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Bandwidth Enhancement and Frequency Scanning Array Antenna Using Novel UWB Filter Integration Technique for OFDM UWB Radar Applications in Wireless Vital Signs Monitoring

1
Department of Electrical Engineering, Polytechnique Montreal, Montreal, QC H3T1J4, Canada
2
Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S4L8, Canada
3
Health Technology Incubator, Jahrom University of Medical Sciences, 74148-46199 Jahrom, Iran
4
Department of Mechanical and Industrial Engineering, College of Engineering, Qatar University, Doha 2713, Qatar
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(9), 3155; https://doi.org/10.3390/s18093155
Received: 1 September 2018 / Revised: 12 September 2018 / Accepted: 14 September 2018 / Published: 19 September 2018
(This article belongs to the Special Issue Antenna Technologies for Microwave Sensors)
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Abstract

This paper presents the bandwidth enhancement and frequency scanning for fan beam array antenna utilizing novel technique of band-pass filter integration for wireless vital signs monitoring and vehicle navigation sensors. First, a fan beam array antenna comprising of a grounded coplanar waveguide (GCPW) radiating element, CPW fed line, and the grounded reflector is introduced which operate at a frequency band of 3.30 GHz and 3.50 GHz for WiMAX (World-wide Interoperability for Microwave Access) applications. An advantageous beam pattern is generated by the combination of a CPW feed network, non-parasitic grounded reflector, and non-planar GCPW array monopole antenna. Secondly, a miniaturized wide-band bandpass filter is developed using SCSRR (Semi-Complementary Split Ring Resonator) and DGS (Defective Ground Structures) operating at 3–8 GHz frequency band. Finally, the designed filter is integrated within the frequency scanning beam array antenna in a novel way to increase the impedance bandwidth as well as frequency scanning. The new frequency beam array antenna with integrated band-pass filter operate at 2.8 GHz to 6 GHz with a wide frequency scanning from the 50 to 125-degree range. View Full-Text
Keywords: frequency scanning fan beam array antenna; wide-band applications; miniaturized band-pass filter; DGS (Defective Ground Structures); grounded coplanar waveguide (GCPW); grounded reflector; SCSRR (Semi-Complementary Split Ring Resonator) frequency scanning fan beam array antenna; wide-band applications; miniaturized band-pass filter; DGS (Defective Ground Structures); grounded coplanar waveguide (GCPW); grounded reflector; SCSRR (Semi-Complementary Split Ring Resonator)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Rahman, M.; NaghshvarianJahromi, M.; Mirjavadi, S.S.; Hamouda, A.M. Bandwidth Enhancement and Frequency Scanning Array Antenna Using Novel UWB Filter Integration Technique for OFDM UWB Radar Applications in Wireless Vital Signs Monitoring. Sensors 2018, 18, 3155.

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