Broadband circularl-y polarized end-on-fire antenna adopting substrate integrated waveguide technology

Abstract

The invention relates to the technical field of antennas for wireless communication, in particular to a broadband circularly -polarized end-on-fire antenna adopting a substrate integrated waveguide technology, which comprises a single-layer circuit board substrate formed by sequentially stacking an upper-layer metal surface 1, a dielectric substrate 3 and a lower-layer metal bottom surface 4 from top to bottom; and the single-layer circuit board substrate is provided with two columns of metalized via holes 5 to form a substrate integrated waveguide (SIW) structure. The upper end of the substrate integrated waveguide structure is a substrate integrated waveguide port 2 used for feeding the antenna radiation unit at the rear end. And the lower port of the substrate integrated waveguide structure is an end-on-fire antenna radiation unit. The broadband circularly-polarized end-on-fire antenna is simple in structure and convenient to manufacture and integrate into a circuit, and has the advantages of being wide in axial ratio bandwidth, impedance bandwidth and half-power lobe width and the like in a working millimeter wave frequency band.

Description

technical field [0001] The invention relates to the technical field of wireless communication antennas, in particular to a broadband circularly polarized end-fire antenna using a substrate integrated waveguide (SIW) technology. Background technique [0002] In recent years, with the rapid increase in the number of mobile users, the communication system is constantly being updated and expanded, and higher and higher requirements are placed on the design of the antenna. On the one hand, the antenna is required to be wide-band and multi-frequency, so as to meet the needs of multiple systems at the same time. Communication requirements; on the other hand, it is required to achieve multi-system sharing and reduce the number of antennas to reduce interference between antennas and reduce costs. At present, the multi-frequency antenna is one of the commonly used multi-system antennas in the base station system. The core issue of multi-frequency base station antenna design is how to ...

AI Technical Summary

Problems solved by technology

However, most of the existing end-fire multi-beam dual circularly polarized antennas are double-layer dielectric plate structures, which are costly and difficult to process; secondly, most of the existing end-fire multi-beam dual circularly polarized antennas are dual-port feeders, and one port When feeding power, the other port needs to be connected to a matching load, and the specific application process is more complicated

In addition, the impedance bandwidth of the existing end-fired multi-beam dual circularly polarized antenna is 29.3%, the 3dB axial ratio bandwidth is 22.5%, and the broadband performance of the antenna is not good.

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