A filter jumper based on hemispherical resonant cavity

Abstract

The present invention proposes a filter jumper based on a hemispherical resonant cavity. The filter jumper comprises four hemispherical resonant cavities with the same structure, namely, a first hemispherical resonant cavity, a second hemispherical resonant cavity, a third hemispherical resonant cavity, a fourth hemispherical resonant cavity and a fifth hemispherical resonant cavity. The second hemispherical resonant cavity serves as the center of the filter jumper. Moreover, the first hemispherical resonant cavity, the third hemispherical resonant cavity, the fourth hemispherical resonant cavity and the fifth hemispherical resonant cavity are respectively connected to the second hemispherical resonant cavity by notch coupling and are integrally formed, and are symmetrical with respect to the second hemispherical resonant cavity. The first hemispherical resonant cavity is provided with a first input port, the third hemispherical resonant cavity is provided with a first output port, the fourth hemispherical resonant cavity is provided with a second input port, and the fifth hemispherical resonant cavity is provided with a second output port.

Description

Technical Field

[0001] The invention relates to the technical field of wireless communication, and in particular to a filtering jumper based on a hemispherical resonant cavity. Background Art

[0002] In recent years, wireless communication technology has developed rapidly in the industrial and consumer electronics industries, and a variety of high-performance microwave devices are in great demand. Filters are extremely important components in RF circuits. Their main function is to select the frequency signals to be sent and received, and to remove unnecessary frequency signals, thereby ensuring the accuracy of the sent and received signals. The jumper is a passive device commonly used in microwave circuits. It can realize the cross-transmission of signals from several channels while ensuring the isolation between different transmission channels. It is widely used in other wireless RF systems in multi-beam antenna feed networks. Jumpers generally achieve the signal bridging function through non-planar structures such as air bridges, jumpers or punching. This traditional non-planar jumper is not only not conducive to integration with other microwave passive devices, but also increases the processing cost and complexity of the circuit. Therefore, in recent years, research on jumpers has mainly focused on the design of jumpers through planar structures.

[0003] In recent years, in order to achieve the goal of miniaturization and integration, the functional fusion design of filters and jumpers, that is, the design of filter jumpers, has attracted widespread attention. In the low-frequency band (frequency band below 6GHz), some scholars have used microstrip lines to realize the design of filter jumpers. However, the research in the high-frequency band is not yet sufficient. At present, some scholars have realized the design of filter jumpers through substrate integrated waveguide (SIW) technology, but the quality factor (Q) of the SIW structure is relatively low, which has great disadvantages in microwave passive circuits that require high Q values. In recent years, waveguide devices have unique advantages in high-frequency bands due to their low insertion loss and high Q value. However, the research and design of waveguide filter jumpers are not sufficient. The filter jumper based on the hemispherical resonant cavity proposed in this paper is a functional fusion waveguide device.

[0004] Compared with rectangular and cylindrical metal waveguide resonators, spherical resonators have higher Q values. Although hemispherical resonators do not have the high symmetry of spherical resonators, they still have a certain symmetry relative to the circular bottom surface. They inherit the advantages of spherical resonators and have many degenerate modes, which can be used to design filter jumpers. In addition, the hemispherical resonator has a half volume compared to the spherical one, which makes it easy to further miniaturize. Summary of the invention

[0005] Purpose of the invention: In order to solve the above technical problems, the present invention proposes a filtering jumper based on a hemispherical resonant cavity.

[0006] Technical solution: In order to solve the above technical problems, the present invention discloses a filtering jumper based on a hemispherical resonant cavity, which includes four hemispherical resonant cavities 100, 200, 300, 400, and 500 with the same structure.

[0007] The second hemispherical resonant cavity 200 is used as the center of the filter jumper, and the first hemispherical resonant cavity 100, the third hemispherical resonant cavity 300, the fourth hemispherical resonant cavity 400, and the fifth hemispherical resonant cavity 500 are respectively connected to the second hemispherical resonant cavity 200 by notch coupling and are integrally formed, and are symmetrical about the second hemispherical resonant cavity 200, and the first hemispherical resonant cavity 100, the fifth hemispherical resonant cavity 500, the third hemispherical resonant cavity 300, and the fourth hemispherical resonant cavity 400 are adjacent to each other in sequence, and a first straight line formed by a line connecting the bottom sphere centers of the first hemispherical resonant cavity 100 and the third hemispherical resonant cavity 300 passes through the center of the second hemispherical resonant cavity 200, and a second straight line formed by a line connecting the bottom sphere centers of the fourth hemispherical resonant cavity 400 and the fifth hemispherical resonant cavity 500 passes through the center of the second hemispherical resonant cavity 200, and the first straight line is perpendicular to the second straight line;

[0008] like Figure 2 As shown, the first hemispherical resonant cavity 100, the third hemispherical resonant cavity 300, the fourth hemispherical resonant cavity 400, and the fifth hemispherical resonant cavity 500 are coupled with the second hemispherical resonant cavity 200 through the first notch 210, the second notch 230, the third notch 240, and the fourth notch 250, respectively, to form an integral body.

[0009] The first hemispherical resonant cavity 100 is provided with a first input port 110, wherein the first input port includes a first coaxial probe 101 and a first coaxial feeding connector, the first coaxial probe 101 is inserted into the first hemispherical resonant cavity 100 along a direction parallel to the bottom surface of the first hemispherical resonant cavity 100, and the first coaxial feeding connector is arranged on the outer end of the first coaxial probe 101; and the projection of the first coaxial probe 101 on the bottom surface of the first hemispherical resonant cavity 100 is located on a first straight line;

[0010] The third hemispherical resonant cavity 300 is provided with a first output port 330, wherein the first output port 330 includes a third coaxial probe 303 and a third coaxial feeding connector, the third coaxial probe 303 is inserted into the third hemispherical resonant cavity 300 along a direction parallel to the bottom surface of the third hemispherical resonant cavity 300, and the third coaxial feeding connector is arranged on the outer end of the third coaxial probe 303; and the projection of the third coaxial probe 303 on the bottom surface of the third hemispherical resonant cavity 300 is located on the first straight line;

[0011] The fourth hemispherical resonant cavity 400 is provided with a second input port 220, wherein the second input port includes a second coaxial probe 202 and a second coaxial feeding connector, the second coaxial probe 202 is inserted into the fourth hemispherical resonator 400 along a direction parallel to the bottom surface of the fourth hemispherical resonant cavity 400, and the second coaxial feeding connector is arranged on the outer end of the second coaxial probe 202; and the projection of the second coaxial probe 202 on the bottom surface of the fourth hemispherical resonant cavity 400 is located on the second straight line;

[0012] The fifth hemispherical resonant cavity 500 is provided with a second output port 440, wherein the second output port includes a fourth coaxial probe 404 and a fourth coaxial feeding connector, the fourth coaxial probe 404 is inserted into the fifth hemispherical resonant cavity 500 along a direction parallel to the bottom surface of the fifth hemispherical resonant cavity 500, and the fourth coaxial feeding connector is arranged on the outer end of the fourth coaxial probe 404; and the projection of the second coaxial probe 404 on the bottom surface of the fifth hemispherical resonant cavity 500 is located on the second straight line;

[0013] The first through hole 111 is disposed at the center of the bottom surface of the first hemispherical resonant cavity 100 and is placed transversely along the x-axis, with its transverse center line coinciding with the x-axis.

[0014] The second through hole 222 is disposed at the center of the bottom surface of the second hemispherical resonant cavity 200. Two straight through holes are placed crosswise to form a second cross-shaped through hole, the center point of which coincides with the junction of the x-axis and the y-axis.

[0015] The third through hole 333 is disposed at the center of the bottom surface of the third hemispherical resonant cavity 300 and is placed transversely along the x-axis, with its transverse center line coinciding with the x-axis.

[0016] The fourth through hole 444 is disposed at the center of the bottom surface of the fourth hemispherical resonant cavity 400 and is placed longitudinally along the y-axis, with its longitudinal center line coinciding with the y-axis.

[0017] The fifth through hole 555 is disposed at the center of the bottom surface of the fifth hemispherical resonant cavity 500 and is placed longitudinally along the y-axis, with its longitudinal center line coinciding with the y-axis.

[0018] It can be seen that the filter jumper based on the hemispherical resonant cavity disclosed in the present invention is a filter jumper with a high quality factor and low insertion loss. Compared with the prior art, it has at least the following characteristics:

[0019] The first channel is set up: composed of a first input port, a first output port, a first hemispherical resonant cavity, a second hemispherical resonant cavity, a third hemispherical resonant cavity, a first coupling notch, a third coupling notch, a first coaxial probe, and a third coaxial probe. The first channel can obtain a single-passband third-order filtering response and obtain corresponding high quality coefficient and low insertion loss performance during operation. The first notch between the first hemispherical resonant cavity and the second hemispherical resonant cavity can be used to transmit electromagnetic energy between the first hemispherical resonant cavity and the second hemispherical resonant cavity, and the second notch between the second hemispherical resonant cavity and the third hemispherical resonant cavity can be used to transmit electromagnetic energy between the second hemispherical resonant cavity and the third hemispherical resonant cavity; when the first input port is loaded with a signal, the electromagnetic energy transmits energy to the first output port through the first channel.

[0020] The second channel is set up: consisting of a second input port, a second output port, a fourth hemispherical resonant cavity, a second hemispherical resonant cavity, a fifth hemispherical resonant cavity, a second notch, a fourth notch, a second coaxial probe, and a fourth coaxial probe. The second channel can obtain a single-passband third-order filtering response and obtain corresponding high quality coefficient and low insertion loss performance during operation. The third notch between the fourth hemispherical resonant cavity and the second hemispherical resonant cavity can be used to transmit electromagnetic energy between the fourth hemispherical resonant cavity and the second hemispherical resonant cavity, and the fourth notch between the second hemispherical resonant cavity and the fifth hemispherical resonant cavity can be used to transmit electromagnetic energy between the second hemispherical resonant cavity and the fifth hemispherical resonant cavity; when the second input port is loaded with a signal, the electromagnetic energy transmits energy to the second output port through the second channel. Since a pair of orthogonal degenerate modes (TM) are used in the hemispherical resonant cavity, the electromagnetic energy is transmitted to the second output port through the second channel. 210A ,TM 201B mode), because of the natural orthogonality of the mode, good isolation is formed between the first channel and the second channel, forming the function of filter cross-connection.

[0021] As an optional embodiment, in the present invention, in order to facilitate 3D printing, a cross-shaped through hole is set at the bottom of the second hemispherical resonant cavity, and a first through hole, a third through hole, a fourth through hole and a fifth through hole are set at the bottom of the first hemispherical resonant cavity, the third hemispherical resonant cavity, the fourth hemispherical resonant cavity and the fifth hemispherical resonant cavity, wherein the first through hole and the third through hole are collinear with the x-axis, and the fourth through hole and the fifth through hole are collinear with the y-axis, and the setting of these through holes does not affect the return loss.

[0022] Beneficial effects: Compared with the prior art, the technical solution of the present invention has the following beneficial technical effects:

[0023] (1) This jumper realizes the function of filtering jumper by rationally using orthogonal degenerate modes, and reduces the volume compared with traditional metal waveguide devices;

[0024] (2) By opening holes in the bottom properly, the device can be manufactured using 3D printing technology, thus reducing the weight of the device;

[0025] (3) Compared with rectangular and cylindrical resonators, hemispherical resonators have higher Q values. The function of the filter jumper implemented in this patent has better application scenarios in wireless communication systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of a filter jumper based on a hemispherical resonant cavity according to an embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of the internal structure of a filter jumper based on a hemispherical resonant cavity according to an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the plane position of an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of the positions of the bottom through holes in an embodiment of the present invention;

[0031] Figure 5 It is a first channel S parameter simulation and test diagram of a filter jumper based on a hemispherical resonant cavity according to an embodiment of the present invention;

[0032] Figure 6 It is an S parameter simulation and test diagram of the second channel of a filtering jumper based on a hemispherical resonant cavity according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The terms "first", "second" and the like in the specification, claims and the above drawings of the present invention are used to distinguish different objects rather than to describe a specific order.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] like Figures 1 to 4 As shown, an embodiment of the present invention discloses a filtering jumper 1000 based on a hemispherical resonant cavity, which includes four hemispherical resonant cavities 100, 200, 300, 400, and 500 with the same structure.

[0037] The second hemispherical resonant cavity 200 is used as the center of the filter jumper, and the first hemispherical resonant cavity 100, the third hemispherical resonant cavity 300, the fourth hemispherical resonant cavity 400, and the fifth hemispherical resonant cavity 500 are respectively connected to the second hemispherical resonant cavity 200 by notch coupling and are integrally formed, and are symmetrical about the second hemispherical resonant cavity 200, and the first hemispherical resonant cavity 100, the fifth hemispherical resonant cavity 500, the third hemispherical resonant cavity 300, and the fourth hemispherical resonant cavity 400 are adjacent to each other in sequence, and a first straight line formed by a line connecting the bottom sphere centers of the first hemispherical resonant cavity 100 and the third hemispherical resonant cavity 300 passes through the center of the second hemispherical resonant cavity 200, and a second straight line formed by a line connecting the bottom sphere centers of the fourth hemispherical resonant cavity 400 and the fifth hemispherical resonant cavity 500 passes through the center of the second hemispherical resonant cavity 200, and the first straight line is perpendicular to the second straight line;

[0038] like Figure 2 As shown, the first hemispherical resonant cavity 100, the third hemispherical resonant cavity 300, the fourth hemispherical resonant cavity 400, and the fifth hemispherical resonant cavity 500 are coupled with the second hemispherical resonant cavity 200 through the first notch 210, the second notch 230, the third notch 240, and the fourth notch 250, respectively, to form an integral body.

[0039] The first hemispherical resonant cavity 100 is provided with a first input port 110, wherein the first input port includes a first coaxial probe 101 and a first coaxial feeding connector, the first coaxial probe 101 is inserted into the first hemispherical resonant cavity 100 along a direction parallel to the bottom surface of the first hemispherical resonant cavity 100, and the first coaxial feeding connector is arranged on the outer end of the first coaxial probe 101; and the projection of the first coaxial probe 101 on the bottom surface of the first hemispherical resonant cavity 100 is located on a first straight line;

[0040] The third hemispherical resonant cavity 300 is provided with a first output port 330, wherein the first output port 330 includes a third coaxial probe 303 and a third coaxial feeding connector, the third coaxial probe 303 is inserted into the third hemispherical resonant cavity 300 along a direction parallel to the bottom surface of the third hemispherical resonant cavity 300, and the third coaxial feeding connector is arranged on the outer end of the third coaxial probe 303; and the projection of the third coaxial probe 303 on the bottom surface of the third hemispherical resonant cavity 300 is located on the first straight line;

[0041] The fourth hemispherical resonant cavity 400 is provided with a second input port 220, wherein the second input port includes a second coaxial probe 202 and a second coaxial feeding connector, the second coaxial probe 202 is inserted into the fourth hemispherical resonator 400 along a direction parallel to the bottom surface of the fourth hemispherical resonant cavity 400, and the second coaxial feeding connector is arranged on the outer end of the second coaxial probe 202; and the projection of the second coaxial probe 202 on the bottom surface of the fourth hemispherical resonant cavity 400 is located on the second straight line;

[0042] The fifth hemispherical resonant cavity 500 is provided with a second output port 440, wherein the second output port includes a fourth coaxial probe 404 and a fourth coaxial feeding connector, the fourth coaxial probe 404 is inserted into the fifth hemispherical resonant cavity 500 along a direction parallel to the bottom surface of the fifth hemispherical resonant cavity 500, and the fourth coaxial feeding connector is arranged on the outer end of the fourth coaxial probe 404; and the projection of the second coaxial probe 404 on the bottom surface of the fifth hemispherical resonant cavity 500 is located on the second straight line;

[0043] The first through hole 111 is disposed at the center of the bottom surface of the first hemispherical resonant cavity 100 and is placed transversely along the x-axis, with its transverse center line coinciding with the x-axis.

[0044] The second through hole 222 is disposed at the center of the bottom surface of the second hemispherical resonant cavity 200. Two straight through holes are placed crosswise to form a second cross-shaped through hole, the center point of which coincides with the junction of the x-axis and the y-axis.

[0045] The third through hole 333 is disposed at the center of the bottom surface of the third hemispherical resonant cavity 300 and is placed transversely along the x-axis, with its transverse center line coinciding with the x-axis.

[0046] The fourth through hole 444 is disposed at the center of the bottom surface of the fourth hemispherical resonant cavity 400 and is placed longitudinally along the y-axis, with its longitudinal center line coinciding with the y-axis.

[0047] The fifth through hole 555 is disposed at the center of the bottom surface of the fifth hemispherical resonant cavity 500 and is placed longitudinally along the y-axis, with its longitudinal center line coinciding with the y-axis.

[0048] In the embodiment of the present invention, the hemispherical resonant cavity used is half of the spherical resonant cavity. The electromagnetic field distribution corresponding to the hemispherical resonant cavity is similar to that of the spherical resonant cavity, and has a pair of orthogonal degenerate modes TM 210A ,TM 201B mode, which enables the filter coupler based on the hemispherical resonant cavity of the embodiment of the present invention to form a third-order filtering response on two channels, and due to the orthogonality of the mode, good isolation between channels can be obtained.

[0049] In the embodiment of the present invention, since the filter jumper is a four-port network, and the size of the four rectangular waveguide ports is too large and cannot be reasonably arranged at the edge of the maximum diameter of the hemispherical resonator, the filter jumper based on the hemispherical resonant cavity selects coaxial probe excitation, and sets input and output ports at appropriate positions of the hemispherical resonant cavity, and adjusts the length of the metal probe inserted into the hemispherical resonator to achieve good impedance matching between the port and the resonator, so that most of the energy is transmitted to the hemispherical waveguide resonant cavity.

[0050] In the embodiment of the present invention, Figure 2 Because the TM selected in this embodiment 201A ,TM 201B The electric field distribution inherent to the mode. When a signal is loaded to the first input port 110, electromagnetic energy excites TE through the first coaxial probe. ,201A mode without activating TM 201B mode, the signal is transmitted to the third coaxial probe 303 and then to the first output port 330, but not to the second output port 440, and the first channel is naturally isolated from the second channel.

[0051] Similarly, when the second input port 220 is loaded with a signal, TM 201B Mode, electromagnetic energy transmits the signal to the fourth coaxial probe 404 through the third coaxial probe 303 and then to the second output port 440, and the signal cannot be transmitted to the first input port 110, and good isolation is achieved between the two input ports. In summary, this device based on the hemispherical resonant cavity realizes the function of filtering crossover.

[0052] In some specific embodiments of the present invention, Figure 2 As shown, the lengths l1, l2, l3, l4 of the first coaxial probe 101, the second coaxial probe 202, the third coaxial probe 303 and the fourth coaxial probe 404 and the heights h1, h2, h3, h4 relative to the hemispherical resonator can control the coupling between the input and output ports of the device and the resonator, and adjust them to appropriate lengths to achieve good return loss.

[0053] In some specific embodiments of the present invention, as shown in FIG2 , the first notch 210, the second notch 230, the third notch 240, and the third notch 250 are semi-cylindrical. The four notches control the coupling between the two hemispherical resonant cavities, and the design of the semi-cylindrical shape makes it easier to transmit energy, with less energy loss, so that the single-passband filter jumper based on the hemispherical resonant cavity has better performance.

[0054] The following will provide some key size parameters of the single-passband filter jumper based on the hemispherical resonant cavity for reference in production and manufacturing. 7 S / m metal is used as the cavity boundary. The hemispherical resonator can be made of nylon material (PA12) with a thickness of 1mm and prepared by three-dimensional printing, i.e. stereolithography technology. After the model is printed, a 6μm thick copper layer is plated on the surface to form a metal waveguide cavity. Among them, the second hemispherical resonant cavity r2 = 17.8mm, and the radius of the first, third, fourth and fifth hemispherical resonant cavities r1 = r3 = r4 = r5 = 18.0mm. Figure 3 As shown, the depths of the metal probes inserted into the cavities of the four coaxial feed connectors are all 7.25 mm. The widths of the first, second, third, and fourth semi-cylindrical notches are w1 = 2.2 mm, the radius r2 = 5.0 mm, and the heights h1, h2, h3, and h4 from the circular bottom surface of the hemispherical resonator are all 4.1 mm. To facilitate manufacturing, a through groove is added at the bottom of the device, such as Figure 4 The first, third, fourth and fifth through holes are set to t1 = 4 mm, t2 = 1 mm, and the second through hole is composed of two I-shaped through grooves arranged crosswise, with a top and bottom height of t1 = 4 mm, and the length and width of the two I-shaped through grooves are t1 = 4 mm, t2 = 1 mm.

[0055] like Figure 5 , which are the S parameter simulation and test results of a first channel single-passband filter jumper based on a hemispherical resonant cavity according to an embodiment of the present invention. 11 represents the reflection coefficient of the first input port, S 31 represents the transmission coefficient from the first input port to the first output port, S 21 represents the transmission coefficient from the first input port to the second input port, S 41 It represents the transmission coefficient from the first input port to the second output port. The figure shows that the center frequency of a single-passband filter jumper based on a hemispherical resonant cavity according to an embodiment of the present invention is 10.28 GHz, corresponding to a 3 dB bandwidth frequency of 240 MHz. The minimum in-band insertion loss obtained by simulation is about 0.03 dB, the maximum return loss between the first input port and the second input port is 20 dB, and the isolation between the first channel and the second channel is 28 dB.

[0056] like Figure 6, which are the S parameter simulation and test results of a second channel single passband filter jumper based on a hemispherical resonant cavity according to an embodiment of the present invention. 22 represents the reflection coefficient of the second input port, S 24 represents the transmission coefficient from the second input port to the second output port, S 12 represents the transmission coefficient from the second input port to the first input port, S 32 It represents the transmission coefficient from the second input port to the first output port. The figure shows that the center frequency of a single-passband filter jumper based on a hemispherical resonant cavity according to an embodiment of the present invention is 10.28 GHz, corresponding to a 3 dB bandwidth frequency of 240 MHz. The minimum in-band insertion loss obtained by simulation is about 0.03 dB, the maximum return loss between the first input port and the second input port is 20 dB, and the isolation between the first channel and the second channel is 28 dB.

[0057] Finally, it should be noted that: the filter jumper based on a hemispherical resonant cavity disclosed in the embodiment of the present invention is only a preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the aforementioned embodiment, ordinary technicians in the field should understand that it is still possible to modify the technical solution recorded in the aforementioned embodiment, or to replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the present invention. Finally, it should be noted that: the filter jumper based on a hemispherical resonant cavity disclosed in the embodiment of the present invention is only a preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the aforementioned embodiment, ordinary technicians in the field should understand that it is still possible to modify the technical solution recorded in the aforementioned embodiment, or to replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the present invention.

Claims

1. A filter jumper based on a hemispherical resonant cavity, characterized in that: The filter jumper comprises a first hemispherical resonant cavity (100), a second hemispherical resonant cavity (200), a third hemispherical resonant cavity (300), a fourth hemispherical resonant cavity (400), and a fifth hemispherical resonant cavity (500); wherein the first hemispherical resonant cavity (100), the third hemispherical resonant cavity (300), the fourth hemispherical resonant cavity (400), and the fifth hemispherical resonant cavity (500) have the same structure; The second hemispherical resonant cavity (200) serves as the center of the filter jumper, and the first hemispherical resonant cavity (100), the third hemispherical resonant cavity (300), the fourth hemispherical resonant cavity (400), and the fifth hemispherical resonant cavity (500) are respectively connected to the second hemispherical resonant cavity (200) by notch coupling and are symmetrical about the second hemispherical resonant cavity (200). The spherical resonant cavity (300) and the fourth hemispherical resonant cavity (400) are adjacent to each other in sequence, and a first straight line formed by a line connecting the bottom surface centers of the first hemispherical resonant cavity (100) and the third hemispherical resonant cavity (300) passes through the bottom surface center of the second hemispherical resonant cavity (200), and a second straight line formed by a line connecting the bottom surface centers of the fourth hemispherical resonant cavity (400) and the fifth hemispherical resonant cavity (500) passes through the bottom surface center of the second hemispherical resonant cavity (200), and the first straight line is perpendicular to the second straight line; The first hemispherical resonant cavity (100) is provided with a first input port (110), the third hemispherical resonant cavity (300) is provided with a first output port (330), the fourth hemispherical resonant cavity (400) is provided with a second input port (220), and the fifth hemispherical resonant cavity (500) is provided with a second output port (440).

2. A filter jumper based on a hemispherical resonant cavity according to claim 1, characterized in that: The first input port (110) comprises a first coaxial probe (101) and a first coaxial feeding connector, the first coaxial probe (101) being inserted into the first hemispherical resonant cavity (100) along a direction parallel to the bottom surface of the first hemispherical resonant cavity (100), and the first coaxial feeding connector being arranged on the outer end of the first coaxial probe (101); and the projection of the first coaxial probe (101) on the bottom surface of the first hemispherical resonant cavity (100) is located on a first straight line.

3. The filtering jumper based on the hemispherical resonant cavity according to claim 1, characterized in that: The first output port (330) comprises a third coaxial probe (303) and a third coaxial feeding connector. The third coaxial probe (303) is inserted into the interior of the third hemispherical resonant cavity (300) along a direction parallel to the bottom surface of the third hemispherical resonant cavity (300). The third coaxial feeding connector is arranged on the outer end of the third coaxial probe (303). The projection of the third coaxial probe (303) on the bottom surface of the third hemispherical resonant cavity (300) is located on the first straight line.

4. The filtering jumper based on the hemispherical resonant cavity according to claim 1 is characterized in that: The second input port (220) comprises a second coaxial probe (202) and a second coaxial feeding connector. The second coaxial probe (202) is inserted into the fourth hemispherical resonant cavity (400) along a direction parallel to the bottom surface of the fourth hemispherical resonant cavity (400). The second coaxial feeding connector is arranged on the outer end of the second coaxial probe (202). Furthermore, the projection of the second coaxial probe (202) on the bottom surface of the fourth hemispherical resonant cavity (400) is located on a second straight line.

5. The filtering jumper based on the hemispherical resonant cavity according to claim 1 is characterized in that: The second output port (440) comprises a fourth coaxial probe (404) and a fourth coaxial feeding connector, the fourth coaxial probe (404) being inserted into the interior of the fifth hemispherical resonant cavity (500) along a direction parallel to the bottom surface of the fifth hemispherical resonant cavity (500), and the fourth coaxial feeding connector being arranged on the outer end of the fourth coaxial probe (404); and the projection of the second coaxial probe (202) on the bottom surface of the fifth hemispherical resonant cavity (500) is located on a second straight line.

6. The filtering jumper based on the hemispherical resonant cavity according to claim 1, characterized in that: A first through hole (111) is provided at the center of the bottom surface of the first hemispherical resonant cavity (100), which is disposed transversely along the x-axis, and whose transverse center line coincides with the x-axis; A second through hole (222) is provided at the center of the bottom surface of the second hemispherical resonant cavity (200); the second through hole is a cross-shaped through hole, and its transverse center line and longitudinal center line coincide with the x-axis and y-axis respectively; A third through hole (333) is provided at the center of the bottom surface of the third hemispherical resonant cavity (300), which is arranged transversely along the x-axis, and whose transverse center line coincides with the x-axis; A fourth through hole (444) is provided at the center of the bottom surface of the fourth hemispherical resonant cavity (400), which is disposed longitudinally along the y-axis, and whose longitudinal center line coincides with the y-axis; A fifth through hole (555) is provided at the center of the bottom surface of the fifth hemispherical resonant cavity (500), and is placed longitudinally along the y-axis, with its longitudinal center line coinciding with the y-axis.

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