Isosceles Triangular Resonator Based Compact Triple Band Quad Element Multi Terminal Antenna

Abstract

A triple band quad element multi-input-multioutput (MIMO) antenna is proposed for Bluetooth (2.4 GHz), WLAN (2.5/4.9 GHz) and LTE (3.7 GHz) applications. A compact triangular ring-shaped structure is used as an antenna element. An isosceles triangular ring resonator is designed in such a way that it offers dual-band and another ring resonator is placed inside the empty space of the first resonator to obtain the third band. The antenna element is studied in terms of |S 11 | and also the current distributions are observed at three resonance frequencies to find out the resonance mechanism. The proposed quad element MIMO antenna is compact in total area (0.45λ 0 × 0.45λ 0). Isolation better than 20 dB is achieved with minimum inter-element spacing of 0.07λ 0 without extra isolation circuit. Gain, radiation patterns, envelope correlation coefficient (ECC), diversity gain (DG), channel capacity loss (CCL) and total active reflection coefficient (TARC) values are studied to comprehend the MIMO performance of the proposed design.

Dual-Polarized MIMO Antenna System for 5G Indoor base Station Applications

“…The signal-to-noise ratio enhancement as compared to a single antenna is referred to as diversity gain. In [20], DG is calculated and plotted using (12) The capacity of a MIMO system increases as the number of antennas increases. However, due of the addition of a correlation factor between the MIMO antennas parts, channel capacity losses increase as well.…”

High Isolation Four-Port Wrench Shaped Compact Uwb Mimo Antenna for 3.1-10.6 GHZ Band

“…To reduce this mutual coupling, various mutual coupling (MC) reduction or decoupling, or isolation enhancement techniques were introduced in the literature. They are neutralization line (NL) [2], decoupling network (DN) [3][4][5][6], metasurface, metamaterial (MTM) [7], electronic band gap (EBG) [8,9], frequency selective surface (FSS), photonic band gap (PBG), optically transparent structures [10], split ring resonator (SRR), complementary split ring resonator (CSRR) [11,12], dielectric resonator antenna (DRA), ground plane modification (GPM), defected ground structure (DGS) [13,14], slots [15][16][17][18], band notching techniques implementation, parasitic elements, metal strips, shorting pins, insertion of stubs [19][20][21], frequency reconfigurable [22,23], implementing PIN diodes, microstrip open loop resonator (MOLR), quasi self complementary antenna (QSCA) [24], inter element spacing [25][26][27][28][29], insertion of slits, fractal structures, modified substrates, locating antennas on different substrate layers, etc. These techniques improve impedance matching, enhance gain, efficiency, and increase the complexity of antenna design.…”