CN100479884C - Multi-arm spiral heat therapy microwave antenna - Google Patents
Multi-arm spiral heat therapy microwave antenna Download PDFInfo
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- CN100479884C CN100479884C CNB2006100418728A CN200610041872A CN100479884C CN 100479884 C CN100479884 C CN 100479884C CN B2006100418728 A CNB2006100418728 A CN B2006100418728A CN 200610041872 A CN200610041872 A CN 200610041872A CN 100479884 C CN100479884 C CN 100479884C
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- arm spiral
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- coaxial cable
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Abstract
The multi-arm spiral heat therapy microwave antenna includes a microwave source, a power divider, a phase shifter and multi-arm spiral antenna with feeding terminal and back cavity connected together through coaxial cables. The feeding terminal applies excitations of different phases or different frequencies to the rotating arms and this alters the energy distribution and the heating field of the antenna or makes the target heated homogeneously.
Description
Technical field
The present invention relates to a kind of medical thermotherapy coaxial cable microwave antenna, particularly a kind of multi-arm spiral microwave antenna.
Background technology
The microwave heat therapeutic technology has arrived application in the clinical treatment of a lot of diseases, coagulate solidifying of hemostasis and paraplasm tissue etc. as thermotherapy, the heat of tumor.Microwave heat therapeutic often is divided into external thermotherapy and vivo inserted or insertion thermotherapy.External thermotherapy is meant that antenna for radiating microwave is positioned at the thermotherapy of health outside, be mainly used in and treat the pathological tissues that is positioned at health top layer and shallow top layer, its antenna pattern and size are not subjected to the restriction of organization of human body, can select the antenna of various structures such as open ended waveguide, microstrip antenna, dipole and helical antenna.To being positioned at the pathological tissues in health deep, the normal method that adopts intervention or insert makes antenna go deep into lesions position pathological tissues is heated to treat.Intervention is meant that antenna enters lesions position by the natural cavity of human body, and insertion is to make antenna enter lesions position by modus operandi.
The design core of microwave heat therapeutic system is the design of antenna for thermotherapy, and the antenna of using in microwave band mainly contains at present: open ended waveguide, flat helical antenna, microstrip antenna and various dipole radiation antenna with coaxial feeding.Open ended waveguide is an antenna for radiating microwave commonly used in the external treatment, waveguide directly can be aimed at therapentic part and shine, because the size and the weight of radiating guide are all bigger, installs and move all inconvenience in clinical practice.It is little, in light weight, easily and advantage such as the human body maintenance is conformal and irradiated area is big that microstrip antenna and the antenna array of being made up of microstrip antenna have a volume, this class can there be certain difficulty in treatment to deep tissues with the conformal little band in surface or helical antenna, and the subject matter that exists in large area treatment in addition is the measurement of tissue surface real time temperature.The annular phased array is a kind of antenna of external deep layer tumor thermotherapy, is looped around the outer dipole antenna of human body by one group and forms, and makes electromagnetic energy meet the requirements on spatial distribution by excitation phase and the amplitude of controlling different antennae.The subject matter that this antenna exists is easily the deep normal structure to be caused damage.In the external thermotherapy,, need between antenna and tissue, place water bag in the treatment, can realize the tissue surface temperature controlling by adjusting the temperature and the flow velocity of water in the water bag in order to reduce the hot injury of surface texture.The position of some tumor is in the cavity, as the prostate of the uterus of the stomach of gastrointestinal system, rectum etc., gynecological, Gong Jing etc., urinary system, wing skin etc., the trachea and bronchus of respiratory system etc.For the tumor of these tissues, can adopt undamaged mode to insert (promptly getting involved) treatment antenna, make electromagnetic energy direct heating pathological tissues, efficiency of heating surface height, heated perimeter is controlled easily, has reduced the damage to normal structure.Deep tissues tumor for non-cavity position, though can heat by external irradiator, but the decay and to normal tissue injury all very serious of energy between tissue, and the temperature of interior tissue also is difficult to control often in this case adopts the method that diminishes implantation to carry out thermotherapy.Get involved and diminish implantation microwave heat therapeutic commonly used 915 and two kinds of operating frequencies of 2450MHz, according to the position of body cavity and focal zone and the difform antenna of different designs of size, get involved or be implanted to cavity or organization internal heats tumor by the medical latex conduit, the method easily and effectively, and is and little to normal tissue injury.Getting involved and implanting antenna commonly used in the microwave heat therapeutic is various dipole antennas, the basic structure of this antenna after Taylor in 1972 proposes first since its have radiation efficiency height, volume little, advantage such as get involved and implant conveniently and be used widely.The helical antenna of microwave heat therapeutic generally all is single armed helical antenna or both arms helical antenna.In a single day complete its distribution of emittance of present these antenna is also just fixing thereupon, is difficult to accomplish even heating.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of plane spiral microwave antenna for thermotherapy that only by the relative phase realization of regulating each arm feed of antenna the different parts timesharing is heated under the situation that does not change antenna structure and position is provided.
For achieving the above object, the technical solution used in the present invention is: comprise microwave source and the power splitter that is used to handle microwave that is connected with the outfan of microwave source by coaxial cable, be characterized in, the outfan of this power splitter is connected by the input of coaxial cable with the phase shifter that is used to regulate microwave, the inner wire of the coaxial cable of the outfan of this phase shifter is connected with the feed end of Multi-arm spiral antenna, and the outer conductor of coaxial cable is connected with the back of the body chamber of Multi-arm spiral antenna.
Multi-arm spiral antenna of the present invention is two arms or the above helical antenna of two arms, and this helical antenna is made by conducting metal or printed circuit, and feed end is arranged on the spiral center; The radius in back of the body chamber is 15mm-100mm, and evenly offers the through hole that equates with the arm number of Multi-arm spiral antenna on back of the body chamber.
The present invention adds the excitation of out of phase or different frequency to spiral arm at feed end, the Energy distribution that makes antenna is along with the phase place of antenna excitation or frequency shift and change, can make the intentional change in heating field of antenna like this, also can be periodic each phase place and the frequency change of control antenna excitation, make the target even heating.
Description of drawings
Fig. 1 is an overall structure sketch map of the present invention;
Fig. 2 is the structural representation that the present invention carries on the back chamber 5;
Fig. 3 is the structural representation of Multi-arm spiral antenna 6 of the present invention;
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1, the power splitter 3 that the present invention includes microwave source 1 and be connected with the outfan of microwave source 1 by coaxial cable 2, the outfan of power splitter 2 is connected by the input of coaxial cable 2 with the phase shifter 4, the inner wire of the coaxial cable 2 of the outfan of phase shifter 4 is connected with the feed end of Multi-arm spiral antenna 6, the outer conductor of coaxial cable 2 is connected with the back of the body chamber 5 of Multi-arm spiral antenna 6, Multi-arm spiral antenna 6 of the present invention can be that the above logarithmic helical antenna of two arms or two arms is formed, the number of turns and the distance between the spiral of spiral can be decided according to practical situation, by coaxial cable in spiral apex drive.
Referring to Fig. 2, the back of the body of the present invention chamber 5 is 15mm-100mm for its radius of network structure, and evenly offers the through hole 7 that equates with the arm number of Multi-arm spiral antenna 6 on back of the body chamber 5.
Referring to Fig. 3, the present invention adopts standard or non-standard coaxial cable feed mode, the arm number of spiral can be that two arms and two arms are above (as 4,5,6 etc.), with the four-arm spiral antenna with netted back of the body chamber is example, power splitter 3 will by coaxial cable 2 from microwave source 1 transmit microwave branch success rate equate, four road microwaves that phase place is identical, phase place by phase shifter 4 each road microwave of adjusting, each road microwave is transferred to helical antenna 6 by coaxial cable 2, and the inner wire of four road coaxial cables 2 connects the feed end of helical antenna 6 respectively, and outer conductor connects back of the body chamber 5 respectively, by regulating four tunnel phase places electric current on the helical antenna 6 is changed, thereby cause the variation of directional diagram.
Claims (3)
1, a kind of multi-arm spiral heat therapy microwave antenna, comprise microwave source (1) and the power splitter that is used to handle microwave (3) that is connected with the outfan of microwave source (1) by coaxial cable (2), it is characterized in that: the outfan of this power splitter (3) is connected by the input of coaxial cable (2) with the phase shifter that is used to regulate microwave (4), the inner wire of the coaxial cable (2) of the outfan of this phase shifter (4) is connected with the feed end of Multi-arm spiral antenna (6), and the outer conductor of coaxial cable (2) is connected with the back of the body chamber (5) of Multi-arm spiral antenna (6).
2, multi-arm spiral heat therapy microwave antenna according to claim 1, it is characterized in that: said Multi-arm spiral antenna (6) is two arms or the above helical antenna of two arms, this helical antenna (6) is made by conducting metal or printed circuit, and feed end is arranged on the spiral center.
3, multi-arm spiral heat therapy microwave antenna according to claim 1 is characterized in that: said back of the body chamber (5) radius is 15mm-100mm, and evenly offers the through hole (7) that equates with the arm number of Multi-arm spiral antenna (6) on back of the body chamber (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100418728A CN100479884C (en) | 2006-03-02 | 2006-03-02 | Multi-arm spiral heat therapy microwave antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100418728A CN100479884C (en) | 2006-03-02 | 2006-03-02 | Multi-arm spiral heat therapy microwave antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1810321A CN1810321A (en) | 2006-08-02 |
| CN100479884C true CN100479884C (en) | 2009-04-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100418728A Expired - Fee Related CN100479884C (en) | 2006-03-02 | 2006-03-02 | Multi-arm spiral heat therapy microwave antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100479884C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008151469A1 (en) * | 2007-06-15 | 2008-12-18 | Changxue Ren | Heating device and method using a pseudo-uniform electromagnetic field |
| CN101987037B (en) * | 2010-11-04 | 2012-04-04 | 西安理工大学 | Microstrip spiral double-frequency heat treatment antenna |
| CN105970789B (en) * | 2016-06-01 | 2018-10-23 | 西安电子科技大学 | A kind of microwave heating equipment dividing radiation integrated based on work( |
| CN109546319B (en) * | 2018-11-13 | 2022-03-15 | 电子科技大学 | Electromagnetic vortex generator based on multi-arm spiral structure |
| CN112618961A (en) * | 2020-12-31 | 2021-04-09 | 大连奥瑞科技有限公司 | Phase-shifting type microwave treatment system |
-
2006
- 2006-03-02 CN CNB2006100418728A patent/CN100479884C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1810321A (en) | 2006-08-02 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090422 Termination date: 20120302 |