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Open AccessEditor’s ChoiceArticle

A New and Compact Wide-Band Microstrip Filter-Antenna Design for 2.4 GHz ISM Band and 4G Applications

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Biomedical and Electronics Engineering, Faculty of Engineering and Informatics, University of Bradford, Bradford BD7 1DP, UK
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Electronic Techniques Department, Basra Technical Institute, Southern Technical University, Basra 61001, Iraq
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Instituto de Telecomunicações, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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Department of Electrical Engineering, University of Misan, Misan 62001, Iraq
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Department of Communication and Informatics Engineering, Basra University College of Science and Technology, Basra 61004, Iraq
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Author to whom correspondence should be addressed.
Electronics 2020, 9(7), 1084; https://doi.org/10.3390/electronics9071084
Received: 15 June 2020 / Revised: 25 June 2020 / Accepted: 28 June 2020 / Published: 2 July 2020
(This article belongs to the Special Issue Recent Advances in Antenna Design for 5G Heterogeneous Networks)
A new and compact four-pole wide-band planar filter-antenna design is proposed in this article. The effect of the dielectric material type on the characteristics of the design is also investigated and presented. The filter-antenna structure is formed by a fourth-order planar band-pass filter (BPF) cascaded with a monopole microstrip antenna. The designed filter-antenna operates at a centre frequency of 2.4 GHz and has a relatively wide-band impedance bandwidth of about 1.22 GHz and a fractional bandwidth (FBW) of about 50%. The effects of three different types of substrate material, which are Rogers RT5880, Rogers RO3003, and FR-4, are investigated and presented using the same configuration. The filter-antenna design is simulated and optimised using computer simulation technology (CST) software and is fabricated and measured using a Rogers RT5880 substrate with a height (h) of 0.81 mm, a dielectric constant of 2.2, and a loss tangent of 0.0009. The structure is printed on a compact size of 0.32 λ0 × 0.30 λ0, where λ0 is the free-space wavelength at the centre frequency. A good agreement is obtained between the simulation and measurement performance. The designed filter-antenna with the achieved performance can find different applications for 2.4 GHz ISM band and 4G wireless communications. View Full-Text
Keywords: band-pass; compact; filter-antenna; LTE; microstrip; 4G band-pass; compact; filter-antenna; LTE; microstrip; 4G
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Al-Yasir, Y.I.A.; Alkhafaji, M.K.; A. Alhamadani, H.; Ojaroudi Parchin, N.; Elfergani, I.; Saleh, A.L.; Rodriguez, J.; Abd-Alhameed, R.A. A New and Compact Wide-Band Microstrip Filter-Antenna Design for 2.4 GHz ISM Band and 4G Applications. Electronics 2020, 9, 1084.

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