Development of Wideband High-Selective Circularly Polarised Antenna Based on Filtering Quadrature Phase Feeding Network

IF 1.1 4区 计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC
Zhipeng Xia, Qing-Yuan Lu, Shangjun Jiang, Jianpeng Wang, Wen Wu, Yongxin Guo
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Abstract

This paper presents a new design of circularly polarised (CP) antenna with wideband and high gain selectivity. To achieve good circular polarisation performance, a wideband quadrature phase feeding network is initially developed with two output signals characterised by equal magnitude and consistent 90-degree phase difference. Then, to realise high gain selectivity, multi-mode resonators are introduced into the feeding network. Therefore, a specific filtering quadrature phase feeding network (FQFN) that integrates the functions of power division, frequency selectivity and phase shifting is successfully produced. Afterwards, a three-order FQFN operating at central frequency of 2.5 GHz is developed and measured for demonstration. As expected, the demonstrator has obtained wide impedance and phase bandwidths of 57.3% and 70.8%, respectively, together with two transmission zeros at about 1.25 and 3.75 GHz. Finally, a pair of crossed magneto-electric dipole antennas are implemented by adopting the proposed FQFN to achieve wideband CP radiation with high selectivity. Experimental results exhibit that the proposed scheme has achieved both impedance bandwidth of 65.3% and 3-dB axial ratio bandwidth of 62.4%, simultaneously. Moreover, attributing to the integration of the filtering function within the FQFN, performance of high gain selectivity is accomplished and ensured by three transmission zeros in gain response.

Abstract Image

基于滤波正交相位馈电网络的宽带高选择性圆极化天线的研制
提出了一种宽带高增益选择性圆极化(CP)天线的新设计。为了获得良好的圆极化性能,首先开发了一个宽带正交相位馈电网络,其两个输出信号具有相等的幅度和一致的90度相位差。然后,为了实现高增益选择性,在馈电网络中引入了多模谐振器。因此,成功地产生了一种集功率划分、频率选择性和移相功能于一体的特定滤波正交馈相网络(FQFN)。随后,研制了一种工作在2.5 GHz中心频率的三阶FQFN,并对其进行了测试。正如预期的那样,该演示器获得了57.3%和70.8%的宽阻抗和相位带宽,以及约1.25 GHz和3.75 GHz的两个传输零点。最后,采用所提出的FQFN实现了一对交叉磁电偶极子天线,实现了高选择性的宽带CP辐射。实验结果表明,该方案可同时实现65.3%的阻抗带宽和62.4%的3-dB轴比带宽。此外,由于FQFN内滤波函数的集成,增益响应中的三个传输零实现并保证了高增益选择性的性能。
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来源期刊
Iet Microwaves Antennas & Propagation
Iet Microwaves Antennas & Propagation 工程技术-电信学
CiteScore
4.30
自引率
5.90%
发文量
109
审稿时长
7 months
期刊介绍: Topics include, but are not limited to: Microwave circuits including RF, microwave and millimetre-wave amplifiers, oscillators, switches, mixers and other components implemented in monolithic, hybrid, multi-chip module and other technologies. Papers on passive components may describe transmission-line and waveguide components, including filters, multiplexers, resonators, ferrite and garnet devices. For applications, papers can describe microwave sub-systems for use in communications, radar, aerospace, instrumentation, industrial and medical applications. Microwave linear and non-linear measurement techniques. Antenna topics including designed and prototyped antennas for operation at all frequencies; multiband antennas, antenna measurement techniques and systems, antenna analysis and design, aperture antenna arrays, adaptive antennas, printed and wire antennas, microstrip, reconfigurable, conformal and integrated antennas. Computational electromagnetics and synthesis of antenna structures including phased arrays and antenna design algorithms. Radiowave propagation at all frequencies and environments. Current Special Issue. Call for papers: Metrology for 5G Technologies - https://digital-library.theiet.org/files/IET_MAP_CFP_M5GT_SI2.pdf
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