Abstract
In this paper, a novel design method for dual-polarized multi-resonance antennas is presented for base station applications. The radiator of the antenna is configured as cross-dipoles with four thin metal strips connected to the adjacent dipole arms. The attached strips create multiple current paths and introduce additional resonant points. As a result, the bandwidth of the antennas is broadened while maintaining a very compact size. Based on this working mechanism, two multi-resonance antennas are designed, fabricated, and tested. The antennas achieve bandwidths of 46.7% and 66.7% respectively, with excellent matching capabilities. The antennas also exhibit high port isolation levels and stable radiation performances. The promising wideband performances with compact physical sizes make the antennas highly suitable for the base station applications.
Highlights
C ELLULAR base station antennas (BSAs) are critical components in wireless mobile communication systems
We present a novel configuration of multi-resonance antennas to achieve a broad bandwidth with a very compact size
The experimental results demonstrate that the antennas have wide operating bandwidths, high port isolations, stable radiation performances, and compact sizes, being highly suitable for base station applications
Summary
C ELLULAR base station antennas (BSAs) are critical components in wireless mobile communication systems. For 3G/4G BSA elements, the industrial specifications include the ±45◦ dual-polarized radiation, wide bandwidth with good matching, high port isolation, and consistent radiation performances. SUN et al.: DUAL-POLARIZED MULTI-RESONANCE ANTENNAS WITH BROAD BANDWIDTHS AND COMPACT SIZES. Wide bandwidth with stable radiation performances have been achieved, but the antennas usually occupy a large space, which limits their applications in antenna arrays. The challenging industrial requirement of the wide bandwidth and small antenna size remains an urgent issue to be addressed for BSAs. In this paper, we present a novel configuration of multi-resonance antennas to achieve a broad bandwidth with a very compact size. The experimental results demonstrate that the antennas have wide operating bandwidths, high port isolations, stable radiation performances, and compact sizes, being highly suitable for base station applications
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