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Device for applying a high frequency electromagnetic field to living tissue to promote healing thereof

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TLDR
A portable therapy device for attachment to a patient to promote tissue healing by exposure to an r.f. field, comprises an oscillator (5) which energizes an antenna having a transmitting element (1) the natural directive pattern of which is modified by a reflector (8) and a parasitic element (10) such that a major part of the r. f. field emitted by the antenna passes to the patient as mentioned in this paper.
Abstract
A portable therapy device for attachment to a patient to promote tissue healing by exposure to an r.f. field, comprises an oscillator (5) which energizes an antenna having a transmitting element (1) the natural directive pattern of which is modified by a reflector (8) and a parasitic element (10) such that a major part of the r.f. field emitted by the antenna passes to the patient. In another embodiment the antenna is configured to produce a spatially substantially uniform field strength over the area of the patient being treated. The device subjects the tissue to r.f. power levels which produce no significant tissue heating.

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Citations
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References
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Apparatus for emitting high-frequency electromagnetic waves

TL;DR: In this paper, the authors describe 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.
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Electrostatic shield for diathermy treatment head

TL;DR: In this article, the authors proposed a method for minimizing or preventing the deleterious skin heating effects associated with conventional short wave diathermy treatment, which includes attenuation of the electrostatic field transmitted by the applicator head and transcutaneous transmission of the radiated electromagnetic energy substantially unimpeded to the deep body tissues to be treated.
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External microwave applicator and method

TL;DR: In this article, the skin surface of a patient may be irradiated with the microwaves of a frequency of 250 to 353 MHz (i.e., a wavelength of about 85 to 120 cm).
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