期刊
IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION
卷 4, 期 -, 页码 484-491出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/OJAP.2023.3272570
关键词
Antenna radiation patterns; Dipole antennas; Gain; Impedance; Wideband; Phase shifters; Broadband antennas; Azimuthal current rings; electrically small antennas; Internet of Things; antenna miniaturization; printing; quasi-isotropic radiation patterns; antenna synthesis theory; wideband antennas
This paper proposes a theoretical model based on annular ring currents to synthesize quasi-isotropic antenna radiation patterns. The model shows that wideband radiation isotropy can be achieved by optimizing the combination of azimuthal currents. Spherical and cubical electrically small antenna designs with wide impedance and radiation isotropy bandwidths exceeding 10% for the GSM900 band are presented in this study.
Internet of Things (IoT) devices require orientation insensitive communication and a small footprint. Wireless communication should be maintained across the whole operation band, hence electrically small antennas (ESAs) with wideband radiation isotropy are also desired. This paper proposes a theoretical model based on annular ring currents to synthesize quasi-isotropic antenna radiation patterns. The theoretical model shows that wideband radiation isotropy can be achieved by optimizing the combination of azimuthal currents. We subsequently present spherical and cubical ESA designs that achieve measured wide impedance and radiation isotropy bandwidths exceeding 10% for the GSM900 band. The ESAs were fully printed, with substrates 3D printed and metallization applied using screen printing. Despite the electrically small sizes and low cost fully printed fabrication, the antennas achieved approximately 90% radiation efficiencies. The proposed designs are low cost because of additive manufacturing, can have embedded electronics because of their 3D structure and have the largest radiation isotropy bandwidth for an electrically small antenna in published literature.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据