NDLI: Broadband CP crossed-stepped-dipole antenna incorporating a cross slotted square patch

Content Provider	IET Digital Library
Author	Feng, Guirong Chen, Lei Xue, Xingsi Li, Na Shi, Xiaowei
Abstract	A simple broadband circularly polarised (CP) crossed-dipole antenna is proposed. The antenna is composed of two crossed-strip dipoles with two stepped sections, which are connected by vacant-quarter rings to realise CP radiation, and a parasitic cross-slotted square patch (CSSP) consisting of a modified square-ring patch and a cross-slot, which surrounds the crossed dipoles. By controlling the width ratio of the two strip sections, the stepped dipole can provide proper amplitude between two orthogonal modes to achieve wide axial ratio (AR) bandwidth. The CSSP can generate two minimum AR points simultaneously: one point is from the ring-patch mode, while the other is generated based on the mode from the combination of the crossed dipole and the cross-slot, which can be equivalent to a magneto-electric dipole. An antenna prototype is fabricated and measured for design verification. The experimental results show that the proposed antenna with its simple structure has a wide −10 dB impedance bandwidth of more than 80% (3.38–7.97 GHz) and a 3 dB AR bandwidth of 59.1% (4.17–7.67 GHz). The proposed antenna also demonstrates excellent features including high gain, good stability, and symmetrical radiation pattern.
Starting Page	340
Ending Page	345
Page Count	6
ISSN	17518725
Volume Number	13
e-ISSN	17518733
Issue Number	Issue 3, Feb (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/13/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2018.5254
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2018-07-31
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Antenna Prototype Antenna Radiation Pattern Broadband Antenna Broadband CP Crossed-stepped-dipole Antenna CP Radiation Crossed-strip Dipoles CSSP Dipole Antenna Electromagnetic Wave Polarisation Frequency 3.38 GHz to 7.97 GHz Frequency 4.17 GHz to 7.67 GHz Magneto-electric Dipole Microstrip Antenna Modified Square-ring Patch Parasitic Cross-slotted Square Patch Ring-patch Mode Simple Broadband Circularly Polarised Crossed-dipole Antenna Single Antenna Slot Antenna Stepped Dipole Stepped Sections Strip Sections Vacant-quarter Rings Wide Axial Ratio Bandwidth
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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