Stop band steep dual-stop band ultra wide band (UWB) antenna

A double stopband and stopband technology, applied in the directions of antenna coupling, radiating element structure, etc., can solve the problems of large antenna volume, difficult adjustment of stopband center frequency, unfavorable system integration, etc., achieving low cost, compact structure, and processing. handy effect

CN106876928AInactive Publication Date: 2017-06-20HARBIN HESON SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-06-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

A stop band steep dual-stop band UWB antenna relates to a UWB band-stop antenna of which the notch frequency band is located at the WLAN and RFID frequency bands, and is composed of a dielectric substrate (105), a radiation unit (101) on the dielectric substrate, an impedance matching input microstrip line (102), a cross-shaped electromagnetic band gap (EBG) structure (103), an EBG structure (107) shaped like a Chinese character mi and a metal grounding plate (104) under the dielectric substrate. The stop band steep dual-stop band UWB antenna of the present invention realizes the passband bandwidth required by the UWB by utilizing the radiation unit, the impedance matching input microstrip line and the metal grounding plate, utilizes the circular radiation unit with a Sierpinski triangle fractal structure to improve the stop band attenuation inhibition, and utilizes the EBG structures to realize the band stop characteristic. The stop band of the antenna involved in the present invention is nearby 5.2 GHz and 6.8 GHz, thereby avoiding the mutual interference of a WLAN system and an RFID system.
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Description

technical field

[0001] The invention relates to a UWB band stop antenna, in particular to a dual stop band UWB antenna with steep stop bands, which can suppress the mutual interference problem of a WLAN system (5.15-5.35 GHz). Background technique

[0002] In February 2002, the US Federal Communications Commission (FCC) approved the 3.1-10.6GHz frequency band for commercial communications, so UWB is widely used.

[0003] However, due to the wide frequency band covered by UWB communication, some frequency bands share frequency band resources with other wireless systems, and may interfere with other systems, such as Wimax system (3.2-3.5GHz), WLAN system (5.15-5.35GHz), ( 5.725-5.825GHz) and RFID systems (6.8GHz). How to solve co-channel interference has become an important content of UWB research, so ultra-wideband antennas with stopband characteristics have high practical value.

[0004] In recent years, there have been many design ideas for UWB bandstop antennas, such as ...

Examples

Embodiment Construction

[0023] The present invention designs a UWB antenna with double stop bands and steep stop bands, and the filter can avoid mutual interference with a WLAN system.

[0024] Below in conjunction with accompanying drawing, invention is described in more detail:

[0025] like figure 1 As shown, a dual stopband UWB antenna with steep stopbands of the present invention, the radiation unit (101) on the dielectric substrate, the impedance matching input microstrip line (102), the diamond-shaped etching fractal structure (106), and the cross Type EBG electromagnetic bandgap structure (107), cross-type EBG electromagnetic bandgap structure (103), using copper material.

[0026] An example of the present invention is figure 2 As shown, the dielectric substrate (105) is a GML1000 material with a dielectric constant of 3.2. The dielectric substrate has a thickness of 0.762mm.

[0027] The metal grounding plate (104) under the dielectric substrate is made of copper material.

[0028] li...