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Abstract

The paper presents a series of designed microstrip antennas with different gain and width radiation characteristics and intended for use in Wi-Fi systems. These antennas in a multilayer system were analyzed with the use of computer programs, and then the parameters and characteristics of these antennas were measured. At the same time, to check the correctness of work, additional measurements of the temperature of the radiators were used with a thermal imaging camera. The obtained results were compared with the results of calculations and measurements. They show high compliance with both calculations and measurements. At the same time, thermovision measurements show the weaknesses of the designed power lines.
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Bibliography

[1] Sharma R., Mithilesh Kumar, Dual band planar microstrip antenna for 2.5/5.8 GHz wireless cellular applications, International Journal on Communications Antenna and Propagation, vol. 3, no. 2, pp. 90–96 (2013).
[2] Nelson I.O., Ademola A.Y., Patch antenna array feed design for a dish antenna, International Journal on Communications Antenna and Propagation, vol. 3, no. 5, pp. 261–266 (2013).
[3] Maloney J.G., Smith G.S., Scott W.R., Accurate computation of radiation from simple antenas using finite – difference time domain method, IEEE Trans. Antennas and Propagation, vol. 38 (1990).
[4] Ghaderi B., Parhizgar N., Resource allocation in MIMO systems specific to radio communication, Archives of Electrical Engineering, vol. 68, no. 1, pp. 91–100 (2019).
[5] Parhizgar N., A new mutual coupling compensation method for receiving antenna array-based DOA estimation, Archives of Electrical Engineering, vol. 67, no. 2 (2018).
[6] Bielecki Z.,Rogalski A., Optical signals detection, Scientific and Technical Publishing, Warsaw(2001).
[7] MinkinaW., Thermovision measurements – instruments and methods, Publishing House of the Czestochowa University of Technology, Czestochowa (2004).
[8] Balanis C.A., Antenna theory, New Jersey, John Wiley & Sons, Inc. (2005).
[9] Fang D.G., Antenna theory and microstrip antennas, CRC Press (2010).
[10] Lo Y.T., Lee S.W., Antenna Handbook, Antenna Theory, vol. 2 (1988).
[11] Taflowe A., Computational electrodynamics Finite – Difference Time Domain, Artech House, Boston (1995).
[12] Wnuk M., Analysis of radiating structures located on a multilayer dielectric, Warsaw, MUT (1999).
[13] Długosz T., Mutual influence of the TEM I transmission line of the tested object, Ph.D. dissertation, Dept. Elect. Eng., Wrocław (2007).
[14] Keshavarz S., Nozhat N., Dual-band Wilkinson power divider based on composite right/left-handed transmission lines, 13th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON) 2016, DOI: 10.1109/ECTICon.2016.7561268.
[15] Trikas P.A., Balanis C.A., Finite – difference time – domain technique for radiation by horn antennas, IEEE Antennas and Propagation Society International Symposium Digest, vol. 3 (1991).
[16] Gizem Toroglu, Levent Sevgi, Finite-difference time-domain (FDTD) matlab codes for first- and second-order em differential equations, IEEE Antennas and Propagation Magazine, vol. 56, no. 2, pp. 221–239 (2014), DOI: 10.1109/MAP.2014.6837093

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Authors and Affiliations

Marian Wnuk
1

  1. Military University of Technology, Poland
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Abstract

Research on improving the performance of microstrip antennas is continuously developing the following technology; this is due to its light dimensions, cheap and easy fabrication, and performance that is not inferior to other dimension antennas. Especially in telecommunications, microstrip antennas are constantly being studied to increase bandwidth and gain according to current cellular technology. Based on the problem of antenna performance limitations, optimization research is always carried out to increase the gain to become the antenna standard required by 5G applications. This research aims to increase the gain by designing a 5-element microstrip planar array antenna arrangement at a uniform distance (lamda/2) with edge weights at a frequency of 2.6 GHz, Through the 1x5 antenna design with parasitic patch, without parasitic, and using proximity coupling.This study hypothesizes that by designing an N-element microstrip planar array antenna arrangement at uniform spacing (lamda/2) with edge weights, a multi-beam radiation pattern character will be obtained so that to increase gain, parasitic patches contribute to antenna performance. This research contributes to improving the main lobe to increase the gain performance of the 1x5 planar array antenna. Based on the simulation results of a 1x5 microstrip planar array antenna using a parasitic patch and edge weighting, a gain value of 7.34 dB is obtained; without a parasitic patch, a gain value of 7.03 dB is received, using a parasitic patch and proximity coupling, a gain value of 2.29 dB is obtained. The antenna configuration with the addition of a parasitic patch, even though it is only supplied at the end (edge weighting), is enough to contribute to the parameters impedance, return loss, VSWR, and total gain based on the resulting antenna radiation pattern. The performance of the 1x5 microstrip planar array antenna with parasitic patch and double substrate (proximity coupling), which is expected to contribute even more to the gain side and antenna performance, has yet to be achieved. The 1x5 planar array antenna design meets the 5G gain requirement of 6 dB.
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Authors and Affiliations

Imelda Uli Vistalina Simanjuntak
1
Sulistyaningsih
2
Heryanto
3
Dian Widi Astuti
1

  1. Universitas Mercu Buana, Indonesia
  2. Badan Riset dan Inovasi Nasional, Indonesia
  3. Institut Teknologi PLN, Indonesia
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Abstract

A quasi-Yagi microstrip patch antenna with four directors and truncated ground plane has been designed and fabricated to have an ultra-wide bandwidth, high gain, low return loss and better directivity with center frequency at 3.40 GHz. After optimization, the proposed antenna yields an ultra-wide bandwidth of 1.20 GHz with lower and upper cutoff frequencies at 3.12 GHz and 4.32 GHz, respectively. High gain of 5.25 dB, return loss of -28 dB and directivity of 6.28 dB are obtained at resonance frequency of 3.40 GHz. The measured results of fabricated antenna have shown excellent agreement with the simulation results providing bandwidth of 1.34 GHz with lower and upper cutoff frequencies at 3.04 GHz and 4.38 GHz, respectively. The antenna gain of 5.33 dB, return loss of -44 dB are obtained at resonance frequency of 3.36 GHz. The dimension of the antenna is only of 65 mm x 45 mm ensuring compact in size.
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Authors and Affiliations

Hasanur Rahman Chowdhury
1 2
Sakhawat Hussain
1

  1. Department of Electrical and Electronic Engineering, University of Dhaka, Dhaka-1000, Bangladesh
  2. Department of Electrical & Computer Engineering, Michigan State University, East Lansing, Michigan, USA

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