阅读说明：本技术 一种用于皮脂层局部治疗的一体化可调谐医用微波辐射器 (Integrated tunable medical microwave radiator for local treatment of sebaceous layer ) 是由 施金 晏少枨 张威 徐凯 吴钢雄 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种用于皮脂层局部治疗的一体化可调谐医用微波辐射器,SMA接头的金属探针插入第一矩形介质波导谐振腔,第二矩形介质波导位于第一矩形介质波导谐振腔和第二矩形介质波导谐振腔之间,第三矩形介质波导位于第二矩形介质波导谐振腔和第一矩形介质波导之间,介质小块位于第一矩形介质波导和圆形介质托盘中心之间且与两者紧密相连,第一金属螺钉和第二金属螺钉分别插入第一矩形介质波导谐振腔和第二矩形介质波导谐振腔；圆形介质托盘内具有一圈水循环槽。本发明通过同轴馈电的可调谐双矩形介质波导谐振腔与介质托盘进行一体化设计,且具有较宽的匹配带宽以及对工作频率及阻抗匹配调节、皮肤表层降温功能。(The invention discloses an integrated tunable medical microwave radiator for local treatment of a sebaceous layer, wherein a metal probe of an SMA joint is inserted into a first rectangular dielectric waveguide resonant cavity, a second rectangular dielectric waveguide is positioned between the first rectangular dielectric waveguide resonant cavity and a second rectangular dielectric waveguide resonant cavity, a third rectangular dielectric waveguide is positioned between the second rectangular dielectric waveguide resonant cavity and a first rectangular dielectric waveguide, a small dielectric block is positioned between the centers of a first rectangular dielectric waveguide and a circular dielectric tray and is tightly connected with the first rectangular dielectric waveguide resonant cavity and the circular dielectric tray, and a first metal screw and a second metal screw are respectively inserted into the first rectangular dielectric waveguide resonant cavity and the second rectangular dielectric waveguide resonant cavity; a circle of water circulation grooves are arranged in the circular medium tray. The tunable double-rectangular dielectric waveguide resonant cavity and the dielectric tray which are coaxially fed are integrally designed, and the tunable double-rectangular dielectric waveguide resonant cavity has wider matching bandwidth, and has the functions of matching and adjusting working frequency and impedance and cooling the skin surface layer.)

1. An integrated tunable medical microwave radiator for local treatment of a sebaceous layer is characterized by comprising an SMA joint (1), a first rectangular dielectric waveguide resonant cavity (3), a second rectangular dielectric waveguide resonant cavity (4), a first rectangular dielectric waveguide (5), a second rectangular dielectric waveguide (6), a third rectangular dielectric waveguide (7), a dielectric small block (8), a round dielectric tray (9), a first metal screw (11) and a second metal screw (12); wherein, all the media are made of the same material;

a metal probe (2) of the SMA joint (1) is inserted into a first rectangular dielectric waveguide resonant cavity (3), a second rectangular dielectric waveguide (6) is positioned between the first rectangular dielectric waveguide resonant cavity (3) and a second rectangular dielectric waveguide resonant cavity (4), a third rectangular dielectric waveguide (7) is positioned between the second rectangular dielectric waveguide resonant cavity (4) and a first rectangular dielectric waveguide (5), a small dielectric block (8) is positioned between the centers of the first rectangular dielectric waveguide (5) and a circular dielectric tray (9) and is tightly connected with the centers of the first rectangular dielectric waveguide resonant cavity and the circular dielectric tray, and a first metal screw (11) and a second metal screw (12) are respectively inserted into the first rectangular dielectric waveguide resonant cavity (3) and the second rectangular dielectric waveguide resonant cavity (4);

the circular medium tray (9) is internally provided with a circle of water circulation groove (10).

2. The integrated tunable medical microwave radiator for the local treatment of the sebaceous layer according to claim 1, characterized in that the first rectangular dielectric waveguide resonant cavity (3) and the second rectangular dielectric waveguide resonant cavity (4) respectively provide a reflection zero point, the width and length of the second rectangular dielectric waveguide (6) are used for adjusting the coupling of the first rectangular dielectric waveguide resonant cavity (3) and the second rectangular dielectric waveguide resonant cavity (4) to adjust the matching bandwidth, and the width and length of the third rectangular dielectric waveguide (7) are used for adjusting the impedance matching between the microwave radiator and the human skin layer.

3. The integrated tunable medical microwave radiator for the local treatment of the sebaceous layer according to claim 1, characterized in that the width of the dielectric small block (8) is 2/3 of the width of the second rectangular dielectric waveguide resonant cavity (4) and the first rectangular dielectric waveguide (5).

Technical Field

The invention relates to a tunable medical microwave radiator.

Background

The microwave has heat effect on the organism, so that the microwave signal with certain intensity is injected into the human body through the microwave radiator to selectively and locally heat the human body, thereby achieving the purpose of treatment.

The microwave radiator for human body treatment mainly comprises several methods of regulating the uniform distribution of a thermal field at a radiation end by loading ridge capacitors on a rectangular waveguide, filling the rectangular waveguide with ceramic powder materials for facilitating specification debugging, forming a large-volume uniform microwave field by using a reflective microwave cavity for large-area treatment and the like.

Different treatment sites and methods require different types of microwave radiators. Microwave applicators for topical treatment of the sebum layer require that the applicator be held against the skin surface to provide sufficient signal strength while preventing burning or injury from overheating the skin surface. However, the existing medical microwave radiators are mostly used for large-area treatment, and local and sebum layer treatment cannot be performed. Secondly, the existing medical microwave radiator lacks the adjusting function of matching frequency and matching degree, has narrow matching bandwidth, and does not have the skin surface layer cooling measure. The microwave radiator needs to have a certain matching bandwidth, and has a function of adjusting the working frequency and impedance matching so as to counteract the frequency deviation and matching deterioration caused by processing errors and the like.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the prior art, the integrated tunable medical microwave radiator for the local treatment of the skin lipid layer is provided, and has the functions of wider matching bandwidth, adjustment of working frequency and impedance matching and skin surface layer cooling.

The technical scheme is as follows: an integrated tunable medical microwave radiator for local treatment of a sebaceous layer comprises an SMA joint, a first rectangular dielectric waveguide resonant cavity, a second rectangular dielectric waveguide resonant cavity, a first rectangular dielectric waveguide, a second rectangular dielectric waveguide, a third rectangular dielectric waveguide, a small dielectric block, a round dielectric tray, a first metal screw and a second metal screw; wherein, all the media are made of the same material;

a metal probe of the SMA joint is inserted into the first rectangular dielectric waveguide resonant cavity, the second rectangular dielectric waveguide is positioned between the first rectangular dielectric waveguide resonant cavity and the second rectangular dielectric waveguide resonant cavity, the third rectangular dielectric waveguide is positioned between the second rectangular dielectric waveguide resonant cavity and the first rectangular dielectric waveguide, the small dielectric block is positioned between the centers of the first rectangular dielectric waveguide and the circular dielectric tray and is tightly connected with the first rectangular dielectric waveguide resonant cavity and the circular dielectric tray, and the first metal screw and the second metal screw are respectively inserted into the first rectangular dielectric waveguide resonant cavity and the second rectangular dielectric waveguide resonant cavity;

a circle of water circulation groove is arranged in the circular medium tray.

Furthermore, the first rectangular dielectric waveguide resonant cavity and the second rectangular dielectric waveguide resonant cavity respectively provide a reflection zero point, the width and length of the second rectangular dielectric waveguide resonant cavity are used for adjusting the coupling of the first rectangular dielectric waveguide resonant cavity and the second rectangular dielectric waveguide resonant cavity to adjust the matching bandwidth, and the width and length of the third rectangular dielectric waveguide resonant cavity are used for adjusting the impedance matching between the whole microwave radiator and the human skin layer.

Further, the width of the dielectric small block is 2/3 of the width of the second rectangular dielectric waveguide resonant cavity and the first rectangular dielectric waveguide.

Has the advantages that: the invention realizes the medical microwave radiator for local sebum layer treatment by the integrated design of the tunable double-rectangular dielectric waveguide resonant cavity and the dielectric tray of coaxial feed.

Drawings

FIG. 1 is a schematic cross-sectional view of an integrated tunable microwave radiator according to the present invention;

FIG. 2 is a schematic diagram of a right-view structure of the integrated tunable microwave medical radiator of the present invention;

FIG. 3 is a schematic top view of the tunable microwave radiator according to the present invention;

fig. 4 shows simulation results of the integrated tunable microwave radiator according to the present invention, wherein (a) is a set of simulation results when the tuning screw is used for adjusting the matching, and (b) is a set of simulation results when the tuning screw is used for adjusting the frequency.

Detailed Description

The invention is further explained below with reference to the drawings.

As shown in fig. 1 to 3, an integrated tunable medical microwave radiator for local treatment of sebaceous layer comprises an SMA joint 1, a first rectangular dielectric waveguide resonant cavity 3, a second rectangular dielectric waveguide resonant cavity 4, a first rectangular dielectric waveguide 5, a second rectangular dielectric waveguide 6, a third rectangular dielectric waveguide 7, a dielectric small block 8, a circular dielectric tray 9, a first metal screw 11, and a second metal screw 12; all the media are made of the same material, so that integration is facilitated.

The metal probe 2 of the SMA joint 1 is inserted into the first rectangular dielectric waveguide resonant cavity 3, the second rectangular dielectric waveguide 6 is positioned between the first rectangular dielectric waveguide resonant cavity 3 and the second rectangular dielectric waveguide resonant cavity 4, the third rectangular dielectric waveguide 7 is positioned between the second rectangular dielectric waveguide resonant cavity 4 and the first rectangular dielectric waveguide 5, the dielectric small block 8 is positioned between the centers of the first rectangular dielectric waveguide 5 and the circular dielectric tray 9 and is tightly connected with the first rectangular dielectric waveguide resonant cavity 3 and the second rectangular dielectric waveguide resonant cavity 4, and the first metal screw 11 and the second metal screw 12 are respectively inserted into the first rectangular dielectric waveguide resonant cavity 3 and the second rectangular dielectric waveguide resonant cavity 4.

The circular medium tray 9 is tightly attached to the skin surface layer corresponding to the treatment part and used for reducing microwave leakage and restricting the main electric field from entering the skin lipid layer. A circle of water circulation grooves 10 are formed in the circular medium tray 9 and are connected with external water circulation equipment through interfaces, deionized water circularly flows in the time slots in use, the skin surface layer around a treatment area can be cooled, and the skin surface layer is prevented from being overheated and damaged by large-signal microwave power.

In the invention, a high-power microwave signal is input through an SMA joint 1, and then a probe 2 feeds a first rectangular dielectric waveguide resonant cavity 3 to excite the TE of the first rectangular dielectric waveguide resonant cavity₁₀₁Mode, and then coupled to operate at TE through a second rectangular dielectric waveguide 6₁₀₁The second rectangular dielectric waveguide resonant cavity 4 of the mode is coupled to the first rectangular dielectric waveguide 5 through a third rectangular dielectric waveguide 7, and the first rectangular dielectric waveguide 5 is used as the microwave radiationOn the radiation working surface of the device, most microwave signals enter the skin surface layer of a human body through the small medium blocks 8 and the circular medium tray 9 filled with water for treatment.

In the invention, a second rectangular dielectric waveguide 6 and a third rectangular dielectric waveguide 7 are opposite to a first rectangular dielectric waveguide resonant cavity 3 and a second rectangular dielectric waveguide resonant cavity 4 and work in TE₁₀₁The first rectangular dielectric waveguide resonant cavity 3 and the second rectangular dielectric waveguide resonant cavity 4 of the mode respectively provide a reflection zero point, the width and the length of the second rectangular dielectric waveguide 6 are used for adjusting the coupling of the first rectangular dielectric waveguide resonant cavity 3 and the second rectangular dielectric waveguide resonant cavity 4 to adjust the distance between the two reflection zero points, and the width and the length of the third rectangular dielectric waveguide 7 are used for adjusting the impedance matching between the whole microwave radiator and the skin layer of the human body, namely the matching bandwidth and the impedance matching degree can be controlled.

The dielectric small block 8 can prevent water used for cooling from absorbing excessive power, so that signals can smoothly enter a treatment position, and the width of the dielectric small block 8 is preferably 2/3 of the width of the second rectangular dielectric waveguide resonant cavity 4 and the first rectangular dielectric waveguide 5. The metal screw 11 and the metal screw 12 can be combined and adjusted, and due to the inductance effect of the metal screws and the capacitance effect between the metal screws and the dielectric waveguide outer conductor, the working frequency can be effectively adjusted and matched respectively in different combination states, and the tuning flexibility is high.

The simulation results of the microwave radiator of the present invention are shown in fig. 4. Fig. 4 (a) is a set of simulation results when the tuning screw is used to adjust matching, the operating frequency covers 2.4GHz, and the matching degree of the matching curve can be adjusted in three sets of operating states. Fig. 4 (b) shows a set of simulation results when the tuning screw is used for frequency modulation, and the operating frequency can be properly adjusted in three sets of operating states.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.