CN102895739B - Large-caliber series self-converging tissue lens focusing radiator - Google Patents
Large-caliber series self-converging tissue lens focusing radiator Download PDFInfo
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- CN102895739B CN102895739B CN201210435045.2A CN201210435045A CN102895739B CN 102895739 B CN102895739 B CN 102895739B CN 201210435045 A CN201210435045 A CN 201210435045A CN 102895739 B CN102895739 B CN 102895739B
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Abstract
The invention relates to a microwave radiator for microwave physical therapy of human tissues, in particular to a large-caliber series self-converging tissue lens focusing radiator and belongs to the technical field of microwave physical therapy. According to the series radiator, a pyramidal horn antenna with operating frequency of 2,450 MHz is used, and different large-caliber sizes are selected according to different application parts. The opening surface of the radiator is designed according to a lens antenna, microwaves can be converged at deep tissues by utilizing a human tissue lens which is naturally formed a high relative dielectric constant of the human tissues during clinical application, and the radiator has a certain capacity of heating the deep tissues through good heat transport and heat conduction functions of the tissues; and therefore, a clinical application range of 2,450 MHz microwave is greatly widened.
Description
Technical field
The present invention relates to a kind of microwave radiometer for tissue microwave physical therapy, especially relate to a kind of heavy caliber series auto-convergence and organize lens focus irradiator, belong to microwave physical therapeutic technic field.
Background technology
At present in microwave physical therapeutic technic field, for the microwave therapy apparatus of tissue microwave physical therapy, usually select 2450MHz, 915MHz, 433MHz tri-kinds of operating frequencies.Its physical penetration degree of depth is respectively 1.7cm, 3cm, 3.6cm, and in therapeutic process, fatty overheated tendency raises successively.Although 915MHz, 433MHz depth of microwave penetration is comparatively dark, due to microwave source costly, price of complete machine is higher, is generally used for microwave heat therapeutic, and for during physical therapy, then cost is too high, patient not easily accepts.And 2450MHz microwave source is cheap, Clinical practice is comparatively extensive, but due to penetration depth shallow, and mostly be doublet radiator and a small amount of associated microstrip radiating element, bore is less than normal, and clinical practice is greatly limited.Compare with waveguide radiator, the heterogeneity phantom of dipole and associated microstrip radiating element is uneven, easily forms heat spot; Ll vertical electric field component is comparatively large, increases fatty overheated tendency; Due to generation is not plane wave, reduce further heat penetration.Therefore 2450MHz microwave is made can only to carry out the physical therapy of superficial tissue among a small circle.
Summary of the invention
The object of the invention is for overcoming above-mentioned the deficiencies in the prior art part, providing a kind of heavy caliber series auto-convergence to organize lens focus irradiator.This series radiation device adopts operating frequency to be the pyramidal horn antenna of 2450MHz, according to the difference of application site, selects different heavy caliber sizes.Lens antenna design is pressed at irradiator actinal surface place, utilizes the tissue lens of the high relative dielectric constant institute self-assembling formation of tissue, make microwave energy converge at tissue depth during clinical practice.Owing to have employed heavy caliber pyramidal horn antenna, heterogeneity phantom is comparatively even, and the TE10 ripple longitudinal electric field component of transmission is less, and fat ratio of being heated is less; Organize lens owing to have employed, improve the physical penetration degree of depth of microwave; Owing to have employed heavy caliber design, under the restrictive condition of Same Efficieney density, larger output can be adopted, therefore by highly organized heat conveying, conduction of heat, certain heating efficiency can be had to deep tissue, thus greatly extend the clinical scope of application of 2450MHz microwave.
The present invention realizes with following technical scheme: a kind of heavy caliber series auto-convergence organizes lens focus irradiator, this irradiator comprises coaxial waveguide converter, it is characterized in that: described coaxial waveguide converter is connected with heavy caliber pyramidal horn antenna, the other end of heavy caliber pyramidal horn antenna is for organizing collecting lens.
Described heavy caliber pyramidal horn antenna comprises the pyramidal horn antenna of different bore.
Describedly organizing collecting lens, for utilizing the tissue lens of the high relative dielectric constant institute self-assembling formation of tissue, making microwave energy converge at tissue depth.
Advantage of the present invention is: this series radiation device adopts operating frequency to be the pyramidal horn antenna of 2450MHz, according to the difference of application site, select different heavy caliber sizes, heterogeneity phantom is comparatively even, the TE10 ripple longitudinal electric field component of transmission is less, and fat ratio of being heated is less; Lens antenna design is pressed at irradiator actinal surface place, the tissue lens of the high relative dielectric constant institute self-assembling formation of tissue are utilized during clinical practice, microwave energy is made to converge at tissue depth, under the restrictive condition of Same Efficieney density, larger output can be adopted, therefore by highly organized heat conveying, conduction of heat, certain heating efficiency can be had to deep tissue, thus greatly extend the clinical scope of application of 2450MHz microwave.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Fig. 1 is structural representation of the present invention;
In figure: 1, coaxial waveguide converter, 2, heavy caliber pyramidal horn antenna, 3, organize collecting lens, 4, tissue.
Detailed description of the invention
As shown in the figure: a kind of heavy caliber series auto-convergence organizes lens focus irradiator, this irradiator comprises coaxial waveguide converter 1, described coaxial waveguide converter is connected with heavy caliber pyramidal horn antenna 2, and the other end of heavy caliber pyramidal horn antenna is for organizing collecting lens 3.
Described heavy caliber pyramidal horn antenna comprises the pyramidal horn antenna of different bore.
Describedly organizing collecting lens, for utilizing the tissue lens of the high relative dielectric constant institute self-assembling formation of tissue, making microwave energy converge at tissue depth.
Its operation principle: coaxial waveguide converter: in order to ensure main mould TE
10the transmission of ripple, suppresses the transmission of higher mode simultaneously, and label taking quasi-retangular wave is led broadside and is of a size of a=0.65 λ, narrow limit size b=a/2.
Adopt metal probe by coaxial line Energy Coupling in waveguide.Because probe diameter has influence on impedance, frequency range and load power, therefore select d=0.04 λ ~ 0.08 λ.
The degree of depth of probe in waveguide will affect radiant power and radiation resistance, get h ≈ 0.25 λ.
Probe and waveguide bonnet distance affect phase place between echo and incidence wave and radiant power and reactance, get 0.25 λ g > L > 0.167 λ g.
Heavy caliber pyramidal horn antenna:
Except having conventional horn antenna function, heavy caliber pyramidal horn antenna, as the feed organizing collecting lens, form quasi-parallel plane wave, and therefore beam angle should be wide as far as possible, and gain should be large as far as possible.
Get broadside A=17cm, according to best pyramid horn designs, try to achieve narrow limit b ≈ 12.3cm, expection gain G ≈ 9.5dB, half-power beam width 2 θ
0.5H=58.7 °, 2 θ
0.5E=57.1 °.
If get broadside A=33cm, then narrow limit B ≈ 25.5cm, expection gain G ≈ 15.56dB, half-power beam width 2 θ
0.5H=29.2 °, 2 θ
0.5E=26.1 °.
Therefore heavy caliber series span can be: broadside A=17cm ~ 33cm, narrow limit B=12.3cm ~ 25.5cm.Expection gain variation range: G=9.5dB ~ 15.56dB.
Half-power beam width 2 θ
0.5H: 58.7 ° ~ 29.2 °, 2 θ
0.5E: 57.1 ° ~ 26.1 °.
Organize collecting lens:
The quasi-parallel plane wave organizing collecting lens to be produced by pyramidal horn antenna by with the tissue of irradiator female side openings surface contact after in organizing, form convergent wave.For 2450MHz frequency, the relative dielectric constant of human muscular tissue is 47, coefficient of refraction n=6.856.According to the condition of Fermat's principle equivalent optical path, selected corresponding focal length value, can try to achieve the surface curvature of concave lens.In engineering for simplicity, directly can select circular curve surface according to the focal length of lens, error also within the acceptable range.
Claims (2)
1. a heavy caliber series auto-convergence organizes lens focus irradiator, this irradiator comprises coaxial waveguide converter (1), it is characterized in that: described coaxial waveguide converter is connected with heavy caliber pyramidal horn antenna (2), the other end of heavy caliber pyramidal horn antenna is for organizing collecting lens (3); Described collecting lens of organizing, for utilizing the tissue lens of the high relative dielectric constant institute self-assembling formation of tissue, makes microwave energy converge at tissue depth; This irradiator adopt operating frequency be the pyramidal horn antenna of 2450MHz, the quasi-parallel plane wave organizing collecting lens to be produced by pyramidal horn antenna by with the tissue of irradiator female side openings surface contact after in organizing, form convergent wave.
2. heavy caliber series auto-convergence according to claim 1 organizes lens focus irradiator, it is characterized in that: described heavy caliber pyramidal horn antenna comprises the pyramidal horn antenna of different bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210435045.2A CN102895739B (en) | 2012-11-02 | 2012-11-02 | Large-caliber series self-converging tissue lens focusing radiator |
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| CN201210435045.2A CN102895739B (en) | 2012-11-02 | 2012-11-02 | Large-caliber series self-converging tissue lens focusing radiator |
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| Publication Number | Publication Date |
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| CN102895739A CN102895739A (en) | 2013-01-30 |
| CN102895739B true CN102895739B (en) | 2015-05-27 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466428B (en) * | 2014-11-27 | 2017-11-03 | 北京环境特性研究所 | A kind of lighting reduced-size antenna for near-field test |
| CN104606791B (en) * | 2015-01-07 | 2017-01-25 | 深圳恩鹏健康产业股份有限公司 | Physical therapy device |
| CN107035316A (en) * | 2017-05-26 | 2017-08-11 | 东北大学 | A kind of rock surface fracturing microwave focusing radiator |
| CN111921094A (en) * | 2020-08-13 | 2020-11-13 | 西安量极医疗设备有限公司 | Microwave physiotherapy radiator with rectangular cavity |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841989A (en) * | 1985-06-29 | 1989-06-27 | Tokyo Keiki Co., Ltd. | Applicator for use in hyperthermia |
| CN1164430A (en) * | 1997-01-31 | 1997-11-12 | 上海第二医科大学附属仁济医院 | Hearing recovery instrument with pulse microwave apparatus |
| CN2402343Y (en) * | 2000-01-25 | 2000-10-25 | 张富鑫 | Magneto-optic millimeter wave radiation head |
| CN201586331U (en) * | 2009-07-10 | 2010-09-22 | 徐州市诺万医疗设备有限公司 | 433 MHZ microwave radiator based on ridge capacitor loading |
| CN202876111U (en) * | 2012-11-02 | 2013-04-17 | 徐州市诺万医疗设备有限公司 | Large-caliber series auto-convergence tissue lens focusing radiator |
-
2012
- 2012-11-02 CN CN201210435045.2A patent/CN102895739B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841989A (en) * | 1985-06-29 | 1989-06-27 | Tokyo Keiki Co., Ltd. | Applicator for use in hyperthermia |
| CN1164430A (en) * | 1997-01-31 | 1997-11-12 | 上海第二医科大学附属仁济医院 | Hearing recovery instrument with pulse microwave apparatus |
| CN2402343Y (en) * | 2000-01-25 | 2000-10-25 | 张富鑫 | Magneto-optic millimeter wave radiation head |
| CN201586331U (en) * | 2009-07-10 | 2010-09-22 | 徐州市诺万医疗设备有限公司 | 433 MHZ microwave radiator based on ridge capacitor loading |
| CN202876111U (en) * | 2012-11-02 | 2013-04-17 | 徐州市诺万医疗设备有限公司 | Large-caliber series auto-convergence tissue lens focusing radiator |
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