Broadband channel link communication matching device

Abstract

The broadband channel link communication matching device comprises a shielding shell and a communication matching assembly, the communication matching assembly is arranged in the shielding shell, the communication matching assembly comprises a substrate, a conductor belt and a connector, the connector comprises an N-type connector female head, a high-frequency connector female head and a low-frequency connector female head, the conductor belt is arranged on the upper surface of the substrate, and the conductor belt is arranged on the lower surface of the substrate. The conductor strip comprises a first microstrip line, a second microstrip line and a third microstrip line, the first microstrip line comprises a longitudinal microstrip line and a transverse microstrip line which are perpendicular to each other, the second microstrip line is parallel to the longitudinal microstrip line, the first end of the second microstrip line is connected with the first end of the transverse microstrip line, and the second end of the second microstrip line is connected with the low-frequency connector female head; the third microstrip line comprises a square wave band and an output section, the first end of the square wave band is connected with the second end of the transverse microstrip line, the second end of the square wave band is connected with the first end of the output section, the second end of the output section is connected with the high-frequency connector female head, and the output section is parallel to the longitudinal microstrip line section.

Description

Technical Field

[0001] This utility model relates to the technical field of broadband channel connection transition devices, and more specifically, to a broadband channel link communication matching device. Background Technology

[0002] The electromagnetic compatibility test of the whole vehicle needs to be carried out in an anechoic chamber. The radiated signals emitted by the vehicle's electrical components are received by the vehicle's onboard antenna or passive antenna. The radio frequency cable is connected, passes through the waveguide hole of the anechoic chamber, and is connected to the signal receiver. The test parameters are read by the computer.

[0003] With the continuous expansion of vehicle communication services, vehicles are now equipped with antennas for communication services such as AM / FM, LTE, GNSS, and C-V2X. In electromagnetic compatibility (EMC) vehicle testing, it is necessary to protect the vehicle receiver from electromagnetic radiation generated by onboard electrical components. This involves receiving electromagnetic signals from the aforementioned antenna ports for measurement, with the entire test frequency band covering from several megahertz to several gigahertz.

[0004] Different antennas have different output ports, some with FAKRA connectors and others with kFARA connectors, while the RF cable used to connect the receiver has an N-type connector. The two cannot be directly connected, and accurate reception of electromagnetic signals is required over a wide frequency range. Utility Model Content

[0005] To address at least one aspect of the aforementioned problems, this utility model provides a broadband channel link communication matching device, comprising: a shielding housing, with a first opening and a second opening at both ends of the shielding housing; and a communication matching component disposed within the shielding housing, the communication matching component including a substrate, a conductor strip, and connectors, the connectors including an N-type female connector, a high-frequency female connector, and a low-frequency female connector, the N-type female connector being located at the first opening, the high-frequency female connector and the low-frequency female connector being fixedly disposed at the second opening, the conductor strip being disposed on the upper surface of the substrate, the conductor strip including a first microstrip line, a second microstrip line, and a third microstrip line, the first microstrip line including a longitudinal microstrip line and a transverse microstrip line arranged perpendicularly to each other. The first microstrip line consists of a vertical microstrip line whose top end is connected to the N-type connector female, a horizontal microstrip line whose midpoint is connected to the bottom end of the vertical microstrip line, and the horizontal microstrip line is parallel to the width direction of the substrate. The second microstrip line is parallel to the vertical microstrip line, with its first end connected to the first end of the horizontal microstrip line and its second end connected to the low-frequency connector female. The third microstrip line comprises multiple microstrip segments connected sequentially, forming a square wave segment and an output segment. The first end of the square wave segment is connected to the second end of the horizontal microstrip line, and the second end of the square wave segment is connected to the first end of the output segment. The second end of the output segment is connected to the high-frequency connector female, and the output segment is parallel to the vertical microstrip line segment.

[0006] Preferably, the connection between adjacent microstrip segments of the third microstrip line adopts a chamfered structure.

[0007] Preferably, the width of the longitudinal microstrip line is greater than the width of the transverse microstrip line.

[0008] Preferably, the width of the second microstrip line is equal to the width of the transverse microstrip line.

[0009] Preferably, the width of the microstrip line segment of the output section is equal to the width of the longitudinal microstrip line.

[0010] Preferably, the bandwidth of the microstrip line segment of the starting and ending square waves of the square wave band is equal to the width of the transverse microstrip line, and the bandwidth of the microstrip line segment of the middle square wave of the square wave band is greater than the width of the transverse microstrip line and less than the width of the longitudinal microstrip line.

[0011] Preferably, the output segment and the square wave segment are collinear.

[0012] The wideband channel link communication matching device of this utility model has the following advantages: In terms of device size, the internal microstrip line is designed as a square-wave curved shape, effectively reducing the connection distance between the antenna-end Fakra interface and the receiver-end N-type connector, ensuring signal transmission stability. In terms of applicable frequency, the device can cover multiple frequency bands, enabling reception of AM / FM, LTE, GNSS, and C-V2X antennas, effectively ensuring impedance matching between the antenna-end Fakra interface and the receiver-end N-type connector, minimizing signal reflection. This patented device features a shielded housing, effectively preventing external electromagnetic interference from coupling into the receiving cable, ensuring the accuracy of test results. Attached Figure Description

[0013] To better understand the above and other objects, features, advantages, and functions of this utility model, reference can be made to the embodiments shown in the accompanying drawings. The same reference numerals in the drawings refer to the same parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate preferred embodiments of this utility model and do not limit the scope of this utility model in any way; the parts in the drawings are not drawn to scale.

[0014] Figure 1 A schematic diagram of the substrate and conductor strip structure of a broadband channel link communication matching device according to an embodiment of the present invention is shown;

[0015] Figure 2 A schematic diagram of a broadband channel link communication matching device according to an embodiment of the present invention is shown;

[0016] Figure 3 A schematic diagram illustrating an application scenario of a broadband channel link communication matching device according to an embodiment of the present invention is shown.

[0017] Figure 4 A schematic diagram illustrating an application scenario of a broadband channel link communication matching device according to an embodiment of the present invention is shown.

[0018] Figure 5 A schematic diagram illustrating an application scenario of a broadband channel link communication matching device according to an embodiment of the present invention is shown.

[0019] Figure 6 A simulation diagram of a broadband channel link communication matching device according to an embodiment of the present invention is shown.

[0020] Figure label:

[0021] 1. Substrate; 21. First microstrip line; 211. Vertical microstrip line; 212. Horizontal microstrip line; 22. Second microstrip line; 23. Third microstrip line; 231. Square wave band; 232. Output segment; 3. Shielding housing. Detailed Implementation

[0022] The exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0023] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0024] To at least partially address one or more of the aforementioned problems and other potential issues, embodiments of this disclosure provide a broadband channel link communication matching device, comprising: a shielding housing with a first opening and a second opening at both ends; a communication matching component disposed within the shielding housing, the communication matching component including a substrate, a conductor strip, and connectors, the connectors including an N-type female connector, a high-frequency female connector, and a low-frequency female connector, the N-type female connector being located at the first opening, the high-frequency female connector and the low-frequency female connector being fixedly located at the second opening, the conductor strip being disposed on the upper surface of the substrate, the conductor strip including a first microstrip line, a second microstrip line, and a third microstrip line, the first microstrip line including... A longitudinal microstrip line and a transverse microstrip line are arranged perpendicularly to each other. The top of the longitudinal microstrip line is connected to an N-type female connector, and the midpoint of the transverse microstrip line is connected to the bottom of the longitudinal microstrip line. The transverse microstrip line is parallel to the width direction of the substrate. A second microstrip line is arranged parallel to the longitudinal microstrip line. The first end of the second microstrip line is connected to the first end of the transverse microstrip line, and the second end of the second microstrip line is connected to a low-frequency female connector. A third microstrip line includes multiple microstrip segments connected in sequence. The multiple microstrip segments are connected in sequence to form a square wave segment and an output segment. The first end of the square wave segment is connected to the second end of the transverse microstrip line, and the second end of the square wave segment is connected to the first end of the output segment. The second end of the output segment is connected to a high-frequency female connector, and the output segment is parallel to the longitudinal microstrip line segment.

[0025] Specifically, such as Figure 3 As shown, the shielding housing is a closed housing structure, and the segments of the shielding housing have a first opening and a second opening for the connector of the communication matching component to extend out.

[0026] like Figure 1 and Figure 2 As shown, the communication matching component includes a substrate, a conductor strip, and connectors. The connectors include an N-type female connector, a high-frequency female connector, and a low-frequency female connector. The N-type female connector is located at the first opening, while the high-frequency and low-frequency female connectors are fixedly positioned at the second opening. Figure 3 As shown, the communication matching component is housed inside the shielded housing, and extends out of the shielded housing through connectors at both ends.

[0027] like Figure 1 As shown, the substrate of the communication matching component adopts a rectangular structure. In some embodiments, the substrate adopts a square structure with a length of 80 mm and a width of 80 mm. A conductor strip is disposed on the substrate, and the first microstrip line of the conductor strip is connected to the second and third microstrip lines respectively. High-frequency and low-frequency microstrip lines use different microstrip wiring methods and different dielectric constants. The low-frequency section uses FR-4 material with a dielectric constant of 4.5 and a permeability of 1, while the high-frequency section uses a non-dispersive material with a dielectric constant of 2.99 and a permeability of 1. This achieves impedance matching in different frequency ranges, ensuring minimal signal transmission loss.

[0028] The longitudinal microstrip line of the first microstrip line is parallel to the length direction of the substrate, and the transverse microstrip line is parallel to the width direction of the substrate. The transverse microstrip line is perpendicular to the bottom end of the longitudinal microstrip line. The two ends of the transverse microstrip line are connected to the second microstrip line and the first microstrip line, respectively.

[0029] The second microstrip line is a conductor strip of equal width. The second microstrip line is set parallel to the longitudinal microstrip line, and the two ends of the second microstrip line are connected to the transverse microstrip line and the low-frequency connector female respectively.

[0030] The adjacent microstrip segments of the square wave band of the third microstrip line are perpendicular to each other at the connection point, and the width of each square wave in the square wave band is the same. In some embodiments, the width of each microstrip segment constituting the square wave band is set according to actual needs. The output segment is a conductor strip of equal width parallel to the length direction of the substrate. In some embodiments, the output segment is collinear with the axis of the square wave band.

[0031] In millimeter-wave integrated circuits, the requirements for the transition structure are low transmission loss and low return loss, i.e., good impedance matching. The commonly used coaxial cable connection is prone to bending, which affects the dielectric constant and causes signal attenuation. Therefore, by designing a microstrip line structure, the traditional coaxial cable connection method can be replaced to ensure that signal transmission is not affected.

[0032] By designing traditional linear microstrip lines into a structure that combines microstrip lines and coplanar striplines, the return loss of the transition structure is reduced while the spatial connection distance is decreased.

[0033] like Figure 5As shown, vehicle electromagnetic compatibility testing needs to be conducted in an anechoic chamber. The radiated signals emitted by the vehicle's electrical components are received via an onboard antenna or passive antenna. Radio frequency cables are then connected, passing through waveguide holes in the anechoic chamber to a signal receiver, and test parameters are read by a computer. Figure 4 As shown, different antenna output ports include Fakra connectors, kFakra connectors, etc., while the RF cable used to connect the receiver is an N-type connector. Figure 3 The communication matching component shown is housed within a shielded enclosure. It extends out of the enclosure via connectors at both ends, connecting the FM / LTE / GNSS antenna interface and the coaxial cable N-type connector in series. The shielded enclosure prevents signals from the cable from being received by the receiver through spatial radiation, thus avoiding interference with test results. FAKRA and N-type female connectors are provided at both ends of the transition structure, connecting to the antenna interface and the coaxial cable N-type connector, respectively.

[0034] In some embodiments, the connection between adjacent microstrip segments of the third microstrip line adopts a chamfered structure.

[0035] Specifically, such as Figure 1 As shown, chamfers are opened on the outer side of the connection between multiple adjacent microstrip segments of the third microstrip line. By opening chamfers, impedance continuity is optimized to reduce signal reflection and loss, thereby improving the high-frequency signal transmission performance.

[0036] In some embodiments, the width of the longitudinal microstrip line is greater than the width of the transverse microstrip line.

[0037] Specifically, such as Figure 1 As shown, the longitudinal microstrip line is a conductor strip of equal width 6mm, and the transverse microstrip line is a conductor strip of equal width 4mm. In other embodiments, the widths of the longitudinal and transverse microstrip lines can be set according to actual needs.

[0038] In some embodiments, the width of the second microstrip line is equal to the width of the transverse microstrip line.

[0039] Specifically, such as Figure 1 As shown, the second microstrip line is a conductor strip of the same width as the transverse microstrip line, with a width of 4 mm. The length of the second microstrip line is equal to the sum of the width of the transverse microstrip line and the length of the longitudinal microstrip line, which is equal to the width of the substrate.

[0040] In some embodiments, the width of the microstrip line in the output segment is equal to the width of the longitudinal microstrip line.

[0041] Specifically, such as Figure 1 As shown, the width of the microstrip line corresponding to the output segment is 6mm. In some embodiments, the length of the microstrip line of the output segment is the same as the length of the longitudinal microstrip line.

[0042] In some embodiments, the bandwidth of the microstrip line segment of the starting and ending square waves of the square wave band is equal to the width of the transverse microstrip line, and the bandwidth of the microstrip line segment of the middle square wave of the square wave band is greater than the width of the transverse microstrip line and less than the width of the longitudinal microstrip line.

[0043] Specifically, such as Figure 1 As shown, the starting and ending square waves of the square wave band use a 4mm wide conductor strip, while the middle square wave of the square wave band uses a 5mm wide conductor strip. In another embodiment, the number of square waves in the square wave band and the width of the corresponding microstrip line segment can be set according to actual needs.

[0044] like Figure 6 As shown, the horizontal axis represents frequency, and the vertical axis represents return loss. The s11 value is less than -8dB in the 0.5GHz-5GHz range, which meets the requirements for whole-vehicle radiation testing.

[0045] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand this document.

Claims

1. A broadband channel link communication matching device, characterized in that, include: A shielding housing, wherein a first opening and a second opening are respectively provided at both ends of the shielding housing; A communication matching component is disposed within the shielding housing. The communication matching component includes a substrate, a conductor strip, and connectors. The connectors include an N-type female connector, a high-frequency female connector, and a low-frequency female connector. The N-type female connector is located at the first opening. The high-frequency and low-frequency female connectors are fixedly disposed at the second opening. The conductor strip is disposed on the upper surface of the substrate and includes a first microstrip line, a second microstrip line, and a third microstrip line. The first microstrip line includes a longitudinal microstrip line and a transverse microstrip line arranged perpendicularly to each other. The top end of the longitudinal microstrip line is connected to the N-type female connector, and the midpoint of the transverse microstrip line is connected to the N-type female connector. The bottom end of the vertical microstrip line is connected, the horizontal microstrip line is parallel to the width direction of the substrate, the second microstrip line is parallel to the vertical microstrip line, the first end of the second microstrip line is connected to the first end of the horizontal microstrip line, the second end of the second microstrip line is connected to the low-frequency connector, the third microstrip line includes a plurality of microstrip segments connected in sequence, the plurality of microstrip segments are connected in sequence to form a square wave segment and an output segment, the first end of the square wave segment is connected to the second end of the horizontal microstrip line, the second end of the square wave segment is connected to the first end of the output segment, the second end of the output segment is connected to the high-frequency connector, and the output segment is parallel to the vertical microstrip line segment.

2. The apparatus according to claim 1, characterized in that, The connection between adjacent microstrip segments of the third microstrip line adopts a chamfered structure.

3. The apparatus according to claim 2, characterized in that, The width of the longitudinal microstrip line is greater than the width of the transverse microstrip line.

4. The apparatus according to claim 3, characterized in that, The width of the second microstrip line is equal to the width of the transverse microstrip line.

5. The apparatus according to claim 4, characterized in that, The width of the microstrip line segment in the output section is equal to the width of the longitudinal microstrip line.

6. The apparatus according to claim 5, characterized in that, The width of the microstrip line segment of the starting and ending square waves of the square wave band is equal to the width of the transverse microstrip line, and the width of the microstrip line segment of the middle square wave of the square wave band is greater than the width of the transverse microstrip line and less than the width of the longitudinal microstrip line.

7. The apparatus according to claim 6, characterized in that, The output segment and the square wave segment are collinear.

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