CN202749489U - Radio-frequency coaxial load structure - Google Patents
Radio-frequency coaxial load structure Download PDFInfo
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- CN202749489U CN202749489U CN 201220400322 CN201220400322U CN202749489U CN 202749489 U CN202749489 U CN 202749489U CN 201220400322 CN201220400322 CN 201220400322 CN 201220400322 U CN201220400322 U CN 201220400322U CN 202749489 U CN202749489 U CN 202749489U
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Abstract
The utility model discloses a radio-frequency coaxial load structure, comprising an inner conductor, an outer conductor, a resistor, an insulator and a rear cover, wherein the inner conductor, the insulator and the outer conductor are arranged in sequence from inside to outside in a coaxial manner; and the rear cover is connected with the tail part of the outer conductor. The radio-frequency coaxial load structure is characterized in that the rear end surfaces of the inner conductor, the insulator and the outer conductor are in the same plane; the resistor is a chip resistor; the bottom surface of the resistor is a plane, and the two electrodes of the resistor are arranged at the two ends of the bottom surface; one electrode of the resistor is electrically connected with the rear end surface of the inner conductor, and the other electrode of the resistor is electrically connected with the rear end surface of the outer conductor. The radio-frequency coaxial load structure disclosed by the utility model has the advantages that the volume is small, the structure is compact and the reliability of internal electric connection of the radio-frequency coaxial load is improved.
Description
Technical field
The utility model relates to the coaxial single port device of a kind of Miniature RF, particularly relates to a kind of radio frequency coaxial load.
Background technology
Radio frequency coaxial load is microwave passive single port device, and it is widely used in radio-frequency apparatus and the radio circuit.
The major function of coaxial load is the energy that all absorbs from transmission line, improves the matching performance of circuit, and coaxial load is connected on the terminal of circuit usually, so be called again terminate load or matched load.
Radio frequency coaxial load is widely used in wireless device, electronic instrument and various equipment, be mainly used in the system testing of radio signal transmission and the end of all kinds of electronic apparatus systems connects, in system, alternate channel and test port to vacant equipment carry out impedance matching, both guaranteed the signal impedance coupling, greatly reduced again the phase mutual interference between vacant port signal leakage and system, it is one of important component part of radio-frequency (RF) transmission system, the quality of its performance will have influence on the combination property of whole system.Voltage standing wave ratio is an important indicator of radio frequency coaxial load performance, for proof load obtains lower voltage standing wave ratio, answers emphasis to resolve the coupling of load impedance.Therefore, should make the simple in structure of inner and outer conductor as far as possible, reduce the impedance discontinuity point as far as possible.In commerce is used, more and more less to the demand of volume, more and more higher to reliability requirement, and more and more tighter to the control of cost.So little for volume in the rf frequency range of application, connect reliable, low, the economical and practical coaxial load of cost demand condition is provided.
In the prior art, radio frequency coaxial load adopts cylindrical resistance more, or adopts integrated resistance on pcb board, together is embedded into subsequently the method in the coaxial system.The volume of cylindrical resistance own is larger, is connected to vertically on the coaxial line during assembling, has increased the length of load, thereby has increased the volume of radio frequency coaxial load.Integrated resistance complex manufacturing technology on the pcb board, cost is higher.
The utility model content
The deficiencies in the prior art in view of the above, the purpose of this utility model is to provide a kind of radio frequency coaxial load structure, is used for solving the problems of the prior art.
Reach for achieving the above object other relevant purposes, the utility model provides a kind of radio frequency coaxial load structure, described radio frequency coaxial load structure comprises inner wire, outer conductor, resistance, insulator and bonnet, described inner wire, insulator, outer conductor is from inside to outside coaxial manner and is arranged in order, described bonnet is connected with described outer conductor afterbody, it is characterized in that: described inner wire, insulator, the rear end face of outer conductor is on same plane, described resistance is pellet resistance, the bottom surface of resistance is the two ends that the two poles of the earth of plane and resistance are arranged on described bottom surface, one utmost point of resistance is electrically connected with the rear end face of inner wire, and another utmost point of resistance is electrically connected with the rear end face of outer conductor.
Preferably, a utmost point of described resistance is connected with an end of a tinsel, and the other end of tinsel is electrically connected with the rear end face of described inner wire or outer conductor, and the mid portion of tinsel is movable.
Further, a utmost point of described resistance is connected with the outer end of the first tinsel, and the inner of the first tinsel is electrically connected with the rear end face of described inner wire; Another utmost point of described resistance is connected with the inner of the second tinsel, and the outer end of the second tinsel is electrically connected with the rear end face of described outer conductor.Preferably, the rear end face center of described inner wire is provided with a location boss, and the inner of described the first tinsel is provided with a location hole, and described location hole is enclosed within on the described positioning boss and is welded and fixed.
Further, described bonnet adopts interference fit to be connected with the afterbody of outer conductor or is threaded, and the outer end of described the second tinsel is clamped between bonnet and the outer conductor.
Preferably, the outer end soldering of described the second tinsel is on the rear end face of outer conductor.
Further, described insulator outer cylinder is provided with a circumferential recess, and described outer conductor inwall is provided with an annular boss, and the annular boss on the described outer conductor embeds in the circumferential recess on the described insulator.
Preferably, described bonnet inside is provided with a conical internal cavity.
Further, the surface of described tinsel is provided with electrodeposited coating.
Preferably, described inner wire excircle is provided with hangnail or the annular knurl that inserts insulator inside.
This radio frequency coaxial load structure has adopted pellet resistance, reduced the volume of this radio frequency coaxial load structure, saved processing cost, and this radio-frequency (RF) coaxial terminate load internal electrical junction has increased tinsel, greatly improved the connection reliability of radio frequency coaxial load, inevitably slightly twist or move forward and backward if radio frequency coaxial load runs into when normal operation, can guarantee the integrality that connects, and the tinsel volume that adds is little, thin thickness does not affect the use of radio-frequency (RF) coaxial terminate load.
Description of drawings
Fig. 1 is shown as the structural representation of the first execution mode of the utility model radio frequency coaxial load structure.
Fig. 2 is shown as the cross-sectional view of the utility model Fig. 1.
Fig. 3 is shown as the cross-sectional view of the utility model radio frequency coaxial load structure the second execution mode.
Fig. 4 is shown as the cross-sectional view of the third execution mode of the utility model radio frequency coaxial load structure.
Fig. 5 is shown as the structural representation of the 4th kind of execution mode of the utility model radio frequency coaxial load structure.
Fig. 6 is shown as the cross-sectional view of the utility model Fig. 5.
Fig. 7 is shown as the first shape schematic diagram of the first tinsel 6.
Fig. 8 is shown as the second shape schematic diagram of the first tinsel 6.
Fig. 9 is shown as the first shape schematic diagram of the second tinsel 7.
Figure 10 is shown as the second shape schematic diagram of the second tinsel 7.
Figure 11 is shown as the structural representation of inner wire 1.
Figure 12 is shown as the structural representation that the utility model radio frequency coaxial load structure is used for the QMA interface.
Figure 13 is shown as the structural representation that the utility model radio frequency coaxial load structure is used for the MCX interface.
The number in the figure explanation
1, inner wire
2, outer conductor
3, resistance
4, insulator
5, bonnet
6, the first tinsel
7, the second tinsel
11, positioning boss
12, hangnail
21, annular boss
41, circumferential recess
51, conical internal cavity
61, location hole
Embodiment
Below by particular specific embodiment execution mode of the present utility model is described, person skilled in the art scholar can understand other advantages of the present utility model and effect easily by the disclosed content of this specification.
See also Fig. 1 to Figure 13.Notice, the appended graphic structure that illustrates of this specification, ratio, size etc., equal contents in order to cooperate specification to disclose only, understand and reading for person skilled in the art scholar, be not to limit the enforceable qualifications of the utility model, so technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under the effect that the utility model can produce and the purpose that can reach, all should still drop in the scope that technology contents that the utility model discloses can contain.Simultaneously, quote in this specification as " on ", D score, " left side ", " right side ", " centre " reach the term of " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under without essence change technology contents, when also being considered as the enforceable category of the utility model.
Fig. 5 is a kind of radio frequency coaxial load structure of the utility model, described radio frequency coaxial load structure comprises inner wire 1, outer conductor 2, resistance 3, insulator 4 and bonnet 5, described inner wire 1, insulator 4, outer conductor 2 are from inside to outside coaxial manner and are arranged in order, and described bonnet 5 is connected with described outer conductor 2 afterbodys.Described inner wire 1 and outer conductor 2 are through electroplating processes, the surface is provided with the electrodeposited coating that is beneficial to soldering, the rear end face of described inner wire 1, insulator 4, outer conductor 2 is on same plane, described resistance 3 is pellet resistance, the bottom surface of resistance 3 is the two ends that the two poles of the earth of plane and resistance 3 are arranged on described bottom surface, one utmost point of resistance 3 is electrically connected with the rear end face of inner wire 1, and another utmost point of resistance 3 is electrically connected with the rear end face of outer conductor 2.The rear end face center of inner wire 1 is provided with a location boss 11, and an extremely direct soldering of resistance 3 is on the step plane of positioning boss 11.So far, finished the assembling of radio frequency coaxial load structure.
One utmost point of described resistance 3 is connected with an end of a tinsel, and the other end of tinsel is electrically connected with the rear end face of described inner wire 1 or outer conductor 2, and the mid portion of tinsel is movable, and the surface of tinsel is provided with electrodeposited coating; The first execution mode as depicted in figs. 1 and 2, a utmost point of resistance 3 is connected with the outer end of the first tinsel 6, the inner of the first tinsel 6 is electrically connected with the rear end face of inner wire 1; Another utmost point of resistance 3 is connected with the inner of the second tinsel 7, and the outer end of the second tinsel 7 is electrically connected with the rear end face of outer conductor 2; The second execution mode as shown in Figure 3, a utmost point of described resistance 3 is connected with the outer end of the first tinsel 6, the inner of the first tinsel 6 is electrically connected with the rear end face of inner wire 1, another utmost point of resistance 3 is electrically connected with the rear end face of outer conductor 2; The third execution mode as shown in Figure 4, a utmost point of described resistance 3 is electrically connected with the rear end face of inner wire 1, another utmost point of resistance 3 is connected with the inner of the second tinsel 7, the outer end of the second tinsel 7 is electrically connected with the rear end face of described outer conductor 2.The inner of the first tinsel 6 is provided with a location hole 61(as shown in Figure 7 and Figure 8), described location hole 61 is enclosed within on the described positioning boss 11 and is welded and fixed, described bonnet 5 adopts interference fit to be connected with the afterbody of outer conductor 2 or is threaded, the outer end of described the second tinsel 7 is clamped between bonnet 5 and the outer conductor 2, or the outer end soldering of the second tinsel 7 is on the rear end face of outer conductor 2, described insulator 4 outer cylinders are provided with a circumferential recess 41, described outer conductor 2 inwalls are provided with an annular boss 21, in the circumferential recess 41 that annular boss 21 on the described outer conductor 2 embeds on the described insulator 4, described bonnet 5 inside are provided with a conical internal cavity 51, and described inner wire 1 excircle is provided with hangnail 12 or the annular knurl that inserts insulator 4 inside.
The utility model radio frequency coaxial load is take SMB type radio frequency coaxial load as example, during implementation, inner wire 1 is packed in the insulator 4, subsequently both are packed into together in outer conductor 2 cavitys, described inner wire 1, insulator 4, outer conductor 2 threes become successively from inside to outside coaxial manner to arrange and three's tail end face flushes, hangnail 12 on described inner wire 1 excircle embeds in insulator 4 inner circles, in the circumferential recess 41 that annular boss 21 in outer conductor 2 chambeies embeds on described insulator 4 excircles, described inner wire 1 and insulator 4,4 in described outer conductor 2 and insulator all can't produce axial relative displacement.Resistance 3 is the pellet resistance of flat pattern, and the two poles of the earth of described resistance 3 respectively soldering are connected described inner wire 1 with inner wire 1 and outer conductor 2 tail end faces with outer conductor 2.Bonnet 5 inside are provided with a conical internal cavity 51, can improve inner chamber itself to the impact of electromagnetic signal, make load radio-frequency performance optimization, and resistance 3 contacts the signal shorts that causes with the contact jaw of inner wire 1 with bonnet 5 inwalls in the time of can preventing from assembling simultaneously.
If radio frequency coaxial load is the 50ohm load, described resistance 3 can be selected the resistance 3 of two 100ohm or the resistance 3 of a 50ohm; If radio frequency coaxial load is the 75ohm load, described resistance 3 can be selected the resistance 3 of two 150ohm or the resistance 3 of a 75ohm.Usually, select the radio-frequency performance of the radio frequency coaxial load that two resistance 3 assemble better than the radio-frequency performance of the radio frequency coaxial load of selecting a resistance 3 to assemble.
In certain applications, under plug number of times few cases, resistance 3 directly is electrically connected the processing cost that can effectively reduce radio frequency coaxial load with inner wire 1, outer conductor 2, economical and practical.If plugging comparatively frequently occasion of number of times, need to adopt the mode that adds tinsel at the connection reliability that strengthens to a greater extent radio frequency coaxial load.
Described inner wire 1 afterbody is provided with a location boss 11, the first tinsel 6 is enclosed within on the positioning boss 11, the outer end of the first tinsel 6 and resistance 3 wherein a utmost point carry out soldering, and soldering is carried out in the inner of described the first tinsel 6 and described inner wire 1 afterbody location bottom end face.The second tinsel 7 adopts ring-type or strip structure, when described the second tinsel 7 is that circulus is when (as shown in figure 10), described the second tinsel 7 is enclosed within on the positioning boss 11, both coincide in the axle center, the annulus medial extremity of the second tinsel 7 is connected with another utmost point soldering of resistance 3, and the annulus outboard end of the second tinsel 7 links to each other with outer conductor 2 rear end faces; When the second tinsel 7 is that the strip structure is when (as shown in Figure 9), the inner of the second tinsel 7 is connected with another utmost point soldering of resistance 3, the outer end of the second tinsel 7 links to each other with the rear end face of outer conductor 2, particularly, soldering can be adopted with 2 of outer conductors or the mode of crimping is connected in the outer end of the second tinsel 7.If the second tinsel 7 takes the mode of soldering to be connected with outer conductor 2, outer conductor 2 surfaces need through electroplating processes, make its plated surface be conducive to the coating that soldering connects, as gold-plated or silver-plated, in addition, if the mode of taking soldering to connect, the second tinsel 7 can be processed shortly, the second tinsel 7 was positioned on outer conductor 2 tail end faces after soldering was finished, and the second tinsel 7 must be positioned at conical internal cavity 51, must not be clipped between outer conductor 2 and the bonnet 5, avoid piling up the bonnet 5 that causes because of the second tinsel 7 outer end scolding tin and assemble not in place with outer conductor 2.If the second tinsel 7 takes the mode of crimping to be connected with outer conductor 2, then outer conductor 2 can adopt the lower ternary alloy three-partalloy of the relative gold, silver of price to electroplate, and can reduce production costs to a certain extent.
Electroplating processes is all passed through on the first tinsel 6 and the second tinsel 7 surfaces, electrodeposited coating is gold or silver-colored, the middle part of described the first tinsel 6 and the second tinsel 7 all is in the state that freely relaxes, the first tinsel 6, the second tinsel 7 is little and thin and quality is softer, has certain flexibility, can carry out slight activity, the weld failure at resistance two ends guarantees the reliability that resistance connects when preventing from producing slight relative displacement between inner wire 1, outer conductor 2, the insulator 4.Resistance 3 is lamped element, can select 0402 or 0603 standard specification size.Consider radio-frequency performance, described the first tinsel 6 and described the second tinsel 7 are in the size that stays the slight displacement of enough adjustings, guaranteeing should be as far as possible short and small in the situation of working properly and proof load connection reliability, makes the distance between inner wire 1 and the outer conductor 2 substantially suitable with resistance length.
Be the structural representation that the utility model radio frequency coaxial load structure is used for the QMA interface as shown in figure 12, it is QMA-Female that its difference with the third execution mode is to input coaxial interface.Inner wire 1 is fixing by annular knurl and the insulator 4 at cylindrical middle part, outer conductor 2 is fixed with 4 rivet clasps of insulator, one utmost point of resistance 3 is connected with inner wire 1 tail end face soldering, another utmost point of resistance 3 is connected with the inner soldering of the second tinsel 7, the outer end of the second tinsel 7 is connected with the rear end face soldering of outer conductor 2, and all the other features are identical with the third execution mode or similar.
Be the structural representation that the utility model radio frequency coaxial load structure is used for the MCX interface as shown in figure 13, it is MCX-Female that its difference with the first execution mode is to input coaxial interface.Inner wire 1 is fixing by cylindrical middle part hangnail and insulator 4, and block insulator 4 with step outer conductor 2 rear ends, and front end is split rivet clasp and decided insulator 4.One utmost point of resistance 3 is connected with inner wire 1 tail end face soldering by the first tinsel 6, and another utmost point of resistance 3 used the second tinsel 7 to be connected with the rear end face soldering of outer conductor 2, and all the other features are identical with the first execution mode or similar.
Same method can be used for SMA, SMP, MMBX, the middle-size and small-size connector such as MMCX (according to the experiment that the SMA interface is done, in the DC-6GHz frequency range, can reach standing wave ratio VSWR＜1.05).
The radio frequency coaxial load that the utility model relates to provides the structure that a kind of volume is little, easy to connect, economical and practical and reliability is high, solved the problem that existing radio frequency coaxial load volume is large, processing cost is high, greatly improved the reliability that connects between each parts, the surplus that certain activity is arranged in real work, guarantee simultaneously the electrical property of radio frequency coaxial load, applied widely, practical.And the resistance in this radio frequency coaxial load 3 adopts standardized element, and standard interface is all adopted at the interface of inner wire 1, outer conductor 2, insulator 4, has improved series of products generalization degree when improving reliability.In sum, the utility model has effectively overcome shortcoming of the prior art, simple, convenient, economic, the general and tool actual application value of its syndeton.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not is used for restriction the utility model.Any person skilled in the art scholar all can be under spirit of the present utility model and category, and above-described embodiment is modified or changed.Therefore, have in the technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of finishing under spirit that the utility model discloses and the technological thought, must be contained by claim of the present utility model.
Claims (10)
1. radio frequency coaxial load structure, described radio frequency coaxial load structure comprises inner wire (1), outer conductor (2), resistance (3), insulator (4) and bonnet (5), described inner wire (1), insulator (4), outer conductor (2) is from inside to outside coaxial manner and is arranged in order, described bonnet (5) is connected with described outer conductor (2) afterbody, it is characterized in that: described inner wire (1), insulator (4), the rear end face of outer conductor (2) is on same plane, described resistance (3) is pellet resistance, the bottom surface of resistance (3) is the two ends that the two poles of the earth of plane and resistance (3) are arranged on described bottom surface, one utmost point of resistance (3) is electrically connected with the rear end face of inner wire (1), and another utmost point of resistance (3) is electrically connected with the rear end face of outer conductor (2).
2. radio frequency coaxial load structure according to claim 1, it is characterized in that: a utmost point of described resistance (3) is connected with an end of a tinsel, the other end of tinsel is electrically connected with the rear end face of described inner wire (1) or outer conductor (2), and the mid portion of tinsel is movable.
3. radio frequency coaxial load structure according to claim 2, it is characterized in that: a utmost point of described resistance (3) is connected with the outer end of the first tinsel (6), and the inner of the first tinsel (6) is electrically connected with the rear end face of described inner wire (1); Another utmost point of described resistance (3) is connected with the inner of the second tinsel (7), and the outer end of the second tinsel (7) is electrically connected with the rear end face of described outer conductor (2).
4. radio frequency coaxial load structure according to claim 3, it is characterized in that: the rear end face center of described inner wire (1) is provided with a location boss (11), the inner of described the first tinsel (6) is provided with a location hole (61), and described location hole (61) is enclosed within described positioning boss (11) upward and is welded and fixed.
5. radio frequency coaxial load structure according to claim 3, it is characterized in that: described bonnet (5) adopts interference fit to be connected with the afterbody of outer conductor (2) or is threaded, and the outer end of described the second tinsel (7) is clamped between bonnet (5) and the outer conductor (2).
6. radio frequency coaxial load structure according to claim 3, it is characterized in that: the outer end soldering of described the second tinsel (7) is on the rear end face of outer conductor (2).
7. radio frequency coaxial load structure according to claim 1, it is characterized in that, described insulator (4) outer cylinder is provided with a circumferential recess (41), described outer conductor (2) inwall is provided with an annular boss (21), and the annular boss (21) on the described outer conductor (2) embeds in the circumferential recess (41) on the described insulator (4).
8. radio frequency coaxial load structure according to claim 1 is characterized in that, described bonnet (5) inside is provided with a conical internal cavity (51).
9. radio frequency coaxial load structure according to claim 2, it is characterized in that: the surface of described tinsel is provided with electrodeposited coating.
10. radio frequency coaxial load structure according to claim 1 is characterized in that: described inner wire (1) excircle is provided with and inserts insulator (4) inner hangnail (12) or annular knurl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400322 CN202749489U (en) | 2012-08-13 | 2012-08-13 | Radio-frequency coaxial load structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400322 CN202749489U (en) | 2012-08-13 | 2012-08-13 | Radio-frequency coaxial load structure |
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| Publication Number | Publication Date |
|---|---|
| CN202749489U true CN202749489U (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220400322 Expired - Lifetime CN202749489U (en) | 2012-08-13 | 2012-08-13 | Radio-frequency coaxial load structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700956A (en) * | 2013-12-25 | 2014-04-02 | 湖北日海通讯技术有限公司 | Coaxial connector |
| CN104022380A (en) * | 2014-05-15 | 2014-09-03 | 镇江市明基电子有限公司 | Radio frequency coaxial connector internal conductor |
| CN104716415A (en) * | 2013-12-14 | 2015-06-17 | 江苏宏信电子科技有限公司 | F-type radio-frequency coaxial terminal load and manufacturing method thereof |
| CN105680121A (en) * | 2016-01-14 | 2016-06-15 | 西安金波科技有限责任公司 | Millimeter wave antenna head, assembly method thereof and antenna applying millimeter wave antenna head |
| CN109786913A (en) * | 2019-03-22 | 2019-05-21 | 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 |
| CN115084812A (en) * | 2022-06-26 | 2022-09-20 | 陕西华达科技股份有限公司 | Parallel resistance miniaturization welding type coaxial load structure |
-
2012
- 2012-08-13 CN CN 201220400322 patent/CN202749489U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716415A (en) * | 2013-12-14 | 2015-06-17 | 江苏宏信电子科技有限公司 | F-type radio-frequency coaxial terminal load and manufacturing method thereof |
| CN103700956A (en) * | 2013-12-25 | 2014-04-02 | 湖北日海通讯技术有限公司 | Coaxial connector |
| CN104022380A (en) * | 2014-05-15 | 2014-09-03 | 镇江市明基电子有限公司 | Radio frequency coaxial connector internal conductor |
| CN105680121A (en) * | 2016-01-14 | 2016-06-15 | 西安金波科技有限责任公司 | Millimeter wave antenna head, assembly method thereof and antenna applying millimeter wave antenna head |
| CN105680121B (en) * | 2016-01-14 | 2018-07-03 | 西安金波科技有限责任公司 | A kind of millimeter wave antenna head and its assembly method and composition antenna |
| CN109786913A (en) * | 2019-03-22 | 2019-05-21 | 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 |
| CN109786913B (en) * | 2019-03-22 | 2023-09-01 | 西安雷航电子信息技术有限公司 | Radio frequency coaxial load based on thin film resistor |
| CN115084812A (en) * | 2022-06-26 | 2022-09-20 | 陕西华达科技股份有限公司 | Parallel resistance miniaturization welding type coaxial load structure |
| CN115084812B (en) * | 2022-06-26 | 2024-03-22 | 陕西华达科技股份有限公司 | Parallel resistor miniaturized welding type coaxial load structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20130220 |
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| CX01 | Expiry of patent term |