Fluidic Antenna Reconfiguration Methods and Multi-Antenna Systems for Next Generation Wireless Networks
Loading...
Authors
Singh, Aditya
Date
Type
thesis
Language
eng
Keyword
Antennas , Fluids , Multiple-input Multiple-output , Distilled water , Reconfigurable antennas , 5G , User equipment , Base station , Fluidics , Dielectric fluid , Multi-antenna systems , Next Generation Wireless Networks , Wireless networks , Reconfiguration methods , Fluidic antennas
Alternative Title
Abstract
This thesis explores the design of planar reconfigurable antennas (RAs) using novel fluidic methods and further builds upon them to realize multi-antenna systems. Distilled water is utilized as the dielectric fluid (DF). First, a four-state frequency reconfigurable (FR) monopole is demonstrated using a DF-based loading technique. Measurements showed stable radiation patterns (RPs) and the best-in-class performance for fluidic planar antennas, with the impedance bandwidth (IBW), the tuning range (TR), and the antenna efficiency of 29.9%, 20.8%, and 90.4% respectively. Further, the fluidic channel is modified to demonstrate a two-state FR RP-diverse multiple-input multiple-output (MIMO) antenna, that serves long term evolution (LTE) bands 42, 43, and 46 with an excellent MIMO performance.
Second, a fluidic microstrip patch RA with the lowest profile is demonstrated with frequency and polarization tuning using DF-tuned stubs. Measurements showed a TR of 7.85% in the linear polarization (LP) mode and 5.76% in the circular polarization (CP) mode. First-time, an equivalent circuit of the proposed antenna is presented using a transmission line model for the fluidically-tuned stubs. Subsequently, a unique fluidic-circuit is conceptualized, for a four-element CP MIMO antenna, obtaining DF-switched CP (left-handed or right-handed CP). It offers simultaneous polarization switching, for all the elements with a single actuation, obtaining a 12 MHz overlapping axial ratio bandwidth (ARBW).
Third, a novel ten-element massive MIMO antenna for user equipment (UE) is demonstrated for fifth generation (5G) sub-6-GHz systems, with some space reserved for legacy antenna systems. A unique combination of an Inverted-F stub mode and a modified loop mode, improves the -6 dB IBW to 63%, and an estimated maximum channel capacity of 53.9 bps/Hz is achieved for a 10 × 10 MIMO link.
Last, a loop-loaded magneto-electric (ME) dipole antenna as a base station (BS) element is demonstrated, to enhance the IBW and the realized gain in the millimeter wave band. Balanced feed is utilized with a coplanar waveguide (CPW) to parallel stripline (PS) transition, feeding the ME antenna with a single point feed. The loop-loading enhances the IBW (75.8%) and the maximum realized gain (10.4 dB), by contributing an extra mode, with the same antenna size, and a simple in-house via-less fabrication.
Description
Citation
Publisher
License
Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
Attribution-NonCommercial-ShareAlike 3.0 United States
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
Attribution-NonCommercial-ShareAlike 3.0 United States