Double-zero-point notch dual-polarized antenna for WLAN

Abstract

The invention discloses a double-zero notch dual-polarized antenna for a WLAN. The antenna comprises a dielectric substrate, an upper metal layer and a lower metal layer, the upper metal layer and thelower metal layer are respectively printed on the upper surface and the lower surface of the dielectric substrate, and the upper metal layer and the lower metal layer are respectively printed with two pairs of dipole antennas in cross distribution. Coplanar waveguide notch structures are arranged in antenna arms of the dipole antennas, and the notch structures are double-U-shaped broken lines etched on upper metal layer feeder lines. The double-U-shaped broken line notch structure has the characteristic of miniaturization, an inner ring of a dipole antenna with a small area is convenient to embed, and a notch function is introduced under the condition that the size of the antenna is not increased; a double-zero trapped wave structure formed by the trapped wave structures and an opening outer ring enables the antenna to obtain a double-zero trapped wave function, the stop band is wide, and the rectangular coefficient is high; an extra filter circuit is not needed, so that the antenna is small in size and simple in structure.

Description

technical field [0001] The invention relates to the field of antenna engineering, in particular to a dual-zero notch dual-polarization antenna for WLAN. Background technique [0002] With the rapid development of wireless communication systems such as base stations and WLANs, dual-band or multi-band dual-polarized antennas are used to alleviate signal multipath fading and improve channel capacity. The stop band between two operating frequency bands is an effective method to suppress interference from other narrowband systems, such as suppressing the 3.4-3.6GHz frequency band of WiMAX and 5G communication systems. In MIMO WLAN applications, dual-band 2.4-2.484GHz and 5.15-5.85GHz dual-polarized antenna units with high isolation and high gain are crucial to achieve ideal wireless communication performance, especially for high-density working environments. [0003] H.Feng et al proposed A Dual Polarized Vivaldi Antenna with the Notched Band by Feed Line Filter on Conductive Pl...

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Problems solved by technology

[0003] H.Feng et al proposed A Dual Polarized Vivaldi Antenna with the Notched Band by Feed Line Filter on Conductive Plane in the 2018 International Conference on Microwave and MillimeterWave Technology (ICMMT), and designed a broadband with anti-jamming capability suitable for WLAN applications Dual-polarized Vivaldi antenna, but the height of the antenna is higher, reaching 50.5mm, the gain is greater than 5dBi, and the gain is lower

[0004] Y.-L.Chen et al. proposed A Novel Filter Antenna for Base Station in the 2019 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC), and designed a dual-polarized cross-dipole antenna with dual zero notches , but the antenna needs to add a matching circuit and a filter circuit under the dipole antenna, so the structure is more complicated, and the antenna bandwidth is narrow, which is not suitable for wireless local area network WLAN applications

[0005] Y. Zhang et al. proposed Dual-Polarized Band-Notched Antenna Without Extra Circuit for 2.4 / 5GHz WLAN Applications in the IEEE Access Journal in 2019, and designed a dual-polarized band-notched antenna suitable for 2.4 / 5GHz wireless LAN Antenna, but the antenna is a single zero-point notch, the stop band is small, and it cannot guarantee good suppression of all frequency bands between 3.4-3.6GHz

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