CN118101095B - Double-sided coplanar waveguide chip type coaxial thermistor type power seat - Google Patents
Double-sided coplanar waveguide chip type coaxial thermistor type power seatInfo
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- CN118101095B CN118101095B CN202410487946.9A CN202410487946A CN118101095B CN 118101095 B CN118101095 B CN 118101095B CN 202410487946 A CN202410487946 A CN 202410487946A CN 118101095 B CN118101095 B CN 118101095B
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- 238000012545 processing Methods 0.000 claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 26
- 239000004020 conductor Substances 0.000 claims description 37
- 238000009413 insulation Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
Abstract
The double-sided coplanar waveguide chip type coaxial thermistor type power seat comprises a radio frequency signal receiving unit, a radio frequency signal processing unit and an electric signal output unit which are sequentially connected; the radio frequency signal receiving unit receives the microwave signal and outputs the microwave signal to the radio frequency signal processing unit for processing; the radio frequency signal processing unit comprises a core thermistor load seat and a circuit board; the core thermistor load seat comprises a metal cavity and a coaxial waveguide transition structure, wherein the coaxial waveguide transition structure comprises an elastic connecting piece for adjusting the position of the double-sided coplanar waveguide chip; after the microwave signals are processed by the double-sided coplanar waveguide chip, the microwave signals are converted into electric signals through the circuit board and output; the electric signal output unit receives the electric signal output by the radio frequency signal processing unit and outputs a numerical value. The invention can realize the measurement of microwave power with the maximum frequency of more than 110GHz, and realize the best matching with the maximum frequency of more than 50GHz through an adjustable elastic connecting piece, a coaxial waveguide transition structure and the like.
Description
Technical Field
The invention relates to a double-sided coplanar waveguide chip coaxial thermistor type power seat, in particular to a double-sided coplanar waveguide chip coaxial thermistor type power seat with an adjustable elastic connecting piece.
Background
The single-sided coplanar waveguide sheet structure is similar to a microstrip line, and is distinguished in that the coplanar waveguide has a smaller physical size, impedance adjustment is mainly realized through the interval between the top-layer ground and the central conductor, the interval is generally smaller than the microstrip line, and when the interval is large enough, the coplanar waveguide with the grounded back surface is equivalent to the microstrip line. Meanwhile, the working efficiency of the microstrip line and the strip line in the frequency band of 30GHz and above is reduced, and the loss is increased; compared with a grounded coplanar waveguide, the coplanar waveguide structure has a firm grounding structure, and has lower loss and stability in a high-frequency band from above 30GHz to above 110 GHz.
The form of the thermistor power holder is limited by structural dimensions and processing capabilities, and is generally operated at frequencies below 30GHz and is no longer suitable for measuring microwave signals operating to 40 GHz.
Accordingly, the problems of the prior art are to be further improved and developed.
Disclosure of Invention
(One) object of the invention: to solve the above-mentioned problems in the prior art, it is an object of the present invention to provide a dual-sided coplanar waveguide chip coaxial thermistor power base with adjustable elastic connection that can achieve better matching and wider bandwidth.
(II) technical scheme: in order to solve the technical problems, the double-sided coplanar waveguide chip coaxial thermistor type power seat provided by the technical scheme comprises a radio frequency signal receiving unit, a radio frequency signal processing unit and an electric signal output unit which are sequentially connected; the radio frequency signal receiving unit receives an external microwave signal and outputs the microwave signal to the radio frequency signal processing unit for data processing;
The radio frequency signal processing unit comprises a core thermistor load seat and a circuit board; the core thermistor load seat comprises a metal cavity and a coaxial waveguide transition structure, wherein the coaxial waveguide transition structure comprises an elastic connecting piece for adjusting the position of the double-sided coplanar waveguide chip; the double-sided coplanar waveguide chip processes the microwave signals received by the radio frequency signal receiving unit and then converts the microwave signals into electric signals through the circuit board to be output;
The electric signal output unit receives the electric signal output by the radio frequency signal processing unit and outputs the electric signal as a numerical value.
The radio frequency signal processing unit further comprises a heat insulation structure for bearing the core thermistor load seat and the circuit board, and a second adapter connected with the core thermistor load seat; the heat preservation structure comprises a front cover plate, a rear cover plate and a cylinder body.
The radio frequency signal receiving unit comprises a radio frequency connector and a first adapter connected with the radio frequency signal processing unit; the first adapter is connected with the straight-blocking device, and the straight-blocking device is connected with the second adapter to shield direct current signals.
The metal cavity comprises a first cavity and a second cavity; the inner surface of one end of the second cavity close to the coaxial waveguide transition structure is provided with a groove, and the size of the groove is matched with that of the double-sided coplanar waveguide chip;
The first cavity and the second cavity are provided with cavities at one ends far away from the coaxial waveguide transition structure, and the cavities are flush from one ends of the first cavity and/or the second cavity far away from the coaxial waveguide transition structure to the side edges of the grooves where the double-sided coplanar waveguide chips are placed.
The coaxial waveguide transition structure comprises a first cavity, a second cavity, a first cavity and a second cavity, wherein a gap is formed at the joint of the first cavity and the second cavity, and a gap matched with the gap is formed in the coaxial waveguide transition structure; the gap coincides with a straight line where the first elastic connecting piece and the second elastic connecting piece are located;
the thickness of the gap is equal to that of the coplanar waveguide chip, and the depth is 0.2mm; and the double-sided coplanar waveguide chip and the core thermistor load seat are perfectly contacted, so that step compensation is realized.
The coaxial waveguide transition structure is characterized in that a cylindrical inner conductor is arranged in the center of the coaxial waveguide transition structure, and adjustable elastic connecting pieces are arranged in the coaxial waveguide transition structure and the second cavity.
The adjustable elastic connecting pieces comprise first elastic connecting pieces and second elastic connecting pieces which are arranged at two sides of the inner conductor of the coaxial waveguide transition structure at equal intervals;
The adjustable elastic connecting piece further comprises a third elastic connecting piece, a fourth elastic connecting piece, a fifth elastic connecting piece and a sixth elastic connecting piece which are arranged in the second cavity; the third elastic connecting piece and the fourth elastic connecting piece are symmetrically arranged along the central axis where the inner conductor is located and are arranged at one side far away from the coaxial waveguide transition structure; the fifth elastic connecting piece and the sixth elastic connecting piece are also symmetrical along the central axis where the inner conductor is located, and are arranged on the inner side wall near one end of the coaxial waveguide transition structure.
The first elastic connecting piece and the second elastic connecting piece have the same structure, a first cylindrical small block and a first spring tube are sequentially arranged from one end, close to a metal cavity formed by the first cavity and the second cavity, to one end, far away from the metal cavity, of the metal cavity, and the first cylindrical small block protrudes out of the coaxial waveguide transition structure;
The third elastic connecting piece, the fourth elastic connecting piece, the fifth elastic connecting piece and the sixth elastic connecting piece are identical in structure, and a first small screw, a second spring tube and a second cylindrical small block are sequentially arranged from the inner wall of the second cavity to the direction of the inner space of the formed metal cavity.
The first cylindrical small block and the second cylindrical small block are equal in size and dimension, and the diameters of the first cylindrical small block and the second cylindrical small block are larger than the thickness of the coplanar waveguide chip; the difference between the diameters of the first cylindrical small block and the second cylindrical small block and the thickness of the coplanar waveguide chip is less than or equal to 0.5mm.
The diameter of the inner conductor of the coaxial waveguide transition structure is smaller than the width of the coplanar waveguide termination of the double-sided coplanar waveguide chip, and the diameter difference between the inner conductor and the central conductor is smaller than 0.2mm; and the first coplanar waveguide surface and the second coplanar waveguide surface are symmetrically arranged relative to the inner conductor, the depth of a gap of a coaxial waveguide transition structure embedded in the double-sided coplanar waveguide chip is adjusted, the transition between the coaxial waveguide and the waveguide is realized, and the compensation step design is carried out at the joint of the inner conductor and the coplanar waveguide, so that the bandwidth matching is realized.
The beneficial effects are that: the invention provides a double-sided coplanar waveguide chip coaxial thermistor type power seat, which is characterized in that an elastic connecting piece is designed for preventing the double-sided coplanar waveguide chip from being different in axis due to too small size in the assembly process, and the optimal matching performance is realized by adjusting the screwing depth of the elastic connecting piece in the assembly process; the movement of the double-sided coplanar waveguide chip in the transverse direction and the radial direction is realized by adjusting the tightness of the elastic connecting piece, so that the adjustment of the axial center position of the double-sided coplanar waveguide chip is realized; secondly, a novel symmetrical double-sided coplanar waveguide chip type structure is adopted, so that better matching and wider bandwidth are realized; finally, the microwave power measurement with the maximum frequency of more than 110GHz can be realized, and the best matching with the maximum frequency of more than 50GHz is realized through an adjustable elastic connecting piece, a coaxial waveguide transition structure and the like.
Drawings
FIG. 1 is a system block diagram of a dual-sided coplanar waveguide chip coaxial thermistor type power pad of the present invention;
FIG. 2 is a schematic structural view of embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of the load carrier of the core thermistor according to embodiment 1 of the present invention;
FIG. 4 is a cross-sectional view of the load carrier of the core thermistor according to embodiment 1 of the present invention along the junction of the first cavity and the second cavity;
Fig. 5 is a schematic structural view of a coaxial waveguide transition structure of embodiment 1 of the present invention;
FIG. 6 is a cross-sectional view of the load carrier of the core thermistor according to embodiment 1 of the present invention along a direction perpendicular to the junction of the first cavity and the second cavity;
Fig. 7 is a schematic structural view of embodiment 2 of the present invention.
Description of the drawings: 1-radio frequency connector, 2-front cover plate, 3-core thermistor load seat, 4-heat insulation structure, 5-circuit board, 6-back cover plate, 7-connector, 8-first cavity, 9-second cavity, 10-coaxial waveguide transition structure, 11-double-sided coplanar waveguide chip, 12-first elastic connector, 121-second elastic connector, 13-gap, 14-inner conductor, 15-center conductor, 16-fifth elastic connector, 161-sixth elastic connector, 17-third elastic connector, 171-fourth elastic connector, 18-second adapter, 19-straight-stop, 20-first coplanar waveguide surface, 21-second coplanar waveguide surface.
Detailed Description
The present invention will be described in further detail with reference to the preferred embodiments, and more details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent that the present invention can be embodied in many other forms than described herein, and that those skilled in the art will be able to make similar generalizations and deductions depending on the actual application without departing from the spirit of the present invention, and therefore should not be limited in scope by the context of this particular embodiment.
The drawings are schematic representations of embodiments of the invention, it being noted that the drawings are by way of example only and are not drawn to scale and should not be taken as limiting the true scope of the invention.
The double-sided coplanar waveguide chip type coaxial thermistor type power seat, as shown in fig. 1, comprises a radio frequency signal receiving unit, a radio frequency signal processing unit and an electric signal output unit which are sequentially connected. The radio frequency signal receiving unit receives an external microwave signal and outputs the microwave signal to the radio frequency signal processing unit for data processing. The radio frequency signal processing unit processes the microwave signal received by the radio frequency signal receiving unit and converts the microwave signal into an electric signal to be output. The electric signal output unit receives the electric signal output by the radio frequency signal processing unit and outputs the electric signal as a numerical value.
The following detailed description describes preferred embodiments in connection with the accompanying drawings:
Example 1:
As shown in fig. 2, the radio frequency signal receiving unit comprises a radio frequency connector 1 with the diameter of 2.4mm and a first adapter connected with the radio frequency signal processing unit. The radio frequency signal processing unit comprises a core thermistor load seat 3, a circuit board 5 and a heat insulation structure 4 for bearing the core thermistor load seat 3 and the circuit board 5; the core thermistor load seat 3 comprises a metal cavity formed by a first cavity 8 and a second cavity 9, a coaxial waveguide transition structure 10 and a second adapter. The electrical signal output unit comprises a connector 7.
The heat insulation structure 4 comprises a front cover plate 2, a rear cover plate 6 and a cylinder body, and forms an internal heat insulation cylinder structure. The radio frequency connector 1 is fixed on the front cover plate 2, is completely screwed into the second adapter through the first adapter to be fixed, is connected with the core thermistor load seat 3, and transmits microwave signals acquired by the radio frequency connector 1 to the core thermistor load seat 3 for processing. The connector 7 is fixed on the rear cover plate 6, the circuit board 5 is inserted on a needle-shaped carrier on the connector 7, and the electric connection relation between the circuit board 5 and the connector 7 is realized, so that data communication and input and output of voltage and resistance signals are realized.
More preferably, a sheath which is favorable for screwing is arranged on the outer surface of the radio frequency connector 1, so that the precise connection between the double-sided coplanar waveguide chip type coaxial thermistor type power seat and equipment is ensured. The first adapter and the second adapter are both standard sizes of 2.4 mm. The cylinder body is made of plastic, the front cover plate 2 and the rear cover plate 6 are made of stainless steel, the stainless steel and the plastic are hot bad conductors, and the cylinder body, the front cover plate 2 and the rear cover plate 6 form a cylinder-shaped heat insulation structure 4 which fixes the core thermistor load seat 3 and the circuit board 5 inside, so that internal and external thermal insulation and internal constant temperature can be effectively realized.
The circuit board 5 processes working DC bias input signals, compensation DC bias input signals, temperature measurement output signals, heating input signals and the like led out by the thermistor load seat. The connector 7 is cylindrical, a needle-shaped connecting end is arranged on one side close to the circuit board 5, and the circular surface of the circuit board 5 is inserted into the needle-shaped connecting end, so that the circuit board 5 can be fixed, and meanwhile, data communication between the circuit board 5 and the connector 7 is facilitated.
As shown in fig. 3, the core thermistor load holder 3 includes a metal cavity formed by a first cavity 8 and a second cavity 9, and a coaxial waveguide transition structure 10. Screw holes are correspondingly formed in the first cavity 8 and the second cavity 9, and the first cavity 8 and the second cavity 9 are combined through screws to form a cylindrical metal cavity with large heat capacity. And the metal cavity is provided with a fixing device at one end far away from the coaxial waveguide transition structure 10, and a fixing structure matched with the fixing device is arranged in the heat insulation structure 4, so that the core thermistor load seat 3 and the heat insulation structure 4 can be fixed into a whole, and displacement is avoided, so that the use of the invention is influenced. The metal cavity forms a space for placing the double-sided coplanar waveguide chip 11, and two sides of the double-sided coplanar waveguide chip 11 are respectively contacted with the first cavity 8 and the second cavity 9.
The second cavity 9 is provided with a groove on the inner surface of one end close to the coaxial waveguide transition structure 10, the size of the groove is matched with that of the double-sided coplanar waveguide chip 11, the double-sided coplanar waveguide chip 11 can be completely accommodated, and when the first cavity 8 is fixedly connected with the second cavity 9, the double-sided coplanar waveguide chip 11 is fixedly pressed by the first cavity 8. The first cavity 8 and the second cavity 9 are provided with a cavity at one end far away from the coaxial waveguide transition structure 10, and the cavity is flush from one end of the first cavity 8 and/or the second cavity 9 far away from the coaxial waveguide transition structure 10 to the side edge of the groove for placing the double-sided coplanar waveguide chip 11, and leads out the wires electrically connected with the circuit board 5 through the cavity.
The cavity includes, but is not limited to, semi-cylindrical, rectangular, etc. And the shapes of the cavity in the first cavity 8 and the two cavities in the second cavity 9 may be different, and may be set according to actual needs, and the shape of the cavity is not particularly limited in the present invention.
More preferably, the materials of the first cavity 8 and the second cavity 9 are pure copper, and the shielding performance is achieved, so that the influence of the change of the external temperature on the internal constant temperature environment is small. Since the dimensions of the double-sided coplanar waveguide chip 11 are 21mm long, 17mm wide and 0.3mm thick, the thickness of the plating layer is 0.01mm. Therefore, a gap 13 is formed at the space connection part of the coaxial waveguide transition structure 10 and the metal cavity where the double-sided coplanar waveguide chip 11 is placed, and the gap 13 coincides with the straight line where the first elastic connecting piece 12 and the second elastic connecting piece 121 are located; the width of the gap 13 is 0.3mm. Perfect contact is ensured between the double-sided coplanar waveguide chip 11 and the core thermistor load seat 3. And the depth of the gap 13 is 0.2mm, so that the coplanar waveguide chip 11 can be placed in the gap 13, and the step compensation effect is realized.
As shown in fig. 4 and 5, the coaxial waveguide transition structure 10 is a stepped cylinder, and the diameter of the side connected with the metal cavity is smallest, and increases in a stepped manner sequentially toward the end far from the metal cavity. Can be better matched with the heat insulation structure 4. The center of the coaxial waveguide transition structure 10 is provided with a cylindrical inner conductor 14; the coaxial waveguide transition structure 10 and the second cavity 9 are both provided with adjustable elastic connectors inside. The outer surface of the coaxial waveguide transition structure 10 is provided with a heating component and a temperature measuring component. The coaxial waveguide transition structure 10 is connected with a second conversion head 18 at one end far away from the metal cavity, the second conversion head 18 is connected with the inner conductor 14, and radio frequency signals received from the radio frequency receiving device are input into the coaxial waveguide transition structure 10 and transmitted to the double-sided coplanar waveguide chip 11 through the inner conductor 14 and the central conductor 15 for radio frequency signal processing.
More preferably, the heating means includes, but is not limited to, a heating film; the temperature measuring component includes but is not limited to platinum resistor and the like. The second adapter 18 is a 2.4mm fitting.
The adjustable elastic connection comprises a first elastic connection 12 and a second elastic connection 121 which are arranged at equal intervals on two sides of an inner conductor 14 of the coaxial waveguide transition structure 10. The adjustable elastic connection further comprises a third elastic connection 17, a fifth elastic connection 16, a fourth elastic connection 171 and a sixth elastic connection 161 arranged in the second cavity 9. The third elastic connection member 17 and the fourth elastic connection member 171 are symmetrically disposed along the central axis where the inner conductor 14 is located, and are disposed at a side away from the coaxial waveguide transition structure 10. The fifth elastic connection piece 16 and the sixth elastic connection piece 161 are also symmetrical along the central axis where the inner conductor 14 is located, and are disposed on the inner side wall near one end of the coaxial waveguide transition structure 10.
The first elastic connecting piece 12 and the second elastic connecting piece 121 have the same structure, and a first cylindrical small block and a first spring tube are sequentially arranged from one end, close to a metal cavity formed by the first cavity 8 and the second cavity 9, to one end, far away from the metal cavity, of the metal cavity, and the first cylindrical small block protrudes out of the coaxial waveguide transition structure 10.
The third elastic connecting member 17, the fourth elastic connecting member 171, the fifth elastic connecting member 16 and the sixth elastic connecting member 161 have the same structure, and are a first small screw, a second spring tube and a second cylindrical small block in this order from the inner wall of the second cavity 9 to the direction of the inner space of the formed metal cavity.
The first cylindrical small block and the second cylindrical small block are equal in size and dimension, the diameter of the first cylindrical small block and the diameter of the second cylindrical small block are slightly larger than the thickness of the coplanar waveguide chip 11, and the difference threshold interval of the first cylindrical small block and the second cylindrical small block is smaller than or equal to 0.5mm. And the first cylindrical small block and the second cylindrical small block are both made of pure copper materials.
As shown in fig. 4 and 6, the double-sided coplanar waveguide chip 11 is placed in the metal cavity, and the connection between the first cavity 8 and the second cavity 9 and the straight line where the first elastic connection member 12 and the second elastic connection member 121 are located on the same plane, that is, the first elastic connection member 12, the second elastic connection member 121, the third elastic connection member 17, the fourth elastic connection member 171, the fifth elastic connection member 16 and the sixth elastic connection member 161 are located on the same plane.
By adjusting the tightness of the first screws of the fifth elastic connection piece 16 and/or the sixth elastic connection piece 161, the position of the double-sided coplanar waveguide chip 11 can be adjusted left and right, so as to ensure perfect butt joint between the central conductor 15 of the double-sided coplanar waveguide chip 11 and the inner conductor of the coaxial waveguide transition structure 10, and transition from the coaxial structure to the planar coplanar waveguide structure can be realized, thereby minimizing reflection. By adjusting the tightness of the first small screw of the third elastic connector 17 and/or the fourth elastic connector 171, the double-sided coplanar waveguide chip 11 is pushed to radially compress the first elastic connector 12 and/or the second elastic connector 121, and the depth of the gap 13 embedded in the double-sided coplanar waveguide chip 11 is adjusted, so that the purpose of transition size is achieved.
The diameter of the inner conductor 14 of the coaxial waveguide transition structure 10 is slightly smaller than the width dimension of the coplanar waveguide termination with the double-sided coplanar waveguide chip 11, and the diameter difference between the inner conductor 14 and the center conductor 15 is smaller than 0.2mm. And the first coplanar waveguide surface 20 and the second coplanar waveguide surface 21 are symmetrically disposed with respect to the inner conductor 14 to minimize reflection, and the depth of the double-sided coplanar waveguide chip in the slot 13 of the coaxial waveguide transition structure 10 is adjusted by adjusting the tightness degree of the elastic connection member, so as to realize the transition between the coaxial waveguide and the waveguide, and the compensation step design is performed at the termination of the inner conductor 14 and the coplanar waveguide, so as to realize the bandwidth matching.
The working direct current bias input, the compensation direct current bias input, the temperature measurement output, the heating input and the like led out from the core thermistor load seat 3 are input into the circuit board 5 for processing, the long lead inductance is eliminated, the corresponding electric signal is obtained, the electric signal is output to the connector 7, the connector 7 is connected with the power meter, and the electric signal is output as a numerical value, so that data communication, voltage and resistance input and output are realized.
Example 2:
As shown in fig. 7, the rf signal receiving unit includes a 2.9mm rf connector 1 and a 2.4mm straightener 19. The radio frequency signal processing unit comprises a core thermistor load seat 3, a circuit board 5 and a heat insulation structure 4 for bearing the core thermistor load seat 3 and the circuit board 5. The electrical signal output unit comprises a connector 7.
The heat insulation structure 4 comprises a front cover plate 2 and a rear cover plate 6, and forms a cylindrical structure with the inside heat insulation. The radio frequency connector 1 is fixed on the front cover plate 2, is connected with the straight-blocking device 19, is connected with the core thermistor load seat 3 through the adapter 18, and transmits microwave signals collected by the radio frequency connector 1 to the core thermistor load seat 3 for processing. The connector 7 is fixed on the rear cover plate 6 and is electrically connected with the circuit board 5, so that data communication, voltage and resistance signals are input and output.
More preferably, a sheath which is favorable for screwing is arranged on the outer surface of the radio frequency connector 1, so that the precise connection between the double-sided coplanar waveguide chip type coaxial thermistor type power seat and equipment is ensured. The heat insulation structure 4 is made of plastic, the front cover plate 2 and the rear cover plate 6 are made of stainless steel, the stainless steel and the plastic are hot bad conductors, and the heat insulation structure 4, the front cover plate 2 and the rear cover plate 6 form a cylindrical structure, so that the core thermistor load seat 3 and the circuit board 5 are fixed inside, and internal and external thermal insulation and internal constant temperature can be effectively realized.
The said isolator 19 is made of stainless steel material, and can isolate the DC signal and allow the RF microwave signal to pass through. The direct current bias voltage detector can effectively prevent the direct current signal of the signal source from being input into the thermistor circuit to cause measurement data errors, and also prevent the direct current bias voltage in the thermistor circuit from damaging the signal source.
In order not to affect the transmission efficiency of the coaxial thermistor type power seat with double-sided coplanar waveguide chip, the insertion loss of the straight isolator 19 is as small as possible. More preferably, the insertion loss of the retarder 19 is 0.2dB or less.
The radio frequency connector 1 receives a radio frequency microwave signal to be measured, and filters a direct current signal of a signal source through the straight-blocking device 19; inputting a radio frequency microwave signal to be measured into the core thermistor load seat 3, and performing bandwidth matching on the input radio frequency microwave signal by the core thermistor load seat 3 to realize transition from a coaxial structure to a planar coplanar waveguide structure so as to obtain an output signal; the output signals are processed on the circuit board 5 and output as electric signals, and the electric signals are input into a power meter through a connector to realize data communication.
It should be noted that the rf connector of the preferred embodiment 1 of the present invention is 2.4mm, and the rf connector of the preferred embodiment 2 is 2.9mm. But this does not mean that the rf connector of the present invention has only two dimensions of 2.4mm and 2.9mm. And therefore should not be taken as limiting the invention. The radio frequency connector 1 of the present invention includes, but is not limited to, two dimensions of 2.4mm and 2.9mm.
The invention discloses a coaxial thermistor type power seat of a double-sided coplanar waveguide chip, which is characterized in that an elastic connecting piece is designed for preventing the double-sided coplanar waveguide chip from being different in axis due to too small size in the assembly process, and the optimal matching performance is realized by adjusting the screwing depth of the elastic connecting piece in the assembly process. The movement of the double-sided coplanar waveguide chip in the transverse direction and the radial direction is realized by adjusting the tightness of the elastic connecting piece, so that the adjustment of the axial center position of the double-sided coplanar waveguide chip is realized. And secondly, a novel symmetrical double-sided coplanar waveguide chip type structure is adopted, so that better matching and wider bandwidth are realized. Finally, the microwave power measurement with the maximum frequency above 110GHz can be realized. The best matching of more than 50GHz is realized through an adjustable elastic connecting piece, a coaxial waveguide transition structure and the like.
The foregoing is a description of a preferred embodiment of the invention to assist those skilled in the art in more fully understanding the invention. These examples are merely illustrative and the present invention is not to be construed as being limited to the descriptions of these examples. It should be understood that, to those skilled in the art to which the present invention pertains, several simple deductions and changes can be made without departing from the inventive concept, and these should be considered as falling within the scope of the present invention.
Claims (3)
1. The double-sided coplanar waveguide chip type coaxial thermistor type power seat is characterized by comprising a radio frequency signal receiving unit, a radio frequency signal processing unit and an electric signal output unit which are sequentially connected; the radio frequency signal receiving unit receives an external microwave signal and outputs the microwave signal to the radio frequency signal processing unit for data processing;
The radio frequency signal processing unit comprises a core thermistor load seat and a circuit board; the core thermistor load seat comprises a metal cavity and a coaxial waveguide transition structure, wherein the metal cavity comprises a first cavity and a second cavity; the inner surface of one end of the second cavity close to the coaxial waveguide transition structure is provided with a groove, and the size of the groove is matched with that of the double-sided coplanar waveguide chip; the first cavity and the second cavity are provided with cavities at one end far away from the coaxial waveguide transition structure, and the cavities are flush from one end far away from the coaxial waveguide transition structure of the first cavity and/or the second cavity to the side edge of a groove for placing the double-sided coplanar waveguide chip; a gap is formed at the joint of the first cavity and the second cavity, and a gap matched with the gap is formed in the coaxial waveguide transition structure; the gap coincides with a straight line where the first elastic connecting piece and the second elastic connecting piece are located; the thickness of the gap is equal to that of the coplanar waveguide chip, and the depth is 0.2mm; perfect contact is carried out between the double-sided coplanar waveguide chip and the core thermistor load seat, so that step compensation is realized; the coaxial waveguide transition structure comprises an elastic connecting piece for adjusting the position of the double-sided coplanar waveguide chip; the coaxial waveguide transition structure is provided with a cylindrical inner conductor in the center, and adjustable elastic connecting pieces are arranged in the coaxial waveguide transition structure and the second cavity; the adjustable elastic connecting piece comprises a first elastic connecting piece and a second elastic connecting piece which are arranged at two sides of the inner conductor of the coaxial waveguide transition structure at equal intervals; the adjustable elastic connecting piece further comprises a third elastic connecting piece, a fourth elastic connecting piece, a fifth elastic connecting piece and a sixth elastic connecting piece which are arranged in the second cavity; the third elastic connecting piece and the fourth elastic connecting piece are symmetrically arranged along the central axis where the inner conductor is located and are arranged at one side far away from the coaxial waveguide transition structure; the fifth elastic connecting piece and the sixth elastic connecting piece are also symmetrical along the central axis where the inner conductor is positioned and are arranged on the inner side wall near one end of the coaxial waveguide transition structure;
The first elastic connecting piece and the second elastic connecting piece have the same structure, a first cylindrical small block and a first spring tube are sequentially arranged from one end, close to a metal cavity formed by the first cavity and the second cavity, to one end, far away from the metal cavity, of the first elastic connecting piece, and the first cylindrical small block protrudes out of the coaxial waveguide transition structure; the third elastic connecting piece, the fourth elastic connecting piece, the fifth elastic connecting piece and the sixth elastic connecting piece have the same structure, and a first small screw, a second spring tube and a second cylindrical small block are sequentially arranged from the inner wall of the second cavity to the inner space of the formed metal cavity; the first cylindrical small block and the second cylindrical small block are equal in size and dimension, and the diameters of the first cylindrical small block and the second cylindrical small block are larger than the thickness of the coplanar waveguide chip; the difference value between the diameters of the first cylindrical small block and the second cylindrical small block and the thickness of the coplanar waveguide chip is less than or equal to 0.5mm; the diameter of the inner conductor of the coaxial waveguide transition structure is smaller than the width of the coplanar waveguide termination of the double-sided coplanar waveguide chip, and the diameter difference between the inner conductor and the central conductor is smaller than 0.2mm; the first coplanar waveguide surface and the second coplanar waveguide surface are symmetrically arranged relative to the inner conductor, the depth of a gap of a coaxial waveguide transition structure embedded in the double-sided coplanar waveguide chip is adjusted, the transition between the coaxial waveguide and the waveguide is realized, and the compensation step design is carried out at the joint of the inner conductor and the coplanar waveguide, so that the bandwidth matching is realized; the double-sided coplanar waveguide chip processes the microwave signals received by the radio frequency signal receiving unit and then converts the microwave signals into electric signals through the circuit board to be output;
The electric signal output unit receives the electric signal output by the radio frequency signal processing unit and outputs the electric signal as a numerical value.
2. The dual-sided coplanar waveguide chip coaxial thermistor power mount according to claim 1, wherein the radio frequency signal processing unit further comprises a thermal insulation structure carrying the core thermistor load mount and a circuit board and a second adapter connected to the core thermistor load mount; the heat preservation structure comprises a front cover plate, a rear cover plate and a cylinder body.
3. The dual-sided coplanar waveguide chip coaxial thermistor type power seat according to claim 2, wherein the radio frequency signal receiving unit comprises a radio frequency connector and a first adapter connected with the radio frequency signal processing unit; the first adapter is connected with the straight-blocking device, and the straight-blocking device is connected with the second adapter to shield direct current signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410487946.9A CN118101095B (en) | 2024-04-23 | Double-sided coplanar waveguide chip type coaxial thermistor type power seat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410487946.9A CN118101095B (en) | 2024-04-23 | Double-sided coplanar waveguide chip type coaxial thermistor type power seat |
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| Publication Number | Publication Date |
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| CN118101095A CN118101095A (en) | 2024-05-28 |
| CN118101095B true CN118101095B (en) | 2024-07-09 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102903991A (en) * | 2012-09-24 | 2013-01-30 | 南京邮电大学 | Asymmetric coplanar waveguide-two-sided parallel bi-wire broadband conversion connector |
| CN112994760A (en) * | 2021-04-26 | 2021-06-18 | 成都雷电微晶科技有限公司 | Multi-beam tile type TR (transmitter-receiver) component with high integration degree |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102903991A (en) * | 2012-09-24 | 2013-01-30 | 南京邮电大学 | Asymmetric coplanar waveguide-two-sided parallel bi-wire broadband conversion connector |
| CN112994760A (en) * | 2021-04-26 | 2021-06-18 | 成都雷电微晶科技有限公司 | Multi-beam tile type TR (transmitter-receiver) component with high integration degree |
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