Stripline RF devices

Abstract

The present disclosure relates to a stripline radio frequency device, comprising: an annular side wall, a bottom wall, and a cavity formed by the annular side wall and the bottom wall, wherein two filters are provided in the cavity, and the two filters respectively comprise metal conduction strips, the two metal conduction strips are connected via a common conduction strip, and the two metal conduction strips are respectively suspended and mounted on the bottom wall. In the technical solution provided by the embodiment of the present disclosure, a cavity is provided by the bottom wall and the annular side wall, and two filters are provided in the cavity, and respectively comprise metal conduction strips, the two metal conduction strips are respectively suspended and mounted on the bottom wall, and are connected via a common conduction strip, thereby simplifying the device structure and reducing the difficulty of assembly.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a stripline radio frequency device. Background Art

[0002] In mobile communications technology, microwave filters, comprising RF components, have become an essential component. Metal cavity filters, in particular, are the preferred type of transmit filter for mobile communication base stations due to their excellent electromagnetic shielding, compact structure, low insertion loss within the passband, small size, and high power handling. With the continuous development of wireless communications, the promotion of green energy, and the growing demand for cost reduction, miniaturization, lightweighting, and low cost have become the future development trends for metal cavity filters.

[0003] Typically, microwave cavity RF devices, such as combiners, are constructed from multiple filters. When there are multiple passbands, assembly becomes more difficult and the structure becomes complex. Summary of the Invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a stripline radio frequency device.

[0005] The present disclosure provides a stripline radio frequency device, comprising: an annular side wall, a bottom wall, and a cavity formed by the annular side wall and the bottom wall. Two filters are provided in the cavity, and the two filters respectively include a metal conduction strip, the two metal conduction strips are connected via a common conduction strip, and the two metal conduction strips are respectively suspended and mounted on the bottom wall.

[0006] Optionally, a positioning boss is provided on the bottom wall, and the metal guide belt is installed on the bottom wall via the positioning boss.

[0007] Optionally, the positioning boss includes a first boss and a second boss;

[0008] The first boss is used to control the installation height of the metal guide belt, and the second boss is used to limit the installation position of the metal guide belt relative to the annular side wall.

[0009] Optionally, the filter further includes a first dielectric sheet, and the first dielectric sheet is arranged between the metal conductive strip and the first boss.

[0010] Optionally, the second boss is a positioning post, and the metal guide strip and the first dielectric sheet are respectively provided with positioning holes that cooperate with the positioning post.

[0011] Optionally, the filter further includes a second dielectric sheet, and the metal conductive strip is provided between the first dielectric sheet and the second dielectric sheet.

[0012] Optionally, the bottom wall is provided with a groove at a position corresponding to the common conductive strip.

[0013] Optionally, the two metal conductive strips are respectively provided with input and output ends at one end away from the common conductive strip, and one end of the common conductive strip is provided with a common end;

[0014] The two input and output terminals and the common terminal are spaced apart from each other and are arranged on the same side of the annular side wall or selectively on two opposite sides of the annular side wall.

[0015] Optionally, the stripline RF device further comprises three RF connectors provided on the annular side wall, and the two input and output terminals and the one common terminal are respectively connected to the three RF connectors in a one-to-one correspondence.

[0016] Optionally, the metal conductive strip includes a plurality of resonance plates and connecting plates arranged at intervals, and adjacent resonance plates are connected via the connecting plates.

[0017] Optionally, two connecting plates are provided between adjacent resonant plates, and the two connecting plates are spaced apart and respectively connected to the resonant plates.

[0018] Optionally, the resonant sheet includes a first sheet-like structure and a second sheet-like structure, and the first sheet-like structure and the second sheet-like structure are connected to each other to form a T-shaped structure.

[0019] Optionally, in some of the resonant sheets, the first sheet-like structure and the second sheet-like structure are arranged from top to bottom, and in some of the resonant sheets, the first sheet-like structure and the second sheet-like structure are arranged from bottom to top.

[0020] Optionally, a dielectric sheet is provided at a position corresponding to the first sheet-like structure.

[0021] Optionally, the metal conductive strip includes three resonant plates that are sequentially spaced apart; and the filter further includes a capacitive coupling structure, and the capacitive coupling structure is used to achieve capacitive coupling between the first resonant plate and the third resonant plate.

[0022] Optionally, the capacitive coupling structure includes a coupling sheet and an insulating support medium;

[0023] The coupling plate is stacked and fixed to the first sheet-like structure; the insulating support medium is located between the first sheet-like structure and the coupling plate.

[0024] Optionally, the coupling plate includes two first coupling plates and a second coupling plate connected between the two first coupling plates;

[0025] The first coupling plate is stacked with the first sheet-like structure, and the second coupling plate is stacked with the second sheet-like structure.

[0026] Optionally, the two metal conductive strips are integrally formed with the common conductive strip.

[0027] The technical solution provided by the present disclosure has the following advantages compared with the existing technology:

[0028] In the stripline RF device provided by the present disclosure, a cavity is provided, which is surrounded by a bottom wall and an annular side wall. Two filters are arranged in the cavity and each includes a metal conduction strip. The two metal conduction strips are respectively suspended and mounted on the bottom wall and connected via a common conduction strip, which simplifies the device structure and reduces the difficulty of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0030] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 This is a schematic diagram of the overall structure of a stripline radio frequency device according to an embodiment of the present disclosure;

[0032] Figure 2 for Figure 1 A schematic diagram of the exploded structure of a stripline RF device is shown;

[0033] Figure 3 for Figure 1 A top view of a stripline RF device is shown;

[0034] Figure 4 for Figure 1 A schematic structural diagram of a conduction strip of a stripline RF device is shown;

[0035] Figure 5 for Figure 1 The figure shows a schematic diagram of the S-parameter curve of a stripline RF device.

[0036] The reference numerals and their meanings are as follows:

[0037] 1. Cavity; 2. Conductive strip; 3. Dielectric sheet; 4. Insulating support medium; 5. RF connector; 6. Metal wire; 11. Through hole; 12. First boss; 13. Second boss; 14. Groove; 15. First metal layer; 29. ​​Second metal layer; 21. First filter; 22. Second filter; 23. Common conductive strip; 24. First sheet structure; 25. Second sheet structure; 26. Third sheet structure; 27. Connecting sheet; 28. Capacitive coupling structure; 241. First fixing hole; 251. Second fixing hole; 281. First coupling sheet; 282. Second coupling sheet; 31. Third fixing hole. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0040] The stripline RF device provided in the embodiments of the present disclosure may be a resonator, filter, combiner, duplexer or other structural components in the form of a stripline structure. The stripline RF device will be described below using a combiner as an example.

[0041] Among them, the use of a stripline structure is conducive to the miniaturization of components; however, the resonator form, common port, installation method, and miniaturization method of the stripline combiner are all difficult points in product design.

[0042] To address at least some or all of the above-mentioned issues, embodiments of the present disclosure provide a stripline RF device comprising a sealed space corresponding to a cavity, a conductive strip, a dielectric sheet, and an RF connector. The device is compact, easy to process, manufacture, and assemble, and features consistent performance, high practicality, and ease of mass production. Furthermore, the size and position of the sheet structure and connector within the conductive strip can be adjusted to achieve flexible adjustments to frequency and coupling strength.

[0043] Specifically, the stripline RF device provided by the embodiment of the present disclosure is formed by a cavity surrounded by an annular side wall and a bottom wall. A conduction strip for forming a filter, such as a metal conduction strip, is provided in the enclosed space corresponding to the cavity. A dielectric sheet is provided on the periphery of the conduction strip. A boss and a groove are provided on the inner bottom wall of the enclosed space. The boss is used to fix the conduction strip and the dielectric sheet, and the groove is used to increase the port coupling bandwidth. The conduction strip is composed of a plurality of sheet structures of a certain shape, a connecting sheet, and a capacitive coupling structure. The certain shape may include square, rectangular, strip, etc. The sheet structures are connected together by connecting sheets. The dielectric sheet is located on the periphery of the conduction strip and on at least one side of the conduction strip. Through holes are provided on the side walls of the cavity constituting the enclosed space. The through holes are used to place RF connectors. A metal layer is provided inside the enclosed space and on the surface of the conduction strip. Thus, the cavity, the conduction strip, the dielectric sheet, and the RF connector together constitute the stripline RF device. A dielectric sheet with a certain dielectric constant is provided on the periphery of the conduction band, which can reduce the overall size of the RF device; and by adjusting the size of the sheet structure and the size and position of the connecting sheet, the frequency and coupling amount can be flexibly adjusted, thereby specifically meeting the needs of mobile communications in different scenarios.

[0044] In the following text, Figure 1-5 The stripline RF device provided in the embodiment of the present disclosure is exemplified.

[0045] like Figures 1-4 As shown, the stripline RF device includes: a cavity 1 and a conduction strip 2, the cavity 1 is formed by an annular side wall and a bottom wall; the conduction strip 2 can be a metal conduction strip, which can be optionally set to be layered and arranged in the cavity 1; the conduction strip 2 can form two filters (or resonators), the two filters respectively include a metal conduction strip, and the two metal conduction strips are connected via a common conduction strip 23; and the two metal conduction strips are respectively suspended and mounted on the bottom wall.

[0046] The cavity 1 forms a closed space and accommodates the conductive tape 2 .

[0047] The conductive strip 2 is a sheet-like structure as a whole, and at least two filters are arranged in the same sheet-like structure of the conductive strip and connected by a common conductive strip 23. By way of example, the figure shows a first filter 21 and a second filter 22, where the first filter can also be referred to as a first-path filter and the second filter can also be referred to as a second-path filter. The first filter 21 and the second filter 22 are connected by the common conductive strip 23, thereby achieving a combined path, simplifying the structure, reducing assembly difficulty, and facilitating manufacturing.

[0048] Exemplarily, taking the radio frequency device as a combiner as an example, the common conduction band 23 is located between the first filter 21 and the second filter 22 and is used for combining the first filter 21 and the second filter 22 .

[0049] In other embodiments, the filter included in the conduction band 2 may also be 3-way, 4-way or more, which is not limited here.

[0050] In some embodiments, the cavity 1 includes an annular side wall and a bottom wall fixedly connected to one end of the side wall.

[0051] The side wall is a closed ring, exemplarily a rectangle in the figure. The bottom wall is used to cover one end of the side wall. The cavity 1 may also include a top wall, which can cover the other end of the side wall, so that the side wall, bottom wall and top wall form a closed space.

[0052] In some embodiments, a positioning boss is provided on the bottom wall, and the metal guide belt is installed on the bottom wall via the positioning boss.

[0053] Exemplarily, a positioning boss is provided on the side of the bottom wall facing the guide strip 2 and capable of fixing the metal guide strip, so as to simplify the fixing structure and further simplify the overall structure of the radio frequency device.

[0054] In some embodiments, the positioning boss includes a first boss 12 and a second boss 13; optionally, the first boss 12 is arranged within a preset distance range from the corresponding side wall, and the distance between the second boss 13 and the corresponding side wall is greater than the preset distance; wherein, the first boss 12 is used to control the installation height of the guide belt 2, and the second boss 13 is used to limit the installation position of the guide belt 2 relative to the annular side wall.

[0055] A first boss 12 and a second boss 13 are provided inside the enclosed space to fix the conductive strip 2 and define its installation position, thereby making the stripline RF device easy to assemble.

[0056] Specifically, the first boss 12 can be located at the bottom of the cavity 1 near the side wall. The first boss 12 can be in contact with the side wall or not. The height of the first boss 12 can be flexibly set based on the position requirements of the guide strip 2. The second boss 13 can be located in the middle of the bottom wall of the cavity 1, that is, not close to the side wall. When there are multiple second bosses 13, the heights of all second bosses 13 can be the same or different.

[0057] The conductive strip 2 is located in the middle of the enclosed space and is in close contact with the first boss 12 . The two are fixed together by screws to achieve electrical connection between the two for grounding.

[0058] It can be understood that whether the positioning boss is close to the side wall, and the division of the middle position and edge position of the enclosed space are all based on a preset distance; the specific value of the preset distance can be set based on the needs of the RF device and is not limited here.

[0059] In some embodiments, reference Figure 1The bottom wall is provided with a groove at a position corresponding to the common conductive tape 23; specifically, a groove 14 is provided at a position directly opposite the common conductive tape 23; the groove 14 is located within the vertical projection of the common conductive tape 23 on the bottom wall and is recessed in a direction away from the conductive tape 2.

[0060] Taking the orientation shown in the figure as an example, groove 14 is located at a position where the common conductive strip 23 is perpendicular to the bottom of the enclosed space, that is, directly below the common conductive strip 23, and has a certain width and depth. The common conductive strip 23 corresponds to the common port line. This arrangement, that is, providing groove 14 of a certain width and depth at a position where the common port line is perpendicular to the bottom of the enclosed space, can increase the coupling bandwidth of the common port. At the same time, because the thickness of the bottom wall is reduced at the location of groove 14, the overall weight of the RF device can also be reduced.

[0061] In some embodiments, the stripline RF device further includes an RF connector 5 ; a through hole 11 is provided on the side wall; and the RF connector 5 is connected to the conductive strip 2 through the through hole 11 .

[0062] In some embodiments, the two metal conductive strips are respectively provided with input and output ends at one end away from the common conductive strip 23, and a common end is provided at one end of the common conductive strip 23; the two input and output ends and one common end are spaced apart, and the three are provided on the same side of the annular side wall or selectively on opposite sides of the annular side wall.

[0063] In some embodiments, the stripline RF device further includes three RF connectors 5 provided on the annular side wall, and the two input and output terminals and one common terminal are connected to the three RF connectors 5 in a one-to-one correspondence.

[0064] Among them, the cavity 1 can form a resonant cavity corresponding to the filter, and the RF connector 5 is fixed on the resonant cavity of the filter, instead of using a common resonant cavity to fix the RF connector. This reduces the structure in the RF device and can further reduce the overall size of the RF device, making it easier to achieve miniaturization and lightweight design.

[0065] For example, taking the square side wall shown in the figure as an example, the position of the through hole 11 can be set on any side wall of the cavity 1 based on space or quantity requirements, and is not limited here.

[0066] In some embodiments, the stripline RF device further includes a metal wire 6 ; the metal wire 6 connects the RF connector 5 and the conductive strip 2 .

[0067] In the embodiment of the present disclosure, the RF connector 5 is electrically connected to the conductive strip 2 via the metal wire 6 through the through hole 11 on the side wall of the cavity 1, thereby ensuring the input and output of signals.

[0068] In some embodiments, the stripline RF device further includes a dielectric sheet 3 ; the dielectric sheet 3 is disposed on at least one surface of the conductive strip 2 ; and the dielectric constant of the dielectric sheet 3 is greater than 1.

[0069] In some embodiments, the filter may further include a first dielectric sheet; the first dielectric sheet is disposed between the metal conduction strip and the first boss, and can increase the dielectric constant, thereby reducing the frequency of the filter and further reducing the overall size of the RF device.

[0070] In some embodiments, the second boss is a positioning post, and the metal conductive tape and the first dielectric sheet are respectively provided with positioning holes that cooperate with the positioning posts for installation, so that the metal conductive tape and the first dielectric sheet can be easily installed using the second boss, thereby simplifying the overall structure of the RF device.

[0071] In some embodiments, the filter further includes a second dielectric sheet, and the metal conductive strip is disposed between the first dielectric sheet and the second dielectric sheet.

[0072] In the disclosed embodiment, by disposing a dielectric sheet 3 having a dielectric constant greater than 1 around the periphery of the conductive strip 2, the dielectric constant of the dielectric medium surrounding the conductive strip 2 is increased relative to that of air. This, for devices at the same frequency, facilitates reducing the overall size of the RF device, achieving a miniaturized and lightweight design. The dielectric constant of the dielectric sheet 3 is greater than that of air, meaning that the dielectric sheet 3 can be made of an insulating dielectric material having a dielectric constant greater than 1, further reducing the frequency of the conductive strip 2 and, in turn, reducing the overall size of the RF device.

[0073] The dielectric sheet 3 can be fixed in the cavity 1 via the second boss 13 .

[0074] For example, when dielectric sheets 3 are present on both the upper and lower surfaces of the guide belt 2, the second boss 13 passes through a hole (hereinafter referred to as the third fixing hole 31) provided in the dielectric sheet 3 on the lower surface and a hole (hereinafter referred to as the first fixing hole 241) provided in the first sheet-like structure 24, thereby securing the dielectric sheet 3 on the upper surface. When dielectric sheet 3 is present only on the lower surface of the guide belt 2, the second boss 13 passes through only the hole in the dielectric sheet 3 and secures the dielectric sheet 3 via the guide belt 2.

[0075] In some embodiments, the metal conductive strip includes a plurality of resonant plates and connecting plates that are spaced apart from each other. Adjacent resonant plates are connected by connecting plates, which can enhance coupling.

[0076] In some embodiments, two connecting plates are provided between adjacent resonant plates. The two connecting plates are spaced apart and respectively connected to the resonant plates, which is beneficial to further enhance coupling.

[0077] In some embodiments, the resonant sheet includes a first sheet structure 24 and a second sheet structure 25 , and the first sheet structure 24 and the second sheet structure 25 are connected to each other to form a T-shaped structure.

[0078] In some embodiments, the filter includes a first sheet structure 24, a second sheet structure 25 and a connecting sheet 27; the second sheet structure 25 extends along a first direction X, the connecting sheet 27 extends along a second direction Y, and the first direction X intersects with the second direction Y; the first sheet structure 24 is connected to one end of the second sheet structure 25, and the connecting sheet 27 connects the first sheet structure 24 and / or the second sheet structure 25 adjacent along the second direction Y.

[0079] In the embodiment of the present disclosure, the cross-placement of the connecting sheet 27 , the first sheet structure 24 , and the second sheet structure 25 can further save space and reduce the overall size of the radio frequency device.

[0080] Furthermore, with the dimensions of first sheet structure 24 unchanged, the wider and longer second sheet structure 25 is, the lower the frequency of the RF device is. The closer the connecting sheet 27 between the two filters is to the first sheet structure 24, the greater the coupling between the two filters. Therefore, by adjusting the width or length of second sheet structure 24 and the position of connecting sheet 27, the frequency and coupling can be flexibly adjusted to meet the needs of different frequency bands, making it suitable for application in modern mobile communication systems.

[0081] Illustratively, the frequency band or frequency band range may be 800M, 900M, 1800M, 2100M, 700M~3.5G, etc., which is not limited here.

[0082] In some embodiments, at least a portion of the first sheet structure 24 is provided with a first fixing hole 241, at least a portion of the second sheet structure 25 is provided with a second fixing hole 251, and the dielectric sheet 3 is provided with a third fixing hole 31; the second boss 13 fixes the guide belt 2 through the first fixing hole 241, and / or fixes the dielectric sheet 3 through the third fixing hole 31; the first boss 12 fixes the guide belt 2 through the second fixing hole 251.

[0083] In the disclosed embodiment, the guide strip 1 and dielectric sheet 3 can be secured within the cavity 1 using screws based on the aforementioned fixing holes. Specifically, the dielectric sheet 3 is secured within the cavity 1 via the second boss 13 and the third fixing hole 31, ensuring that the dielectric sheet 3 remains fixed relative to the cavity 1. Similarly, the guide strip 2 is secured within the cavity 1 via the first fixing hole 241, the second fixing hole 251, the first boss 12, and the second boss 13, ensuring that the guide strip 2 remains fixed relative to the cavity 1.

[0084] It should be noted that the number of the third fixing holes 31 provided on the dielectric sheet 3 can be one or more; the third fixing holes 31 can be through holes or blind holes, which are not limited here.

[0085] At the same time, the boss can be oval, square or other shapes, the sheet structure can be oval, circular or other shapes, and the fixing holes on the sheet structure and the dielectric sheet can be oval, square or other shapes. There is no limitation here, as long as the boss can fix the dielectric sheet and the guide belt.

[0086] In some embodiments, the filter further includes a third sheet-like structure 26 , which extends along the second direction Y and connects two adjacent second sheet-like structures 25 at ends.

[0087] In the disclosed embodiment, the conductive strip 2 is composed of a first filter 21, a second filter 22, and a common conductive strip 23. The first filter 21 is composed of a plurality of first sheet structures 24, a plurality of second sheet structures 25, a plurality of third sheet structures 26, and a plurality of connecting sheets 27. The second filter 22 is composed of a plurality of first sheet structures 24, a plurality of second sheet structures 25, a plurality of third sheet structures 26, and a plurality of connecting sheets 27. In combination with the above, optionally, the width of the third sheet structure 26 can be zero, that is, the third sheet structure 26 can also be absent.

[0088] In some embodiments, the first sheet structure 24 and the second sheet structure 25 are arranged from top to bottom in some resonant sheets, and the first sheet structure 24 and the second sheet structure 25 are arranged from bottom to top in some resonant sheets.

[0089] The first sheet structure 24, the second sheet structure 25, and the third sheet structure 26 are directly connected together. The connection directions of the first sheet structure 24 and the second sheet structure 25 can be the same or opposite. When the connection directions of the first sheet structure 24 and the second sheet structure 25 are the same, the connection piece 27 can be located between the two first sheet structures 24 or between the two second sheet structures 25. When the connection directions of the first sheet structure 24 and the second sheet structure 25 are opposite, the connection piece 27 is located between the first sheet structure 24 and the second sheet structure 25.

[0090] In the disclosed embodiment, while the dimensions of first sheet structure 24 and third sheet structure 26 remain unchanged, the wider and longer the second sheet structure 25, the lower the frequency of the filter. The closer the connecting piece 27 between the two sheet structures is to the first sheet structure 24, the greater the coupling between the two filters. Therefore, by adjusting the width or length of the sheet structures, as well as the position of the connecting piece, the frequency and coupling can be flexibly adjusted to meet the needs of different RF devices.

[0091] In some embodiments, a dielectric sheet 3 is provided at a position corresponding to the first sheet structure 24 .

[0092] Specifically, a vertical projection of the first sheet-like structure 24 on the dielectric sheet 3 may be located inside the dielectric sheet 3 .

[0093] In the embodiment of the present disclosure, the dielectric sheet 3 is arranged on the periphery of the first sheet structure 24 to achieve equivalent surrounding of the first sheet structure 24, so that the equivalent dielectric constant of the periphery of the conduction strip 2 is larger, thereby reducing the frequency and facilitating miniaturization and lightweight design.

[0094] It should be noted that the dielectric sheet may be in an elliptical, circular or other shape, as long as the perimeter of the dielectric sheet is greater than or equal to the perimeter of the first sheet structure.

[0095] In some embodiments, the metal conductive strip includes three resonant plates spaced apart from each other in sequence; the filter further includes a capacitive coupling structure 28; the capacitive coupling structure 28 is used to achieve capacitive coupling between the first resonant plate and the third resonant plate.

[0096] In some embodiments, in the stripline RF device, the capacitive coupling structure 28 includes a coupling plate and an insulating support medium 4 ; the coupling plate is stacked and fixed to the first sheet structure 24 ; and the insulating support medium 4 is located between the first sheet structure 24 and the coupling plate.

[0097] Exemplarily, the second filter 22 further includes a capacitive coupling structure 28 . The capacitive coupling structure 28 includes a coupling plate. The coupling plate is not in contact with the first sheet structure 24 , and the two are fixed together via an insulating support medium 4 .

[0098] Insulating support medium 4 is made of an insulating material and is used to secure first sheet structure 24 and coupling sheet to prevent direct contact between them. Furthermore, as long as direct contact between first sheet structure 24 and coupling sheet is ensured, insulating support medium 4 can be of any shape or structure, and is not limited herein.

[0099] In some embodiments, the capacitive coupling structure 28 includes two first coupling plates 281 and a second coupling plate 282 connected between the two first coupling plates 281 ; the first coupling plates 281 are stacked with the first sheet structure 24 , and the second coupling plates 282 are stacked with the second sheet structure 25 .

[0100] In the embodiment of the present disclosure, the first sheet structure 24 and the first coupling sheet 281 are separated by an insulating support medium 4 , and a gap exists between the second sheet structure 25 and the second coupling sheet to form a capacitive coupling structure 28 .

[0101] In the RF device provided by the disclosed embodiment, the conductive strip 2 is composed of multiple shaped sheet structures, connecting strips, and capacitive coupling structures, with the sheet structures connected together by the connecting strips. Therefore, the stripline combiner is easy to process and has good performance consistency, facilitating mass production.

[0102] In some embodiments, the two metal conductive strips and the common conductive strip are integrally formed to simplify the structure and the manufacturing process.

[0103] In some embodiments, the stripline RF device further includes a metal layer; the metal layer covers the inner surface of the cavity 1 and the surface of the conductive strip 2 .

[0104] In the embodiment of the present disclosure, a metal layer is provided inside the enclosed space corresponding to the cavity 1 and on the surface of the conductive tape 2 .

[0105] For example, the metal layer may include a first metal layer 15 and a second metal layer 29. The first metal layer 15 is located on the inner surface of the cavity 1 and covers all surfaces of the through hole 11, the first boss 12, the second boss 13, and the groove 14. The second metal layer 29 is located on all surfaces of the first sheet structure 24, the second sheet structure 25, the third sheet structure 26, the connecting sheet 27, the capacitive coupling structure 28, and the fixing holes provided in each sheet structure. This allows electrical connection to be achieved when in close contact.

[0106] In some embodiments, the RF device is a stripline combiner, which specifically includes a cavity 1, a conductive strip 2, a dielectric sheet 3, an insulating support medium 4 and a RF connector 5; a through hole 11 is provided on the side wall of the cavity 1, and a first boss 12, a second boss 13 and a groove 14 are provided on the bottom wall of the cavity 1. The conductive strip 2 is composed of a first filter 21, a second filter 22 and a common conductive strip 23, and the common conductive strip 23 connects the first filter 21 and the second filter 22 for combining. A third fixing hole 31 is provided on the dielectric sheet 3 to achieve fixation using the second boss 13. The insulating support medium 4 is used to space and fix the first sheet structure 24 and the capacitive coupling structure 28. The RF connector 5 is connected to the conductive strip 2 via a metal wire 6 through the through hole 11 to ensure signal input and output.

[0107] In other embodiments, the radio frequency device may also be a resonator, a filter, a multi-frequency filter, a duplexer, a multiplexer, etc., which is not limited here.

[0108] refer to Figure 5 , shows a frequency response diagram of a stripline combiner provided by an embodiment of the present disclosure. Figure 5 As shown, the horizontal axis X is frequency and the vertical axis Y is intensity. Figure 5 It can be seen that the combiner can flexibly realize the function of the combiner and meet the requirements of different frequency bands.

[0109] The stripline RF device provided by the embodiments of the present disclosure has at least the following beneficial effects:

[0110] 1) The conductive tape is fixed inside the confined space corresponding to the cavity by a boss, so the RF device is easy to process and has good consistency, facilitating mass production;

[0111] 2) Multiple sheet structures are connected together by connecting sheets to form a guide strip, which can be fixed using bosses, so the stripline combiner is easy to assemble;

[0112] 3) The sheet structures are placed crosswise to further reduce the overall size of the RF device;

[0113] 4) A dielectric sheet with a dielectric constant greater than 1 is provided at the outer edge of the conduction band. The dielectric sheet is fixed in a confined space by a boss, further reducing the overall size of the RF device.

[0114] 5) By fixing the RF connector on the resonant cavity of the filter instead of using a common resonant cavity to fix the RF connector, the overall size of the RF device is further reduced;

[0115] 6) Placing a groove of a certain width and depth at the position where the common port line is perpendicular to the bottom of the confined space can increase the coupling bandwidth of the common port while reducing the weight of the overall device.

[0116] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0117] The foregoing description is intended only to provide specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments described herein, but rather to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A stripline radio frequency device, characterized in that: include: An annular side wall, a bottom wall, and a cavity formed by the annular side wall and the bottom wall, wherein two filters are disposed in the cavity, the two filters respectively comprising a metal conductive strip, the two metal conductive strips being connected via a common conductive strip, and the two metal conductive strips being respectively suspended and mounted on the bottom wall; The bottom wall is provided with a groove at a position corresponding to the common guide strip; The groove is located within the vertical projection of the common conductive strip on the bottom wall and is recessed in a direction away from the metal conductive strip; The groove is used to increase the coupling bandwidth of the common port corresponding to the common conduction band.

2. The stripline radio frequency device according to claim 1, wherein: A positioning boss is provided on the bottom wall, and the metal guide belt is installed on the bottom wall via the positioning boss.

3. The radio frequency device according to claim 2, characterized in that: The positioning boss includes a first boss and a second boss; The first boss is used to control the installation height of the metal guide belt, and the second boss is used to limit the installation position of the metal guide belt relative to the annular side wall.

4. The radio frequency device according to claim 3, characterized in that: The filter further includes a first dielectric sheet, which is arranged between the metal conductive strip and the first boss.

5. The radio frequency device according to claim 4, characterized in that: The second boss is a positioning post, and the metal guide strip and the first dielectric sheet are respectively provided with positioning holes that cooperate with the positioning post.

6. The radio frequency device according to claim 4, characterized in that: The filter further includes a second dielectric sheet, and the metal conductive strip is provided between the first dielectric sheet and the second dielectric sheet.

7. The stripline radio frequency device according to claim 1, wherein: The two metal conductive strips are respectively provided with input and output terminals at one end away from the common conductive strip, and one end of the common conductive strip is provided with a common terminal; The two input and output terminals and the common terminal are spaced apart from each other and are arranged on the same side of the annular side wall or selectively on two opposite sides of the annular side wall.

8. The stripline radio frequency device according to claim 7, characterized in that: It also includes three radio frequency connectors arranged on the annular side wall, and the two input and output ends and the one common end are respectively connected to the three radio frequency connectors in a one-to-one correspondence.

9. The stripline radio frequency device according to claim 1, wherein: The metal conductive strip includes a plurality of resonance plates and connecting plates that are spaced apart from each other, and adjacent resonance plates are connected via the connecting plates.

10. The stripline radio frequency device according to claim 9, characterized in that: Two connecting plates are provided between adjacent resonant plates, and the two connecting plates are spaced apart and respectively connected to the resonant plates.

11. The stripline radio frequency device according to claim 9, characterized in that: The resonant plate includes a first plate-shaped structure and a second plate-shaped structure, and the first plate-shaped structure and the second plate-shaped structure are connected to each other to form a T-shaped structure.

12. The stripline radio frequency device according to claim 11, characterized in that: In some of the resonant plates, the first sheet-like structure and the second sheet-like structure are arranged from top to bottom, and in some of the resonant plates, the first sheet-like structure and the second sheet-like structure are arranged from bottom to top.

13. The stripline radio frequency device according to claim 11, wherein: A dielectric sheet is provided at a position corresponding to the first sheet-like structure.

14. The stripline radio frequency device according to claim 11, wherein: The metal conductive strip includes three resonant plates that are sequentially spaced apart. The filter further includes a capacitive coupling structure, and the capacitive coupling structure is used to achieve capacitive coupling between the first resonant plate and the third resonant plate.

15. The stripline radio frequency device according to claim 14, characterized in that: The capacitive coupling structure includes a coupling plate and an insulating support medium; The coupling plate is stacked and fixed to the first sheet-like structure; the insulating support medium is located between the first sheet-like structure and the coupling plate.

16. The stripline radio frequency device according to claim 15, characterized in that: The coupling plate includes two first coupling plates and a second coupling plate connected between the two first coupling plates; The first coupling plate is stacked with the first sheet-like structure, and the second coupling plate is stacked with the second sheet-like structure.

17. The stripline radio frequency device according to any one of claims 1 to 16, characterized in that: The two metal conductive strips are integrally formed with the common conductive strip.

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