841937A (en) * | 2019-04-04 | 2019-06-04 | 江苏德是和通信科技有限公司 | A kind of bridge-type synthesizer |
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Granted publication date: 20090805 Termination date: 20091204 |