Microstrip spiral double-frequency heat treatment antenna

Abstract

The invention discloses a microstrip spiral double-frequency heat treatment antenna, comprising a coaxial input line, a double-arm spiral antenna, a microstrip circuit board and a water bag, wherein the double-arm spiral antenna adopts a planar spiral structure formed by two microstrips serving as spiral arms and is printed on the microstrip circuit board, the water bag is adhered to the surface of the double-arm spiral antenna in a manner of firm bonding, and water pipes are aligned inside the water bag; the double-arm spiral antenna has the spiral pitch from 0.1mm to 30mm, the number of turns from 1 to 10 and the width of microstrips from 0.1mm to 1.5mm, and satisfies the following relationship: the diameter of the double-arm spiral antenna is equal to 4 * the number of turns * (the spiral pitch + the width of microstrips). The microstrip spiral double-frequency heat treatment antenna can operate under the frequency of 915MHz and 2450MHz, has uniformity in heating and mutually supplementary heating scopes, and can avoid the damage to normal tissues caused by too high body surface temperature.

Description

technical field [0001] The invention belongs to the technical field of microwave microstrip antennas, and relates to a medical thermotherapy antenna, in particular to a hyperthermia antenna made of microstrip lines and capable of working at 2450MHZ and 915MHZ frequencies, which is suitable for in vitro hyperthermia. Background technique [0002] Microwave hyperthermia has gradually become an important technology for treating tumors. Microwave hyperthermia is divided into extracorporeal hyperthermia, internal intervention and insertion hyperthermia. Among them, external hyperthermia refers to the hyperthermia that places the thermotherapy antenna outside the body, and is mainly used to treat diseased tissues located on the surface and superficial layers of the body; interventional hyperthermia refers to the hyperthermia antenna entering the lesion through the natural cavity of the human body. Hyperthermia method; Insertion hyperthermia is a hyperthermia method in which a hype...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a microstrip helical dual-frequency hyperthermia antenna, which solves the shortcomings of the existing thermotherapy antennas, such as uneven heating and the inability to adjust the depth and shape of the heating area caused by a single operating frequency. Working at two frequencies of 915MHz and 915MHz, by reasonably controlling the heating power and heating time, the tumors with different distributions can be effectively treated step by step, and the heating is uniform, and the damage to normal biological tissues can be reduced

Images