Single-trapped-wave ultra-wide-band monopole antenna

Abstract

The invention discloses a single-trapped-wave ultra-wide-band monopole antenna which comprises a dielectric substrate. A grounding plate is arranged on the lower surface of the dielectric substrate, a radiation patch and a micro-strip feeder line connected with the radiation patch are arranged on the upper surface of the dielectric substrate, and the micro-strip feeder line is etched with a band-elimination resonance unit. The lower portion of the radiation patch is provided with a through hole penetrating through the radiation patch. The micro-strip feeder line of the single-trapped-wave ultra-wide-band monopole antenna is etched with a band-elimination resonance unit, has good trapped-wave properties and can effectively inhibit mutual interference between an ultra-wide band system and a WLAN system, and worsening of radiation characteristics of the antenna due to a mode of etching and grooving on the radiation patch is avoided. The band-elimination resonance unit is simple in structure, compact, small and exquisite and convenient to ingrate, the size of the whole antenna is not additionally increased, and antenna miniaturization can be achieved. The antenna has the advantages of being wide in bandwidth, small in size, low in cost and easy to process and has a good directional diagram in a whole frequency band range.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a single-notch ultra-wideband monopole antenna. Background technique [0002] Ultra-Wide Band (UWB, Ultra-Wide Band) technology is a new type of wireless communication technology. According to the regulations of the Federal Communications Commission (FCC, Federal Communications Commission), the frequency band of UWB communication is 3.1GHz to 10.6GHz. However, this frequency range with a bandwidth of 7.5 GHz includes the current operating frequencies of wireless local area networks (WLAN) 5.2 GHz (5.15 GHz to 5.35 GHz) and 5.8 GHz (5.725 GHz to 5.825 GHz). In order to avoid the interference of signals in these frequency bands, the ultra-wideband antenna needs to be blocked in the frequency band in the range of 5 GHz to 6 GHz, that is, it has a notch (band rejection) characteristic. In addition, the current communication system tends to be miniaturized and highly int...

AI Technical Summary

Problems solved by technology

The disadvantage of this design is that slotting in the radiation part of the antenna will cause the generation of high-order modes, so that the antenna pattern (the graphical representation of the antenna direction function is the pattern of the antenna) is distorted in the high frequency band; at the same time, the surface current is changed The flow path of the antenna also increases the cross-polarization of the antenna, which deteriorates the pattern; (2) carry out band-stop filter design on the feeder, such as the Chinese patent application No. Notch antenna, which utilizes the EBG (Electromagnetic Band-gap) structure symmetrically distributed on both sides of the impedance-matched input microstrip line to achieve band-stop characteristics

The advantage of this method is that the designed band stop structure can be directly embedded into the microstrip line (feeder line), and better band trap performance can be achieved without optimizing other structures; the disadvantage is that the EBG structure additionally adds The size of the antenna is reduced, which is not conducive to miniaturization, and the complex structure puts forward higher requirements for processing

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