Multi-Input Multi-Output Compact Antenna with One-Way Circular Polarization for WiMAX 3.5 and ITU-R Applications
Tohid Aribi
1
(
Department of Electrical Engineering, Miandoab Branch, Islamic Azad University, Miandoab, Iran
)
Keywords: Antenna, Dual-band, Circular polarization, Multi-Input Multi-Output.,
Abstract :
In this research, a compact multi-layer microstrip antenna for Multiple-Input Multiple-Output (MIMO) systems with dual-band circular polarization capability has been designed, simulated, and fabricated. The structure of this antenna utilizes separate coupling networks for each frequency band. Each network consists of intricate components such as a hairpin resonator, a straight slot, and a U-shaped groove. This design allows for the creation of two paths with appropriate phase differences to connect the input signal to the patch. By applying a positive or negative 90-degree phase shift, the antenna achieves linear operation capability in both frequency bands. The main innovation of this research lies in creating circular polarization using a multi-layer feeding pattern that ensures an axial ratio of less than 3 dB. This is achieved through the combination of a straight slot and U-shaped groove to produce a circular polarization resonance mode. This antenna is capable of generating right-hand and left-hand circular polarization characteristics in different bands. Results from simulations and practical experiments confirm the desirable performance of this antenna. The designed antenna has impedance bandwidths in the ranges of 3 to 4.2 GHz and 5.5 to 6.6 GHz, and it achieves circular polarization characteristics in almost the entire first frequency band. The antenna gain curve also shows a linear increasing trend with an average of 5 dB.
Realization of circular polarization completely in one of the functional bands
Suitable gain in functional bands
The compactness of the structure
[1] T. Sedghi, T. Aribi and A. Kalami, “WiMAX and C bands semi-fractal circularly polarized antenna with satellite bands filtering properties,” International Journal of Microwave and Wireless Technologies, vol. 10, no. 8, November 2018, doi:10.1017/S1759078718000673.
[2] T. Aribi, M. Naser-Moghadasi and R.A. Sadeghzadeh, “Circularly polarized beam-steering antenna array with enhanced characteristics using UCEBG structure,” International Journal of Microwave and Wireless Technologies, vol. 8, no.6, September 2016.
[3] MM. Maleki, T. Aribi and A. Shadmand, “Implementation of a Miniaturized Planar 4-Port Microstrip Butler Matrix for Broadband Applications,” Journal of Southern Communication Engineering, vol 9, no.1, Janurary 2020, doi:10.22070/jce.2020.5295.1154.
[4] T. Sedghi, “Compact Unit-cell based Semi-Fractal Antenna with filtering properties of interference Bands Embedded with CBP Strips,” IETE Journal of Research, vol. 65, no. 6, pp. 790-795, November 2019, doi: 10.1080/03772063.2018.1464973.
[5] T. Sedghichongaralouye-Yekan, M. Naser-Moghadasi and R. A. Sadeghzadeh, “Broadband Circularly Polarized 2×2 Antenna Array with Sequentially Rotated Feed Network for C-Band Application,” Wireless Personal Communications, vol. 91, no. 2, pp. 653-660, November 2016, doi:10.1007/s11277-016-3485-4.
[6] A. M. Javanshir, T. Aribi, T. Sedghi and A. Kalami, “High performance and compact antenna with new scheme for broadband circular polarisation applications,” International Journal of Electronics Letters, 2024, doi: 10.1080/21681724.2024.2372737.
[7] S. Rezaee and Y. Zehforoosh, “Design of a Planar Multiband Antenna Using Metamaterials,” Journal of Southern Communication Engineering, vol.11, no. 43, pp. 15-26, 2022 [in Persian].
[8] ZZ. A. Darabi and S. S. Tehrani, “Design and Simulation a New Dual Band Dipole Antenna for RFID Tags,” Journal of Southern Communication Engineering, vol.9, no. 35, pp. 69-76, 2021 [in Persian].
[9] FF. Heidari, Z. Adelpoure and N. Parhizgar, “Simulation of Leaky Wave Antenna with Cosecant Squared Pattern Using Genetic Algorithm,” Journal of Southern Communication Engineering, vol.11, no. 42, pp. 69-76, 2022 [in Persian].
[10] M. Jalali and T. Sedghi, “Circularly Polarized MIMO Antenna Array with Enhanced Characteristics using EBG structure,” ELECTRONIC INDUSTRIES, vol, 10, no.2, pp. 13-24, August 2019.
[11] S. Rezaee and Y. Zehforoosh, “Design of a Planar Multiband Antenna Using Metamaterials,” Journal of Southern Communication Engineering, vol.11, no. 43, pp. 15-26, 2022 [in Persian].
[12] F. Heidari, Z.Adelpoure and N. Parhizgar, “Simulation of Leaky Wave Antenna with Cosecant Squared Pattern Using Genetic Algorithm,” Journal of Southern Communication Engineering, vol.11, no. 42, pp. 69-76, 2022 [in Persian].
