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A Planar Array Focusing Antenna Suitable for Microwave Hyperthermia

A planar array and focusing antenna technology, which is applied in the directions of antenna arrays, antennas, and electrical components that are powered separately, can solve the problem that the antenna focusing position is not tunable, and achieve the effect of low energy accumulation sidelobe and high focusing accuracy

Active Publication Date: 2017-05-03
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned types of near-field focusing antennas are based on the geometrical optics focusing principle in a homogeneous medium, which is not suitable for complicated situations such as multi-layered media or inhomogeneous media, and the antenna focusing position is not very tunable

Method used

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  • A Planar Array Focusing Antenna Suitable for Microwave Hyperthermia
  • A Planar Array Focusing Antenna Suitable for Microwave Hyperthermia
  • A Planar Array Focusing Antenna Suitable for Microwave Hyperthermia

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Embodiment 1

[0031] Based on the wireless power transmission system, in order to maximize the transmission efficiency, the transmitting energy of the transmitting antenna is focused on the position of the receiving antenna. The present invention is suitable for a planar array focusing antenna for microwave hyperthermia. The planar array focusing antenna is composed of several transmitting antenna units , each transmitting antenna unit adopts a microstrip patch antenna with a working frequency of 433MHz (-10dB bandwidth 429MHz~436MHz) and a characteristic impedance of 50 ohms. The antenna size is 90mm×134mm, and the coaxial feeding method is adopted. 6mm below the center of the antenna, the transverse spacing between the transmitting antenna elements is 0.22λ, and the vertical spacing is 0.28λ. refer to diagram 2-1 shown.

[0032] In this example, the planar array preferably has 12 antenna transmitting units arranged to form a 4*3 array, such as diagram 2-1 shown.

[0033] The control ...

Embodiment 2

[0035] Working principle and using method of the present invention:

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Abstract

The invention provides a planar array focusing antenna for microwave thermotherapy on account of the problems that most of the existing technologies are not suitable for focusing in complicated medium environments and the method for acquiring the optimal motivation of all units of a transmitting antenna is complicated. The planar array focusing antenna can be applied to the in-vitro microwave heating physiotherapy of human tumors and has the advantages of high focusing precision, low energy collection side lobe and the like. The planar array focusing antenna for microwave thermotherapy comprises a plurality of transmitting antenna units arranged in the same plane, a microstrip patch antenna with the working frequency of 433 MHz and the characteristic impedance of 50 ohms is adopted by each antenna unit, the antenna size is 90 mm*134 mm, a coaxial feeding mode is adopted, the feeding position is 6 mm below the center of the antenna, the transverse distance of each two adjacent antenna units is 0.22 lambda, and the longitudinal distance of each two adjacent antenna units is 0.28 lambda.

Description

[0001] Technical field: [0002] The invention relates to a plane focusing antenna capable of focusing through a lossy medium, and is a novel plane focusing antenna designed by optimizing the transmission efficiency of a transceiver antenna system. The planar focusing antenna has multiple selectivity and focusing accuracy according to the needs of the focusing position, and can be applied to complex human medium environments. [0003] Background technique: [0004] Microwave hyperthermia is a method of treating tumors by using the thermal effect of microwaves to heat the tumor area to the effective treatment temperature range, so as to accelerate the death of cancer cells and cause less damage to normal cells. The widely recognized goal of microwave hyperthermia is to heat the tumor area above 42 degrees while controlling the temperature of surrounding healthy tissues below 44 degrees. Microwave hyperthermia as a synergistic therapy of radiation therapy and chemical drugs has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/06H01Q23/00
Inventor 文舸一贺小平王身云
Owner NANJING UNIV OF INFORMATION SCI & TECH
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