Resonant cavity system

Abstract

The invention belongs to the technical field of waveguide equipment, and particularly relates to a resonant cavity system, which replaces a corner and torsion waveguide structure in an original combined waveguide structure through the matching relationship of a gradient conductor, a through hole and a signal transmission channel, effectively reduces the processing difficulty of a waveguide cavity, and improves the processing efficiency. In addition, the outer wall surface of the integrated waveguide cavity is provided with a circuit waveguide cavity for installing the centimeter-wave transmitting circuit tail end and the centimeter-wave receiving circuit tail end, so that the space utilization rate of the waveguide cavity is effectively improved, and independent arrangement of the centimeter-wave transmitting circuit tail end and the centimeter-wave receiving circuit tail end is effectively ensured; and the tail end of the centimeter wave transmitting circuit is highly isolated from the tail end of the centimeter wave receiving circuit, so that the front end of the centimeter wave feed-in excitation cavity resonant cavity system is miniaturized and integrated.

Description

Technical Field

[0001] The present invention belongs to the technical field of waveguide devices, and specifically relates to a resonant cavity system. Background Art

[0002] In modern medical technology, the feed-in excitation cavity resonator, as a key component for signal processing and resonant output, plays a crucial role. The feed-in excitation cavity resonator has high Q value, low loss, good frequency selectivity and temperature stability, and is particularly suitable for microwave and centimeter-wave medical equipment systems.

[0003] The basic properties of centimeter waves usually exhibit three characteristics: penetration, reflection, and absorption. For glass, plastic, and porcelain, centimeter waves can almost pass through without being absorbed. For water and food, etc., centimeter waves will be absorbed to cause self-heating. For metals, centimeter waves will be reflected.

[0004] Centimeter waves have a longer wavelength than other electromagnetic waves used for radiation heating, such as infrared rays and far-infrared rays, so they have better penetration. When centimeter waves penetrate into a medium, due to the increase in the medium temperature caused by medium loss, the inside and outside of the medium are heated and raised in temperature almost simultaneously, greatly shortening the heat conduction time in conventional heating.

[0005] Clinically, conventional ordinary centimeter-wave therapy machines are used for physical therapy. The application range has a certain health care effect on the neck, shoulders, chest, waist, buttocks, knees, legs, and arms, and can prevent or relieve.

[0006] Due to its unique characteristics, it overcomes the disadvantages of easy overheating of radio frequency fat and muscle clumping, solves the technical problems of deep microwave heating, and can be used for both superficial and deep heating, and can also achieve the effect of whole-body heating. Therefore, it has become a new highlight in the current hyperthermia market. However, in the conventional centimeter-wave waveguide structures used in centimeter-wave therapy machines on the market, corner and twisted waveguide structures are mostly used, which have problems such as large processing difficulty of the waveguide cavity and low space utilization rate.

[0007] In view of this, the present invention proposes a resonant cavity system to solve the above technical problems. Summary of the Invention

[0008] In order to make up for the deficiencies of the prior art and solve the above technical problems, the present invention proposes a resonant cavity system.

[0009] The technical solution adopted by the present invention to solve its technical problems is: a resonant cavity system described in the present invention includes a centimeter-wave feed-in excitation cavity resonator structure;

[0010] The centimeter-wave feed-in excitation cavity resonator structure includes an integrated waveguide cavity, an integrated waveguide cavity cover, an excitation slope waveguide cavity, and an excitation slope waveguide cavity cover;

[0011] The excitation gradient waveguide cavity and the excitation gradient waveguide cavity cover are arranged between the integrated waveguide cavity and the integrated waveguide cavity cover;

[0012] An excitation circuit waveguide cavity is arranged between the excitation gradient waveguide cavity and the integrated waveguide cavity cover, and a controllable circuit waveguide cavity is arranged between the integrated waveguide cavity and the excitation gradient waveguide cavity;

[0013] Through holes are jointly arranged on the integrated waveguide cavity and the excitation gradient waveguide cavity. The two ends of the through holes respectively correspond to the excitation gradient waveguide cavity cover and the integrated waveguide cavity. A gradient conductor is arranged in the through hole, and the gradient conductor is used to realize the signal transmission connection between the controllable circuit waveguide cavity and the excitation circuit waveguide cavity.

[0014] Preferably, the integrated waveguide cavity has a plurality of outer wall surfaces corresponding to the excitation gradient waveguide cavity cover. A circuit waveguide cavity is arranged between the outer wall surface and the excitation gradient waveguide cavity cover. A signal transmission channel is arranged in the integrated waveguide cavity. A channel port is arranged on the outer wall surface, and the channel port corresponds to the signal transmission channel.

[0015] Preferably, at least two excitation gradient waveguide cavities are arranged between the integrated waveguide cavity cover and the integrated waveguide cavity.

[0016] Preferably, it further includes a centimeter-wave resonant circuit waveguide cavity, and the centimeter-wave resonant circuit waveguide cavity is formed by stamping stainless steel materials.

[0017] Preferably, the centimeter-wave resonant circuit waveguide cavity has no screw fixing holes on the flange edge, and the centimeter-wave magnetron emission head is welded and installed on the centimeter-wave resonant circuit waveguide cavity.

[0018] Preferably, the centimeter-wave resonant circuit waveguide cavity has screw fixing holes on the flange edge. The top of the centimeter-wave resonant circuit waveguide cavity is flat. Four fixing plates are installed on the side of the centimeter-wave resonant circuit waveguide cavity, and fixing holes are opened on each of the fixing plates.

[0019] Preferably, it further includes a signal source, a local oscillator drive circuit, the end of a centimeter-wave transmitting circuit, and the end of a centimeter-wave receiving circuit;

[0020] The signal source is arranged inside the excitation circuit waveguide cavity. The local oscillator drive circuit is arranged in the controllable circuit waveguide cavity. The end of the centimeter-wave transmitting circuit and the end of the centimeter-wave receiving circuit are respectively arranged in the circuit waveguide cavity. The output end of the signal source is connected to the signal input end of the local oscillator drive circuit. The signal output end of the local oscillator drive circuit is connected to the signal input ends of the end of the centimeter-wave transmitting circuit and the end of the centimeter-wave receiving circuit.

[0021] The beneficial effects of the present invention are as follows:

[0022] A resonant cavity system according to the present invention replaces the corner and twisted waveguide structures in the original combined waveguide structure through the cooperation relationship of the slope conductor, through holes, and signal transmission channels, effectively reducing the processing difficulty of the waveguide cavity. In addition, by arranging a circuit waveguide cavity on the outer wall surface of the integrated waveguide cavity to install the end of the centimeter-wave transmitting circuit and the end of the centimeter-wave receiving circuit, not only the space utilization rate of the waveguide cavity is effectively improved, but also the independent setting of the end of the centimeter-wave transmitting circuit and the end of the centimeter-wave receiving circuit, as well as the high isolation between the end of the centimeter-wave transmitting circuit and the end of the centimeter-wave receiving circuit, are effectively guaranteed, realizing the miniaturized integrated setting at the front end of the centimeter-wave fed excitation cavity resonant cavity system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 is a schematic diagram of the resonant cavity system in the present invention;

[0025] Figure 2 is a schematic diagram of the structure principle of the centimeter-wave fed excitation cavity resonant cavity;

[0026] In the figure: 1, integrated conductor; 2, end of centimeter-wave receiving circuit; 3, signal transmission channel; 4, end of transmitting circuit; 5, centimeter-wave fed excitation cavity resonant cavity structure; 6, slope conductor; 7, circuit waveguide cavity; 8, centimeter-wave resonant cavity system; 9, magnetron emission head; 10, end of centimeter-wave transmitting circuit; 11, local oscillator drive circuit; 12, electronic medical device; 13, dielectric resonator; 14, waveguide cavity; 15, input port; 16, output port; 17, coupling structure; 18, steep transition band and narrow bandwidth device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the technical means, creative features, achieved purposes, and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0028] As Figure 1-2 shown, a resonant cavity system according to the present invention includes a centimeter-wave fed excitation cavity resonant cavity structure;

[0029] The centimeter-wave fed excitation cavity resonant cavity structure includes an integrated waveguide cavity, an integrated waveguide cavity cover, an excitation slope waveguide cavity, and an excitation slope waveguide cavity cover;

[0030] The excitation slope waveguide cavity and the excitation slope waveguide cavity cover are arranged between the integrated waveguide cavity and the integrated waveguide cavity cover;

[0031] An excitation circuit waveguide cavity is provided between the excitation slope waveguide cavity and the integrated waveguide cavity cover, and a controllable circuit waveguide cavity is provided between the integrated waveguide cavity and the excitation slope waveguide cavity;

[0032] Through holes are commonly provided on the integrated waveguide cavity and the excitation slope waveguide cavity. The two ends of the through holes correspond to the excitation slope waveguide cavity cover and the integrated waveguide cavity respectively. A slope conductor 6 is provided in the through holes, and the slope conductor 6 is used to realize the signal transmission connection between the controllable circuit waveguide cavity and the excitation circuit waveguide cavity.

[0033] The integrated waveguide cavity has a plurality of outer wall surfaces corresponding to the excitation slope waveguide cavity cover. A circuit waveguide cavity 7 is provided between the outer wall surface and the excitation slope waveguide cavity cover. A signal transmission channel 3 is provided in the integrated waveguide cavity, and a channel port is provided on the outer wall surface, and the channel port corresponds to the signal transmission channel 3.

[0034] At least two excitation slope waveguide cavities are provided between the integrated waveguide cavity cover and the integrated waveguide cavity.

[0035] It further includes a centimeter-wave resonant circuit waveguide cavity, which is formed by stamping stainless steel materials. The external dimensions are: the bottom plate is 120 mm long * 70 mm wide, the flange side is 100 mm long * 100 mm wide, the opening size is 88 * 88 mm, and the inner diameter size is: 60 * 85 mm.

[0036] The feed-in excitation cavity resonator structure of the present invention further includes a 15° slope transition structure and an 80 * 80 metal structure. The 15° slope transition structure is used to cooperate with the resonator conductor to realize the transmission connection of the resonant signals of the circuit waveguide cavity 7 and the centimeter-wave circuit waveguide cavity 7. For the 15° slope transition structure mode, its electric field presents a half-sine wave distribution in the wide side direction of the waveguide, and the electric field is uniformly distributed in the narrow side direction. When using a wave port for excitation and processing a physical object of the 15° slope transition structure for testing, it is realized by extending the inner conductor of the coaxial cable by a 15° slope. Extending a small section of the inner conductor of the coaxial cable into the rectangular waveguide is equivalent to a small electric dipole. According to the electromagnetic field theory, this small electric dipole will generate an electromagnetic field around it.

[0037] In the present invention, the centimeter-wave cavity opening has a cavity opening size of 45 * 85 mm, which ensures the feed-in of centimeter waves and reduces the centimeter-wave reflux.

[0038] As a preferred embodiment of the present invention, the centimeter-wave resonant circuit waveguide cavity has no screw fixing holes on the flange side, and the centimeter-wave magnetron emitter 9 is welded and installed on the centimeter-wave resonant circuit waveguide cavity, and the welded installation makes the installation strength of the magnetron emitter 9 more stable.

[0039] As a preferred embodiment of the present invention, the waveguide cavity of the centimeter-wave resonant circuit has screw fixing holes on the flange edge, the top of the waveguide cavity of the centimeter-wave resonant circuit is flat, and four fixing plates are installed on the side of the waveguide cavity of the centimeter-wave resonant circuit. Fixing holes are provided on each of the fixing plates, and the arrangement of the fixing plates and the fixing holes improves the convenience of installing the magnetron emission head 9.

[0040] The magnetron feeds centimeter waves into the cavity through the waveguide to perform functions such as physical therapy heating on the human body.

[0041] In the present invention, the relationship between the sloped conductor 6, the through hole, and the signal transmission channel 3 replaces the corner and twisted waveguide structures in the original combined waveguide structure, effectively reducing the processing difficulty of the waveguide cavity. In addition, by providing a circuit waveguide cavity 7 on the outer wall surface of the integrated waveguide cavity to install the end 10 of the centimeter-wave transmitting circuit and the end 2 of the centimeter-wave receiving circuit, not only the space utilization rate of the waveguide cavity is effectively improved, but also the independent setting of the end 10 of the centimeter-wave transmitting circuit and the end 2 of the centimeter-wave receiving circuit, as well as the high isolation between the end 10 of the centimeter-wave transmitting circuit and the end 2 of the centimeter-wave receiving circuit, are effectively ensured, realizing the miniaturized integrated setting of the front end of the centimeter-wave fed excitation cavity resonant cavity system.

[0042] Compared with the combined waveguide structure in the conventional technology, the present invention at least also has the following advantages:

[0043] 1. In the present invention, by satisfying the transverse resonance principle within the waveguide cross-section, electromagnetic waves are confined within the internal region. The main characteristics of the waveguide include low conductor loss and dielectric loss, high power capacity, no radiation loss, and simple structure and easy manufacturing.

[0044] 2. The waveguide resonant cavity structure of the present invention can efficiently add the output power of the power amplifier. The power combining technology based on the waveguide has the advantages of simple structure design, small energy loss, wide operating frequency band, large combining scale, and good heat dissipation performance.

[0045] 3. In the present invention, energy coupling is performed by making a microstrip transmission line with a slope on the wide side of the waveguide to achieve power combination, maximizing the feeding into the excitation cavity and reducing the reflux of centimeter waves, which can further improve the combination efficiency. By precisely designing the cross-sectional shape and size of the waveguide, the coupling and matching between different modes can be optimized, thereby achieving efficient power combination.

[0046] 4. The feed-in excitation cavity resonator is applicable to the waveguide structure for power distribution. In power distribution applications, the waveguide structure can evenly distribute the high-frequency signal power to the centimeter-wave therapy device without mutual interference. Based on waveguide power distribution, it has the characteristics of wide frequency band, simple structure, and low insertion loss. In-phase power distribution waveguide resonator structure: By designing the electromagnetic field distribution inside the waveguide, the load reflection interference power can obtain signals with equal power and the same phase. By adjusting the cross-sectional shape and size of the waveguide and the impedance matching of the load, precise power distribution can be achieved.

[0047] As a preferred embodiment of the present invention, it further includes a signal source, a local oscillator drive circuit 11, the end of the centimeter-wave emission circuit 10, and the end of the centimeter-wave reception circuit 2;

[0048] The signal source is arranged inside the excitation circuit waveguide cavity, the local oscillator drive circuit 11 is arranged inside the controllable circuit waveguide cavity, the end of the centimeter-wave emission circuit 10 and the end of the centimeter-wave reception circuit 2 are respectively arranged inside the circuit waveguide cavity 7. The output end of the signal source is connected to the signal input end of the local oscillator drive circuit 11, and the signal output end of the local oscillator drive circuit 11 is connected to the signal input ends of the end of the centimeter-wave emission circuit 10 and the end of the centimeter-wave reception circuit 2.

[0049] The working principle of the feed-in excitation cavity resonator is based on the interaction between the dielectric resonator 13 and the waveguide structure.

[0050] The dielectric resonator 13 is made of a high-dielectric-constant material (such as ceramic). Electromagnetic waves are repeatedly totally reflected inside the dielectric to form a standing-wave oscillation.

[0051] The waveguide structure 14 is used to guide and restrict the propagation of electromagnetic waves to achieve signal transmission and filtering. By optimizing the design of the size, shape, and arrangement of the dielectric resonator 13, as well as the size and shape of the waveguide structure, the required filtering characteristics can be obtained.

[0052] The structure of the feed-in excitation cavity resonator mainly includes parts such as a waveguide cavity body 14, a dielectric resonator 13, an input port 15, an output port 16, and a coupling structure 17.

[0053] Waveguide cavity body 14: The waveguide cavity body 14 is composed of a metal wall, which is used to restrict the propagation direction of electromagnetic waves and reduce radiation loss. The size and shape of the cavity are designed according to the operating frequency and filtering characteristics.

[0054] Dielectric resonator 13: The dielectric resonator 13 is made of a high-dielectric-constant material and is placed inside the waveguide cavity body 14, and is connected to the input port 15 and the output port 16 through the coupling structure 17. The number, position, and arrangement of the dielectric resonators 13 affect the frequency response and bandwidth of the filter.

[0055] Input port 15 and output port 16: The input port 15 and output port 16 are used to connect the filter and the external circuit to achieve signal input and output. The position and size of the ports are optimized according to the design requirements of the filter and the system requirements.

[0056] Coupling structure 17: The coupling structure is used to achieve energy transfer between the dielectric resonators 13 and the frequency selection of the filter. By adjusting the parameters of the coupling structure, the performance of the filter can be optimized.

[0057] The waveguide cavity dielectric filter has the following significant advantages:

[0058] High Q value: The dielectric resonator 13 has a relatively high quality factor (Q value), which can achieve efficient energy storage and conversion, and improve the frequency selectivity of the filter. Low loss: The design of the waveguide structure and the dielectric resonator 13 reduces the radiation loss and dielectric loss of electromagnetic waves, and improves the transmission efficiency of the filter.

[0059] Good frequency selectivity: By optimizing the parameters of the dielectric resonator 13 and the waveguide structure, a steep transition band and a narrow bandwidth can be obtained to meet the requirements of narrowband signal processing.

[0060] Temperature stability: The dielectric material has good temperature characteristics, so that the filter can still maintain stable filtering performance when the temperature changes.

[0061] The feed-in type excitation cavity resonator is widely used in microwave and centimeter wave communication and medical equipment systems. By optimizing the parameters of the dielectric resonator 13 and the waveguide structure, the required filtering characteristics can be obtained to meet the needs of microwave and millimeter wave communication and medical equipment systems.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A resonant cavity system, comprising a centimeter-wave fed excitation cavity resonant cavity structure; The centimeter-wave fed excitation cavity resonant cavity structure includes an integrated waveguide cavity body, an integrated waveguide cavity cover, an excitation gradient waveguide cavity body, and an excitation gradient waveguide cavity cover; It is characterized in that: The excitation gradient waveguide cavity body and the excitation gradient waveguide cavity cover are arranged between the integrated waveguide cavity body and the integrated waveguide cavity cover; An excitation circuit waveguide cavity is arranged between the excitation gradient waveguide cavity body and the integrated waveguide cavity cover, and a controllable circuit waveguide cavity is arranged between the integrated waveguide cavity body and the excitation gradient waveguide cavity body; Through holes are jointly arranged on the integrated waveguide cavity body and the excitation gradient waveguide cavity body. The two ends of the through holes correspond to the excitation gradient waveguide cavity cover and the integrated waveguide cavity body respectively. A gradient conductor (6) is arranged in the through holes, and the gradient conductor (6) is used to realize the signal transmission connection between the controllable circuit waveguide cavity and the excitation circuit waveguide cavity.

2. The resonant cavity system according to claim 1, wherein: The integrated waveguide cavity body has a plurality of outer wall surfaces corresponding to the excitation gradient waveguide cavity cover. A circuit waveguide cavity (7) is arranged between the outer wall surfaces and the excitation gradient waveguide cavity cover. A signal transmission channel (3) is arranged in the integrated waveguide cavity body. A channel opening is arranged on the outer wall surface, and the channel opening corresponds to the signal transmission channel (3).

3. The resonant cavity system according to claim 2, characterized in that: At least two excitation gradient waveguide cavity bodies are arranged between the integrated waveguide cavity cover and the integrated waveguide cavity body; 4. A resonant cavity system according to claim 3, characterized in that: It further includes a centimeter-wave resonant circuit waveguide cavity, which is formed by stamping stainless steel materials.

5. A resonant cavity system according to claim 4, characterized in that: The centimeter-wave resonant circuit waveguide cavity has no screw fixing holes on the flange edge, and a centimeter-wave magnetron emission head (9) is welded and installed on the centimeter-wave resonant circuit waveguide cavity.

6. A resonant cavity system according to claim 5, characterized in that: The centimeter-wave resonant circuit waveguide cavity has screw fixing holes on the flange edge. The top of the centimeter-wave resonant circuit waveguide cavity is flat. Four fixing plates are installed on the side of the centimeter-wave resonant circuit waveguide cavity, and fixing holes are opened on each of the fixing plates.

7. A resonant cavity system according to claim 6, characterized in that: It further includes a signal source, a local oscillator drive circuit (11), a centimeter-wave emission circuit end (10), and a centimeter-wave reception circuit end (2); The signal source is arranged inside the excitation circuit waveguide cavity, the local oscillator drive circuit (11) is arranged inside the controllable circuit waveguide cavity, the centimeter-wave emission circuit end (10) and the centimeter-wave reception circuit end (2) are respectively arranged inside the circuit waveguide cavity (7). The output end of the signal source is connected to the signal input end of the local oscillator drive circuit (11), and the signal output end of the local oscillator drive circuit (11) is connected to the signal input ends of the centimeter-wave emission circuit end (10) and the centimeter-wave reception circuit end (2).

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