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Volume 8
Issue 11
10.3390/electronics8111241
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Article

Compact Differential-Fed Planar Filtering Antennas

by
Emadeldeen Hassan
1,2,*,
Denys Martynenko
3,
Eddie Wadbro
1,
Gunter Fischer
3 and
Martin Berggren
1
1
Department of Computing Science, Umeå University, 901 87 Umeå, Sweden
2
Department of Electronics and Electrical Communications, Menoufia University, 32952 Menouf, Egypt
3
IHP—Leibniz-Institut für innovative Mikroelektronik, Im Technologiepark 25, 15236 Frankfurt (Oder), Germany
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(11), 1241; https://doi.org/10.3390/electronics8111241
Submission received: 27 September 2019 / Revised: 21 October 2019 / Accepted: 25 October 2019 / Published: 30 October 2019
(This article belongs to the Section Microwave and Wireless Communications)
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Abstract

This paper proposes novel low-profile differential-fed planar antennas with embedded sharp frequency selectively. The antennas are compact and easy to integrate with differential devices without matching baluns. The antenna design is formulated as a topology optimization problem, where requirements on impedance bandwidth, directivity, and filtering are used as the design objectives. The optimized antennas operate over the frequency band 6.0–8.5 GHz. The antennas have reflection coefficients below −15 dB, cross-polarization levels below −42 dB, a maximum gain of 6.0 ± 0.5 dB, and a uniform directivity over more than 130° beamwidth angle in the frequency band of interest. In addition, the antennas exhibit sharp roll-off between the operational band and frequencies around the 5.8 GHz WiFi band and the 10 GHz X-band. One antenna has been fabricated with a good match between simulation and measurement results.
Keywords: antennas; differential line; planar circuits; filters; directivity; topology optimization; wideband systems antennas; differential line; planar circuits; filters; directivity; topology optimization; wideband systems

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MDPI and ACS Style

Hassan, E.; Martynenko, D.; Wadbro, E.; Fischer, G.; Berggren, M. Compact Differential-Fed Planar Filtering Antennas. Electronics 2019, 8, 1241. https://doi.org/10.3390/electronics8111241

AMA Style

Hassan E, Martynenko D, Wadbro E, Fischer G, Berggren M. Compact Differential-Fed Planar Filtering Antennas. Electronics. 2019; 8(11):1241. https://doi.org/10.3390/electronics8111241

Chicago/Turabian Style

Hassan, Emadeldeen, Denys Martynenko, Eddie Wadbro, Gunter Fischer, and Martin Berggren. 2019. "Compact Differential-Fed Planar Filtering Antennas" Electronics 8, no. 11: 1241. https://doi.org/10.3390/electronics8111241

APA Style

Hassan, E., Martynenko, D., Wadbro, E., Fischer, G., & Berggren, M. (2019). Compact Differential-Fed Planar Filtering Antennas. Electronics, 8(11), 1241. https://doi.org/10.3390/electronics8111241

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