Directional coupling assembly and directional coupler

Abstract

The embodiment of the invention provides a directional coupling assembly and a directional coupler. The directional coupling assembly comprises a first quartz glass plate and a second quartz glass plate; the first surface of the first quartz glass plate is provided with a directional coupling circuit, and the first surface and the second surface of the second quartz glass plate clamp the directional coupling circuit; a first metal layer is arranged on a third surface, opposite to the first surface, of the first quartz glass plate, and a second metal layer is arranged on a fourth surface, opposite to the second surface, of the second quartz glass plate, so that the directional coupling circuit forms a strip line.

Description

Technical Field

[0001] The invention relates to the field of signal measurement, in particular to a directional coupling component and a directional coupler. Background Art

[0002] Directional coupler is a universal microwave / millimeter wave component, which is used to distribute or synthesize microwave signal power and has directional coupling characteristics. It can be used for signal isolation, separation and mixing, such as power monitoring, source output power stabilization, signal source isolation, transmission and reflection sweep frequency testing, etc. Summary of the invention

[0003] The embodiments of the present disclosure provide a directional coupling component and a directional coupler.

[0004] According to a first aspect of an embodiment of the present disclosure, a directional coupling component is provided, the directional coupling component comprising a first quartz glass plate and a second quartz glass plate;

[0005] A directional coupling circuit is disposed on the first surface of the first quartz glass plate, and the first surface and the second surface of the second quartz glass plate clamp the directional coupling circuit;

[0006] A first metal layer is disposed on a third surface of the first quartz glass plate opposite to the first surface, and a second metal layer is disposed on a fourth surface of the second quartz glass plate opposite to the second surface, so that the directional coupling line forms a stripline.

[0007] In some embodiments, the directional coupling line includes: a first transmission line for transmitting a signal and a second transmission line for coupling the signal; wherein the first transmission line includes: a first end for inputting the signal, a second end for outputting the signal, and a transmission section between the first end and the second end; the second transmission line includes: a coupling section for coupling the signal from the transmission section to obtain a coupled signal, and a third end and a fourth end respectively connected to both ends of the coupling section, wherein the third end is used to output the coupled signal;

[0008] The line width of the transmission segment gradually increases along the signal transmission direction, and / or the line width of the coupling segment gradually increases along the signal transmission direction, and / or the spacing distance between the transmission segment and the coupling segment gradually increases along the signal transmission direction.

[0009] In some embodiments, the directional coupling assembly further includes four connectors connected to the first end, the second end, the third end, and the fourth end respectively;

[0010] The second quartz glass plate is provided with windows at positions corresponding to the first end, the second end, the third end and the fourth end respectively;

[0011] The connection pins of the four connectors are respectively connected to the first end, the second end, the third end and the fourth end through corresponding windows.

[0012] In some embodiments, the connecting pins of the four connectors are connected to a first microstrip line formed in a corresponding window at the first end, a second microstrip line formed in a corresponding window at the second end, a third microstrip line formed in a corresponding window at the third end, and a fourth microstrip line formed in a corresponding window at the fourth end using a gold-plated tape process.

[0013] In some embodiments, the directional coupling circuit is a thin film circuit.

[0014] In some embodiments, the first metal layer and the second metal layer include at least one of the following:

[0015] Electroplated metal layer;

[0016] Thin film circuit metal layer.

[0017] In some embodiments, a thickness difference between the thickness of the first quartz glass plate and the thickness of the second quartz glass plate is less than a predetermined range.

[0018] According to a second aspect of an embodiment of the present disclosure, a directional coupler is provided, wherein the directional coupler comprises the directional coupling component according to the first aspect, a first metal shell and a second metal shell, wherein:

[0019] The first metal shell and the second metal shell form a containing cavity to contain the directional coupling component.

[0020] In some embodiments, a limiting wall is provided in the accommodating cavity to limit the lateral displacement of the directional coupling assembly.

[0021] In some embodiments, the directional coupling line includes: a first transmission line for transmitting a signal and a second transmission line for coupling the signal; wherein the first transmission line includes a first end for inputting the signal, a second end for outputting the signal, and a transmission section between the first end and the second end; the second transmission line includes a coupling section for coupling the signal from the transmission section to obtain a coupled signal, a third end and a fourth end respectively connected to two ends of the coupling section, wherein the third end is used to output the coupled signal;

[0022] The side wall of the accommodating cavity is respectively provided with through holes at corresponding positions of the first end, the second end, the third end and the fourth end;

[0023] The four connectors penetrate the corresponding through holes and are respectively connected to the first end, the second end, the third end and the fourth end.

[0024] In some embodiments, the connector and the corresponding through hole are fixed by threaded fitting.

[0025] In some embodiments, the first metal surface of the first metal shell is bonded to the first metal layer of the third surface, or the second metal surface of the second metal shell is bonded to the second metal layer of the fourth surface; the first metal surface faces the third surface, and the second metal surface faces the fourth surface.

[0026] According to an embodiment of the present disclosure, the directional coupling assembly includes a first quartz glass plate and a second quartz glass plate;

[0027] A directional coupling circuit is arranged on the first surface of the first quartz glass plate, and the first surface and the second surface of the second quartz glass plate clamp the directional coupling circuit; a first metal layer is arranged on the third surface of the first quartz glass plate opposite to the first surface, and a second metal layer is arranged on the fourth surface of the second quartz glass plate opposite to the second surface, so that the directional coupling circuit forms a strip line. In this way, the directional coupling circuit located on the surface of the first quartz glass plate is clamped between the first quartz glass plate and the second quartz glass plate by the first quartz glass plate and the second quartz glass plate, so that a stable dielectric layer is formed around the directional coupling circuit. Since the processing precision of the quartz glass plate and the directional coupling circuit is high, on the one hand, the directional coupling component has high processing precision and consistency, which can improve the coupling performance, coupling stability and consistency between different directional coupling components. On the other hand, the directional coupling component has high processing precision and consistency, which can reduce the cost of adjusting each directional coupling component and improve the yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of a directional coupling component structure according to an exemplary embodiment;

[0029] Figure 2 is a schematic diagram of a directional coupling component structure according to an exemplary embodiment;

[0030] Figure 3 is a schematic diagram of a directional coupling component structure according to an exemplary embodiment;

[0031] Figure 4 is a schematic diagram of a directional coupling component structure according to an exemplary embodiment;

[0032] Figure 5 is a schematic diagram of a directional coupling component structure according to an exemplary embodiment;

[0033] Figure 6 is a schematic diagram of a directional coupling component structure according to an exemplary embodiment;

[0034] Figure 7 is a schematic diagram of a directional coupler structure according to an exemplary embodiment;

[0035] Figure 8 is a schematic diagram showing measurement results of a directional coupler according to an exemplary embodiment;

[0036] Fig. 9 is a schematic diagram of a directional coupler measurement result according to an exemplary embodiment. DETAILED DESCRIPTION

[0037] In order to make the technical solutions and beneficial effects of the present invention more clearly understandable, the following is a detailed description by listing specific embodiments. The drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0038] The embodiments of the present disclosure are not exhaustive, but are only illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0039] In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

[0040] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0041] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun after the article may be understood as a singular expression or a plural expression.

[0042] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0043] In some embodiments, the terms "at least one", "one or more", "aplurality of", "multiple", etc. can be used interchangeably.

[0044] In some embodiments, "at least one of A and B", "A and / or B", "A in one case, B in another case", "A in one case, B in another case", etc., may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0045] In some embodiments, the recording method of "A or B" may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0046] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute restrictions on the position, order, priority, value or content of the description objects. The statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute redundant restrictions due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields", and the "first" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the numerical value of the description object is not limited by the ordinal number, and can be one or more. Taking the "first device" as an example, the numerical value of the "device" can be one or more. In addition, the objects modified by different prefixes may be the same or different. For example, if the description object is "device", then the "first device" and the "second device" may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information", then the "first information" and the "second information" may be the same information or different information, and their contents may be the same or different.

[0047] In some embodiments, “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0048] In some embodiments, terms such as “…”, “determine…”, “in the case of…”, “at the time of…”, “when…”, “if…”, “if…”, etc. can be used interchangeably.

[0049] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0050] In addition, each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns may also be implemented as an independent embodiment.

[0051] Among the existing vector network analyzers, most of them use cavity mechanical directional couplers or directional bridges, especially high-end vector network analyzers with frequencies above 50GHz, which all use cavity mechanical directional couplers.

[0052] The cavity mechanical directional coupler adopts an air stripline structure. The positions of the two coupling rods are fixed by positioning screws and dielectric positioning columns, so that they are in the upper and lower center positions in the mechanical cavity, and then the coupling rods are contact-connected by elastic connectors. This design structure has some defects. 1. There are many structural parts, complex design, and low assembly efficiency. 2. Poor consistency. The positions of the two coupling rods must be maintained in the center of the cavity. The tolerance of the structural parts requires the performance to be adjusted one by one, which takes a lot of time and has a low yield rate.

[0053] Therefore, how to simplify the structure of the directional coupler, improve component accuracy, and enhance performance stability is an urgent problem to be solved.

[0054] like Figure 1 and Figure 2 As shown, a directional coupling component 100 shown in an embodiment of the present disclosure includes a first quartz glass plate 110 and a second quartz glass plate 120;

[0055] A directional coupling line 112 is disposed on the first surface 111 of the first quartz glass plate 110, and the first surface 111 and the second surface 121 of the second quartz glass plate 120 clamp the directional coupling line 112;

[0056] A first metal layer 114 is disposed on a third surface 113 of the first quartz glass plate 110 opposite to the first surface 111 , and a second metal layer 123 is disposed on a fourth surface 122 of the second quartz glass plate 120 opposite to the second surface 121 , so that the directional coupling line 112 forms a stripline.

[0057] Here, the directional coupling component 100 may be a component in the directional coupler 10 for realizing signal coupling.

[0058] In a possible implementation, the first quartz glass plate 110 and the second quartz glass plate 120 are made of silicon dioxide.

[0059] In a possible implementation, the directional coupling line 112 may be disposed on the first surface 111 by printing or other methods.

[0060] In a possible implementation, the directional coupling circuit 112 may be obtained by laser engraving and / or etching a metal film attached to the first surface 111 .

[0061] In some embodiments, the directional coupling circuit 112 is a thin film circuit.

[0062] This embodiment does not limit the method for making thin film circuits. Here is an example of a method for making thin film circuits. The thin film circuit can be made by using a first quartz glass plate 110 as a substrate. A uniform metal film is formed on the surface of the substrate by chemical or physical methods. Then, using photolithography technology, a layer of photoresist is coated on the surface of the metal film, and then exposure, development and other steps are performed to transfer the circuit pattern to be formed (such as the directional coupling circuit 112 pattern) to the surface of the film. In this way, the pattern formation of the thin film circuit is completed. After the directional coupling circuit 112 pattern is formed, the film needs to be corroded and metal deposited. Corrosion refers to corroding the unnecessary film layer by chemical methods to expose the substrate or the manufactured circuit (such as the directional coupling circuit 112 pattern) below. Metal deposition is to deposit a layer of metal on the surface of the film to form the conductor of the circuit (such as the directional coupling circuit 112 pattern). Finally, the film needs to be etched, cleaned and other steps to finally complete the production of the thin film circuit.

[0063] The process accuracy of the thin film circuit can reach 1 micron, so the manufacturing accuracy of the directional coupling line 112 is improved. The high precision improves the high-frequency performance of the coupler and improves the performance stability and consistency of the directional coupler 10.

[0064] In a possible implementation, the first quartz glass plate 110 and the second quartz glass plate 120 can clamp the directional coupling line 112 by external pressure.

[0065] In a possible implementation, the first quartz glass plate 110 and the second quartz glass plate 120 may be bonded together, such as by gluing, to clamp the directional coupling line 112 .

[0066] In a possible implementation, the third surface 113 of the first quartz glass plate 110 and the fourth surface 122 of the second quartz glass plate 120 may be provided with a metal layer by printing, electroplating and / or electroplating.

[0067] In some embodiments, the first metal layer 114 and the second metal layer 123 include at least one of the following:

[0068] Electroplated metal layer; thin film circuit metal layer.

[0069] The two outer surfaces (the third surface 113 and the fourth surface 122) of the directional coupling component 100, the first quartz glass plate 110, the second quartz glass plate 120 and the directional coupling line 112 form a stable stripline structure. There is no need to coordinate and optimize one by one, which greatly saves manpower and time costs and improves the yield. The directional coupling line 112 is a stripline. The stripline has good EMI characteristics, so the coupling performance of the directional coupling line 112 can be improved. In this way, the directional coupling component 100 can have good coupling performance and anti-interference ability.

[0070] Quartz glass has a relatively low dielectric constant, usually between 3.5 and 3.7. Quartz glass also has good thermal stability and a relatively low thermal collision coefficient. Quartz glass is also suitable for high-precision processing. Therefore, the first quartz glass plate 110 and the second quartz glass plate 120 as coupling media can improve the coupling performance and coupling stability of high-frequency signals.

[0071] In some embodiments, a thickness difference between the thickness of the first quartz glass plate 110 and the thickness of the second quartz glass plate 120 is less than a predetermined range.

[0072] In a possible implementation, the predetermined range is 0% to 10%. For example, the difference between the thickness of the first quartz glass plate 110 and the thickness of the second quartz glass plate 120 is less than 10% of the thickness of the first quartz glass plate 110 .

[0073] In a possible implementation, the predetermined range is 0% to 5%.

[0074] In a possible implementation, the first quartz glass plate 110 and the second quartz glass plate 120 may have the same thickness, such as 0.127 mm.

[0075] In this way, the directional coupling line 112 located on the surface of the first quartz glass plate 110 is clamped between the first quartz glass plate 110 and the second quartz glass plate 120, so that a stable dielectric layer is formed around the directional coupling line 112. Since the processing precision of the quartz glass plate and the directional coupling line 112 is high, on the one hand, the directional coupling component 100 has high processing precision and consistency, which can improve the coupling performance, coupling stability and consistency between different directional coupling components 100. On the other hand, the directional coupling component 100 has high processing precision and consistency, which can reduce the cost of adjusting each directional coupling component 100 and improve the yield.

[0076] In some embodiments, Figure 3As shown, the directional coupling line 112 includes: a first transmission line 1121 for transmitting a signal and a second transmission line 1122 for coupling the signal; wherein the first transmission line 1121 includes: a first end 11211 for inputting the signal, a second end 11212 for outputting the signal, and a transmission section 11213 between the first end 11211 and the second end 11212; the second transmission line 1122 includes: a coupling section 11223 for coupling the signal from the transmission section 11213 to obtain a coupled signal, and a third end 11221 and a fourth end 11222 respectively connected to both ends of the coupling section 11223, wherein the third end 11221 is used to output the coupled signal;

[0077] Among them, the line width of the transmission segment 11213 gradually increases along the signal transmission direction, and / or the line width of the coupling segment 11223 gradually increases along the signal transmission direction, and / or the spacing distance between the transmission segment 11213 and the coupling segment 11223 gradually increases along the signal transmission direction.

[0078] Here, the fourth terminal 11222 may be an isolation terminal of the directional coupling line 112. In actual use, a load resistor, such as a 50-ohm load resistor, may be connected.

[0079] Here, the signal flows from the first end 11211 to the second end 11212 .

[0080] In a possible implementation, the wiring length of the first end 11211, the wiring length of the second end 11212, the wiring length of the third end 11221, and / or the wiring length of the fourth end 11222 may be determined based on actual needs. For example, the wiring length of the first end 11211 and / or the wiring length of the second end 11212 may be determined based on the length of the first quartz glass plate 110 and the length of the transmission section 11213; the wiring length of the third end 11221 and / or the wiring length of the fourth end 11222 may be determined based on the length of the second quartz glass plate 120 and the length of the coupling section 11223.

[0081] In a possible implementation, the line width of the first transmission line 1121 gradually increases along the signal transmission direction.

[0082] In a possible implementation, the line width of the second transmission line 1122 gradually increases along the signal transmission direction.

[0083] like Figure 3 As shown, the transmission segment 11213 and the coupling segment 11223 extend in the same direction to enable the coupling segment 11223 to couple the signal transmitted on the transmission segment 11213 .

[0084] By changing the width of the transmission section 11213 and the coupling section 11223, the impedance of the first transmission line 1121 and the second transmission line 1122 can be gradually changed, thereby achieving better impedance matching. At the same time, the width gradient can be used to adjust the coupling degree of the coupler, that is, the power transmission ratio from a first transmission line 1121 to the second transmission line 1122. The width gradient of the transmission section 11213 and the coupling section 11223 can be designed to have a specific rate setting, so that the coupling degree of the first transmission line 1121 and the second transmission line 1122 is maximized at a specific frequency.

[0085] By changing the spacing distance between the transmission section 11213 and the coupling section 11223, the coupling performance such as coupling degree, bandwidth and impedance matching can be adjusted.

[0086] In some embodiments, the directional coupling assembly 100 further includes four connectors 130 connected to the first end 11211, the second end 11212, the third end 11221, and the fourth end 11222, respectively;

[0087] The second quartz glass plate 120 is provided with windows at positions corresponding to the first end 11211, the second end 11212, the third end 11221 and the fourth end 11222, respectively;

[0088] The connection pins 131 of the four connectors 130 are respectively connected to the first end 11211 , the second end 11212 , the third end 11221 and the fourth end 11222 through corresponding windows.

[0089] Figure 4 FIG. 1 is a schematic diagram of the first quartz glass plate 110 and the second quartz glass plate 120 after being assembled. Figure 5 for Figure 4 Magnified view of the circled A area. Figure 6 FIG. 1 is a schematic diagram of the connection of the connector 130 .

[0090] like Figure 5 As shown, windows may be provided at positions of the second quartz glass plate 120 corresponding to the first end 11211, the second end 11212, the third end 11221, and the fourth end 11222, so that at least a portion of the first end 11211, at least a portion of the second end 11212, at least a portion of the third end 11221, and at least a portion of the fourth end 11222 are exposed from between the first quartz glass plate 110 and the second quartz glass plate 120 to form a microstrip line. The connection pins 131 of the four connectors 130 are connected to at least a portion of the first end 11211, at least a portion of the second end 11212, at least a portion of the third end 11221, and at least a portion of the fourth end 11222, respectively.

[0091] In a possible implementation, the first end 11211, the second end 11212, the third end 11221 and the fourth end 11222 are located at the edges of the first quartz glass plate 110 and the second quartz glass plate 120, and the window of the second quartz glass plate 120 can be set at the outer edge of the second quartz glass plate 120, so that the connector 130 can be connected to the first end 11211, the second end 11212, the third end 11221 and the fourth end 11222 from the side of the combination of the first quartz glass plate 110 and the second quartz glass plate 120.

[0092] In a possible implementation, the connection pins 131 of the four connectors 130 may be respectively connected to the first end 11211 , the second end 11212 , the third end 11221 , and the fourth end 11222 by welding.

[0093] In some embodiments, the connecting pins 131 of the four connectors 130 are respectively connected to the first microstrip line formed in the corresponding window by the first end 11211, the second microstrip line formed in the corresponding window by the second end 11212, the third microstrip line formed in the corresponding window by the third end 11221, and the fourth microstrip line formed in the corresponding window by the fourth end 11222 using a gold-plated tape process.

[0094] Specifically, the gold tape coating process may include: taking a section of gold tape 140 and using a welding process such as resistance welding to press-weld the first surface 111 of the gold tape 140 to a suitable position of the microstrip line; placing the connecting pin 131 of the connector 130 on the second surface 121 of the gold tape 140, and wrapping the gold tape 140 around the connecting pin 131 so that the gold tape 140 surrounds the connecting pin 131; using a welding process such as resistance welding to weld the gold tape 140 to the connecting pin 131.

[0095] The use of the gold-plated tape process can improve the high-frequency performance of the connection between the connecting pin 131 and the microstrip line, and reduce the loss and / or interference of the high-frequency signal during the transmission process.

[0096] In practical applications, the connector 130 uses a 1.85 mm connector 130, a connecting pin 1310.2 mm, and is connected to the microstrip ports exposed on the first quartz glass plate 110 and the second quartz glass plate 120 using a gold-plated strip process to optimize the standing wave ratio.

[0097] Figure 7 A directional coupler 10 is shown according to an embodiment of the present disclosure, such as Figure 7 The directional coupler 10 comprises the directional coupling component 100 described in the first aspect, a first metal shell 210 and a second metal shell 220, wherein:

[0098] The first metal shell 210 and the second metal shell 220 form a receiving cavity to receive the directional coupling assembly 100 .

[0099] Here, the directional coupling component 100 is as described in any of the above embodiments, and will not be described in detail herein.

[0100] In a possible implementation, the accommodation cavity formed by the first metal shell 210 and the second metal shell 220 may be an electromagnetic shielding accommodation cavity to reduce interference of external signals on the directional coupling circuit 112 .

[0101] In a possible implementation, the first metal shell 210 may form a cavity with an opening, the directional coupling assembly 100 is installed in the cavity through the opening, and the second metal shell 220 may serve as a cover of the cavity to close the opening.

[0102] In a possible implementation, the first metal shell 210 and the second metal shell 220 can be fixed by screws. The first metal shell 210 can form a cavity with an opening, and the side walls around the opening and the surface facing the same direction as the opening can be provided with screw holes. The second metal shell 220 is provided with a through hole 212 at a position corresponding to the screw hole. A screw can be used to pass through the through hole 212 and cooperate with the screw hole to lock the first metal shell 210 and the second metal shell 220.

[0103] In a possible implementation, the first metal shell 210 may be provided with a positioning column, and the second metal shell 220 may be provided with a positioning hole corresponding to the positioning column. The first metal shell 210 and the second metal shell 220 can be positioned based on the configuration of the positioning column and the positioning hole.

[0104] The coupler circuit is designed on a quartz glass plate, which is more flexible than the mechanical structure circuit design. The thickness of the quartz glass plate is flexible and can be freely controlled and adjusted according to the design, reducing the difficulty of circuit design; and the thin thickness of the quartz glass plate reduces the size of the positioning coupler circuit.

[0105] In some embodiments, a limiting wall 211 is disposed in the accommodating cavity to limit the lateral displacement of the directional coupling assembly 100 .

[0106] The side wall of the accommodating cavity can be set based on the side shape of the directional coupling component 100, so that the side wall of the accommodating cavity forms a limiting wall 211 for limiting the directional coupling component 100. In this way, the lateral movement of the directional coupling component 100 can be reduced.

[0107] In some embodiments, the directional coupling line 112 includes: a first transmission line 1121 for transmitting a signal and a second transmission line 1122 for coupling the signal; wherein the first transmission line 1121 includes a first end 11211 for inputting the signal, a second end 11212 for outputting the signal, and a transmission section 11213 between the first end 11211 and the second end 11212; the second transmission line 1122 includes a coupling section 11223 for coupling the signal from the transmission section 11213 to obtain a coupled signal, a third end 11221 and a fourth end 11222 respectively connected to both ends of the coupling section 11223, wherein the third end 11221 is used to output the coupled signal;

[0108] The side wall of the accommodating cavity is provided with through holes 212 at corresponding positions of the first end 11211, the second end 11212, the third end 11221 and the fourth end 11222 respectively;

[0109] The four connectors 130 penetrate the corresponding through holes 212 and are respectively connected to the first end 11211 , the second end 11212 , the third end 11221 and the fourth end 11222 .

[0110] like Figure 6 As shown, the first metal shell 210 can form an open cavity with side walls, and the side walls are provided with through holes 212 for the connector 130 to pass through. The four connectors 130 can be connected to the first end 11211, the second end 11212, the third end 11221 and the fourth end 11222 respectively through the through holes 212.

[0111] The through hole 212 can be set based on the position of the directional coupling component 100, so that after the connector 130 passes through the through hole 212, the position of the connecting foot 131 can match the first end 11211, the second end 11212, the third end 11221 and the fourth end 11222.

[0112] In some embodiments, the connector 130 and the corresponding through hole 212 are fixed by threaded engagement.

[0113] like Figure 6 As shown, the first metal shell 210 can form an open cavity with a side wall, and the side wall is provided with a through hole 212 for the connector 130 to pass through. The inner wall of the through hole 212 can be provided with a thread. The connector 130 can be cylindrical. The outer wall of the connector 130 can be provided with a thread that matches the inner wall thread of the through hole 212. In this way, the four connectors 130 can be fixed by matching with the through hole 212 thread.

[0114] In some embodiments, the first metal surface of the first metal shell 210 is bonded to the first metal layer 114 of the third surface 113, or the second metal surface of the second metal shell 220 is bonded to the second metal layer 123 of the fourth surface 122; the first metal surface faces the third surface 113, and the second metal surface faces the fourth surface 122.

[0115] Exemplarily, the first metal shell 210 may form a cavity with an opening, and the bottom surface of the cavity is the first metal surface. The directional coupling component 100 is installed in the cavity through the opening so that the first metal surface is in contact with the first metal layer 114 of the third surface 113 .

[0116] In a possible implementation, the second metal shell 220 covers the cavity, and the second metal surface of the second metal shell 220 can be in contact with the second metal layer 123 of the fourth surface 122 .

[0117] In a possible implementation, the second metal surface may be spaced apart from the second metal of the fourth surface 122 by a predetermined distance.

[0118] In a possible implementation, the first metal surface and the first metal layer 114 of the third surface 113 may be bonded with conductive adhesive, etc. The second metal surface and the second metal layer 123 of the fourth surface 122 may be bonded with conductive adhesive, etc.

[0119] In practical applications, the first metal shell 210 and the second metal shell 220 can be grounded, the first metal surface is bonded to the third surface 113, and the second metal surface is bonded to the fourth surface 122. The first metal layer 114 and the second metal layer 123 can be grounded to improve the shielding effect and thus improve the coupling performance.

[0120] Here, a specific example is provided in combination with the above-mentioned embodiment.

[0121] 1. If Figure 7 As shown, the directional coupler 10 comprises:

[0122] Two quartz glass (silicon dioxide) films (first quartz glass plate 110 and second quartz glass plate 120) of the same size and 0.127 mm thick, one of which (first quartz glass plate 110) is printed with a coupler circuit, and the two films are bonded together so that the coupler is located in the middle of the substrate to form a stripline. Microstrip ports are reserved at the edges of the four ports, not covering the quartz glass substrate, for connection with the connector 130;

[0123] The coupler circuit adopts a gradient design, with a small spacing and thin line width at the input end (1) and a large spacing and thick line width at the output end (2). This design is conducive to expanding bandwidth and optimizing high-frequency performance.

[0124] 1.85mm connector 130: Connector 130 uses a 1.85mm connector 130 with an inner pin diameter of 0.2mm. It uses a gold-plated tape process to connect to the microstrip port on the film to optimize the standing wave ratio.

[0125] The metal cavity is divided into two parts, upper and lower, connected by screws; positioning holes are left on the cavity for fixing and installing the film. (First quartz glass plate 110 and second quartz glass plate 120)

[0126] PCB directional coupler 101 port is input port, 2 port is through port, 3 port is coupled port, 4 port is isolated port. Signal is input from port 1, 2 port is main output port, 3 port is coupled output, 4 port is isolated. The characteristics of directional coupler 10 are shown in the figure below: frequency: DC~67GHz; standing wave ratio: <1.52; coupling degree: 18±2dB; isolation: >30dB; directivity: >10dB.

[0127] in, Figure 8 In the figure, the red curve, green curve, blue curve and orange curve are the standing wave ratios measured at port 1, port 2, port 3 and port 4 at different frequencies respectively. Fig. 9 In the figure, the red curve, the green-red curve, the blue curve and the orange curve are respectively the measured signal loss between port 1 and port 2, the coupling between port 1 and port 3, the isolation between port 1 and port 4 and the directivity of the directional coupler 10 at different frequencies.

[0128] This embodiment adopts thin film circuit technology, which reduces the relative position adjustment process of the coupling line in the mechanical cavity and other structural schemes. With the help of the dielectric substrate, a stable stripline circuit structure can be formed, which does not need to be adjusted and optimized one by one, greatly saving manpower and time costs, and improving the yield rate; this embodiment relies on the high-precision manufacturing advantage of thin film circuits to improve the accuracy to 1 micron level. The high precision improves the high-frequency performance of the coupler, and the performance of the coupler product of this scheme is stable and consistent; the coupler circuit is designed on a flat thin film substrate, which is more flexible than the circuit design of the mechanical structure scheme. The thickness of the thin film substrate is flexible and can be arbitrarily controlled and adjusted according to the design, reducing the difficulty of circuit design; and the thin thickness of the film sheet reduces the size of the coupler circuit.

[0129] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0130] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A directional coupling component, characterized in that: The directional coupling assembly includes a first quartz glass plate and a second quartz glass plate; A directional coupling circuit is disposed on the first surface of the first quartz glass plate, and the first surface and the second surface of the second quartz glass plate clamp the directional coupling circuit; A first metal layer is disposed on a third surface of the first quartz glass plate opposite to the first surface, and a second metal layer is disposed on a fourth surface of the second quartz glass plate opposite to the second surface, so that the directional coupling line forms a stripline.

2. The directional coupling assembly according to claim 1, characterized in that: The directional coupling line comprises: a first transmission line for transmitting a signal and a second transmission line for coupling the signal; wherein the first transmission line comprises: a first end for inputting the signal, a second end for outputting the signal, and a transmission section between the first end and the second end; the second transmission line comprises: a coupling section for coupling the signal from the transmission section to obtain a coupled signal, and a third end and a fourth end respectively connected to both ends of the coupling section, wherein the third end is used to output the coupled signal; The line width of the transmission segment gradually increases along the signal transmission direction, and / or the line width of the coupling segment gradually increases along the signal transmission direction, and / or the spacing distance between the transmission segment and the coupling segment gradually increases along the signal transmission direction.

3. The directional coupling assembly according to claim 2, characterized in that: The directional coupling assembly further includes four connectors connected to the first end, the second end, the third end and the fourth end respectively; The second quartz glass plate is provided with windows at positions corresponding to the first end, the second end, the third end and the fourth end respectively; The connecting pins of the four connectors are respectively connected to the first end, the second end, the third end and the fourth end through corresponding windows.

4. The directional coupling assembly according to claim 3, characterized in that: The connecting pins of the four connectors are respectively connected to a first microstrip line formed at the first end in the corresponding window, a second microstrip line formed at the second end in the corresponding window, a third microstrip line formed at the third end in the corresponding window, and a fourth microstrip line formed at the fourth end in the corresponding window by using a gold-plated tape process.

5. The directional coupling assembly according to claim 1, characterized in that: The directional coupling circuit is a thin film circuit.

6. The directional coupling assembly according to any one of claims 1 to 5, characterized in that: The first metal layer and the second metal layer include at least one of the following: Electroplated metal layer; Thin film circuit metal layer.

7. The directional coupling assembly according to any one of claims 1 to 5, characterized in that: A thickness difference between the thickness of the first quartz glass plate and the thickness of the second quartz glass plate is smaller than a predetermined range.

8. A directional coupler, characterized in that: The directional coupler comprises the directional coupling assembly according to any one of claims 1 to 7, a first metal shell and a second metal shell, wherein: The first metal shell and the second metal shell form a containing cavity to contain the directional coupling component.

9. The directional coupler according to claim 8, characterized in that A limiting wall is arranged in the accommodating cavity to limit the lateral displacement of the directional coupling component.

10. The directional coupler according to claim 8, characterized in that The directional coupling line comprises: a first transmission line for transmitting a signal and a second transmission line for coupling the signal; wherein the first transmission line comprises a first end for inputting the signal, a second end for outputting the signal, and a transmission section between the first end and the second end; the second transmission line comprises a coupling section for coupling the signal from the transmission section to obtain a coupled signal, a third end and a fourth end respectively connected to two ends of the coupling section, wherein the third end is used to output the coupled signal; The side wall of the accommodating cavity is respectively provided with through holes at corresponding positions of the first end, the second end, the third end and the fourth end; The four connectors penetrate the corresponding through holes and are respectively connected to the first end, the second end, the third end and the fourth end.

11. The directional coupler according to claim 10, characterized in that The connector and the corresponding through hole are fixed by threaded fitting.

12. The directional coupler according to claim 8, characterized in that The first metal surface of the first metal shell is bonded to the first metal layer of the third surface, or the second metal surface of the second metal shell is bonded to the second metal layer of the fourth surface; The first metal surface faces the third surface, and the second metal surface faces the fourth surface.

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