Wearable combined ultra-wide band antenna

Abstract

The invention discloses a wearable combined ultra-wide band antenna, mainly solving the problems that the conventional antenna cannot cover an ultra-wide frequency band and the radiation pattern is asymmetrical. The wearable combined ultra-wide band antenna consists of a radiating element (1), antenna dielectric (2), a floor (3) and a coaxial line (4), wherein the antenna dielectric is made of human clothes; the radiating element is vertically fixed on the surface of the clothes; the floor is symmetrically fixed at the bottom of the clothes at a position where the radiating element is vertically fixed; the radiating element and the floor are connected with an internal core and an external core of the coaxial line respectively and are used for feeding electricity; the radiating element consists of three layers of button-type metal bodies; a first layer (101) is a hollow cylinder which is provided with rectangular through holes at the bottom and symmetrical nicks on two sides; a second layer (103) is a hollow cuboid; a third layer (104) is a cylinder provided with through holes; and the coaxial line feeds electricity to the radiating element through a circular hole (301) in the center of the floor. The wearable combined ultra-wide band antenna can cover the ultra-wide frequency band and has good radiation pattern property.

Description

technical field [0001] The invention relates to the technical field of wireless communication, and relates to an antenna, in particular to a wearable combined ultra-wideband antenna. Background technique [0002] In recent years, with the continuous shrinking of the size of computers, wearable computers have developed rapidly, and wearable systems with computers as the core have begun to emerge and have shown a strong momentum of development. At present, the volume and weight of each device constituting the wearable system are getting smaller and smaller, but it has not been fully realized to be worn on the human body or clothing in the true sense. If you want to sew these devices on people's clothes in a scattered manner, and do not affect people's daily activities under the premise of normal work, you must further reduce the weight and volume of these devices. Antenna is an essential part of wireless communication. In order to reduce the size of the whole wearable system,...

AI Technical Summary

Problems solved by technology

There are currently two existing technologies, prior art 1: B.Sanz-Izquierdo et al. published an article at the 2007 Loughborough Antennas and Propagation Conference: Small Ultra-Wideband Wearable Antenna (COMPACTUWBWEARABLEANTENNA) announced an antenna with an I-shaped structure, such as Figure 1, the radiation element of the antenna is made of polytetrafluoroethylene material The disk is made by interlocking the n-shaped cylinder below with the metal chassis with the cylinder above. The antenna adopts the microstrip line side feed method for feeding, and the radiation pattern of the antenna will be affected by the The influence of the microstrip line is deformed, which makes the antenna pattern in an asymmetric distribution, which affects the performance of the antenna. At the same time, the gain of the antenna is low due to the use of polytetrafluoroethylene as a part of the radiator of the antenna.

Prior Art 2: J.M.Floc'h et al. published an article in MICROWAVEANDOPTICALTECHNOLOGYLETTERS Volume 51, No. 12 (December 2009): Research on the Radiation Characteristics of Jeans Buttons (INVESTIGATIONofRADIATINGJEANS-BUTTONANTENNAS) announced several three-layer cylindrical ladder structures antennas, as shown in Figure 2, these antennas The radiating units are all composed of cylinders with decreasing radii from top to bottom. These antennas can only work in a narrow frequency band and cannot cover ultra-wideband frequency bands. They are fed by microstrip line side feed. The antennas The radiation pattern of the antenna will be deformed by the influence of the microstrip line, and the asymmetric distribution of the antenna pattern will affect the performance of the antenna.

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