Construction of compact two‐port throne‐shaped antenna with dual stopbands and high isolation for Ultrawideband Multiple‐Input Multiple‐Output wireless communication systems

Abstract

Summary A throne‐shaped compact ultrawideband (UWB) two‐port multiple‐input multiple‐output (MIMO) antenna operating from 2.9 to 11.5 GHz is introduced. Dual‐band rejections are created at the center frequency of 5.5 and 7.5 GHz by embedding U‐slot on the feedline and split ring resonator (SRR) on the ground plane to eliminate interference with narrowband systems of these frequencies, respectively. Low mutual coupling of −22 dB is obtained almost throughout the full band by etching a rectangular slot in a cone‐shaped stub. Procedures for achieving the UWB band as well as two stopbands are discussed in detail. Current distribution, gain and radiation pattern for the proposed antenna are also studied. Peak gain of 2.51 dBi and radiation efficiency greater than 73% is obtained. Diversity parameters confirming the MIMO characteristics are also investigated. Experimental results are obtained through a practical model in the anechoic chamber to validate the simulations.

Compact ultrawideband MIMO slot antenna with high isolation

“…As ultrawideband antennas can enlarge the communication capacity 1,2 and multiple-input-multiple-output (MIMO) antennas can minimize multipath fading, [3][4][5] ultrawideband MIMO antennas have been popularly applied in wireless communication. For example, in order to simultaneously serve GSM900/1800 (825-960/1710-1920 MHz) for 2G mobile communication, wideband code division multiple access (WCDMA), time division-synchronous code division multiple access (TD-SCDMA), and CDMA2000 (1880-2170 MHz) for 3G systems, LTE2300/2600 (2300-2690 MHz) for 4G communication, various 5G (703-803/2515-2675/3400-3800/4800-5000 MHz) systems, and Wi-Fi (5150-5925 MHz) communication, an ultrawideband MIMO antenna with bandwidth of more than 157.6% is in great need.…”

An ultra‐wideband dual circularly polarized slot antenna with high isolation

“…[1][2][3][4] Meanwhile, ultra-wideband (UWB) antennas with an impedance bandwidth (IBW) of more than 100% have drawn extensive attention due to the increasing demands for higher data rates and greater capacity in wireless systems. 5 Additionally, port-port isolation is a critical consideration in the design of antennas. 6,7 Therefore, it is essential to research UWB dual-CP antennas with excellent impedance matching and high isolation for wireless communication.…”

“…Circularly polarized (CP) antennas have enjoyed prominent applications in many systems for the better performance of receiving the incident waves with any polarization and reducing multipath interferences 1–4 . Meanwhile, ultra‐wideband (UWB) antennas with an impedance bandwidth (IBW) of more than 100% have drawn extensive attention due to the increasing demands for higher data rates and greater capacity in wireless systems 5 . Additionally, port–port isolation is a critical consideration in the design of antennas 6,7 .…”

A Novel Two Ports MIMO Antenna Having Dual Stopped-band Functionality and Enhanced Isolation

“…In study [20], a 35 × 40 mm 2 throne-shaped MIMO antenna is introduced. The antenna operates in 2.9-11.5 GHz frequency bandwidth with dual-band rejection ability for 5.50 and 7.50 GHz bands.…”