Apparatus for emitting high-frequency electromagnetic waves

• US 4,197,851 A
• Filed: 01/27/1978
• Issued: 04/15/1980
• Est. Priority Date: 04/14/1977
• Status: Expired due to Term

• Current Assignee: Therafield Holdings Limited
• Original Assignee: Victor M. Fellus
• Inventors: Fellus, Victor M.
• Primary Examiner(s): Kamm, Willaim E.
• Application Number:
  US05/872,959
• Time in Patent Office: 809 Days
• Field of Search: 128/404, 128/405, 128/416, 128/421, 128/422
• US Class Current: 607/71
• CPC Class Codes: A61N 1/06 for high-frequency therapy
• CPC Class Codes: A61N 1/40 Applying electric fields by inductive or capacitive coupling microwave apparatus A61N5/00; Applying radio-frequency signals

Abstract

Apparatus for emitting high frequency electromagnetic waves comprises a low-voltage power supply, an emitter and an antenna comprising at least one conductor on a thin flexible insulating support and including a length of conductive material formed into a pattern and having interconnected ends in the region of which the conductor is connected to the output of the emitter by a single connector. This not only enables the whole antenna to be flexible so that it can be applied to areas difficult of access, e.g. parts of the human body and even be rolled into a tube for insertion in a body cavity, or wrapped around a limb, for example, but the emitter operates at a voltage of less than 50 volts, the antenna is athermic and the apparatus is significantly small. This is in contradistraction to the high voltage, bulky equipment hitherto used for therapeutic treatment of the body of a patient, both human and animal. The antenna may be associated with current-emitting electrodes and such current may be emitted alternately or simultaneously with the emission from the antenna. The emitter may be caused to emit trains of waves at frequencies between 1 HZ and 100 MHz, and the energy strength may be less than 100 MW per square centimeter.

Claims

1. Apparatus for emitting high-frequency electromagnetic waves, said apparatus comprising:

a low-voltage power supply,

a solid state circuit means for producing high-frequency, low-energy electromagnetic waves, said circuit means comprising an output which emits said high-frequency, low-energy electromagnetic waves, and an input,

means connecting said input to said power supply,

at least one antenna connected to the output of said circuit means, for producing a low energy high-frequency electromagnetic field without significant thermal effects in response to the waves produced by said circuit means,

said antenna comprising at least one conductor on a support which is formed from an electrically insulating material applicable directly on the skin of a patient'"'"'s body and formed to conform to the contour of the area of the body to which it is applied,

said at least one conductor including a length of thin conductive material in a predetermined pattern on said support to apply the electromagnetic waves to the body.

2. Apparatus according to claim 1, and further comprising current-emitting electrodes situated on an insulating face of said support, and wherein said solid state circuit means includes means for supplying low-frequency electrical pulses to said current-emitting electrodes.

3. Apparatus according to claim 2, wherein said means for producing low-frequency electrical pulses comprises a multivibrator having an input connected to said power supply and an output, and a pulse shaping stage having an input connected to the output of the multivibrator, the pulse shaping stage having an output for supplying said current-emitting electrodes and a further output, and wherein said circuit means includes a high-frequency stage having an input which is connected to said further output of said pulse shaping stage, and an output connected to said antenna.

4. Apparatus according to claim 3, wherein said pulse shaping stage includes means for connecting said multi-vibrator alternately to the two outputs of said pulse shaping stage to alternately energize said current emitting electrodes and said antennas.

5. Apparatus according to claim 3 wherein said multivibrator comprises means for generating pulses to control said high frequency stage to emit trains of said electromagnetic waves at repetition frequencies of between 1 Hz and 100 MHz.

6. Apparatus according to claim 2, wherein said antenna conductor and said electrodes are in the form of circuits printed on said support.

7. Apparatus according to claim 1 further comprising a housing within which said circuit means is situated, means detachably securing said antenna support to said housing, said housing comprising a housing sufficiently small to be placed with said antenna on the patient'"'"'s body.

8. Apparatus according to claim 1 wherein, said low voltage power supply comprises means for supplying a voltage less than 50 volts.

9. Apparatus according to claim 1 wherein said support comprises a flexible support deformable to conform to the contour of the patient'"'"'s body to which it is applied.

10. Apparatus according to claim 1 further comprising means matching said antenna to the output of said circuit means.

11. Apparatus according to claim 1, comprising a plurality of said antennas, said circuit means comprising a plurality of outputs, and for means connecting said antennas respectively to said outputs.