A dual-polarized, ultra-broadband flexible microstrip patch antenna

Abstract

A dual-polarized, ultra-broadband flexible microstrip patch antenna belongs to the technical field of medical imaging and antennas. The antenna structure includes an arc-shaped radiation slot, two near-circular radiation patches, and a unilateral CPW feed structure, where the unilateral CPW feed structure consists of two microstrip lines and a metal floor. The arc-shaped radiation slit is etched on the metal floor, and the metal floor is printed on the upper surface of the dielectric substrate. The two near-circular patches are obtained by cutting a part of the circular patch along the circumference, and the chord length of the cut part is the same, and the two are mirror-symmetrically arranged along the 135° direction. The two circular patches are respectively connected to the microstrip line, and the microstrip line is connected to the probe to excite the antenna. Radiation patches and microstrip lines are printed on the upper surface of the dielectric substrate. The present invention implements coplanar design of two antennas with different polarizations through a unilateral CPW feeding structure, so that the low-profile antenna has dual polarization characteristics, and the isolation is greater than 15dB, and high isolation can be realized only by adjusting the antenna structure.

Description

technical field [0001] The invention belongs to the technical field of medical imaging and antennas, and relates to a dual-polarized, ultra-broadband flexible microstrip patch antenna applicable to tumor imaging and monitoring. [0002] technical background [0003] Over the years, breast tumors have developed into one of the malignant tumors that endanger the physical and mental health of women all over the world, and have replaced uterine cancer as the main cause of death in female cancer patients. In economically developed coastal areas, the incidence of breast cancer ranks first among all female malignancies. Because breast tumors are located on the body surface, the diagnosis of breast cancer is easier than other cancers such as gastric cancer and liver cancer, and there are many inspection methods. Therefore, breast cancer patients can get better results than other cancers after early diagnosis and active treatment. good therapeutic effect. [0004] With the advent of...

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Problems solved by technology

The wearable breast tumor monitoring system mainly faces the following problems: First, the space size of the system is small, and how to use the limited space to realize a high-performance antenna is the primary issue to be considered; second, in order to meet the comfort of wearing, the antenna base should be Flexible materials, therefore, the antenna performance should be robust to bending and other deformations; in addition, due to the short distance between the antenna and the human body, the human body has a greater impact on the performance of the antenna, so it is necessary to design an antenna that is less sensitive to the human body

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