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Design and Simulation of 2× 2Micro Strip Circular Patch Antenna Array at 28 GHz for 5G Mobile Station Application

Hasan Salim Abdullah, Ahmed Abdulsattar Mohamed, Abdulqader Mohanad Nawfal, Dawood Younis Shareef

International Journal of Electronics and Telecommunications

2022

Vol. 68. No. 4

721-–729

This paper proposes the design and simulation of 2×2 circular patch antenna array working at 28 GHz by using four inset feed micro strip circular patch antennas to achieve beam forming with directivity around 13dB which is required to overcome part of high path loss challenge for high data rate mm-5G mobile station application. Four element 2x2 array consists of two 1x2 circular patch antenna arrays based on power divider and quarter wavelength transition lines as a matching circuit. The designed antenna array is simulated on RT/duroid 5880 dielectric substrate with properties of 0.5mm thickness, dielectric constant ε r =2.2, and tangent loss of 0.0009 by using Computer System Technology (CST) software. The performances in terms of return loss, 3D–radiation pattern is evaluated at 28 GHz frequency band. The design also includes the possibility of inserting four identical 2x2 antenna arrays at four edges of mobile station substrate to achieve broad space coverage by steering the beams of the mobile station arrays.

Odbiorniki GNSS w praktyce inżynierskiej. Wpływ typu anteny na jakość pomiarów GNSS

Perski A., Wieczyński A., Baczyńska M., Bożek K., Kapelko S., Pawłowski S.

Pomiary Automatyka Robotyka

2013

R. 17, nr 10

106--122

W trzecim z serii artykułów przedstawiono wyniki badań stacjonarnych sześciu jednakowych odbiorników odbierających w tym samym czasie sygnały GNSS za pomocą anten różnych typów. Badania wykonano z wykorzystaniem płyt ewaluacyjnych wyposażonych w nowoczesne, jednoczęstotliwościowe odbiorniki GNSS skonfigurowane do pracy w trybie „wyłącznie GPS”. W trakcie badań wykonano trzy sesje pomiarowe w środowiskach o zróżnicowanym stopniu utrudnienia odbioru sygnałów GNSS. Uzyskane wyniki wskazują, że w aplikacjach przeznaczonych na rynek masowy wykorzystujących tanie odbiorniki GNSS właściwy dobór anteny może istotnie poprawić jakość i funkcjonalność produktu.

In the third article of a series we present the results of our researches performed in stationary conditions. We also give some explanations and guidelines about the most important features, classification and parameters of GNSS antennas and its influence on GNSS receiver’s performance. Phase Center Variation (PCV) and multipath effect mitigation techniques are briefly described. In performed researches, six exactly the same models of GNSS receivers worked at the same time with different models of antennas. The study was performed with the use of specially prepared evaluation boards, which were equipped with modern single frequency GNSS receivers configured to operate as a GPS only mode. Three test sessions, each in different environments of varying difficulty for receiving GNSS signals were carried out. The results show that also for applications using cheap GNSS receivers and aimed to the mass market, the proper selection of antennas can significantly improve the quality and functionality of the products.