Microwave apparatus for physiotherapeutic treatment of human and animal bodies

• US 4,621,642 A
• Filed: 03/14/1985
• Issued: 11/11/1986
• Est. Priority Date: 02/26/1985
• Status: Expired due to Fees

• Current Assignee: North China Research Institute of Electro-Optics An Entity of The People's Republic of China
• Original Assignee: North China Research Institute of Electro Optics
• Inventors: Chen, Zu-fan
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Shein, Mitchell J.
• Application Number:
  US06/711,847
• Time in Patent Office: 607 Days
• Field of Search: 128/422, 128/804
• US Class Current: 607/99
• CPC Class Codes: A61N 5/04 Radiators for near-field treatment

Abstract

A wide bandwidth multifrequency direct contact type microwave physiotherapeutic apparatus for replacing acupuncture therapy in medical and hygenic practice is provided. The apparatus comprises a microwave generator with a multifrequency output varying within a range of 100-3,000 MHz, and an applicator made up of an inner conductor and an outer conductor, both of which maintain direct contact with skin during treatment. The outer conductor also serves as a screening structure. The conductors are shaped to ensure a good impedance match between the applicator and the human body and to avoid microwave leakage to the environment.

Claims

1. A microwave apparatus for regulating physiological functions of human and animal bodies, comprising:

a microwave generator and a microwave applicator connected to said generator for emitting microwaves to a localized area on a body, wherein said applicator comprises inner conductor means and outer conductor means for noninvasively maintaining direct contact with the skin during treatment, said outer conductor means further serving as a screening structure.

2. The apparatus of claim 1 wherein said applicator comprises an inner conductor means formed from a metal bar connected at one end thereof to the output line of said generator, the other end thereof serving as a physiotherapeutic head, and an outer conductor means of a screening structure connected at one end thereof to the ground of said generator and opened at the other end thereof, said inner conductor means being held inside said structure of the outer conductor means.

3. The apparatus of claim 2 wherein the width of said outer conductor means increases exponentially from the end connected to said generator to the open end and has a cross section in the form of any substantially closed curve.

4. The apparatus of claim 3 wherein the cross section of said outer conductor means is circular and the width of said outer conductor means increases according to an exponential curve conforming the following equation:

space="preserve" listing-type="equation">y=ae.sup.bx

wherein

a=D₂ /2,

b=(1/L)ln(D₁ /D₂),

D₁ represents the diameter of said open end of said outer conductor means, D₂ represents the diameter of the other end of the outer conductor means, and L represents the length of said outer conductor means.

6. A microwave apparatus for regulating physiological functions of human and animal bodies, comprising:

a microwave generator, said generator comprising a plurality of oscillators of different frequencies connected in parallel, having a common output line connected to said applicator for emitting multiwaves within a frequency range of from 100 MHz to 3,000 MHz; and

a microwave applicator connected to said generator for emitting microwaves to a localized area on a body, wherein said applicator comprises inner conductor means and outer conductor means for maintaining screening structure.

5. The apparatus of claim 7 wherein both said inner conductor means and said outer conductor means have circular cross sections, and the diameter, d, of said physiotherapeutic head is within the range of from 0.1 mm to 45.0 mm and the diameter, D₁, of said open end is within the range of from 10 mm to 200 mm.

7. The apparatus of claim 6 wherein said generator further comprises:

a microstrip impedance transformer connected between said oscillators and said applicator, the width of said transformer decreasing exponentially from the end adjacent said oscillator to the end adjacent said applicator.

8. A microwave apparatus for regulating physiological functions of human and animal bodies, comprising:

a microwave generator and a microwave applicator connected to said generator for emitting microwaves to a localized area on a body, wherein said applicator comprises an inner conductor formed from a metal bar connected at one end thereof to the output line of said generator, the other end thereof serving as a physiotherapeutic head, said physiotherapeutic head being separable from and fixable to said inner conductor, and an outer conductor connected at one end thereof to the ground of said generator and opened at the other end thereof, said inner conductor being held inside the structure of the outer conductor, said outer conductor being designed such that both of said conductors maintain direct contact with the skin during treatment, said outer conductor further serving as a screening structure.

9. The apparatus of claim 8 wherein said physiotherapeutic head is connected elastically to said inner conductor and can make axial elastic movement relative to said inner conductor.

10. The apparatus of claim 8 wherein said inner conductor is of a hollow structure capable of receiving the handle of an acupuncture needle when said physiotherapeutic head is removed, and of forming a capacitive coupling with said handle during treatment while keeping said outer conductor in contact with the skin.

11. An apparatus for regulating physiological functions of a human body using localized microwave irradiation, comprising:

(a) a microwave generator comprising a plurality of oscillators connected in parallel, a microstrip impedance transformer having a width which decreases exponentially, and a metal housing serving as a screen and a heat sink, wherein the side end of said transformer is connected to the output of said oscillators;

(b) a microwave applicator which comprises an inner conductor formed from a metal bar, a screening outer conductor, and a base, wherein one end of each of said conductors is fixed on said base, said conductors being insulated from each other, the end of said inner conductor remote from said base having a detachable physiotherapeutic head and that of said outer conductor forming an open end, the width of said outer conductor increasing exponentially from said base end to said open end, said physiotherapeutic head and said open end lying in substantially the same plane; and

(c) a coaxial cable having its inner conductor connected respectively to the narrow end of said impedance transformer and to said inner conductor of said applicator, and its outer conductor connected respectively to said metal housing of said generator and said outer conductor of said applicator.