Flexible wearable ultra-wideband monopole antenna with band notch characteristic

Abstract

The invention discloses a flexible wearable ultra-wideband monopole antenna with band notch characteristic, which includes a grounding plate, a dielectric substrate, a feed network, and a radiation patch. The relative dielectric constant of the dielectric substrate is 2.3-3, the loss tangent value is 0.001, and the thickness of the dielectric substrate is 0.6-1mm. The grounding plate is arranged on one side of the dielectric substrate. The feed network and the radiation patch are arranged on the other side of the dielectric substrate. The radiation patch is composed of a semicircular structureand an inverted trapezoidal structure. A split-ring resonator is formed on the radiation patch through etching. The split-ring resonator is provided with an opening on the bottom side. The length andwidth of the split-ring resonator are respectively 5-9mm and 4-8mm, and the size of the opening is 2.5-3.5mm. The grounding plate is of the same width as the dielectric substrate, and is provided with a rectangular groove. The impedance bandwidth of the antenna is 2.7-12.3GHz. The antenna produces band notch characteristic in the frequency band of 5.1-5.9GHz. Except the frequency band, the antenna covers the working frequency band of an ultra-wideband communication system. By producing band notch characteristic in the frequency band of 5.1-5.9GHz, the interference of a narrowband system of WLAN with the ultra-wideband system is inhibited.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a flexible and wearable ultra-wideband monopole antenna with trapping characteristics. Background technique [0002] Due to the advantages of high transmission rate, strong anti-multipath fading ability, low system cost and complexity, UWB communication system is widely used in military communication, vehicle radar, digital communication and other fields. In 2002, the U.S. Federal Communications Commission allowed UWB to be used in the commercial field, and the UWB communication system working at 3.1G-10.6GHz has been vigorously developed. In recent years, the research on UWB antennas has been mainly developed towards the direction of miniaturization, broadband, compact structure, and economical and practical. As an important part of UWB communication systems, UWB antennas have become a research hotspot in recent years. More and more attention has been paid to the research on f...

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Problems solved by technology

[0003] At present, in order to effectively suppress the mutual interference between the ultra-wideband system and the wireless local area network (IEEE 802.11a WLAN, 5.15-5.825GHz), a band-stop filter can be added to the ultra-wideband system to filter out the narrow frequency band, but this not only increases the system complexity, but also increases the design cost

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