CN103715011B - RF thermal cut-ofves - Google Patents
RF thermal cut-ofves Download PDFInfo
- Publication number
- CN103715011B CN103715011B CN201310465703.7A CN201310465703A CN103715011B CN 103715011 B CN103715011 B CN 103715011B CN 201310465703 A CN201310465703 A CN 201310465703A CN 103715011 B CN103715011 B CN 103715011B
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- CN
- China
- Prior art keywords
- ofves
- thermal cut
- transmission line
- conducting bolt
- bolt
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
- H01H37/767—Normally open
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/36—Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/24—Terminating devices
- H01P1/28—Short-circuiting plungers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/30—Auxiliary devices for compensation of, or protection against, temperature or moisture effects ; for improving power handling capability
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
Abstract
Some aspects are intended to a kind of thermal cut-off for preventing RF apparatus overheats in telecommunication system.The RF thermal cut-ofves include main body, conducting bolt and drive mechanism.The main body can be placed on the transmission line between RF signal sources and RF equipment.The conducting bolt is placed in the main body.The conducting bolt has enough length to respond the conducting bolt for the energized conductor for contacting the transmission line and in the protection point offer impedance of the transmission line.The impedance is enough the part for feeding back the input power of the RF signals from RF sources.The drive mechanism can respond the temperature for being located near or at protection point more than threshold value and so that the conducting bolt contacts the energized conductor.
Description
The cross reference of related application
The application is asked in submission on April 24th, 2012, entitled " RF Termination Device with
The U.S. Provisional Application of Thermal Over-Temperature Protection Fuse " Serial No. 61/637,632 with
And submitted on October 9th, 2012, entitled " RFThermal Fuse ", the U.S. Provisional Application of Serial No. 61/711,350
Priority, contents of both of which by quote and in herein.
Technical field
This invention relates generally to telecommunication system, more specifically（But it is not necessarily limited to this）It is related to in telecommunication system
In prevent the thermal cut-ofves of RF apparatus overheats.
Background technology
The signal power received by telecommunication apparatus in telecommunication system may be such that the temperature of telecommunication apparatus improves.Telecommunication apparatus can
With the cooling body of the temperature including maintaining telecommunication apparatus intraware, so that intraware will not be by heat damages.It is cold
But the example of mechanism can include the pressure air stream provided by cooling fan.
The cooling mechanism of such as cooling fan can be powered by the power supply in telecommunication apparatus.Power supply deficiency, which may result in, stops
Only electric power is provided to cooling mechanism.Power supply deficiency may include（But it is not limited to）Defective power supply, is powered off, overcurrent fusing
Device tripping operation etc..The power attenuation of cooling body can cause the temperature of the other assemblies of RF terminal devices or telecommunication apparatus to increase, with
Will be overstretched as the component, defective and/or contact is dangerous.
Summary of the invention
Certain aspects of the invention and feature are intended to the thermal cut-off for avoiding RF apparatus overheats in telecommunication system.
On the one hand, there is provided a kind of RF thermal cut-ofves.The RF thermal cut-ofves include body, conducting bolt and drive mechanism.
The main body can be placed on the transmission line between RF signal sources and RF equipment.The conducting bolt is placed in the main body.Institute
Stating conducting bolt has enough length to respond the conducting bolt for the energized conductor for contacting the transmission line and described
The protection point of transmission line provides impedance.The impedance is enough the part for feeding back the input power of the RF signals from RF sources.Institute
The temperature for being located near or at protection point can be responded more than threshold value and so that conducting bolt contact is described powered by stating drive mechanism
Conductor.
On the other hand, there is provided a kind of thermal protection system.The thermal protection system includes multiple RF fuses.Each RF fusing
Device includes body, conducting bolt and drive mechanism.The main body is placed on the transmission line between RF signal sources and RF equipment.Institute
Conducting bolt is stated to be placed in the main body.The conducting bolt has enough length to respond the powered of the contact transmission line
The conducting bolt of conductor and the transmission line protection point provide impedance.The drive mechanism can be responded and is located near or at
The temperature of protection point exceedes threshold value and causes the conducting bolt to contact the energized conductor.The RF thermal cut-ofves are placed in interval
Transmission line on so that the multiple RF thermal cut-ofves provide combined impedance, the combined impedance is suitable to feedback from described
A part for the ingoing power of RF signals in the predetermined frequency band of RF signal sources.
On the other hand, there is provided a kind of system.The system include by the RF equipment of transmission line and RF signal sources traffics and
The RF thermal cut-ofves being placed on the transmission line.The RF thermal cut-ofves include main body, conducting bolt and drive mechanism.It is described
Main body can be placed on the transmission line between the RF signal sources and RF equipment.The conducting bolt is placed in the main body.It is described
Conducting bolt has sufficient length to respond the conducting bolt for the energized conductor for contacting the transmission line and in the transmission
The protection point of line provides impedance.The impedance is enough the part for feeding back the input power of the RF signals from the RF sources.Institute
The temperature for being located near or at protection point can be responded more than threshold value and so that conducting bolt contact is described powered by stating drive mechanism
Conductor.
Brief description
Fig. 1 is according on one side, is placed in the frame along the example RF thermal cut-ofves of transmission line between base station and RF equipment
Figure.
Fig. 2 is according on one side, is placed in the sectional view along the irreversible RF thermal cut-ofves of transmission line.
Fig. 3 is according on one side, and the sectional view of the irreversible RF thermal cut-ofves of short circuit is produced in transmission line.
Fig. 4 is according to the alternative example RF hot melts on one side, being placed in along the transmission line between base station and RF equipment
The block diagram of disconnected device.
Fig. 5 is according on one side, is placed in the cross-sectional side view along the reversible RF thermal cut-ofves of transmission line.
Fig. 6 is according on one side, and the sectional view of the reversible RF thermal cut-ofves of short circuit is produced in transmission line.
Fig. 7 is according on one side, has the side view of the reversible RF thermal cut-ofves of steering ring.
Fig. 8 is according on one side, has the cross section being placed in along the reversible RF thermal cut-ofves of the steering ring of transmission line
Side view.
Fig. 9 is according on one side, has the horizontal stroke of the reversible RF thermal cut-ofves for the steering ring that short circuit is produced in transmission line
Side cross-sectional view.
Figure 10 is according on one side, is broken by being placed in along the reversible RF hot melts of the bimetallic drive mechanism driving of transmission line
The cross-sectional side view of device.
Figure 11 is the reversible RF heat for the bimetallic drive mechanism driving that short circuit is created in transmission line according on one side, having
The cross-sectional side view of fuse.
Figure 12 is according on one side, is placed in the cross-sectional side view along the electromagnetic drive RF thermal cut-ofves of transmission line.
Figure 13 is the cross-sectional side of the electromagnetic drive RF thermal cut-ofves by creating short circuit in transmission line according to one side
View.
Figure 14 be according on one side, positioned at along transmission line by expansible gas-powered RF thermal cut-ofves cross-sectional side
View.
Figure 15 is the RF thermal cut-ofves of the expansible gas-powered by producing short circuit in transmission line according on one side
Cross-sectional side view.
Figure 16 is the frame to be broken according to the example RF hot melts on one side, being placed in along the transmission line between base station and RF equipment
Figure.
Figure 17 is according on one side, is placed in for creating along the transversal of the RF thermal cut-ofves of the open electric circuit of transmission line
Surface side view.
Figure 18 is according on one side, is placed in for creating along the transversal of the RF thermal cut-ofves of the open electric circuit of transmission line
Surface side view.
Figure 19 is according on one side, is placed in for creating along the cascade RF thermal cut-ofves of the opening electric power of transmission line
Cross-sectional side view.
Figure 20 is according on one side, is placed in for creating along the cascade RF thermal cut-ofves of the opening electric power of transmission line
Cross-sectional side view.
Figure 21 is disconnected along the alternative exemplary RF hot melts of the transmission line between base station and RF equipment according on one side, being placed in
The block diagram of device.
Figure 22 is according on one side, and there is dielectric material to be placed in the cross-sectional side along the RF thermal cut-ofves of transmission line
View.
Figure 23 is the RF thermal cut-ofves for the dielectric material that open electric circuit is produced in transmission line according on one side, having
Cross-sectional side view.
Figure 24 is according on one side, and there is dielectric material to be placed in along the transversal of the cascade RF thermal cut-ofves of transmission line
Surface side view.
Figure 25 is that the cascade RF hot melts for the dielectric material that open electric circuit is produced in transmission line according on one side, having are disconnected
The cross-sectional side view of device.
Figure 26 is according on one side, including RF terminal devices and passes through transmission line and the frame of the RF equipment of base station communication
Figure.
Figure 27 is the stereogram according to the RF terminal devices of one side.
Figure 28 is according on one side, has the cross-sectional side view of the RF terminal devices of hot overtemperature prote fuse.
Figure 29 is according on one side, creates the cross section of the hot overtemperature prote fuse of the RF terminal devices of open electric circuit
Side view.
Figure 30 is according on one side, has the RF for the hot overtemperature prote fuse for being configured to provide monopole change function
The cross-sectional side view of terminal device.
Figure 31 is according on one side, has the RF for the hot overtemperature prote fuse for being configured to provide monopole change function
The cross-sectional side view of terminal device.
Detailed description of the invention
Some aspects and embodiment are intended to for avoiding the RF equipment mistakes from base station or other RF signal source reception signals
The RF thermal cut-ofves of heat.
According to some aspects, RF thermal cut-ofves can include main body, conducting bolt and drive mechanism.The main body can be put
In RF signal sources（Such as base station）With RF equipment（Such as antenna element）Between transmission line on（Such as coaxial cable）.Bolt can
By conductive material stroke or otherwise conductive material is included.The bolt can be placed in the main body.The bolt can have enough
Length, the bolt of " powered " conductor of transmission line is contacted with response and provides an impedance in protection point, the transmission line carries RF
Signal.Such as（But it is not limited to）The inner wire of coaxial cable.Impedance can be enough to feed back entering for the RF signals from RF signal sources
Enter at least a portion of power.It is fed back to the incident power of RF signal sources or its part is enough to cause RF signal sources to stop
RF signals are provided to RF equipment, RF equipment is protected using RF thermal cut-ofves.The drive mechanism may be in response to conductor temperature and exceed
Threshold temperature and cause threaded bolt contacts conductor.
RF thermal cut-ofves can be placed in the protection point of transmission line, and by the transmission line, RF signals are sent to shielded RF
Equipment.For example, RF thermal cut-ofves can be mounted on the outer conductor of the coaxial cable of transmission line.Base station or other RF signal sources
RF signals can be transmitted to protected RF equipment by transmission line.The non-limiting example of protected RF equipment is to be connected to base station
The point of interface of distributing antenna system or other telecommunication systems.Other non-limiting examples of protected equipment are including the use of actively
The equipment of cooling, such as fictitious load, attenuator or other equipment.Active Cooling System may include the cooling system for needing external power source
System, such as fan.If it is exposed in the case of no active cooling and/or other suitable cooling means by transmission line
Into RF power, may be damaged using the equipment of active cooling.RF thermal cut-ofves, which can respond, is located near or at protection point
Temperature exceedes the key temperatures of equipment and most of or all ingoing powers of RF signals is fed back into RF signal sources（For example, base
Stand）.
In terms of adjunctively or alternatively, RF thermal cut-ofves can respond protected RF equipment and be placed in " OFF " state and by RF
Most of or all ingoing powers of signal feed back to RF signal sources.For example, the power supply that D/C power is provided to RF equipment can be closed
Close.After power supply is closed, RF signal sources can continue to transmit RF signals to RF equipment.Power supply continues to pass to RF equipment after being closed
Defeated RF signals can cause RF apparatus overheats.RF thermal cut-ofves can be closed and the ingoing power of RF signals is anti-in response to power supply
RF signal sources are fed back to, so as to notify RF signal sources to stop sending RF signals to RF equipment.
As used herein, term " ' OFF ' state " is used to refer to wherein RF equipment and does not transmit or receive the RF of RF signals to set
Standby state.
As used herein, term " ' ON ' state " is used to refer to wherein RF equipment transmission or receives the RF equipment of RF signals
State.
During the standard operation of protected RF equipment, RF thermal cut-ofves can provide high impedance in protection point.As herein
Used, term " standard operation " is used to refer to wherein RF equipment and is in the RF equipment of " ON " state to point to running status, wherein RF
Equipment can receive and/or send RF signals.The RF thermal cut-ofves can surpass in response to being located near or at the temperature of protection point
Cross critical-temperature and provide Low ESR in protection point, so that most of ingoing power is fed back to RF signal sources.It is located at or connects
The temperature of nearly protection point can be by temperature sensor measurement.
In some respects, RF thermal cut-ofves can include the switching mechanism for being placed in the end of stub.Stub can be
Protection point is parallel-connected to shielded transmission line.Stub can physically independent switch point and protection point.Stub
（stub）There can be length N × λ/4, wherein N is integer, and λ is the wavelength of the RF signals of working frequency.Working frequency can
To be the frequency of the RF signals sent by base station or other RF signal sources by transmission line.Even number value N can provide standard operation
In open stub.Odd number value N can provide closed stub, so that the performance during standard operation in transmission line is not
It can be affected.
In a further aspect, RF thermal cut-ofves can be positioned such that, so that RF thermal cut-ofves are in protection point near zone
（That is, N=0）It is interior that short circuit is provided.For example, RF thermal cut-ofves can respond being protected by protection RF equipment in " OFF " state
Short circuit is provided in point near zone.
In some respects, RF thermal cut-ofves can be irreversible.After single incident heat excessively, irreversible RF hot melts are disconnected
Device can be replaced.In other side, RF thermal cut-ofves can be reversible.For example, after each incident heat excessively, reversible RF
The bolt of thermal cut-off can reset to the position for having no effect on RF signals along protected transmission line.
As used herein, " irreversible " finger that is used for of term crosses incident heat in response to single, and RF thermal cut-ofves be used to protect
RF equipment, wherein the RF thermal cut-ofves are replaced after incident heat is crossed.
As used herein, " reversible " finger that is used for of term crosses incident heat in response to multiple, and RF thermal cut-ofves are used to protect RF
Equipment, wherein RF thermal cut-ofves are reset after each incident heat excessively.
In extra or alternative aspect, RF equipment can include one or more hot overtemperature prote fuses.Hot overtemperature prote
Fuse may be such that including transmission line and the RF signal paths of RF equipment opening.Opening signal path can interruptive current, such as from
Electric current caused by base station or other RF signal sources to the signal of RF equipment communications.Interruptive current can prevent base station or other RF from believing
Number source provides RF power to RF equipment.RF equipment can be prevented by avoiding base station or other telecommunication apparatus from providing RF power to RF equipment
Overheating components.
It is discussed below the detailed description of these aspects and example.It is to be introduced to reader in these illustrative examples
General theme discussed here, rather than in order to limit disclosed theoretical scope.It is following section be described with reference to the drawings it is various its
His aspect and example, identical mark represents identical element in the accompanying drawings, and orientation description is exemplary for describing
Example, but illustrative examples are similar to, it should not be taken to limit the present invention.
Fig. 1-3 shows to can be used for the irreversible RF thermal cut-ofves 102 of example for preventing RF apparatus overheats in telecommunication system.
Fig. 1 is to describe to be placed in the block diagram along the RF thermal cut-ofves 102 of the transmission line between base station 104 and RF equipment 106.
Transmission line 108 can include being used in RF signal sources（Such as base station 104）The electrical communication signals between protected RF equipment 106
Any suitable transmission medium.The non-limiting example of protected RF equipment 106 includes remote antenna unit, and base station 104 is connected
It is connected to distributing antenna system or the point interface equipment of other telecommunication systems, etc..
Fig. 2 is to be placed in the cross-sectional side view along the RF thermal cut-ofves 102 of transmission line 108 in protection point 202.RF is heated
Disconnected device 102 can include bolt 206, main body 208, spring 210 and adjusting screw 214.Bolt 206, spring 210 and adjusting screw
214 can be placed in main body 208.Bolt 206 can be formed by conductive material or otherwise include conductive material, such as（But
It is not limited to）Copper.Main body 208 can be formed by any suitable rigid non-conducting material, such as（But it is not limited to）Plastics.Spring
210 can be adapted for the extension spring to the applying power of bolt 206 with the direction of the conductor 204 of transmission line 108.
Solder 212 can apply to bolt 206 to maintain bolt 206 in the position for not contacting conductor 204.Solder 212 can
With applying power, for resisting the power applied by spring 210.The fusion temperature that solder 212 can include metal or have is less than
Or other welding materials equal to threshold temperature.Threshold temperature can indicate to overheat in transmission line 108.The non-limit of fusion temperature
Qualitative example is 95-100 degrees Celsius.
RF thermal cut-ofves 102 can be positioned to as responded incident heat cause by protection transmission line 108 protection point 202
It is short-circuited.Being located near or at the temperature of RF thermal cut-ofves 102 can cause the welding material of solder 212 to melt more than threshold temperature.
Fusing solder 212 can reduce or stop the resistance of the power applied by spring 210.Reduce or stop to being applied by spring 210
The resistance of power, the conductor 204 of bolt 206 towards protected transmission line 108 can be caused to move, as shown in down arrow in Fig. 3.
The bolt 206 can connect the conductor 204 of transmission line 108.Connection with transmission line 108 can be electrically connected, and permit
Perhaps electric current is flowed through by bolt 206.Connection can provide Low ESR Z in protection point 202 parallel to protected transmission line 108L.Impedance
ZLValue can by location of short circuit with protection point distance d determine, be expressed from the next
ZL=j×Z0×tan(Θ)
Wherein Z0It is the characteristic impedance of stub, and Θ corresponds to the physical location of short circuit and protection is put between 202
Distance d electrical length.
RF signals from base station 104 or other signals source can run into impedance ZL.Running into impedance Z L can to come from RF
A part for the ingoing power of signal is fed back to base station 104 or other signals source.Base station 104 or other RF signal sources can connect
Receive the RF signals of feedback.Base station 104 or other signals source may determine that the ingoing power of feedback is sufficiently large, believe without extra RF
Number it will be sent to protected RF equipment 106.Base station 104 or other signal sources stop sending RF signals so as to protect
Protect the 106 further heating of RF equipment.
For example, short-circuit physical location and the distance between 202 d of protection point are compared with λ/4 in operating frequency wherein
The solution shown in Fig. 1-3 can be used in sufficiently small application, such as from DC to several GHz operating frequency.Protected
The RF thermal cut-ofves 102 of fusing can be replaced by using new RF thermal cut-ofves and return and operate by protecting RF equipment 106.
In other side, RF thermal cut-ofves can be reversible, as described by Fig. 4-6.Fig. 4 is that description is placed in along base station
The block diagram of the RF thermal cut-ofves 402 of transmission line between 104 and RF equipment 106.Fig. 5 is to be placed in protection point 501 along transmission
The cross-sectional side view of the RF thermal cut-ofves 402 of line 108.RF thermal cut-ofves 402 include bolt 502 and main body 504.Bolt 502
It can be placed in main body 504.Bolt 502 can form or otherwise include conductive material with conductive material.For in
The protected RF equipment 106 of " ON " state, the bolt 502 being placed in main body 504 can prevent bolt 502 from influenceing from base station 104
Or other RF signal sources send RF signals to protected RF equipment 106, as illustrated in figure 5.For being protected in " OFF " state
RF equipment is protected, bolt 502 can move towards conductor 204, as shown in the down arrow in Fig. 6.Bolt 502 contacts conductor 204
To produce short circuit, Low ESR connection is provided so as to provide to protection point 501.
The RF thermal cut-ofves 402 of N=0 can be used in low RF frequency, wherein the short-circuit thing provided by RF thermal cut-ofves 402
Manage position and protection point（As depicted in figure 6）The distance between d be less than working frequency λ/4.
In terms of adjunctively or alternatively, RF thermal cut-ofves 402 may be modified to increase working band, as described by Fig. 7-9.
Working band can be increased by using the RF thermal cut-ofves with spring 702 and metal steering ring 704, such as bolt in Fig. 7
Described by 502 side view.Spring 702 and metal steering ring 704 can be placed in main body 504, such as RF thermal cut-ofves 402 ' in Fig. 8
Cross-sectional side view described by.Spring 702 can be with applying power so that bolt 502 contacts conductor 204 and produces short circuit, such as Fig. 9
Described by middle down arrow.Metal steering ring 704 can shorten short circuit distance d so that distance d be from protection point 701 to
The distance d of metal steering ring 704.Reduce the distance the ingoing power that d can allow RF thermal cut-ofves 402 ' to feed back high-frequency signal.
The position of bolt 502 can be driven by any suitable drive mechanism.In some respects, reversible RF thermal cut-ofves
402 can include temperature sensitive drive mechanism with bolt 502.The non-limiting example of suitable drive mechanism includes making
With the bimetallic of suitable spring/anchoring mechanism, marmem（“SMA”）Spring, air pressure, wax, liquid, relay etc..
For example, RF thermal cut-off 402 of Figure 10-11 descriptions with bimetallic drive mechanism 706 ".In standard operation, such as
Shown in Figure 10, bimetallic drive mechanism 706 can be with applying power, to resist the power applied by spring 702.More than the temperature of threshold temperature
Degree can cause bimetallic drive mechanism 706 to elongate, as depicted in figure 11.The bimetallic drive mechanism 706 of elongation can be reduced
Or eliminate the resistance of the power applied by spring 702.Spring can be made by reducing or eliminating the resistance of the power applied by spring 702
702 tighten.Tightening spring 702 can cause the conductor 204 of bolt 502 towards transmission line 108 to move, such as Figure 11 down arrow institute
Description.
In other side, reversible RF thermal cut-ofves 402 can be electromagnetically actuated with bolt 502.Figure 12-13 is shown
Electromagnetically actuated RF by activating coil 708 and D/C power 710 thermal cut-off 402 " '.The non-limiting of D/C power 710 is shown
Example is the power supply of protected RF equipment 106.In standard operation, as shown in figure 12, D/C power 710 can provide power, with
Electromagnetic field is established by activating coil 708.The power applied by spring 702 can be resisted by the electromagnetic field for activating coil 708.D
C power 710 no longer provides electric power to actuating coil 708 can reduce or eliminate the magnetic field for the power that resistance is applied by spring 702.
For example, D/C power 710 can be arranged to " OFF " state in response to protected RF equipment 106 and stop providing electric power.Stop
Resisting the power applied by spring 702 can allow spring 702 to shrink.Contraction spring 702 can cause bolt 502 towards transmission line
108 conductor 204 moves, as described by down arrow in Figure 13.
In terms of adjunctively or alternatively, reversible RF thermal cut-ofves 402 can include other drive mechanisms with bolt
502.For example, drive mechanism can include the extension spring of coil and the spring for loading bolt 502.In " ON " state
Protected RF equipment 106 can supply electric current to coil, so as to cause coil to apply electromagnetic force on bolt.Electromagnetism on bolt
Power can move bolt and leave protection point, so that bolt does not influence transmission of the RF signals along protected transmission line 108.It is mobile
Bolt, which leaves protection point, can compress the extension spring of adjacent bolt 502, and suitable in the application of the direction of conductor 204 and bolt
502 relative power.Electric current to coil can be stopped by being arranged at the protected RF equipment 106 of " OFF " state, so that electric current
Stop applying the electromagnetic force to bolt 502.Spring can also extend in response to the stopping of electromagnetic force so that threaded bolt contacts by
Protect transmission line 108.
In other side, reversible RF thermal cut-ofves 402 can be by expansible gas activated, with bolt 502.
The RF thermal cut-ofves 402 " " that Figure 14-15 descriptions are activated by the expanding gas 712 included in chamber 714.In standard operation
In, as shown in figure 14, gas 712 can have sufficiently low amount, the power applied corresponding to the pressure of gas 712 to bolt 502
Less than the power applied by spring 716.Power can be applied on the direction for leaving conductor 204 by spring to bolt 502, in Figure 14
To described by upward arrow.The temperature that gas may be in response to be located near or at RF thermal cut-ofves 402 " " exceedes threshold temperature and extended.
Threshold temperature can be the temperature for indicating overheat event.The extension of gas 712 can apply enough pressure to bolt 502 so that bullet
Spring 716 compresses and the conductor 204 of bolt 502 towards transmission line 108 moves, as described by down arrow in Figure 15.Overheat thing
The stopping of part or in the absence of gas 712 can be allowed to shrink.The contraction of gas 712 can reduce the pressure for being applied to bolt 502,
So that spring 716 extends and bolt 502 leaves the conductor 204 of transmission line 108 and moved.Leave the conductor 204 of transmission line 108
Mobile bolt 502 can return to bolt the position described by Figure 14.In terms of adjunctively or alternatively, spring 716 can be with
Omit.Bolt 502 can be by technical staff or other users hand-reset to position as shown in figure 14.
For the too high higher frequency of impedance of protection point, can use has the stub of λ/4（d=λ/4）RF hot melts it is disconnected
Device, as described by Figure 16-18.Figure 16 is to describe to be placed in the RF heat along the transmission line 108 between base station 104 and RF equipment 106
Fuse 902.Figure 17 is to be placed in the cross-sectional side view along the RF thermal cut-ofves 902 of transmission line 108 in protection point 1001.RF
Thermal cut-off 902 can include bolt 1002, stub 1003 and main body 1004.Bolt 1002 and stub 1003 can be placed in
In main body 1004.Bolt 1002 and stub 1003 can be formed by conductive material or otherwise include conductive material, all
Such as（But it is not limited to）Copper.Bolt 1002 carries together with can coupling or interconnect by any suitable method with stub 1003
For the electric pathway from bolt 1002 by stub 1003, such as（But it is not limited to）Weld bolt 1002 is provided and arrives stub
1003。
The standard operation of protected RF equipment 106 can be related to RF thermal cut-ofves 902 and be short-circuited, as Figure 17 describes.Position
In or close to protection point 1001 temperature exceed threshold temperature can cause RF thermal cut-ofves 902 provide open electric circuit.Open electric circuit
It can be provided by separating bolt 1002 and stub 1003, such as being described to upward arrow in Figure 18.In certain aspects, RF heat
Fuse 902 can be irreversible.For example, weld bolt 1002 can cause RF thermal cut-ofves 902 to be to stub 1003
It is irreversible.
In certain aspects, stub 1003 can have the length of the stub of λ/4.In other side, it can use
Longer stub 1003（N≥2）.The switching function of RF thermal cut-ofves can provide open electricity with standard operation in protection point
Road.During protection, the switching function of RF thermal cut-ofves can provide short circuit.The bandwidth of operation can be reduced with the increase of N values.
The higher RF frequency of the RF signals sent by base station 104 or other RF signal sources can need the wider of RF thermal cut-ofves
Working band.Wider working band can be obtained by cascading more than one RF thermal cut-ofves 902.For example, Figure 19 is standard
During operation transmission line 108 protection point 1001a, 1001b RF temperature fuses 902a, 902B cross-sectional side view.
RF thermal cut-ofves 902a, 902b include bolt 1002a, 1002b and the cutting back being respectively placed in main body 1004a, 1004b respectively
Line 1003a, 1003b.
Figure 20 is protection point 1001a, 1001b that open electric circuit is produced in transmission line 108 RF thermal cut-off 902a,
902b cross-sectional side view.Open electric circuit in transmission line 108 can be by disconnecting bolt 1002a, 1002b and stub
1003a, 1003b and create, as in Figure 10 to described by upward arrow.RF temperature fuses 902a's, 902b can each have
Each stub 1003a, 1003b different length dStub, i.For example, it is d that thermal cut-off 902a, which has length,Stub,aCutting back
Line 1003a, different from thermal cut-off 902b stub 1003b length dStub, b.Cascading RF thermal cut-ofves 902a, 902b can
To be positioned at mutual distance dFuse.It is d in mutual distanceFusePositioning RF thermal cut-ofves 902a, 902b can provide wider adjustable
Whole working band, the RF equipment 106 of RF signals is received for protecting.
Another non-limiting example of RF thermal cut-ofves has the reversible function in higher frequency, as retouched in Figure 21-23
State.Figure 21 is the block diagram that description is placed in the RF thermal cut-ofves 1302 along the transmission line 108 between base station 104 and RF equipment 106.
Figure 22 is to be placed in the cross-sectional side view along the RF thermal cut-ofves 1302 of transmission line 108 in protection point 1401.RF thermal cut-ofves
1302 include bolt 1402, bolt expander 1403, main body 1404 and dielectric material 1406.Bolt 1402, bolt expander
1403 and dielectric material 1406 may be provided in main body 1404.Dielectric material 1406 can be placed in bolt 1402 and bolt expander
Between 1403.For the protected RF equipment in " ON " state, bolt 1402, bolt expander 1403 and dielectric material 1406
It can be positioned, will not be by shadow so that sending RF signals to protected RF equipment 106 from base station 104 or other RF signal sources
Ring.The temperature that bolt 1402, bolt expander 1403 and dielectric material 1406 may be in response to protection point 1401 exceedes threshold temperature
And conductor 204 is turned to, as described by down arrow in Figure 23.Bolt 1402 can contact conductor 204.Bolt 1402 contacts conductor
204 can cause the short circuit from the open electric circuit provided to dielectric material 1406 of protection point 1401.From protection point 1401 to open electricity
The short circuit on road can have the length of λ/4 in the operating frequency of transmission RF signals.
The wider working frequency range of RF thermal cut-ofves can be needed in higher RF frequency.By cascading more than one RF hot melts
Disconnected device 1302 can obtain broader working band, as described by Figure 24-25.Figure 24 is protecting point 1401a during being standard operation,
1401b RF thermal cut-ofves 1302a, 1302b cross-sectional side view.RF thermal cut-ofves 1302a, 1302b include difference respectively
The bolt 1402a, 1402b, bolt expander 1403a, 1403b, dielectric material 1406a being arranged in main body 1404a, 1404b,
1406b.Figure 25 is the side that protection the point 1401a, 1401b of short circuit RF thermal cut-ofves 1302a, 1302b are produced in transmission line 108
Sectional view.Short circuit in transmission line 108 can be established by bolt 1402a, the conductor 204 of 1402b contact transmission lines 108, such as
In Figure 25 described by down arrow.RF thermal cut-ofves 1302a, 1302b can have the different length d of each boltBolt,i.Such as
Shown in Figure 25, it is d that thermal cut-off 1302a, which has length,Bolt,aBolt 1402a, different from thermal cut-off 1302b bolt
1402b length dBolt,b.Cascade RF thermal cut-ofves 1302a, 1302b can be positioned at mutual distance dFuse.In mutual distance
dFusePositioning RF thermal cut-ofves 1302a, 1302b can provide broader adjustable working band, and RF signals are received for protecting
RF equipment 106.
In terms of adjunctively or alternatively, additional overtemperature protection can be protected by the hot overtemperature of RF terminal devices in telecommunication system
Fuse is protected to provide.Hot overtemperature prote fuse can cause the signal path in telecommunication system（Such as RF signal paths）Open.
Opening signal path can interruptive current flow through signal path, such as electricity caused by the signal to communicate from base station or other telecommunication apparatus
Stream.Interruptive current can prevent base station 104 or other signals source from providing RF power, the RF terminal devices bag to RF terminal devices
Include hot overtemperature prote fuse.
For example, RF terminal devices can be included in protected RF equipment 106.Figure 26 is to include RF terminal devices 1502
RF equipment 106 block diagram.The non-limiting example of RF equipment 106 is base station router or other point of interface system or equipments.
The RF equipment 106 can be placed in separation/composite module 1501 therein including RF terminal devices 1502.RF terminal devices 1502
It can prevent base station 104 and/or another RF signal sources from providing RF power to RF equipment 106.Prevent base station 104 or other RF signals
Source provides RF power to RF terminal devices can prevent the overheating components of protected RF equipment 106.
Figure 27 is the perspective view of example RF terminal devices 1502.RF terminal devices 1502（It is convex described in such as Figure 27
Edge installing terminal equipment）Wire 1504 can be included.The example of flange installing terminal equipment is that the flange terminals of K100N50X4 half are set
It is standby.RF terminal devices 1502 can be by wire 1504 from base station 104 or other telecommunication apparatus（Such as RF equipment 106）Receive.
Wire 1504 can be formed by any suitable conductive material, such as（But it is not limited to）Copper or copper alloy.
Figure 28 shows the example of the RF terminal devices 1602 with hot overtemperature prote fuse 1604.RF terminal devices
1602 can be coupled to the lead of printed circuit board (PCB) 1606 by hot overtemperature prote fuse 1604, or otherwise pass through heat
Overtemperature prote fuse 1604 is coupled to telecommunication apparatus.Hot overtemperature prote fuse 1604 can be coupled to printing by solder joint 1608
The wire of circuit board 1606.
Hot overtemperature prote fuse 1604 can couple the component of a telecommunication apparatus, so that hot overtemperature prote fuse
1604 tension force applying power.The power applied by the tension force of hot overtemperature prote fuse 1604 can be resisted by Coupling Thermal overtemperature prote
The power that fuse 1604 is applied to printed circuit board (PCB) 1606.For example, as shown in figure 28, hot overtemperature prote fuse 1604 can be with
Shape with bending, so that hot overtemperature prote fuse 1604 has spring function.Hot overtemperature prote fuse 1604 can
To be coupled to printed circuit board (PCB) 1606 by solder joint 1608.The curved shape of hot overtemperature prote fuse 1604 can cause application
Power, to resist the power for the solder joint 1608 that hot overtemperature prote fuse 1604 is coupled to printed circuit board (PCB) 1606.
The power for stopping being applied by solder joint 1608 can cause hot overtemperature prote fuse 1604 to stop contacting printed circuit board (PCB)
1606, so as to open the signal path interrupted by RF terminal devices 1602.The power for stopping being applied by solder joint 1608 can pass through example
As having the printed circuit board 1606 for the temperature for being sufficient so that the fusing of solder joint 1608 to cause.For example, Figure 29 descriptions connect with stopping
Touch the RF terminal devices 1602 of the hot overtemperature prote fuse 1604 of printed circuit board 1606.Printed circuit board (PCB) 1606 can have
The sufficiently high temperature of solder joint 1608 is melted, so as to remove the power applied by solder joint 1608.By hot overtemperature prote fuse 1604
Power caused by shape can cause hot overtemperature prote fuse 1604 no longer to contact printed circuit board (PCB) 1606, be provided with so as to open
The signal path of printed circuit board (PCB) 1606.
Base station 104 or other RF signal sources can provide signal to signal path, and the signal path is protected by hot overtemperature
Shield fuse 1604 is opened.Off line in signal path shortage can be caused by the hot opening signal path of overtemperature prote fuse 1604
System.Uninterrupted signal path can cause by base station 104 or other RF signal sources offer signal feed back to base station 104 or other
RF signal sources.Feeding back to the signal of base station 104 or other RF signal sources can cause base station 104 or other RF signal sources to stop to letter
Number path provides signal, and the signal path is opened by hot overtemperature prote fuse 1604.For example, receive the base station of feedback signal
104 can be configured to terminate operation in response to receiving feedback signal.
Hot overtemperature prote fuse 1604 can be formed by conductive material.The conductive material can have hot overtemperature prote to melt
The sufficient intensity that disconnected device 1604 is not destroyed or otherwise destroyed by the power of the power of confrontation solder joint 1608.The conductive material
Example may include（But it is not limited to）Beryllium copper.Other examples include copper alloy.The copper alloy can include copper（It provides conductive
Property）And one or more other elements, the other elements provide enough durability to prevent hot overtemperature prote fuse
1604 are destroyed or are otherwise damaged by the resistance of the power of solder joint 1608.
Although hot overtemperature prote fuse 1604 such as Figure 28 and 29 is described to have curved shape, other embodiment is also
It is possible.For example, hot overtemperature prote fuse 1604 can have flat shape, and to be set with printed circuit board (PCB) 1606 or telecommunications
Standby other assemblies are angularly oriented.Hot overtemperature prote fuse 1604 can be by applying to hot overtemperature prote fuse 1604
Power and be coupled to printed circuit board (PCB) 1606 or other assemblies.The power applied may be such that the hot contact of overtemperature prote fuse 1604 print
Printed circuit board 1606 or other assemblies.Power can be applied by such as solder joint 1608 or otherwise be caused, the solder joint 1608
Hot overtemperature prote fuse 1604 is kept in the position of contact printed circuit board 1606.Hot overtemperature prote fuse 1604 can be by
Material with tension force is formed, the power that the tension force confrontation is applied by solder joint 1608.In the power not applied by solder joint 1608
In the case of, hot overtemperature prote fuse 1604 may return to hot overtemperature prote fuse 1604 and not contact printed circuit board (PCB) 1606
Initial orientation angle.
Solder joint 1608 can be formed by any conductive material with sufficiently low fusing point.For example, the component of telecommunication apparatus
It can be operated in up to 150 degrees Celsius of temperature.The performance of component can by the range of 150 degree to 250 degree temperature degenerate or
Upset.Solder joint 1608 can be formed by conductive material of the fusing point in the range of 150 degree to 250 degree.Solder joint 1608 can be by melting
Conductive material o'clock more than 250 degree is formed.It is Wood's metal to form the example of the material of solder joint 160 from it.Solder joint 1608 can be with
Welded by craft or machine.
In certain aspects, the conductive material of solder joint 1608 can have the fusing point in threshold temperature, the threshold temperature
The threshold temperature of RF thermal cut-ofves 108 with being placed in along transmission line 108 is identical.In other side, the conduction of solder joint 1608
Material can have the fusing point of the threshold temperature of threshold temperatures different from RF thermal cut-ofves 102.
In terms of adjunctively or alternatively, hot overtemperature prote fuse can be configured to provide monopole change-over switch function.Example
Such as, as described by Figure 30-31, the RF terminal devices 1702 with hot overtemperature prote fuse 1704 can provide wire 1706a,
Monopole conversion handoff functionality between 1706b.Lead wire 1706a can be electrically connected to one or more RF apparatus assemblies
1712.Wire 1706b can be electrically connected to apartment warning 1710.The non-limiting example of apartment warning 1710 can include
Launch equipment, the transmitting equipment is configured to respond the electric current for flowing to transmission equipment or communication is sent out to the signal of transmission equipment
Deliver newspaper alert or other message.In certain aspects, apartment warning 1710 can be coupled to transmission line 108, and can pass through biography
The defeated communication of line 108 warning or other message, as described by Figure 30.In other side, apartment warning 1710 can include wireless
Equipment is sent, it is configured to wireless mode broadcast or otherwise transmission alarm or other message.
In normal operating, the hot overtemperature prote fuse 1704 of RF terminal devices 1702 can be coupled by solder joint 1708
To lead 1706a.The shape of hot overtemperature prote fuse 1704 can cause applying power, to resist hot overtemperature prote fuse
1704 are coupled to the power of wire 1706a solder joint 1708.Electric current can flow and/or signal can communicate from transmission line 108 to
One or more RF apparatus assemblies 1712.
Cross the sufficiently high temperature that incident heat can cause wire 1706a to have fusing solder joint 1708.With being enough to make weldering
The wire 1706a of the temperature of the fusing of point 1708 may be such that solder joint 1708 stops applying power.Stopping power that solder joint 1708 applies can be with
So that hot overtemperature prote fuse 1704 stops contact wire 1706a.As caused by the shape of hot overtemperature prote fuse 1704
Power can cause the hot contact wire 1706b of overtemperature prote fuse 1704, as in Figure 31 to described by upward arrow.Hot overtemperature prote
The contact wire 1706b of fuse 1704 can allow electric current to flow to apartment warning 1710 and/or signal to be sent to from transmission line 108
Apartment warning 1710.Electric current flows to warning device 1710 and/or signal communication can trigger apartment warning to apartment warning 1710
1710 alert message：Overheat condition has occurred and that.RF terminal devices 1702 can be identified from the warning of apartment warning 1710
Position, and determine the hot normal operating of overtemperature prote fuse 1704 switching.
Although Figure 30-31 describes single RF terminal devices 1702, single hot overtemperature prote fuse 1704 and single alarm
Equipment 1710, other embodiments are also possible.In terms of adjunctively or alternatively, multiple RF terminal devices 1702 it is multiple
Apartment warning 1710 can be used for multiple positions of the mark in RF equipment 106 and/or in the telecommunication system with multiple RF equipment 106
Multiple incident heats of crossing are put to have occurred.
The above description of the aspect and feature of the present invention has been proposed（Example including diagram）It is merely to illustrate and retouches
The purpose stated, it is not intended that exhaustion limits the invention to disclosed precise forms.The scope of the present invention is not being departed from
In the case of, a variety of modifications, change and they purposes it will be apparent to those skilled in the art that.From each example
Disclosed aspect and feature can combine any other example.Above-mentioned illustrative examples are presented to be introduced herein to reader
The general theme discussed, rather than in order to limit disclosed theoretical scope.
Claims (21)
1. a kind of RF thermal cut-ofves, including：
The main body being placed on the transmission line between RF signal sources and RF equipment；
The conducting bolt being placed in the main body, the conducting bolt have enough length to respond the conducting bolt and institute
The contact of the energized conductor of transmission line is stated and the protection point in the transmission line provides impedance, wherein the impedance is configured to instead
Present a part for the input power of the RF signals from the RF signal sources；And
Drive mechanism, it is configured to response and is located near or at the temperature of protection point more than threshold temperature and so that the conducting bolt
Contact the energized conductor.
2. RF thermal cut-ofves as claimed in claim 1, wherein the drive mechanism is irreversible.
3. RF thermal cut-ofves as claimed in claim 2, wherein the drive mechanism includes：
Suitable for the spring in the direction towards the energized conductor to the conducting bolt applying power；And
The solder of the power of the conducting bolt is applied to suitable for resistance, wherein the solder is equal to the threshold value including melting temperature
The welding material of temperature.
4. RF thermal cut-ofves as claimed in claim 1, wherein the drive mechanism is reversible.
5. RF thermal cut-ofves as claimed in claim 4, wherein the drive mechanism includes bimetallic drive mechanism.
6. RF thermal cut-ofves as claimed in claim 4, wherein the drive mechanism includes the chamber of confining gas or liquid, its
Described in gas or liquid be distensible so that the gas or liquid respond the threshold temperature to the conducting bolt
Applying power.
7. RF thermal cut-ofves as claimed in claim 4, wherein the drive mechanism includes electromagnet, the electromagnet is configured
To resist the power applied from spring in the direction towards energized conductor to the conducting bolt, the electromagnet is configured to respond
Electric current is received from the RF equipment and resist the power in the electromagnet.
8. RF thermal cut-ofves as claimed in claim 4, wherein the drive mechanism includes shape memory alloy spring mechanism.
9. RF thermal cut-ofves as claimed in claim 1, further comprise the dielectric material for being placed in the first end of the conducting bolt
Material, the first end of the conducting bolt is relative with the second end of the conducting bolt, and the second end of the conducting bolt is suitable to connect
Touch the energized conductor.
10. a kind of thermal protection system, including：
Multiple RF thermal cut-ofves, each RF thermal cut-ofves include：
The main body being placed on the transmission line between RF signal sources and RF equipment；
The conducting bolt being placed in the main body, the conducting bolt have enough length to respond the conducting bolt and institute
State the contact of the energized conductor of transmission line and the protection point in the transmission line provides impedance；And
Drive mechanism, it is configured to response and is located near or at the temperature of protection point more than threshold temperature and so that the conducting bolt
Contact the energized conductor；
Wherein, the multiple RF thermal cut-ofves compartment of terrain is arranged on the transmission line, so that the multiple RF thermal cut-ofves provide
Combined impedance, the combined impedance are suitable to one of the ingoing power of RF signals in predetermined frequency band of the feedback from the RF signal sources
Part.
11. thermal protection system as claimed in claim 10, wherein at least one of described RF thermal cut-ofves, the driving
Mechanism is irreversible.
12. thermal protection system as claimed in claim 11, wherein the drive mechanism includes：
Suitable for the spring in the direction towards the energized conductor to the conducting bolt applying power；And
The solder of the power of the conducting bolt is applied to suitable for resistance, wherein the solder is equal to the threshold value including melting temperature
The welding material of temperature.
13. thermal protection system as claimed in claim 10, wherein at least one described in the multiple RF thermal cut-ofves
Drive mechanism is reversible.
14. thermal protection system as claimed in claim 13, wherein the drive mechanism includes bimetallic drive mechanism.
15. thermal protection system as claimed in claim 13, wherein the drive mechanism includes the chamber of confining gas or liquid,
Wherein described gas or liquid are expansible, so that the gas or liquid are led in response to the threshold temperature to described
Electric bolt applying power.
16. thermal protection system as claimed in claim 13, wherein the drive mechanism includes electromagnet, the electromagnet is through matching somebody with somebody
Put to resist the power applied from spring in the direction towards energized conductor to the conducting bolt, the electromagnet is configured to ring
Electromagnet described in Ying Yu receives electric current from the RF equipment and resists the power.
17. thermal protection system as claimed in claim 13, wherein the drive mechanism includes shape memory alloy spring mechanism.
18. thermal protection system as claimed in claim 10, wherein each of the multiple RF thermal cut-ofves further comprises
It is placed in the dielectric material of the first end of the conducting bolt, the first end of the conducting bolt and the second end of the conducting bolt
Relatively, the second end of the conducting bolt is adapted for contact with the energized conductor.
19. a kind of thermal protection system, including：
Pass through transmission line and the RF equipment of RF signal sources traffics；
The RF thermal cut-ofves being placed on the transmission line, the RF thermal cut-ofves include：
The main body being placed on the transmission line between RF signal sources and RF equipment；
The conducting bolt being placed in the main body, the conducting bolt have enough length to respond the conducting bolt and institute
The contact of the energized conductor of transmission line is stated and the protection point in the transmission line provides impedance, wherein the impedance is configured to instead
Present a part for the input power of the RF signals from the RF signal sources；And
Drive mechanism, it is configured to response and is located near or at the temperature of protection point more than threshold temperature and so that the conducting bolt
Contact the energized conductor.
20. thermal protection system as claimed in claim 19, wherein the RF equipment includes being coupled at least one of RF equipment
The hot overtemperature prote fuse of component, wherein by least one component from transmission line to the hot overtemperature prote fuse
Signal path is provided, wherein the temperature that the hot overtemperature prote fuse is configured to respond at least one component exceedes threshold
Value temperature and disconnect the signal path.
21. thermal protection system as claimed in claim 20, wherein the hot overtemperature prote fuse includes being suitable to the heat
Overtemperature prote fuse is connected to the welding material of at least one component, wherein the melting temperature of the welding material is less than
Or equal to the threshold temperature.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261711350P | 2012-10-09 | 2012-10-09 | |
| US61/711,350 | 2012-10-09 | ||
| US13/869,653 | 2013-04-24 | ||
| US13/869,653 US9443683B2 (en) | 2012-04-24 | 2013-04-24 | RF thermal fuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103715011A CN103715011A (en) | 2014-04-09 |
| CN103715011B true CN103715011B (en) | 2017-11-28 |
Family
ID=49304820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310465703.7A Active CN103715011B (en) | 2012-10-09 | 2013-10-09 | RF thermal cut-ofves |
Country Status (2)
| Country | Link |
|---|---|
| EP (2) | EP2930733A1 (en) |
| CN (1) | CN103715011B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CL2016001392A1 (en) * | 2016-06-07 | 2016-12-30 | Infante Raúl Dominguez | Electrical disconnection protection device that acts in the presence of excessive current circulation that may occur in a coaxial cable that connects the decoficator with the antenna, which provides cable tv service in a residence |
| CN110838396B (en) * | 2019-12-04 | 2022-05-20 | 湖南省安能电子有限公司 | Magnetic power-off fuse resistor |
| CN111128595B (en) * | 2019-12-31 | 2022-06-07 | 宁波军鸽防务科技有限公司 | Control switch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2886744A (en) * | 1956-03-21 | 1959-05-12 | Jr William E Mcnatt | Electrical protective apparatus |
| CN2126748Y (en) * | 1992-07-04 | 1993-02-03 | 陈明掌 | Plug-in sheet type fuse device |
| CN101647080A (en) * | 2007-03-26 | 2010-02-10 | 罗伯特.博世有限公司 | Thermal fuse for use in electric modules |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29605370U1 (en) * | 1996-03-22 | 1996-05-30 | Driescher Spezialfab Fritz | High voltage high power fuse |
| JP2007089054A (en) * | 2005-09-26 | 2007-04-05 | Nippon Telegr & Teleph Corp <Ntt> | Antenna of rfid tag |
| WO2007095873A1 (en) * | 2006-02-23 | 2007-08-30 | Siemens Aktiengesellschaft | Device for short-circuiting power semiconductor modules |
-
2013
- 2013-10-09 EP EP15166240.0A patent/EP2930733A1/en not_active Withdrawn
- 2013-10-09 EP EP13187898.5A patent/EP2720246B1/en active Active
- 2013-10-09 CN CN201310465703.7A patent/CN103715011B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2886744A (en) * | 1956-03-21 | 1959-05-12 | Jr William E Mcnatt | Electrical protective apparatus |
| CN2126748Y (en) * | 1992-07-04 | 1993-02-03 | 陈明掌 | Plug-in sheet type fuse device |
| CN101647080A (en) * | 2007-03-26 | 2010-02-10 | 罗伯特.博世有限公司 | Thermal fuse for use in electric modules |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103715011A (en) | 2014-04-09 |
| EP2930733A1 (en) | 2015-10-14 |
| EP2720246A1 (en) | 2014-04-16 |
| EP2720246B1 (en) | 2015-07-08 |
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