Investigations on Frequency Agile Behavior of Narrowband and Wideband Microstrip Patch Antennas by Employing Variable Height Ground Planes PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Investigations on Frequency Agile Behavior of Narrowband and Wideband Microstrip Patch Antennas by Employing Variable Height Ground Planes PDF full book. Access full book title Investigations on Frequency Agile Behavior of Narrowband and Wideband Microstrip Patch Antennas by Employing Variable Height Ground Planes by Rahul Bakshi. Download full books in PDF and EPUB format.
Author: Rahul Bakshi
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
Get Book Here
Book Description
Microstrip patch antennas have been studied and designed extensively over the years which find many applications in wireless communications, satellite communications and radar applications. These antennas have features such as simple, robust, low profile, cheaper and versatile for various modes of operations. However, the patch antennas are inherently narrow band, hence require wide-bandwidth and/or frequency agile property in order to meet the need of modern wireless communications applications. This thesis presents investigation results on the effect of employing variable height ground plane and copper ribbon switches on the frequency agile behavior of wideband microstrip patch antenna. The effect of ground plane height variation not only alters operating frequency, but also, Gain and impedance bandwidth. First a narrow band patch antenna and its array configuration will be studied for its frequency agility and far-field performance by varying the ground plane, followed by the proposed wideband patch antenna, which is basically a U-slot loaded modified E-shape microstrip patch antenna (USLMES). The narrowband patch antenna achieves 33% frequency agility which increases to 43% for the array configuration. The proposed USLMES antenna is excited using the notch feed mechanism by a 50 [upper case omega] coaxial probe outside the patch surface so that coaxial probe does not contribute significantly to the peak-cross-polarization levels. The parametric study results are presented for the wideband patch antenna design and important parameters have been noted. The proposed wideband patch antenna offers impedance (S11 = -10 dB) and 3dB gain bandwidths of at least 35% (3.09GHz to 4.42GHz) and approaches 38% (3.09GHz to 4.59GHz) based on experimental measured data with stable radiation patterns and acceptable cross-polarization levels. Frequency agility is also achieved from 3.02GHz to 4.95 GHz by turning different combination of copper ribbon switches ON/OFF in the later part of the thesis. The prototype antennas were fabricated and experimentally verified for both frequency agility and wideband patch performance verifications. The simulated performance is in reasonable agreement with the measured results. The proposed wideband microstrip patch antenna can be used as the radiating elements in base station applications.
Author: Rahul Bakshi
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
Get Book Here
Book Description
Microstrip patch antennas have been studied and designed extensively over the years which find many applications in wireless communications, satellite communications and radar applications. These antennas have features such as simple, robust, low profile, cheaper and versatile for various modes of operations. However, the patch antennas are inherently narrow band, hence require wide-bandwidth and/or frequency agile property in order to meet the need of modern wireless communications applications. This thesis presents investigation results on the effect of employing variable height ground plane and copper ribbon switches on the frequency agile behavior of wideband microstrip patch antenna. The effect of ground plane height variation not only alters operating frequency, but also, Gain and impedance bandwidth. First a narrow band patch antenna and its array configuration will be studied for its frequency agility and far-field performance by varying the ground plane, followed by the proposed wideband patch antenna, which is basically a U-slot loaded modified E-shape microstrip patch antenna (USLMES). The narrowband patch antenna achieves 33% frequency agility which increases to 43% for the array configuration. The proposed USLMES antenna is excited using the notch feed mechanism by a 50 [upper case omega] coaxial probe outside the patch surface so that coaxial probe does not contribute significantly to the peak-cross-polarization levels. The parametric study results are presented for the wideband patch antenna design and important parameters have been noted. The proposed wideband patch antenna offers impedance (S11 = -10 dB) and 3dB gain bandwidths of at least 35% (3.09GHz to 4.42GHz) and approaches 38% (3.09GHz to 4.59GHz) based on experimental measured data with stable radiation patterns and acceptable cross-polarization levels. Frequency agility is also achieved from 3.02GHz to 4.95 GHz by turning different combination of copper ribbon switches ON/OFF in the later part of the thesis. The prototype antennas were fabricated and experimentally verified for both frequency agility and wideband patch performance verifications. The simulated performance is in reasonable agreement with the measured results. The proposed wideband microstrip patch antenna can be used as the radiating elements in base station applications.
Author: Rod Waterhouse
Publisher: Springer Science & Business Media
ISBN: 1475737912
Category : Technology & Engineering
Languages : en
Pages : 427
Get Book Here
Book Description
This useful tool provides the reader with a current overview of where microstrip patch antenna technology is at, and useful information on how to design this form of radiator for their given application and scenario. Practical design cases are provided for each goal.
Author: Shiv Narayan
Publisher: Springer
ISBN: 9812877754
Category : Technology & Engineering
Languages : en
Pages : 62
Get Book Here
Book Description
This book focuses on performance enhancement of printed antennas using frequency selective surfaces (FSS) technology. The growing demand of stealth technology in strategic areas requires high-performance low-RCS (radar cross section) antennas. Such requirements may be accomplished by incorporating FSS into the antenna structure either in its ground plane or as the superstrate, due to the filter characteristics of FSS structure. In view of this, a novel approach based on FSS technology is presented in this book to enhance the performance of printed antennas including out-of-band structural RCS reduction. In this endeavor, the EM design of microstrip patch antennas (MPA) loaded with FSS-based (i) high impedance surface (HIS) ground plane, and (ii) the superstrates are discussed in detail. The EM analysis of proposed FSS-based antenna structures have been carried out using transmission line analogy, in combination with the reciprocity theorem. Further, various types of novel FSS structures are considered in designing the HIS ground plane and superstrate for enhancing the MPA bandwidth and directivity. The EM design and performance analyses of FSS-based antennas are explained here with the appropriate expressions and illustrations.
Author: Jagadish Jadhav
Publisher: GRIN Verlag
ISBN: 3346453650
Category : Technology & Engineering
Languages : en
Pages : 56
Get Book Here
Book Description
Scientific Study from the year 2021 in the subject Engineering - Communication Technology, , course: M. Tech, language: English, abstract: Microstrip patch antenna is used to send onboard parameters of article to the ground while under operating conditions. By the study of this book we find out how to investigate a new method of teaching microstrip patch antenna design for undergraduate students by using MATLAB. Effect of changes in basic parameter microstrip patch antenna on its radiation pattern and other parameters to study the effect of resonant frequency and substrate parameters like, relative dielectric constant, substrate thickness on the radiation parameters of bandwidth and physical dimension of the microstrip patch antenna can be determined by using GUI. In this book we develops simple CAD (GUI) formulas that describe the basic properties of microstrip patch antenna using MATLAB. By the usage of this teaching tool we can analyze the behaviour of the microstrip patch antenna and design of it for different material. Satellite communication and wireless communication has been developed rapidly in the past decades and it has already a dramatic impact on human life. In the last few years, the development of wireless local area networks (WLAN) represented one of the principal interests in the information and communication field. Thus, the current trend in commercial and government communication systems has been to develop low cost, minimal weight, low profile antennas that are capable of maintaining high performance over a large spectrum of frequencies. This technological trend has focused much effort into the design of microstrip (patch) antennas. The variety in design that is possible with microstrip antenna probably exceeds that of any other type of antenna element. In addition, once the shape and operating mode of the patch are selected, designs become very versatile in terms of operating frequency, polarization, pattern, and impedance. They are extremely low profile, lightweight, simple and inexpensive to fabricate using modern day printed circuit board technology, compatible with microwave and millimeter-wave integrated circuits (MMIC), and have the ability to conform to planar and non planar surfaces.
Author: Kai Fong Lee
Publisher: World Scientific
ISBN: 184816453X
Category : Technology & Engineering
Languages : en
Pages : 546
Get Book Here
Book Description
Microstrip patch antennas have become the favorite of antenna designers because of its versatility and advantages of planar profile, ease of fabrication, compatibility with integrated circuit technology, and conformability with a shaped surface. As there is currently an urgent need for graduate students and practicing engineers to gain an in-depth understanding of this subject, this book was written with this purpose in mind. The authors are IEEE Fellows who have made significant contributions to their fields of expertise. Professor K F Lee was the recipient of the 2009 John Kraus Antenna Award of the IEEE Antennas and Propagation Society.
Author: Sudipta Chattopadhyay
Publisher: BoD – Books on Demand
ISBN: 9535136011
Category : Technology & Engineering
Languages : en
Pages : 160
Get Book Here
Book Description
The progress in modern tiny multifunctional wireless devices has dramatically increased the demand for microstrip antennas in recent years. Furthermore, in the last few years, such microstrip antennas found numerous applications in both the military and the commercial sectors. Therefore, microstrip patch antenna has become a major focus to the researchers in the field of antenna engineering. In this book, some recent advances in microstrip antennas are presented. This book contains mainly three sections. In the first section, some new approaches to modern analytical techniques rather than the conventional cavity model, transmission line model, or spectral domain analysis have been discussed. In the second section of the book, a light has been showered on some new techniques for bandwidth enhancement of microstrip radiators. In the last section of the book, the recent trends in microstrip antenna research have been showcased. Some newfangled application-oriented approach to this field is vividly discussed. The books main objective is to facilitate the microstrip antenna researchers for exploring the subject in more vibrant manner and also to revolutionize wireless communications. A sufficient number of topics have been covered, some for the first time in a research handbook. I hope that the book will surely be beneficial for scientists, practicing engineers, and researchers working in the field of microstrip antennas.
Author: Ahmed Kishk
Publisher: BoD – Books on Demand
ISBN: 9535110195
Category : Technology & Engineering
Languages : en
Pages : 398
Get Book Here
Book Description
The book discusses basic and advanced concepts of microstrip antennas, including design procedure and recent applications. Book topics include discussion of arrays, spectral domain, high Tc superconducting microstrip antennas, optimization, multiband, dual and circular polarization, microstrip to waveguide transitions, and improving bandwidth and resonance frequency. Antenna synthesis, materials, microstrip circuits, spectral domain, waveform evaluation, aperture coupled antenna geometry and miniaturization are further book topics. Planar UWB antennas are widely covered and new dual polarized UWB antennas are newly introduced. Design of UWB antennas with single or multi notch bands are also considered. Recent applications such as, cognitive radio, reconfigurable antennas, wearable antennas, and flexible antennas are presented. The book audience will be comprised of electrical and computer engineers and other scientists well versed in microstrip antenna technology.
Author: Dhivya Ketharnath
Publisher:
ISBN:
Category :
Languages : en
Pages : 104
Get Book Here
Book Description
The application of microstrip patch antenna due to their low profile and easy fabrication has triggered extensive research. Much of the research is focused on offsetting one of the main drawbacks of the microstrip antenna, its low impedance bandwidth. Due to the nature of the applications, it is of considerable interest to study the effect of the finite metallic ground plane and curvature on the performance of the microstrip patch antenna. In this thesis we study the empirical design techniques of a wideband microstrip patch antenna. Simulation studies for effect of the curvature and finite ground plane on the impedance bandwidth and gain of the microstrip patch antenna is presented.
Author: Marjan Kashani
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
In this thesis, I performed a study on the electromagnetic behaviors of an Electromagnetic Bandgap (EBG) structure with a specific set of parameters, and explored the effects of the geometrical parameters on its bandgap, which can be a stepping stone for designing future EBG structures with desired electromagnetic bandgaps. Later, the performance of a microstrip patch antenna when its ground plane is replaced by a lattice of the studied EBG units is investigated. This led to a noticeable bandwidth and gain enhancement, which motivated me to perform a parameter study to seek further bandwidth improvement. No restriction was placed on the range of parameters, and wider band antennas were observed when parameters fell outside the band gap requirements. Furthermore, I developed methods and designs that can be used to reduce the antenna size and weight by applying some structural modifications. I introduced two antennas, which I named "the puck antenna" and "suspended EBG-backed antenna". The presented simulation results describe the performance of these antennas. The use of an EBG structure as the ground plane of a microstrip patch antenna is shown here to enhance the gain of the antenna. This motivated me to look for further gain enhancement by placing a dielectric cover on top of the antenna, referred to as "superstrate". In the literature, the gain enhancement effect of the superstrate on different antennas including microstrip patch antennas has been confirmed. But using a superstrate on an EBG-backed microstrip patch antenna can be considered as another novelty of this thesis project, which led to further gain enhancement.
Author: Christopher J. Meagher
Publisher:
ISBN:
Category :
Languages : en
Pages : 166
Get Book Here
Book Description
