CN109786913B - Radio frequency coaxial load based on thin film resistor - Google Patents
Radio frequency coaxial load based on thin film resistor Download PDFInfo
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- CN109786913B CN109786913B CN201910222751.0A CN201910222751A CN109786913B CN 109786913 B CN109786913 B CN 109786913B CN 201910222751 A CN201910222751 A CN 201910222751A CN 109786913 B CN109786913 B CN 109786913B
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- resistor
- film resistor
- rear end
- thin film
- positioning sleeve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to a radio frequency coaxial load, in particular to a radio frequency coaxial load based on a thin film resistor, which aims to solve the technical problems of large volume, low power resistance and use frequency and high processing difficulty of the existing radio frequency coaxial load. The radio frequency coaxial load comprises a shell, an insulating medium, an inner conductor, a rear cover and a load resistor; the hair button and the positioning sleeve are also included; the rear end of the inner conductor is provided with a blind hole; the hair button is arranged in the blind hole, and the rear end of the hair button slightly extends out of the blind hole; the positioning sleeve is of a cylindrical structure and is arranged between the inner conductor and the rear cover; the load resistor is a film resistor; the thin film resistor comprises a plate-shaped substrate, a 50 omega square resistor sputtered on the plate-shaped substrate, a grounding wire coated on the plate-shaped substrate and a microstrip line; the plate-shaped base material is embedded in the positioning sleeve; the length of the platy base material is the same as that of the positioning sleeve; the front end of the microstrip line is connected with the rear end of the button, and the rear end of the microstrip line is connected with the front end of the 50Ω sheet resistor; the rear end of the 50Ω sheet resistor is connected with the front end of the grounding wire; the rear end of the grounding wire is connected with the rear cover.
Description
Technical Field
The invention relates to a radio frequency coaxial load, in particular to a radio frequency coaxial load based on a thin film resistor.
Background
The radio frequency coaxial load is widely applied to radio equipment, electronic instruments and various microwave devices, and impedance matching is carried out on an empty standby signal channel and a test port in a system, so that the impedance matching of signals is ensured, signal leakage of the empty port and mutual interference among the systems are greatly reduced, and the radio frequency coaxial load is one of important components of a radio frequency transmission system, and the performance of the radio frequency coaxial load directly influences the comprehensive performance of the whole system.
With the continuous development of wireless communication industry, higher requirements are put on the volume, power resistance, electrical performance and the like of the radio frequency coaxial load. The conventional rf coaxial load is connected to the rf coaxial portion by welding or plugging (as shown in fig. 1) using a cylindrical thick film resistor 15, which has the following disadvantages:
1) The thick film resistor 15 (i.e. the ceramic rod is coated with NiCr, the nominal value of the resistor is equal to the characteristic impedance of the transmission line) has large diameter, low power resistance and poor stability of the resistance value, so that the volume of the radio frequency coaxial load is large, the power resistance and the use frequency are low;
2) To achieve a good match, the inner wall of the housing 16 containing the resistive portion must often be machined to an exponential or trailing shape, which is complex and difficult to machine.
Disclosure of Invention
The invention provides a radio frequency coaxial load based on a film resistor, which aims to solve the technical problems of large volume, low power resistance and use frequency and high processing difficulty of the conventional radio frequency coaxial load.
The technical scheme of the invention is as follows:
a radio frequency coaxial load based on a film resistor comprises a shell, an insulating medium arranged in the shell, an inner conductor arranged in the insulating medium, a rear cover arranged at the rear part of the shell, and a load resistor arranged in the shell and positioned between the inner conductor and the rear cover; it is characterized in that the utility model also comprises a button and a positioning sleeve;
the rear end of the inner conductor is provided with a blind hole; the button is arranged in the blind hole, and the rear end of the button extends out of the blind hole;
the positioning sleeve is of a cylindrical structure and is arranged between the inner conductor and the rear cover;
the load resistor is a thin film resistor; the thin film resistor comprises a plate-shaped substrate, a 50Ω square resistor sputtered on the plate-shaped substrate, and a grounding wire and a microstrip line which are coated on the plate-shaped substrate and are respectively connected with two ends of the 50Ω square resistor; the grounding wire is also coated on the two side edge areas and the rear end face of the plate-shaped base material in an extending mode, and the microstrip line is coated on the middle of the front end face of the plate-shaped base material in an extending mode;
the length of the platy base material is the same as that of the locating sleeve, and the front end face and the rear end face are flush with the locating sleeve; the edges of the two sides of the plate-shaped base material are embedded into the inner wall of the positioning sleeve along the width direction;
the front end of the thin film resistor is connected with the rear end of the button, and the rear end of the thin film resistor is connected with the rear cover, so that the microstrip line is in elastic contact with the rear end of the button, and the grounding wire is in contact with the rear cover.
Further, in order to perform electrical performance index adjustment on the radio frequency coaxial load, the thin film resistor further comprises index adjustment areas, wherein the index adjustment areas are coated on the platy substrate and are positioned on two sides of the microstrip line; the index adjusting area comprises a plurality of adjusting wires which are arranged in parallel and are connected with the grounding wire; the length, the width and the mutual distance of the adjusting wires are unequal.
Further, two C-shaped grooves are symmetrically formed in the positioning sleeve; the plate-shaped base material is embedded in the two C-shaped grooves of the positioning sleeve.
Further, the 50Ω sheet resistor comprises two resistors which are parallel to each other and are arranged at intervals, and the resistance values of the two resistors are equal.
Further, the fur button is formed by winding beryllium bronze wires.
Further, the plate-shaped base material is made of ceramic materials.
Further, the positioning sleeve 3 is made of HPb 59-brass material.
Compared with the prior art, the invention has the advantages that:
1. the invention adopts the elastic connection of the film resistor and the button to realize high-frequency transmission, and the film resistor has small volume and small resistance value along with the temperature change, thus ensuring small volume, high power resistance and high use frequency of the radio frequency coaxial load.
2. The invention adopts the positioning sleeve to position the thin film resistor, and the inner wall of the shell is not required to be processed into an index or a drag line shape, so the processing is convenient.
3. The radio frequency coaxial load is elastically connected with the thin film resistor through the button, welding or inserting is not needed, and the structure is simple and the cost is low.
Drawings
Fig. 1 is a schematic structural diagram of a conventional rf coaxial load;
FIG. 2 is a half cross-sectional view of a radio frequency coaxial load of the invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 5 is a schematic illustration of the connection of the button and the inner conductor of FIG. 2;
FIG. 6 is a front view of a sheet resistor in a RF coaxial load of the present invention;
FIG. 7 is a side view of a sheet resistor in a RF coaxial load of the present invention;
FIG. 8 is a top view of a sheet resistor in a RF coaxial load of the present invention;
the reference numerals are: 1-shell, 2-insulating medium, 3-locating sleeve, 4-thin film resistor, 51-button, 52-inner conductor, 6-back cover, 7-index adjusting area, 8-50Ω square resistor, 9-microstrip line, 10-plate substrate, 11-grounding wire, 12-blind hole, 13-adjusting wire, 14-C-shaped groove, 15-thick film resistor, 16-shell.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
Referring to fig. 2 to 4, the rf coaxial load based on the thin film resistor of the present invention comprises a housing 1, an insulating medium 2 disposed in the housing, an inner conductor 52 disposed in the insulating medium, a rear cover 6 disposed at the rear of the housing, a load resistor disposed in the housing and located between the inner conductor and the rear cover, and a button 51 and a positioning sleeve 3;
the rear end of the inner conductor 52 is provided with a blind hole 12; the button 51 is disposed in the blind hole 12 and the rear end thereof slightly protrudes out of the blind hole, see fig. 5; the assembly of the button 51 and the inner conductor 52 is assembled into the insulating medium 2, and then the insulating medium is filled into the shell 1 to complete the assembly of the radio frequency interface, wherein the button 51 is wound by beryllium bronze wires. .
The positioning sleeve 3 is of a cylindrical structure and is arranged between the inner conductor 52 and the rear cover 6; the positioning sleeve is pressed by the rear cover and the shell, and the rear cover 6 and the shell 1 are in interference fit to complete radio frequency grounding; when the radio frequency coaxial load bears high power, heat conduction can be effectively carried out through the positioning sleeve 3, the rear cover 6 and the shell 1, so that the high power resistance characteristic of the radio frequency coaxial load is realized.
The load resistor is a film resistor 4; the thin film resistor comprises a plate-shaped substrate 10, a 50Ω square resistor 8 sputtered on the plate-shaped substrate, and a grounding wire 11 and a microstrip line 9 which are coated on the plate-shaped substrate 10 and are respectively connected with two ends of the 50Ω square resistor 8, see fig. 6-8; wherein, the grounding wire 11 is also coated on the two side edge areas and the rear end face of the plate-shaped base material 10 in an extending way, and the microstrip line 9 is coated on the middle part of the front end face of the plate-shaped base material 10 in an extending way; the length of the platy base material 10 is the same as that of the positioning sleeve 3, and the front end surface and the rear end surface are flush with the positioning sleeve; the two side edges of the plate-shaped base material 10 are embedded into the inner wall of the positioning sleeve 3 along the width direction; the 50Ω sheet resistor 8 may be a resistor with a resistance value of 50Ω, or may be a plurality of resistors with equal values, and the sum of the resistance values is 50Ω, and in this embodiment, the 50Ω sheet resistor includes two resistors parallel to each other and arranged at intervals, where the resistance values of the two resistors are equal.
The front end of the thin film resistor 4 is connected with the rear end of the button 51, and the rear end of the thin film resistor 4 is connected with the rear cover 6, so that the microstrip line 9 is elastically contacted with the rear end of the button, and the grounding line 11 is contacted with the rear cover 6.
In the embodiment of the invention, the positioning sleeve is made of HPb 59-brass material, two C-shaped grooves 14 are symmetrically arranged in the positioning sleeve 3, and the plate-shaped base material 10 is embedded in the two C-shaped grooves 14 of the positioning sleeve 3, so that the positioning accuracy of the thin film resistor can be ensured; the thin film resistor 4 is combined with the circular positioning sleeve 3, and the whole structure is matched as a suspension line structure with 50 ohm characteristic impedance.
The thin film resistor further comprises an index adjustment area 7 for adjusting the electrical performance index of the radio frequency coaxial load, wherein the index adjustment frequency range is related to the radio frequency interface. The index adjusting area 7 is coated on the platy substrate 10 and positioned at two sides of the microstrip line, and comprises a plurality of adjusting lines 13 which are arranged in parallel and are connected with the grounding line; the length, width and mutual spacing of the adjustment lines 13 are unequal; as can be seen from fig. 6, the index adjustment regions 7, 50Ω sheet resistor 8, and the like are all located on the upper surface of the plate-like base material, the lower surface of the plate-like base material is not provided, and the index adjustment regions 7, 50Ω sheet resistor 8 are not provided either with a ground line or a microstrip line.
The invention uses the elastic function of the button and the film resistor to carry out welding-free connection, thus realizing high-frequency transmission; the thin film resistor adopts a plate-shaped substrate made of ceramic material, the thin resistor is sputtered on the plate-shaped substrate, and impedance matching is completed by combining a transmission line theory. The film resistor can achieve a very low temperature coefficient, so that the resistance value of the resistor is very small along with the temperature change, and the structure is stable and reliable, the withstand power and the like are superior to those of the columnar resistor.
Claims (7)
1. A radio frequency coaxial load based on a film resistor comprises a shell (1), an insulating medium (2) arranged in the shell (1), an inner conductor (52) arranged in the insulating medium (2), a rear cover (6) arranged at the rear part of the shell (1), and a load resistor arranged in the shell (1) and positioned between the inner conductor (52) and the rear cover (6); the method is characterized in that: the hair button also comprises a hair button (51) and a positioning sleeve (3);
the rear end of the inner conductor (52) is provided with a blind hole (12); the button hair (51) is arranged in the blind hole (12) and the rear end of the button hair extends out of the blind hole (12);
the positioning sleeve (3) is of a cylindrical structure and is arranged between the inner conductor (52) and the rear cover (6);
the load resistor is a thin film resistor (4); the thin film resistor (4) comprises a plate-shaped substrate (10), a 50Ω square resistor (8) sputtered on the plate-shaped substrate (10), and a grounding wire (11) and a microstrip line (9) which are coated on the plate-shaped substrate (10) and are respectively connected with two ends of the 50Ω square resistor; the grounding wire (11) is further coated on the two side edge areas and the rear end face of the platy base material (10) in an extending mode, and the microstrip line (9) is further coated on the middle of the front end face of the platy base material (10) in an extending mode;
the length of the platy base material (10) is the same as that of the positioning sleeve (3), and the front end face and the rear end face are flush with the positioning sleeve; the edges of the two sides of the plate-shaped base material (10) are embedded into the inner wall of the positioning sleeve (3) along the width direction;
the front end of the thin film resistor (4) is connected with the rear end of the button (51), the rear end of the thin film resistor (4) is connected with the rear cover (6), the microstrip line (9) is in elastic contact with the rear end of the button, and the grounding line (11) is in contact with the rear cover (6).
2. The thin film resistor based radio frequency coaxial load of claim 1, wherein: the thin film resistor (4) further comprises an index adjustment area (7);
the index adjusting areas (7) are coated on the platy base material (10) and are positioned on two sides of the microstrip line (9);
the index adjusting area (7) comprises a plurality of adjusting wires (13) which are arranged in parallel and are connected with the grounding wire (11); the length, width and mutual spacing of the adjusting wires (13) are unequal.
3. The rf coaxial load based on sheet resistance according to claim 1 or 2, characterized in that: two C-shaped grooves (14) are symmetrically formed in the positioning sleeve (3);
the plate-shaped base material (10) is embedded in two C-shaped grooves (14) of the positioning sleeve (3).
4. A thin film resistor based radio frequency coaxial load according to claim 3, wherein: the 50 omega-shaped sheet resistor comprises two resistors which are parallel to each other and are arranged at intervals, and the resistance values of the two resistors are equal.
5. The rf coaxial load based on sheet resistance of claim 4, wherein: the button (51) is formed by winding beryllium bronze wires.
6. The rf coaxial load based on sheet resistance of claim 5, wherein: the plate-shaped base material (10) is made of a ceramic material.
7. The rf coaxial load based on sheet resistance of claim 6, wherein: the locating sleeve (3) is made of HPb 59-brass material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910222751.0A CN109786913B (en) | 2019-03-22 | 2019-03-22 | Radio frequency coaxial load based on thin film resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910222751.0A CN109786913B (en) | 2019-03-22 | 2019-03-22 | Radio frequency coaxial load based on thin film resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109786913A CN109786913A (en) | 2019-05-21 |
| CN109786913B true CN109786913B (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910222751.0A Active CN109786913B (en) | 2019-03-22 | 2019-03-22 | Radio frequency coaxial load based on thin film resistor |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0023437A1 (en) * | 1979-07-27 | 1981-02-04 | The Bendix Corporation | Radio frequency load resistor |
| CN2108364U (en) * | 1991-11-23 | 1992-06-24 | 国营第七二○厂 | Coaxial load |
| US5151676A (en) * | 1989-02-02 | 1992-09-29 | Fujitsu Limited | Film resistance terminator |
| JP2000174506A (en) * | 1998-12-08 | 2000-06-23 | Nihon Koshuha Co Ltd | Dry large power dummy load |
| CN1535493A (en) * | 2000-11-14 | 2004-10-06 | ���Ͽع�����˾ | Surge protected coaxial termination |
| CN201478424U (en) * | 2009-07-02 | 2010-05-19 | 深圳市禹龙通电子有限公司 | Coaxial load |
| CN202749489U (en) * | 2012-08-13 | 2013-02-20 | 上海雷迪埃电子有限公司 | Radio-frequency coaxial load structure |
| CN203733545U (en) * | 2014-03-06 | 2014-07-23 | Tdk大连电子有限公司 | Small-size ceramic thick film radio frequency resistor |
| CN106803618A (en) * | 2016-12-29 | 2017-06-06 | 中国航天时代电子公司 | A kind of button-shaped radio frequency (RF) coaxial connector of hair |
| CN107611729A (en) * | 2017-08-30 | 2018-01-19 | 上海航天科工电器研究院有限公司 | For exempting from the radio frequency resilient contact structure of weldering interconnection |
| CN107732518A (en) * | 2017-10-11 | 2018-02-23 | 上海航天科工电器研究院有限公司 | A kind of hair button radio frequency (RF) coaxial connector sealed by force |
| CN207098027U (en) * | 2017-03-31 | 2018-03-13 | 苏州泰莱微波技术有限公司 | A kind of New-type radio-frequency coaxial load |
| CN209418740U (en) * | 2019-03-22 | 2019-09-20 | 西安雷航电子信息技术有限公司 | A kind of radio frequency coaxial load based on film resistor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7212079B2 (en) * | 2002-09-04 | 2007-05-01 | Huber+Suhner Ag | Attenuation or termination element having a coaxial structure for radio frequency electromagnetic waves |
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2019
- 2019-03-22 CN CN201910222751.0A patent/CN109786913B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0023437A1 (en) * | 1979-07-27 | 1981-02-04 | The Bendix Corporation | Radio frequency load resistor |
| US5151676A (en) * | 1989-02-02 | 1992-09-29 | Fujitsu Limited | Film resistance terminator |
| CN2108364U (en) * | 1991-11-23 | 1992-06-24 | 国营第七二○厂 | Coaxial load |
| JP2000174506A (en) * | 1998-12-08 | 2000-06-23 | Nihon Koshuha Co Ltd | Dry large power dummy load |
| CN1535493A (en) * | 2000-11-14 | 2004-10-06 | ���Ͽع�����˾ | Surge protected coaxial termination |
| CN201478424U (en) * | 2009-07-02 | 2010-05-19 | 深圳市禹龙通电子有限公司 | Coaxial load |
| CN202749489U (en) * | 2012-08-13 | 2013-02-20 | 上海雷迪埃电子有限公司 | Radio-frequency coaxial load structure |
| CN203733545U (en) * | 2014-03-06 | 2014-07-23 | Tdk大连电子有限公司 | Small-size ceramic thick film radio frequency resistor |
| CN106803618A (en) * | 2016-12-29 | 2017-06-06 | 中国航天时代电子公司 | A kind of button-shaped radio frequency (RF) coaxial connector of hair |
| CN207098027U (en) * | 2017-03-31 | 2018-03-13 | 苏州泰莱微波技术有限公司 | A kind of New-type radio-frequency coaxial load |
| CN107611729A (en) * | 2017-08-30 | 2018-01-19 | 上海航天科工电器研究院有限公司 | For exempting from the radio frequency resilient contact structure of weldering interconnection |
| CN107732518A (en) * | 2017-10-11 | 2018-02-23 | 上海航天科工电器研究院有限公司 | A kind of hair button radio frequency (RF) coaxial connector sealed by force |
| CN209418740U (en) * | 2019-03-22 | 2019-09-20 | 西安雷航电子信息技术有限公司 | A kind of radio frequency coaxial load based on film resistor |
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| D. Carter.'Fuzz Button' interconnects at microwave and mm-wave frequencies.《IEE Seminar on Packaging and Interconnects at Microwave and mm-Wave Frequencies (Ref. No. 2000/083)》.2000,全文. * |
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| CN109786913A (en) | 2019-05-21 |
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