Overview on Optimization Methods of Rectangular Dielectric Resonator Antenna
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Coplanar Stripline-Fed Wideband Yagi Dipole Antenna with Filtering-Radiating Performance
electronics Article Coplanar Stripline-Fed Wideband Yagi Dipole Antenna with Filtering-Radiating Performance Yong Chen 1, Gege Lu 2, Shiyan Wang 2 and Jianpeng Wang 2,* 1 School of Physics and Electronic Electrical Engineering, Huaiyin Normal University, Huaian 223300, China; [email protected] 2 Ministerial Key Laboratory of JGMT, Nanjing University of Science and Technology, Nanjing 210094, China; [email protected] (G.L.); [email protected] (S.W.) * Correspondence: [email protected] Received: 6 July 2020; Accepted: 4 August 2020; Published: 6 August 2020 Abstract: In this article, a wideband filtering-radiating Yagi dipole antenna with the coplanar stripline (CPS) excitation form is investigated, designed, and fabricated. By introducing an open-circuited half-wavelength resonator between the CPS structure and dipole, the gain selectivity has been improved and the operating bandwidth is simultaneously enhanced. Then, the intrinsic filtering-radiating performance of Yagi antenna is studied. By implementing a reflector on initial structure, it is observed that two radiation nulls appear at both lower and upper gain passband edges, respectively. Moreover, in order to improve the selectivity in the upper stopband, a pair of U-shaped resonators are employed and coupled to CPS directly. As such, the antenna design is finally completed with expected characteristics. To verify the feasibility of the proposed scheme, a filtering Yagi antenna prototype with a wide bandwidth covering from 3.64 GHz to 4.38 GHz is designed, fabricated, and measured. Both simulated and measured results are found to be in good agreement, thus demonstrating that the presented antenna has the performances of high frequency selectivity and stable in-band gain. -
Radiation Pattern of Yagi-Uda Antenna Using Usrp on Gnu Radio Platform
IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 RADIATION PATTERN OF YAGI-UDA ANTENNA USING USRP ON GNU RADIO PLATFORM Sreethivya1 M, Dhanya.M.G2, Nimisha.C3, Gandhiraj.R4, Soman.K.P5 1M.Tech Student, Department of CEN, Amrita Vishwa Vidyapeetham, Tamilnadu, India 2M.Tech Student, Department of CEN, Amrita Vishwa Vidyapeetham, Tamilnadu, India 3M.Tech Student, Department of CEN, Amrita Vishwa Vidyapeetham, Tamilnadu, India 4Assistant Professor, Department of ECE, Amrita Vishwa Vidyapeetham, Tamilnadu, India 5Head of Department, Department of CEN, Amrita Vishwa Vidyapeetham, Tamilnadu, India Abstract In this paper we are planning to realize radiation pattern of a Unidirectional Yagi-Uda antenna using USRP2 which is connected with GNU Radio. Our basic approach is to get radiation pattern for H-plane structured Yagi-Uda antenna at different angles (0-360). The proposed method is of low cost and easy to implement with two USRP, two PC and a Yagi-Uda antenna. The platform which we have used for getting radiation pattern values is GNU Radio which is open source software.Yagi-Uda antenna is used for long distance communication since it has good directivity. It is designed with three pairs of oscillator, directors and active transducer. Oscillator is connected to the voltage feeder and active transducer incapacitates the wave from different sides of antenna. Keywords: Yagi-Uda antenna, GNU Radio, Radiation pattern, USRP2, Folded Dipole antenna. -----------------------------------------------------------------------***----------------------------------------------------------------------- 1. INTRODUCTION directors a yagi has, greater the forward gain. We have used a single director along with a reflector and a driven element. In this paper we present radiation pattern of a unidirectional Yagi [2] antenna. -
Chapter 5 the Microstrip Antenna
CHAPTER 5 THE MICROSTRIP ANTENNA 5.1 Introduction Applications that require low-profile, light weight, easily manufactured, inexpensive, conformable antennas often use some form of a microstrip radiator. The microstrip antenna (MSA) is a resonant structure that consists of a dielectric substrate sandwiched between a metallic conducting patch and a ground plane. The MSA is commonly excited using a microstrip edge feed or a coaxial probe. The canonical forms of the MSA are the rectangular and circular patch MSAs. The rectangular patch antenna in Figure 5.1 is fed using a microstrip edge feed and the circular patch antenna is fed using a coaxial probe. (a) (b) Coaxial Feed Microstrip Feed Figure 5.1. (a) A rectangular patch microstrip antenna fed with a microstrip edge feed. (b) A circular patch microstrip antenna fed with a coaxial probe feed. The patch shapes in Figure 5.1 are symmetric and their radiation is easy to model. However, application specific patch shapes are often used to optimize certain aspects of MSA performance. 154 The earliest work on the MSA was performed in the 1950s by Gutton and Baissinot in France and Deschamps in the United States. [1] Demand for low-profile antennas increased in the 1970s, and interest in the MSA was renewed. Notably, Munson obtained the original patent on the MSA, and Howell published the first experimental data involving circular and rectangular patch MSA characteristics. [1] Today the MSA is widely used in practice due to its low profile, light weight, cheap manufacturing costs, and potential conformability. [2] A number of methods are used to model the performance of the MSA. -
Design and Application of a New Planar Balun
DESIGN AND APPLICATION OF A NEW PLANAR BALUN Younes Mohamed Thesis Prepared for the Degree of MASTER OF SCIENCE UNIVERSITY OF NORTH TEXAS May 2014 APPROVED: Shengli Fu, Major Professor and Interim Chair of the Department of Electrical Engineering Hualiang Zhang, Co-Major Professor Hyoung Soo Kim, Committee Member Costas Tsatsoulis, Dean of the College of Engineering Mark Wardell, Dean of the Toulouse Graduate School Mohamed, Younes. Design and Application of a New Planar Balun. Master of Science (Electrical Engineering), May 2014, 41 pp., 2 tables, 29 figures, references, 21 titles. The baluns are the key components in balanced circuits such balanced mixers, frequency multipliers, push–pull amplifiers, and antennas. Most of these applications have become more integrated which demands the baluns to be in compact size and low cost. In this thesis, a new approach about the design of planar balun is presented where the 4-port symmetrical network with one port terminated by open circuit is first analyzed by using even- and odd-mode excitations. With full design equations, the proposed balun presents perfect balanced output and good input matching and the measurement results make a good agreement with the simulations. Second, Yagi-Uda antenna is also introduced as an entry to fully understand the quasi-Yagi antenna. Both of the antennas have the same design requirements and present the radiation properties. The arrangement of the antenna’s elements and the end-fire radiation property of the antenna have been presented. Finally, the quasi-Yagi antenna is used as an application of the balun where the proposed balun is employed to feed a quasi-Yagi antenna. -
Low-Profile Wideband Antennas Based on Tightly Coupled Dipole
Low-Profile Wideband Antennas Based on Tightly Coupled Dipole and Patch Elements Dissertation Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Erdinc Irci, B.S., M.S. Graduate Program in Electrical and Computer Engineering The Ohio State University 2011 Dissertation Committee: John L. Volakis, Advisor Kubilay Sertel, Co-advisor Robert J. Burkholder Fernando L. Teixeira c Copyright by Erdinc Irci 2011 Abstract There is strong interest to combine many antenna functionalities within a single, wideband aperture. However, size restrictions and conformal installation requirements are major obstacles to this goal (in terms of gain and bandwidth). Of particular importance is bandwidth; which, as is well known, decreases when the antenna is placed closer to the ground plane. Hence, recent efforts on EBG and AMC ground planes were aimed at mitigating this deterioration for low-profile antennas. In this dissertation, we propose a new class of tightly coupled arrays (TCAs) which exhibit substantially broader bandwidth than a single patch antenna of the same size. The enhancement is due to the cancellation of the ground plane inductance by the capacitance of the TCA aperture. This concept of reactive impedance cancellation was motivated by the ultrawideband (UWB) current sheet array (CSA) introduced by Munk in 2003. We demonstrate that as broad as 7:1 UWB operation can be achieved for an aperture as thin as λ/17 at the lowest frequency. This is a 40% larger wideband performance and 35% thinner profile as compared to the CSA. Much of the dissertation’s focus is on adapting the conformal TCA concept to small and very low-profile finite arrays. -
Design and Analysis of Microstrip Patch Antenna Arrays
Design and Analysis of Microstrip Patch Antenna Arrays Ahmed Fatthi Alsager This thesis comprises 30 ECTS credits and is a compulsory part in the Master of Science with a Major in Electrical Engineering– Communication and Signal processing. Thesis No. 1/2011 Design and Analysis of Microstrip Patch Antenna Arrays Ahmed Fatthi Alsager, [email protected] Master thesis Subject Category: Electrical Engineering– Communication and Signal processing University College of Borås School of Engineering SE‐501 90 BORÅS Telephone +46 033 435 4640 Examiner: Samir Al‐mulla, Samir.al‐[email protected] Supervisor: Samir Al‐mulla Supervisor, address: University College of Borås SE‐501 90 BORÅS Date: 2011 January Keywords: Antenna, Microstrip Antenna, Array 2 To My Parents 3 ACKNOWLEGEMENTS I would like to express my sincere gratitude to the School of Engineering in the University of Borås for the effective contribution in carrying out this thesis. My deepest appreciation is due to my teacher and supervisor Dr. Samir Al-Mulla. I would like also to thank Mr. Tomas Södergren for the assistance and support he offered to me. I would like to mention the significant help I have got from: Holders Technology Cogra Pro AB Technical Research Institute of Sweden SP I am very grateful to them for supplying the materials, manufacturing the antennas, and testing them. My heartiest thanks and deepest appreciation is due to my parents, my wife, and my brothers and sisters for standing beside me, encouraging and supporting me all the time I have been working on this thesis. Thanks to all those who assisted me in all terms and helped me to bring out this work. -
Evaluation of an Electronically Switched Directional Antenna for Real-World Low-Power Wireless Networks
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Swedish Institute of Computer Science Publications Database Evaluation of an Electronically Switched Directional Antenna for Real-world Low-power Wireless Networks Erik Ostr¨ om,¨ Luca Mottola, Thiemo Voigt Swedish Institute of Computer Science (SICS), Kista, Sweden Abstract. We present the real-world evaluation of SPIDA, an electronically swit- ched directional antenna. Compared to most existing work in the field, SPIDA is practical as well as inexpensive. We interface SPIDA with an off-the-shelf sensor node which provides us with a fully working real-world prototype. We assess the performance of our prototype by comparing the behavior of SPIDA against tradi- tional omni-directional antennas. Our results demonstrate that the SPIDA proto- type concentrates the radiated power only in given directions, thus enabling in- creased communication range at no additional energy cost. In addition, compared to the other antennas we consider, we observe more stable link performance and better correspondence between the link performance and common link quality estimators. 1 Introduction The use of external antennas is a common design choice in many deployments of low- power wireless networks [13]. Indeed, an external antenna often features higher gains compared to the antennas found aboard mainstream devices, enabling increased relia- bility in communication at no additional energy cost. To implement such design, re- searchers and domain-experts have hitherto borrowed the required technology from WiFi networks [10, 22]. This holds both w.r.t. scenarios requiring omni-directional communication [22], and where the application at hand allows directional communica- tion [10]. -
G9C01 (A) Which of the Following Would Increase the Bandwidth of a Yagi Antenna? A
Section 5.2 G9C01 (A) Which of the following would increase the bandwidth of a Yagi antenna? A. Larger-diameter elements B. Closer element spacing C. Loading coils in series with the element D. Tapered-diameter elements ~~ G9C02 (B) What is the approximate length of the driven element of a Yagi antenna? A. 1/4 wavelength B. 1/2 wavelength C. 3/4 wavelength D. 1 wavelength ~~ G9C03 (A) How do the lengths of a three-element Yagi reflector and director compare to that of the driven element? A. The reflector is longer, and the director is shorter B. The reflector is shorter, and the director is longer C. They are all the same length D. Relative length depends on the frequency of operation ~~ G9C05 (A) How does increasing boom length and adding directors affect a Yagi antenna? A. Gain increases B. Beamwidth increases C. Front-to-back ratio decreases D. Front-to-side ratio decreases ~~ G9C06 (D) What configuration of the loops of a two-element quad antenna must be used for the antenna to operate as a beam antenna, assuming one of the elements is used as a reflector? A. The driven element must be fed with a balun transformer B. There must be an open circuit in the driven element at the point opposite the feed point C. The reflector element must be approximately 5 percent shorter than the driven element D. The reflector element must be approximately 5 percent longer than the driven element ~~ G9C07 (C) What does “front-to-back ratio” mean in reference to a Yagi antenna? A. -
Design & Fabrication of Rectangular Microstrip Patch Antenna for WLAN
et International Journal on Emerging Technologies (Special Issue NCETST-2017) 8(1): 11-15(2017) (Published by Research Trend, Website: www.researchtrend.net ) ISSN No. (Print) : 0975-8364 ISSN No. (Online) : 2249-3255 Design & Fabrication of Rectangular Microstrip Patch Antenna for WLAN using Symmetrical slots Mudit Gupta, Pramod Kumar Morya and Satyajit Das Department of Electronics & Communication, Amrapali Group of Institute, Shiksha Nagar, Haldwani, (Uttarakhand), India ABSTRACT: This paper presents the symmetrical rectangular slotted microstrip patch antenna. The proposed antenna is simulated with the help of HFSS. The aim of this paper is to design and fabricate the Rectangular Microstrip Antenna and study the effect of antenna dimensions Length (L) , Width (W) and substrate parameters relative dielectric constant (εr), substrate thickness on power, vswr, return loss, impedance, admittance parameters. Low dielectric constant substrates are generally preferred for maximum radiation. Conducting patch can take any of the shape but rectangular and circular configurations are the most commonly used configuration. The other configurations are more complex to analyze and require heavy numerical computations. The length of the antenna is nearly half wavelength in the dielectric; it is a very critical parameter, which governs or control the resonant frequency of patch antenna. In the view of design, selection of patch width and length are the major parameters along with feed line depth. The desired microstrip patch antenna design is initially simulated by using HFSS simulator and patch antenna is realized as per design requirements. Keywords: Compact, Rectangular, WLAN, HFSS, Coaxial feed resonance frequency, gain are changed which may I. INTRODUCTION seriously degrade or upgrade the system performance. -
Transmission Lines, the Most Fundamental Passive Component, Exhibit High Losses in the Millimetre and Sub- Millimetre Wave Regime
Aghamoradi, Fatemeh (2012) The development of high quality passive components for sub-millimetre wave applications. PhD thesis. http://theses.gla.ac.uk/3214/ Copyright and moral rights for this thesis are retained by the Author A copy can be downloaded for personal non-commercial research or study, without prior permission or charge This thesis cannot be reproduced or quoted extensively from without first obtaining permission in writing from the Author The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the Author When referring to this work, full bibliographic details including the author, title, awarding institution and date of the thesis must be given Glasgow Theses Service http://theses.gla.ac.uk/ [email protected] THE DEVELOPMENT OF HIGH QUALITY PASSIVE COMPONENTS FOR SUB-MILLIMETRE WAVE APPLICATIONS A THESIS SUBMITTED TO THE DEPARTMENT OF ELECTRONICS AND ELECTRICAL ENGINEERING SCHOOL OF ENGINEERING UNIVERSITY OF GLASGOW IN FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY By Fatemeh Aghamoradi November 2011 © Fatemeh Aghamoradi 2011 All Rights Reserved Abstract Advances in transistors with cut-off frequencies >400GHz have fuelled interest in security, imaging and telecommunications applications operating well above 100GHz. However, further development of passive networks has become vital in developing such systems, as traditional coplanar waveguide (CPW) transmission lines, the most fundamental passive component, exhibit high losses in the millimetre and sub- millimetre wave regime. This work investigates novel, practical, low loss, transmission lines for frequencies above 100GHz and high-Q passive components composed of these lines. -
Design of Microstrip Antenna for Cognitive Radio Applications
ISSN XXXX XXXX © 2017 IJESC Research Article Volume 7 Issue No.4 Design of Microstrip Antenna for Cognitive Radio Applications P.Balaji1, K.Gowdham2, J.Keerthiseelan3, B.Philbert4, K.Thirumalaivasan5 Department of ECE Achariya College of Engineering Technology, Puducherry, India Abstract: Cognitive radio (CR) technology is a key which provides the capability to share the wireless channel with the licensed users in an opportunistic way. CR is foreseen to be able to provide the high bandwidth to mobile users via heterogeneous wireless architectures and dynamic spectrum access techniques. The proposed Microstrip antenna is capable of switching between wide operating bands of 4GHz – 8GHz(C band). The antenna would be fabricated using FR4 substrate are capable of the antenna is simulated using electromatic software, IE3D Ke ywor ds : Cognitive radio – Spectrum analysis design of microstrip antenna – cost effective 1. INTRODUCTION These are basically UWB antennas, but have the ability to selectively induce frequency notches in the bands of primary The rectangular microstrip antenna is a basic antenna element services, thus preventing any interference to them and giving the being a rectangular strip conductor on a thin dielectric substrate UWB transmitters used by the secondary users the chance to backed by a ground plane. Considering the patch as a perfect increase their power, and hence to achieve long-distance conductor, the electric field on the surface of the conductor is communication. In Section 5, we investigate the design of considered as zero. Though the patch is actually open circuited antennas for overlay CR. In this scheme, an antenna should be at the edges, due to the small thickness of the substrate compared able to monitor the spectrum (sensing) and communicate over a to the wavelength at the operating frequency chosen white space (communication). -
Broadband Microstrip Antenna for 5G Wireless Systems Operating at 28 Ghz
electronics Article Broadband Microstrip Antenna for 5G Wireless Systems Operating at 28 GHz Rafal Przesmycki *, Marek Bugaj and Leszek Nowosielski Department of Electronics, Military University of Technology, 00-908 Warsaw, Poland; [email protected] (M.B.); [email protected] (L.N.) * Correspondence: [email protected]; Tel.: +48-504-059-739 Abstract: Communication systems have been driven towards the fifth generation (5G) due to the demands of compact, high speed, and large bandwidth systems. These types of radio communication systems require new and more efficient antenna designs. This article presents a new design solution of a broadband microstrip antenna intended for use in 5G systems. The proposed antenna has a central operating frequency of 28 GHz and can be used in the LMDS (local multipoint distribution service) frequency band. The dimensions of the antenna and its parameters have been calculated, simulated, and optimized using the FEKO software. The antenna has a compact structure with dimensions (6.2 × 8.4 × 1.57) mm. Rogers RT Duroid 5880 material was used as a substrate for the antenna construction, which has a dielectric coefficient of 2.2 and a thickness of 1.57 mm. The antenna described in the article is characterized by a low reflection coefficient of −22.51 dB, a high energy gain value of 3.6 dBi, a wide operating band of 5.57 GHz (19.89%), and high energy efficiency. Keywords: antenna; microstrip antenna; antenna 5G; 28 GHz band; 5G wireless system; broad- band antenna 1. Introduction The growing demand for telecommunications services is stimulating the development Citation: Przesmycki, R.; Bugaj, M.; of new call-handling technologies.