Body surface communication antenna having flexible substrate

Abstract

The invention relates to a body surface communication antenna having a flexible substrate. The antenna comprises a flexible polyimide substrate and a copper paster pasted on the overall flexible polyimide substrate. The copper paster part includes a concave radiation paster, a strip-line paster and two ground-plane pasters with the same sizes; the strip-line paster and a long-horizontal-line paster arranged below the concave radiation paster forms an integrated part; the strip-line paster extends to the lower side line of the substrate; and the ground-plane pasters extend to the lower side line of the substrate and are arranged at the two sides next to the strip-line paster. A gap with the 1-mm width is formed between short-line horizontal pasters in the middle of the concave radiation paster; and gaps with the 0.15-mm widths are formed between the strip-line paster and the two ground-plane pasters at the left side and the right side. Therefore, defects that tight contact with the body skin and integration to a radio-frequency circuit can not be realized, the transmission efficiency is low, the gain performance is poor, and losses of communication along the human body surface are large can be overcome.

Description

technical field [0001] The technical solution of the invention relates to an antenna made of a conductive layer on an insulating support, in particular a body surface communication antenna with a flexible substrate. Background technique [0002] In recent years, with the development of wireless communication and Internet technology, wireless body area network technology has gradually developed. Communication systems are widely used in medical, military, aerospace and communication information. Antenna, as an indispensable device for wireless communication, becomes the key to WBAN system integration. Ordinary hard substrate antennas cannot be deformed, while flexible substrate antennas can be bent and bent to fit more closely with human skin. Therefore, it is of great significance to develop antennas based on flexible materials while ensuring the normal communication of the antenna . [0003] Within the scope retrieved by the applicant, the content disclosed in the followi...

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a body surface communication antenna with a flexible base, which uses a 50um thick flexible base polyimide flexible material as the antenna base, which has the characteristics of being bendable, so as to achieve conformal shape with the human body. The purpose is to work in the ISM 2.45GHz and 5.8GHz dual-band communication frequency bands, have a monopole radiation mode, and be able to communicate on the surface of the human body. Many defects in the radio frequency circuit, low transmission efficiency and gain, and large communication loss along the human body surface

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