THREE ELEMENT DUAL SEGMENT TRIANGULAR DIELECTRIC RESONATOR ANTENNA FOR X-BAND APPLICATIONS

Abstract-A wideband dual segment three element triangular dielectric resonator antenna (TDRA) has been proposed for applications in X-band. Proposed antenna has been fabricated and tested. The simulation study of the antenna is carried out using Ansoft HFSS simulation software. The simulation results for input characteristics and radiation patterns of the proposed antenna are compared with corresponding experimental results at the resonant frequency. The simulation results are in agreement with the measurement results. The return loss-frequency characteristics of the proposed antenna are also compared with those of single element, and three element TDRAs

Recent Advances in Antenna Design for 5G Heterogeneous Networks

The aim of this book is to highlight up to date exploited technologies and approaches in terms of antenna designs and requirements. In this regard, this book targets a broad range of subjects, including the microstrip antenna and the dipole and printed monopole antenna. The varieties of antenna designs, along with several different approaches to improve their overall performance, have given this book a great value, in which makes this book is deemed as a good reference for practicing engineers and under/postgraduate students working in this field. The key technology trends in antenna design as part of the mobile communication evolution have mainly focused on multiband, wideband, and MIMO antennas, and all have been clearly presented, studied and implemented within this book. The forthcoming 5G systems consider a truly mobile multimedia platform that constitutes a converged networking arena that not only includes legacy heterogeneous mobile networks but advanced radio interfaces and the possibility to operate at mm wave frequencies to capitalize on the large swathes of available bandwidth. This provides the impetus for a new breed of antenna design that, in principle, should be multimode in nature, energy efficient, and, above all, able to operate at the mm wave band, placing new design drivers on the antenna design. Thus, this book proposes to investigate advanced 5G antennas for heterogeneous applications that can operate in the range of 5G spectrums and to meet the essential requirements of 5G systems such as low latency, large bandwidth, and high gains and efficiencies

UWB Technology

Ultra Wide Band (UWB) technology has attracted increasing interest and there is a growing demand for UWB for several applications and scenarios. The unlicensed use of the UWB spectrum has been regulated by the Federal Communications Commission (FCC) since the early 2000s. The main concern in designing UWB circuits is to consider the assigned bandwidth and the low power permitted for transmission. This makes UWB circuit design a challenging mission in today's community. Various circuit designs and system implementations are published in this book to give the reader a glimpse of the state-of-the-art examples in this field. The book starts at the circuit level design of major UWB elements such as filters, antennas, and amplifiers; and ends with the complete system implementation using such modules

Ultra Wideband

Ultra wideband (UWB) has advanced and merged as a technology, and many more people are aware of the potential for this exciting technology. The current UWB field is changing rapidly with new techniques and ideas where several issues are involved in developing the systems. Among UWB system design, the UWB RF transceiver and UWB antenna are the key components. Recently, a considerable amount of researches has been devoted to the development of the UWB RF transceiver and antenna for its enabling high data transmission rates and low power consumption. Our book attempts to present current and emerging trends in-research and development of UWB systems as well as future expectations

Investigations on possible realization of log periodic dielectric resonator antenna

Over the last few decades, a tremendous growth has been seen in the wideband high-frequency communication systems. In addition to other necessary requirements,a compact size, high-efficiency antenna design with low conductor loss is mandatory for enabling high data rate communication. In recent years, Dielectric Resonator Antenna (DRA) has proven to be of exceptional low profile, light weight antenna, which provide wide bandwidth with low dissipation loss compared with microstrip antennas. The gain, bandwidth, and radiation characteristic of DRA can be improved by using array instead of single element DRA. The radiation performance of DRA array can be further enhanced by using log periodic technique.With the growing demand of high speed data transfer and internet access, the communication systems operating in the X, Ku, K and Ka-bands are becoming more prevalent. In this thesis, some DRA array designs based on log periodic technique are investigated experimentally for high frequency wideband applications such as X, Ku, and NATO K-band (K and Ka band jointly known as NATO K-band).The Log Periodic Dielectric Resonator Antenna (LPDRA) array relies on recent developments of wideband DRA array and multi-frequency log periodic technique.The design of LPDRA array is proposed to achieve significant multi-resonant wide bandwidth, with low conductor loss for high frequency applications.The present work deals with the design and analysis of some log-periodic DRA with different feeding methods: Branch microstrip line fed LPDRA; Capacitive coupled LPDRA; Electromagnetically coupled LPDRA and Nine elements LPDRA with dielectric resonators of high relative permittivity as well as with low relative permittivity material.An assay on k-β diagram has also been presented to verify the propagation characteristics of the designed LPDRA array. The proposed LPDRAs offer continuous operation over a wide bandwidth. It provides high efficiency with low cross polarization level and sufficient gain for practical applications. Due to the inherited advantages of Log Periodic DRA array over single DRAs, the LPDRA designs can have applications at microwave and millimetre wave communication like satellite and radar systems

Antenna Designs for 5G/IoT and Space Applications

This book is intended to shed some light on recent advances in antenna design for these new emerging applications and identify further research areas in this exciting field of communications technologies. Considering the specificity of the operational environment, e.g., huge distance, moving support (satellite), huge temperature drift, small dimension with respect to the distance, etc, antennas, are the fundamental device allowing to maintain a constant interoperability between ground station and satellite, or different satellites. High gain, stable (in temperature, and time) performances, long lifecycle are some of the requirements that necessitates special attention with respect to standard designs. The chapters of this book discuss various aspects of the above-mentioned list presenting the view of the authors. Some of the contributors are working strictly in the field (space), so they have a very targeted view on the subjects, while others with a more academic background, proposes futuristic solutions. We hope that interested reader, will find a fertile source of information, that combined with their interest/background will allow efficiently exploiting the combination of these two perspectives

Design and analysis of wideband passive microwave devices using planar structures

A selected volume of work consisting of 84 published journal papers is presented to demonstrate the contributions made by the author in the last seven years of his work at the University of Queensland in the area of Microwave Engineering. The over-arching theme in the author’s works included in this volume is the engineering of novel passive microwave devices that are key components in the building of any microwave system. The author’s contribution covers innovative designs, design methods and analyses for the following key devices and associated systems: Wideband antennas and associated systems Band-notched and multiband antennas Directional couplers and associated systems Power dividers and associated systems Microwave filters Phase shifters Much of the motivation for the work arose from the desire to contribute to the engineering o

Antennas and Propagation Aspects for Emerging Wireless Communication Technologies

The increasing demand for high data rate applications and the delivery of zero-latency multimedia content drives technological evolutions towards the design and implementation of next-generation broadband wireless networks. In this context, various novel technologies have been introduced, such as millimeter wave (mmWave) transmission, massive multiple input multiple output (MIMO) systems, and non-orthogonal multiple access (NOMA) schemes in order to support the vision of fifth generation (5G) wireless cellular networks. The introduction of these technologies, however, is inextricably connected with a holistic redesign of the current transceiver structures, as well as the network architecture reconfiguration. To this end, ultra-dense network deployment along with distributed massive MIMO technologies and intermediate relay nodes have been proposed, among others, in order to ensure an improved quality of services to all mobile users. In the same framework, the design and evaluation of novel antenna configurations able to support wideband applications is of utmost importance for 5G context support. Furthermore, in order to design reliable 5G systems, the channel characterization in these frequencies and in the complex propagation environments cannot be ignored because it plays a significant role. In this Special Issue, fourteen papers are published, covering various aspects of novel antenna designs for broadband applications, propagation models at mmWave bands, the deployment of NOMA techniques, radio network planning for 5G networks, and multi-beam antenna technologies for 5G wireless communications