CN112670689B - Ka frequency channel low-loss waveguide microstrip transition assembly - Google Patents
Ka frequency channel low-loss waveguide microstrip transition assembly Download PDFInfo
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Abstract
The invention provides a Ka frequency band low-loss waveguide microstrip transition component, which comprises a step platform, a detachable waveguide body arranged at the bottom of the step platform, a waveguide upper cover arranged at the upper part of the waveguide body and a radio frequency microstrip line connected with the step platform, wherein the step platform is embedded into the waveguide body; the step platform comprises a step platform body, a coaxial probe and a step platform base which are integrally arranged, wherein the coaxial probe extends out of the waveguide body and is welded with the radio frequency microstrip line. The invention aims to solve the problems of large size and complex assembly process of the existing waveguide microstrip transition component, and provides a novel low-loss waveguide microstrip transition component which is mainly used for connecting a waveguide structure and a radio frequency microstrip line.
Description
Technical Field
The invention relates to the technical field of waveguide type coupling devices, in particular to a Ka frequency band low-loss waveguide microstrip transition component.
Background
With the rapid development of microwave devices, microwave millimeter wave circuits are more and more widely applied, and the influence of transmission line loss on system indexes is more and more obvious. The connection between the traditional waveguide and the radio frequency glass bead generally adopts a probe coupling form directly, but the form has larger size and is not suitable for being applied to a miniaturized circuit. The invention uses the step platform to transit the rectangular waveguide to the coaxial probe, and then the coaxial probe is welded on the microstrip line. Because Ka frequency channel waveguide size is less, easily leads to the short circuit of radio frequency glass pearl in the assembly stair platform in-process, for solving this problem, design coaxial probe and stair platform structure as an organic whole, fix the stair platform through the screw, reduce the welding process to split into two parts with the waveguide, make the assembly process visual, improve assembly efficiency greatly, and through the form of design "track" on the waveguide apron, improve the assembly precision.
Disclosure of Invention
The invention aims to solve the problems of large size and complex assembly process of the existing waveguide microstrip transition component, and provides a novel low-loss waveguide microstrip transition component which is mainly used for connecting a waveguide structure and a radio frequency microstrip line.
The invention provides a Ka frequency band low-loss waveguide microstrip transition component, which comprises a step platform, a detachable waveguide body arranged at the bottom of the step platform, a waveguide upper cover arranged at the upper part of the waveguide body and a radio frequency microstrip line connected with the step platform, wherein the step platform is embedded into the waveguide body;
the ladder platform comprises a ladder platform body, a coaxial probe and a ladder platform base, wherein the side surface of the ladder platform body is provided with a boss;
the coaxial probe extends out of the waveguide body and is welded with the radio frequency microstrip line.
The invention provides a Ka frequency band low-loss waveguide microstrip transition component which is characterized in that as an optimal mode, a first step, a second step and a third step are sequentially arranged on a step platform body from top to bottom, a boss is arranged on the side face of the first step, and the upper surface of the boss is higher than that of the first step.
The invention provides a Ka frequency band low-loss waveguide microstrip transition component, which is used as an optimal mode, wherein a groove corresponding to a step platform base is arranged in the middle of a waveguide body; the side part of the waveguide body is provided with a through hole corresponding to the coaxial probe; the top of the waveguide body is provided with a sliding block groove and a threaded hole; the waveguide body and the step platform are fixedly connected by using screws.
The invention provides a Ka frequency band low-loss waveguide microstrip transition component, which is characterized in that as an optimal mode, a waveguide upper cover is provided with a slider protrusion corresponding to a slider groove and a through hole corresponding to a threaded hole, and a waveguide body is fixedly connected with the waveguide upper cover by using a screw.
The invention provides a Ka frequency band low-loss waveguide microstrip transition component, which is preferably characterized in that the length of a coaxial probe is 3.27mm, the diameter of the coaxial probe is 0.5mm, the length of a step platform base is 8.73mm, the width of the step platform base is 2.8mm, the height of the step platform base is 2mm, and the width of a groove is 2.85 mm.
The invention provides a Ka frequency band low-loss waveguide microstrip transition component, which is preferably characterized in that the widths of a first step, a second step and a third step are all 1.8mm, and the length of the third step is 7.65 mm.
The invention provides a Ka frequency band low-loss waveguide microstrip transition component, which is preferably provided with two sliding block grooves and two sliding block bulges.
The invention provides a Ka frequency band low-loss waveguide microstrip transition component, which is an optimal mode, wherein the length of a slide block bulge is 11.7mm, the width of the slide block bulge is 1mm, the height of the slide block bulge is 0.5mm, the distance between the two slide block bulges is 9.7mm,
the invention provides a Ka frequency band low-loss waveguide microstrip transition component which is in an optimal mode, wherein two threaded holes and two through holes are formed, and the distance between the two threaded holes is 4 mm.
The invention provides a method for setting, manufacturing and assembling a Ka frequency band low-loss waveguide microstrip transition component, which comprises the following steps as an optimal mode:
s1, simulation model: designing the size of a step platform, simulating the size of the step platform in a computer, transferring a waveguide body to a coaxial probe, then cascading a radio frequency microstrip line to obtain a simulation model, calculating S parameters of the simulation model, confirming the insertion loss and the return loss of the simulation model, adjusting the simulation model according to the insertion loss and the return loss, and finishing the establishment of the simulation model;
s2, preparation: manufacturing a step platform and a waveguide body according to the simulation model;
s3, manufacturing the waveguide cover plate size: manufacturing a waveguide upper cover, arranging a slider protrusion used as a track on the waveguide upper cover, positioning a slider groove of the waveguide upper cover corresponding to the slider protrusion when the waveguide body is arranged for assembly, arranging a through hole on the waveguide upper cover, and arranging a threaded hole for fixing the waveguide upper cover on the position of the waveguide body corresponding to the through hole;
s4, assembling: and pushing the step platform into the waveguide body and fixing the step platform by using a screw, welding the coaxial probe with the radio frequency microstrip line, finally pushing the waveguide upper cover into the upper part of the waveguide body through the slider protrusion and the slider groove, and fixing the waveguide body and the waveguide upper cover by using the screw through the threaded hole and the through hole.
Simulation results show that the insertion loss of the waveguide microstrip transition component is lower than 0.15dB in the range of 30-40 GHz, and the return loss is larger than 16 dB.
The Ka band is a part of the microwave band of the electromagnetic spectrum, the frequency range of which is 26.5-40 GHz. The Ka band, also known as the 30/20GHz band, is commonly used for satellite communications. Therefore, the invention is suitable for Ka frequency band microwave and millimeter wave integrated circuits.
The invention has the following advantages:
(1) the transmission performance is good: simulation results show that the insertion loss of the waveguide microstrip transition component is less than 0.3dB in the range of 30-40 GHz, the return loss is greater than 15dB, and the waveguide microstrip transition component is suitable for being used in a broadband range.
(2) The assembly precision is high: according to the invention, through the integrated arrangement of the coaxial probe and the step platform and the arrangement of the waveguide upper cover slide block protrusion and the waveguide body upper slide block groove, the assembly process is simplified, the assembly precision is improved, and the manufacturing cost is reduced.
(3) The adaptability is wide: the structure of the invention is suitable for Ka frequency band microwave and millimeter wave integrated circuits, can extend to other frequency bands, and can be used for large-scale production.
Drawings
FIG. 1 is a simulation model diagram of embodiment 1 of a Ka-band low-loss waveguide microstrip transition assembly;
FIG. 2 is an assembly view of a stepped platform in embodiment 1 of a Ka-band low-loss waveguide microstrip transition assembly;
FIG. 3 is a structure diagram of a waveguide upper cover of embodiment 1 of a Ka-band low-loss waveguide microstrip transition assembly;
FIG. 4 is a simulation model diagram of embodiments 2-3 of a Ka-band low-loss waveguide microstrip transition assembly;
FIG. 5 is a structure diagram of a step-table of embodiment 2-3 of a Ka-band low-loss waveguide microstrip transition component;
FIG. 6 is an assembly view of a step-shaped platform of embodiment 2-3 of a Ka-band low-loss waveguide microstrip transition assembly;
FIG. 7 is a structure diagram of the waveguide upper cover of embodiment 2-3 of a Ka-band low-loss waveguide microstrip transition component;
FIG. 8 is a simulation result diagram of insertion loss of embodiment 3 of a Ka-band low-loss waveguide microstrip transition component;
fig. 9 is a simulation result diagram of return loss of embodiment 3 of a Ka-band low-loss waveguide microstrip transition component.
Reference numerals:
1. a stair step; 11. a stair step body; 111. a first step; 112. a second step; 113. a third step (113); 114. a boss; 12. a coaxial probe; 13. a stair platform base; 2. a waveguide body; 21. a groove; 22. a through hole; 23. a slider groove; 24. a threaded hole; 3. a waveguide upper cover; 31. the slide block is raised; 32. a through hole; 4. a radio frequency microstrip line.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
As shown in fig. 1-3, a Ka band low loss waveguide microstrip transition module is characterized in that: the waveguide structure comprises a step platform 1, a waveguide body 2 which is detachably arranged at the bottom of the step platform 1, a waveguide upper cover 3 which is arranged at the upper part of the waveguide body 2 and a radio frequency microstrip line 4 which is connected with the step platform 1, wherein the step platform 1 is embedded into the waveguide body 2, and the waveguide upper cover 3 is detachably arranged at the top of the waveguide body 2 and wraps the step platform 1 in the waveguide body 2;
the stair platform 1 comprises a stair platform body 11 with a boss on the side surface, a coaxial probe 12 arranged on the side part of the boss and a stair platform base 13 arranged at the bottom of the stair platform body 11, wherein the stair platform body 11, the coaxial probe 12 and the stair platform base 13 are integrally arranged;
the step body 11 extends out of the waveguide body 2 and is welded with the radio frequency microstrip line 4.
Example 2
As shown in fig. 4-7, a Ka band low loss waveguide microstrip transition module is characterized in that: the waveguide structure comprises a step platform 1, a waveguide body 2 which is detachably arranged at the bottom of the step platform 1, a waveguide upper cover 3 which is arranged at the upper part of the waveguide body 2 and a radio frequency microstrip line 4 which is connected with the step platform 1, wherein the step platform 1 is embedded into the waveguide body 2, and the waveguide upper cover 3 is detachably arranged at the top of the waveguide body 2 and wraps the step platform 1 in the waveguide body 2;
as shown in fig. 4 and 5, the step 1 includes a step body 11 with a boss on the side, a coaxial probe 12 arranged on the side of the boss, and a step base 13 arranged at the bottom of the step body 11, wherein the step body 11, the coaxial probe 12 and the step base 13 are integrally arranged;
the step body 11 extends out of the waveguide body 2 and is welded with the radio frequency microstrip line 4.
The stair platform body 11 is sequentially provided with a first step 111, a second step 112 and a third step 113 from top to bottom, and a boss 114 is arranged on the side surface of the first step;
as shown in fig. 6, the waveguide body 2 is provided with a groove 21 corresponding to the terrace base 13 at the middle part; the side part of the waveguide body 2 is provided with a through hole 22 corresponding to the coaxial probe 12; the top of the waveguide body 2 is provided with a slide block groove 23 and a threaded hole 24; the waveguide body 2 and the step platform 1 are fixedly connected by using screws;
as shown in fig. 7, the waveguide upper cover 3 is provided with a slider projection 31 corresponding to the slider groove 23 and a through hole 32 corresponding to the position of the screw hole 24, and the waveguide body 2 and the waveguide upper cover 3 are fixedly connected using a screw.
Example 3
As shown in fig. 4-9, a Ka band low loss waveguide microstrip transition module is characterized in that: the waveguide structure comprises a step platform 1, a waveguide body 2 which is detachably arranged at the bottom of the step platform 1, a waveguide upper cover 3 which is arranged at the upper part of the waveguide body 2 and a radio frequency microstrip line 4 which is connected with the step platform 1, wherein the step platform 1 is embedded into the waveguide body 2, and the waveguide upper cover 3 is detachably arranged at the top of the waveguide body 2 and wraps the step platform 1 in the waveguide body 2;
the stair platform 1 comprises a stair platform body 11 with a boss on the side surface, a coaxial probe 12 arranged on the side part of the boss and a stair platform base 13 arranged at the bottom of the stair platform body 11, wherein the stair platform body 11, the coaxial probe 12 and the stair platform base 13 are integrally arranged;
the step body 11 extends out of the waveguide body 2 and is welded with the radio frequency microstrip line 4.
As shown in fig. 4 and 5, the step body 11 is provided with a first step 111, a second step 112 and a third step 113 from top to bottom in sequence, and a boss 114 is provided on a side surface of the first step;
the length of the step platform body 11 is 3.27mm, the diameter of the step platform body 11 is 0.5mm, the length of the step platform base 13 is 8.73mm, the width of the step platform base 13 is 2.8mm, the height of the step platform base 13 is 2mm, and the width of the groove 21 is 2.85 mm.
The widths of the first step 111, the second step 112 and the third step 113 are all 1.8mm, and the length of the third step 113 is 7.65 mm;
as shown in fig. 6, the waveguide body 2 is provided with a groove 21 corresponding to the terrace base 13 at the middle part; the side part of the waveguide body 2 is provided with a through hole 22 corresponding to the coaxial probe 12; the top of the waveguide body 2 is provided with a slide block groove 23 and a threaded hole 24; the waveguide body 2 and the step 1 are fixedly connected using screws.
As shown in fig. 7, the waveguide upper cover 3 is provided with a slider projection 31 corresponding to the slider groove 23 and a through hole 32 corresponding to the position of the screw hole 24, and the waveguide body 2 and the waveguide upper cover 3 are fixedly connected using a screw.
The number of the slider grooves 23 and the slider protrusions 31 is two.
The length of the sliding block bulge 31 is 11.7mm, the width of the sliding block bulge 31 is 1mm, the height of the sliding block bulge 31 is 0.5mm, the distance between the two sliding block bulges 31 is 9.7mm,
the threaded holes 24 and the through holes 32 are two in number, and the distance between the two threaded holes 24 is 4 mm.
As shown in FIGS. 8-9, simulation results show that the insertion loss of the present embodiment is lower than 0.15dB and the return loss is greater than 16dB in the range of 30-40 GHz.
The present embodiment is suitable for Ka band microwave and millimeter wave integrated circuits.
The method of configuring, fabricating, and assembling of embodiments 1-3, comprising the steps of:
s1, simulation model: designing the size of a step platform 1, simulating the size of the step platform 1 in a computer, transferring a waveguide body 2 to a coaxial probe 12, then cascading a radio frequency microstrip line 4 to obtain a simulation model, calculating S parameters of the simulation model, confirming the insertion loss and return loss of the simulation model, adjusting the simulation model according to the insertion loss and return loss, and finishing the establishment of the simulation model;
s2, preparation: manufacturing a step platform 1 and a waveguide body 2 according to a simulation model;
s3, manufacturing the waveguide cover plate size: manufacturing a waveguide upper cover 3, arranging a slider protrusion 31 serving as a track on the waveguide upper cover 3, arranging a slider groove 23 corresponding to the slider protrusion 31 and used for positioning the waveguide upper cover 3 during assembly on the waveguide body 2, arranging a through hole 32 on the waveguide upper cover 3, and arranging a threaded hole 24 used for fixing the waveguide upper cover 3 on the waveguide body 2 corresponding to the through hole 32;
s4, assembling: the step platform 1 is pushed into the waveguide body 2 and fixed by screws, the coaxial probe 12 is welded with the radio frequency microstrip line 4, finally the waveguide upper cover 3 is pushed into the upper part of the waveguide body 2 through the slider protrusion 31 and the slider groove 23, and the waveguide body 2 and the waveguide upper cover 3 are fixed by screws through the threaded holes 24 and the through holes 32.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A Ka frequency channel low-loss waveguide microstrip transition assembly is characterized in that: the waveguide structure comprises a step (1), a waveguide body (2) detachably arranged at the bottom of the step (1), a waveguide upper cover (3) arranged at the upper part of the waveguide body (2) and a radio frequency microstrip line (4) connected with the step (1), wherein the step (1) is embedded into the waveguide body (2), the waveguide upper cover (3) is detachably arranged at the top of the waveguide body (2) and wraps the step (1) in the waveguide body (2);
the stair platform (1) comprises a stair platform body (11) with a boss on the side surface, coaxial probes (12) arranged on the side part of the boss and a stair platform base (13) arranged at the bottom of the stair platform body (11), wherein the stair platform body (11), the coaxial probes (12) and the stair platform base (13) are integrally arranged;
the coaxial probe (12) extends out of the waveguide body (2) and is welded with the radio frequency microstrip line (4);
the stair platform body (11) is sequentially provided with a first step (111), a second step (112) and a third step (113) from top to bottom, and a boss (114) is arranged on the side surface of the first step;
a groove (21) corresponding to the step platform base (13) is formed in the middle of the waveguide body (2); a through hole (22) corresponding to the coaxial probe (12) is formed in the side part of the waveguide body (2); the top of the waveguide body (2) is provided with a sliding block groove (23) and a threaded hole (24); the waveguide body (2) and the step platform (1) are fixedly connected by using screws;
the waveguide upper cover (3) is provided with a slider protrusion (31) corresponding to the slider groove (23) and a through hole (32) corresponding to the threaded hole (24), and the waveguide body (2) is fixedly connected with the waveguide upper cover (3) through screws;
the setting, manufacturing and assembling method comprises the following steps:
s1, simulation model: designing the size of the step platform (1), simulating the size of the step platform (1) in a computer, transferring the waveguide body (2) to the coaxial probe (12), then cascading the radio frequency microstrip line (4) to obtain a simulation model, calculating an S parameter of the simulation model, confirming the insertion loss and the return loss of the simulation model, adjusting the simulation model according to the insertion loss and the return loss, and finishing the establishment of the simulation model;
s2, preparation: manufacturing the step platform (1) and the waveguide body (2) according to the simulation model;
s3, manufacturing the waveguide cover plate size: manufacturing the waveguide upper cover (3), arranging the slider protrusion (31) used as a track on the waveguide upper cover (3), positioning the slider groove (23) of the waveguide upper cover (3) corresponding to the slider protrusion (31) when the waveguide body (2) is arranged for assembly, arranging the through hole (32) on the waveguide upper cover (3), and arranging the threaded hole (24) used for fixing the waveguide upper cover (3) on the waveguide body (2) corresponding to the through hole (32);
s4, assembling: pushing the stepped platform (1) into the waveguide body (2) and fixing the stepped platform by using a screw, welding the coaxial probe (12) and the radio frequency microstrip line (4), pushing the waveguide upper cover (3) into the upper part of the waveguide body (2) through the slider protrusion (31) and the slider groove (23), and fixing the waveguide body (2) and the waveguide upper cover (3) by using a screw through the threaded hole (24) and the through hole (32).
2. The Ka frequency band low-loss waveguide microstrip transition component of claim 1, wherein: the length of coaxial probe (12) is 3.27mm, the diameter of coaxial probe (12) is 0.5mm, the length of stair platform base (13) is 8.73mm, the width of stair platform base (13) is 2.8mm, the height of stair platform base (13) is 2mm, recess (21) width 2.85 mm.
3. The Ka frequency band low-loss waveguide microstrip transition component of claim 1, wherein: the widths of the first step (111), the second step (112) and the third step (113) are all 1.8mm, and the length of the third step (113) is 7.65 mm.
4. The Ka frequency band low-loss waveguide microstrip transition component of claim 1, wherein: the number of the sliding block grooves (23) and the number of the sliding block protrusions (31) are two.
5. The Ka frequency band low-loss waveguide microstrip transition component of claim 4, wherein: the length of the slider bulge (31) is 11.7mm, the width of the slider bulge (31) is 1mm, the height of the slider bulge (31) is 0.5mm, and the distance between the slider bulge (31) is 9.7 mm.
6. The Ka frequency band low-loss waveguide microstrip transition component of claim 1, wherein: the threaded holes (24) and the through holes (32) are two, and the distance between the two threaded holes (24) is 4 mm.
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