JP2006173069A - Microwave or electromagnetic wave irradiation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of power not effectively reaching an irradiated object due to a microwave or an electromagnetic wave not being concentrated on the irradiated object in same phase and same polarized wave in the microwave or the electromagnetic wave irradiation apparatus. <P>SOLUTION: The microwave or the electromagnetic wave radiated from a linear antenna 6 fixed to one focal line of an elliptic cylinder is reflected on an elliptic cylinder wall of a conductor and irradiated in concentration in the same phase and the same polarized wave on the irradiated object positioned on the other focal line of the elliptic cylinder. The irradiated object has a mechanism which can remain still inside or else pass through a tube of a glass or other non-conductive material. As the result, the effect of the microwave or the electromagnetic irradiation can be improved and power can be effectively used. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a microwave or electromagnetic wave irradiation apparatus used for plasma generation, chemical reaction, or heating of a substance.

  A conventional microwave or electromagnetic wave irradiation apparatus irradiates a microwave or electromagnetic wave toward an object to be irradiated over a wide range without managing the phase or polarization direction, as in the example of the microwave oven shown in FIG. Is.

  However, according to the above technique, the emitted microwaves or electromagnetic waves do not reach the irradiated object in a concentrated manner in the same phase. For example, microwaves or electromagnetic waves reflected by different paths in the apparatus may reach the object to be irradiated with an opposite phase and rather weaken. As a result, the power of the microwave or electromagnetic wave in the irradiated object is reduced. Further, since the direction of polarization in the irradiated object is not managed, the microwave or electromagnetic wave may not be efficiently absorbed depending on the shape and direction of the irradiated object.

As a result, in order to obtain a predetermined irradiation effect, it is necessary to radiate a higher-power microwave or electromagnetic wave, which is not preferable for effective use of power. Therefore, the present invention concentrates the microwave or electromagnetic wave radiated from the antenna in the same phase with respect to the irradiated object and aligns the direction of the polarization, so that the electric power effectively reaches the irradiated object. It is an object to provide an irradiation apparatus.

  In order to solve the above-mentioned problems, a first invention includes a metal or conductive material body having an elliptic cylinder cavity, and a microwave or electromagnetic radiation antenna fixed at one focal line of the elliptic cylinder. And a mechanism for allowing the irradiated object to stand still or pass through at the position of the other focal line of the elliptical column, and to irradiate the irradiated object with the microwave or electromagnetic wave in the same phase in a concentrated manner. .

  Moreover, 2nd invention is a linear antenna fixed so that it might correspond to one focal line of the said elliptic cylinder as a radiation antenna in 1st invention.

  In addition, the third invention is a glass or non-conductive material disposed on the other focal line of the elliptical column as a mechanism for stationary or passing the irradiated object in the first invention or the second invention. It is characterized by being a sex tube.

  According to the first invention, the microwave or electromagnetic wave radiated from the antenna fixed at the position of the focal line of the elliptic cylinder is reflected by the wall of the elliptic cylinder, and is placed at the position of the other focal line of the elliptic cylinder. This has the effect of concentrating on the irradiated object in the same phase. In general, when microwaves or electromagnetic waves radiated from one focal line of an elliptical cylinder are reflected by the elliptical cylinder wall, it is known that the other focal line of the elliptical cylinder concentrates in the same phase. Yes. Metals or conductive materials are known to reflect microwaves or electromagnetic waves.

  According to the second invention, by using the linear antenna as the radiation antenna, the microwave or electromagnetic wave dispersed toward the bottom surface of the elliptic cylinder is suppressed, and the concentration of the microwave or electromagnetic wave on the irradiated object is further increased. effective. For example, a linear antenna adjusted with a length of about ¼ wavelength in principle does not radiate electromagnetic waves in the length direction of the antenna, but radiates maximum power in a plane perpendicular to the length direction. It is known.

Further, it is known that a linear antenna radiates linearly polarized waves having an electric field component parallel to its length direction. Further, since the linear antenna is elongated and has a small cross-sectional area, it can be arranged so as to overlap the focal line of the elliptical cylinder.

  According to the third invention, the irradiated object can be easily disposed at a location where microwaves or electromagnetic waves are concentrated, and an irregular shaped object such as a liquid, a gas, or a solid can be formed inside the tube. It can be irradiated with microwaves or electromagnetic waves while still or passing.

  One embodiment of the present invention is shown in FIG. The main body 1 is made of metal and has a structure having an elliptical columnar cavity. One elliptical line of this elliptical column is 2, and the other focal line of this elliptical column is 3. The upper lid 4 and the bottom lid 5 are metal flat plates and are attached in close contact with the main body.

A hole is made in the upper lid 4 at a position intersecting with the focal line 2, and a linear antenna 6 having a wavelength of about ¼ wavelength is attached to the focal line 2 in the cavity. The connector 7 is attached to the outside of the cavity, passes through the upper lid 4 and is coupled to the linear antenna. A hole is made at a location where the upper lid 4 and the focal line 3 intersect, and a glass test tube 8 is inserted into the focal line 3 through the upper lid 4. An irradiated object 9 can be placed in the test tube 8.

"Effect of embodiment"
According to this embodiment, the microwave or electromagnetic wave fed from the connector 7 is radiated from the linear antenna 6 into the cavity, reflected 10 by the elliptical column wall of the main body 1, and transmitted through the glass test tube 8. Thus, it reaches the irradiated object 9 in the same phase. Further, microwaves or electromagnetic waves that are incident on the upper lid 4 or the bottom lid 5 without being incident on the elliptical column wall become irregular reflection components. However, as shown in FIG. 2, the microwave or electromagnetic wave that becomes the irregular reflection component is suppressed by the directivity 12 of the linear antenna.

Further, due to the polarization characteristics of the linear antenna, linearly polarized light having the electric field component 13 is radiated in the length direction of the antenna, reflected by the elliptical column wall, and reaches the irradiated object with the same polarization direction. If the object to be irradiated is arranged in advance in an appropriate direction according to the polarization direction, it is possible to improve the absorption efficiency of the microwave or electromagnetic wave to the object to be irradiated.

"Other embodiments"
In the embodiment of FIG. 1, the glass test tube penetrates only the upper lid 4. However, in another embodiment, the glass tube may penetrate the bottom lid 5, and the continuous through the upper lid 4 and the bottom lid 5. A simple tube may be used. The material of the tube may be other than glass. Further, in the embodiment of FIG. 1, the shapes of the upper lid 4 and the bottom lid 5 are flat surfaces, but may be curved surfaces in other embodiments. In addition, the major axis and the focal length of the elliptic cylinder are adjusted so that the reflected wave 10 on the elliptic cylinder wall and the direct wave 11 reach the irradiated object in the same phase, and the microwave or The phases of the electromagnetic waves may be aligned.

It is a figure which shows one Embodiment of this invention. It is a figure which shows the directivity of a linear antenna, and the direction of a polarized wave. It is a figure which shows a part of microwave oven as a figure which shows a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 One focal line of an elliptical column 3 The other focal line of an elliptical column 4 Top lid 5 Bottom lid 6 Linear antenna 7 Connector 8 Glass test tube 9 Irradiated object 10 Reflected by an elliptical column wall and irradiated Example of Microwave or Electromagnetic Wave Path to Reach 11 Microwave or Electromagnetic Wave Path to Directly Irradiate from Radiation Antenna 12 Schematic Diagram of Radiation Directivity of Linear Antenna 13 Linearly Polarized Wave Radiated from Linear Antenna Direction of electric field 14 Metal housing 15 Waveguide or antenna 16 Dish 17 on which an object is placed 17 Object 18 An example of a microwave path radiated and reflected in the case

Claims (3)

A metal or conductive material body with an elliptical column cavity, a microwave or electromagnetic radiation antenna fixed to one focal line of the elliptical column, and the other focal line of the elliptical column An apparatus for irradiating microwaves or electromagnetic waves, characterized by comprising a mechanism for stationary or passing an object to be irradiated, so that microwaves or electromagnetic waves can be concentratedly irradiated on the object to be irradiated in the same phase. 2. The microwave or electromagnetic wave irradiation apparatus according to claim 1, wherein the radiation antenna is a linear antenna fixed so as to coincide with one focal line of the elliptic cylinder. The mechanism for allowing the object to be irradiated to rest or pass is a glass or a non-conductive tube disposed on the focal line of the elliptical cylinder on the other side of the antenna. The microwave or electromagnetic wave irradiation apparatus according to 2.

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