Design and Experimental Analysis of Miniaturized Octa-Port UWB/SWB-MIMO Antenna With Triple-Band Rejection Characteristics

摘要

This paper introduces the design and experimental analysis of an eight-port Ultra Wide Band (UWB)/Super Wide Band MIMO antenna with the with triple-band rejection characteristics. The proposed UWB design includes a square-shaped radiator and a shared partial ground with novel hexagonal-ring type fencing decoupling structure to achieve UWB and a high degree of isolation between radiating elements. The partial ground with hexagonal-ring type fencing is employed to achieve a broad impedance matching of 7.4?GHz (3.1–12?GHz), while the notch bands are realized at 5?GHz (4.6 to 5.9?GHz), 8?GHz (7.70–8.43?GHz), and 10.5?GHz (10.3–10.98?GHz) by using Substrate Integrated Waveguide(SIW) based metallic via integration of hexagonal and semi-hexagonal parasitic slot stub with radiator. The band notch band characteristics obtained autonomously without modifying antenna performance. The fabricated antenna is having a very compact size of mm . The important antenna characteristics of proposed antenna, such as bandwidth (7.4?GHz), isolation (>20?dB), gain(0-7.5), efficiency(80), radiation pattern, Envelop Correlation Coefficient(ECC)(0.015), Total Active Reflection Coefficient (TARC) and Channel Capacity Loss (CCL) are examined.