The spr230 antenna is designed using log periodic principles to achieve broadband performance while mounting over earth. Y10uflte classic design yagi antenna with new unique 4glte signal rejection modification. A log periodic antenna lp, also known as a log periodic array or log periodic aerial, is a multielement, directional antenna designed to operate over a wide band of frequencies. In figure 1, a plot of a planar log periodic spiral antenna is shown. The main category is antenna design calculators that is about antenna design calculators. Introduction in this tutorial, a dipole antenna will be constructed and analyzed using the hfss simulation software by ansoft. In essence, log periodic arrays are a group of dipole antennas of varying sizes strung together and fed alternately through a common transmission line. Ansoft hfss can be used to calculate parameters such as sparameters, resonant frequency, and fields4. A more formal name is logarithmic periodic dipole array lpda. The antenna feeding structure consists of two coaxial cables, in order to realize an infinite balun. The log periodic antenna is used in a number of applications.
Analysis and design of the logperiodic dipole antenna by carrel, robert louis. Change the drawing plane back from zx to xy draw a box and fill in the values as shown below. The logperiodic antenna is the most effective and efficient single feedline, multiband antenna available today our design engineering is textbook and common sense based with adherence to the laws of physics and what we, the designers, would want to use as a part of our own system. Pess modern college of engineering, shivajinagar, pune5. This antenna is suitable on mobile transceiver antennas. Several varieties of log periodic antenna systems exist, such as the zigzag, planar, trapezoidal, slot, v, and the dipole. However, for commercial purpose and to tune over a range of frequencies, we need to have another antenna known as the logperiodic antenna. Planar invertedf antenna bandwidth observed 700 and 300 mhz for 2. The logperiodic antenna is used for linearly polarized electromagnetic interference emi measurements over a frequency range of 200 mhz. In hfss desktop, click the on the standard toolbar, or select the menu item file new.
Pdf design and analysis of five element microstrip logperiodic. Our designed antenna was constructed using aluminum for the further investigation. These simple formulas give an insight into the log periodic antenna theory. The acronym stands for highfrequency structure simulator. Antenna design the concept of logperiodic wireantennas is applied to microstrip printed technology, to get the antenna layout shown in figure 1. Design of microstrip log periodic antenna for wireless. Hfsss microstrip patch antenna design part1basics of antenna design using hfss software. A printed logperiodic dipole array lpda is presented, operating over the c, x and ku bands. In this paper the analysis, design, and simulation of log periodic dipole antenna lpda is presented, which is suitable and particular for mobile communication bands from 1150 mhz up to 2450 mhz. In order to achieve the miniaturized logperiodic dipole antenna lpda, this paper introduces the 2nditeration tree fractal dipoles as the basic structural elements of.
Design of planar trapezoidal toothed log periodic antenna using hfss. This link is listed in our web site directory since sunday oct 28 2007, and till today log periodic antenna design has been followed for a total of 33323. The creative design clp52n log periodic antenna described here is a popular antenna in solar radio spectrometers such as those. Hfss is a commercial finite element method solver for electromagnetic structures from ansys.
Fullwave em solver hfss high frequency structure simulator is used for. As a standard, the antenna is designed for horizontally polarized base station use but by means of an adapter, vertical polarization is also possible. Hf broadband vertically polarised log periodic antenna models. Pdf this paper describes the design of the log periodically scaled microstrip patch antenna.
Analysis and design of the logperiodic dipole antenna. The gain and vswr are superior to current commercial designs. If a new project and new design are not already opened, then. As we are dealing with an integer number of elements. The log periodic dipole array, lpda is generally able to operate over a frequency range of around 2. Online calculator lpda logarithmic periodic dipole antenna.
The first log periodic antenna article to be published in amateur literature appeared in november 1959 qst, and was written by carl t. After completing this tutorial, you will be able to calculate the parameters of an antenna and decide which antenna suits for which type of application and why. Rectaangular microstrip patch antenna for wireless. The array dipoles are fed in an alternate way with two microstrip lines printed on the opposite sides of a dielectric slab as in figure 2a. The design is so simple that in retrospect it is remarkable that it was not invented earlier.
And while there are software programs such as ie3d and hfss than can analyze a. This paper presents a planar microstrip array designed by the logperiodic technique for wideband operation in. In antennas design, the usual fractal structure is koch fractal, tree fractal 14, hilbert fractal 15, etc. Design planar invertedf antenna, it can be operated in resonating frequency sband range. Antenna design the concept of log periodic wireantennas is applied to microstrip printed technology, to get the antenna layout shown in figure 1. Log periodic toothed design parameters substrate thickness substrate dimension y substrate dimension x. A new project based on ga and high frequency simulation software hfss is proposed to perform. A logperiodic antenna is that whose impedance is a logarithamically periodic function of frequency. The main goal of this paper is to apply one of fractal structures, i. A log periodic antenna is an array of dipoles with mathematically related lengths and spacings.
Probe feed patch antenna2 probe feed patch antenna getting started click the microsoft start button, select all programsansofthfss 12hfss 12 or double click on the hfss 12 icon on the windows desktop adding a project and design to insert a design into an open project. Design of log periodic antenna in hfss i am designing a log periodic dipole array antenna not planar with 1 to 3 ghz operating frequency vswr 10 dbi actually i am having the problem of feeding the antenna. In this paper, design log periodic dipole array antenna using two side. Size reduction of printed logperiodic dipole array antenna. Hfss is one of several commercial tools used for antenna design, and the design of complex radio frequency electronic circuit elements including filters, transmission lines, and packaging. The most common form of logperiodic antenna is the logperiodic dipole array or lpda, the lpda consists of a number of. The main category is log periodic antenna projects that is about log periodic antennas. Design of a logperiodic aperturefed microstrip antenna.
Log periodic antennas wide band, high gain, low vswr small size, light weight, easy assembly cd model clp5x series is a high gain, wide band vhf and uhf log periodic type beam antenna. Design and implementation of log periodic antenna name of the students. Dec 06, 2016 log periodic antennas can be used in this application, 4 other applications. Still, despite its simplicity, the log periodic antenna remains a subject of considerable study even. At frequencies below 20 mhz, the antenna provides a broad, horizontally polarized beam directed at the zenith to accommodate short range skywave circuits. Hfsss microstrip patch antenna design part1basics of. This video demonstrates how to create the geometry of the dipole antenna. Like the yagi antenna it exhibits forward gain and has a high front to back ratio, but the lpda is able to operate over a much wider bandwidth and will have a lower gain for an equivalent number of elements.
The narrow bandwidth of a microstrip antenna is one of the important features that restricts its wide usage, although it possesses many advantages such as low profile, light weight, etc. The antenna consists of two conical conductive objects, nearly touching at their vertices. A logperiodic antenna lp, also known as a logperiodic array or logperiodic aerial, is a multielement, directional antenna designed to operate over a wide band of frequencies. Oct 12, 2018 antenna magus is a software tool to help accelerate the antenna design and modelling process. Port gap width r 1 r 2 a 1 a 2 outer radius r 1 1 1 1 n n n n r a r r v antenna characteristics w directivity polarization bandwidth medium linear wide ref. Ultrawideband log periodic dipole antenna lpda for wireless. The yagiuda antenna is mostly used for domestic purpose. Also looking at these log periodic antenna equations or formulas it is possible to see why the antenna gain its name. It consists of patch elements on one side of a dielectric substate and a planar ground on the other side. Design of planar trapezoidal toothed log periodic antenna. That is, there is a bit of intuition we can give regarding this antenna as in the preceeding paragraphs. The most common form of log periodic antenna is the log periodic dipole array or lpda, the lpda consists of a number of.
The planar spiral antenna of figure 1 will have peak radiation directions into and out of the screen broadside to the plane of the spiral, in both the front and the back. The proposed antenna is designed in electromagnetic simulation software cst studio suite. It also covers new features in ansys hfss for antenna analysis. Because of this, we need to define an airbox around our design. Techniques for analyzing antenna lattice structures. Any one of a class of antennas having a structural geometry such. It has a radiation pattern of omni directional and is 93% efficient and the gain is 5. The design results of the three methods linked with nec are compared. The first logperiodic antenna article to be published in amateur literature appeared in november 1959 qst, and was written by carl t. This antenna has 140 mhz bandwidth, return loss at centre frequency has less than 16. A printed log periodic dipole array lpda is presented, operating over the c, x and ku bands. About log periodic antenna design the resource is currently listed in in 2 categories. Zplots simulation program shows acceptable results and confirm the theoretic basics.
Log periodic antennas are designed to work across a wide range of frequenciesuhf, advantage. Analysis, design, and simulation of a log periodic antenna. Pdf design of a printed logperiodic dipole array for ultra. Various techniques have been used to enhance the bandwidth of this kind of antenna. The beauty of this antenna is the use of single patch which make it easy to fabricate consequently cost of antenna becomes cheaper. Genetic algorithm ga is utilized to design microstrip patch antenna shapes for broad bandwidth. I wish i could say i have a secret design process, but there were many variations and small pieces of metal tape on the early models. The microstrip antenna msa that we have designed can work on. In this paper, biconical antenna design and testing sequence is proposed. It is possible to explain the theory behind the log periodic antenna in. The log periodic antenna is used for linearly polarized electromagnetic interference emi measurements over a frequency range of 200 mhz. Modeling and measuring the creative design clp5 2n log. Structure of patch antenna design in hfss athe 2x2 patch array antenna design is shown in below figure in 3d model. The zigzag pattern construction of log periodic dipole antenna.
The novelty of this antenna structure is a combination of. Logperiodic antennas are designed to work across a wide range of frequenciesuhf, advantage. Hfss treats the space around your design that hasnt been designated as a specific material as pec. Log periodic antennas can be used in this application, 4 other applications. Pdf design and performance analysis of a log periodic dipole. This link is listed in our web site directory since sunday sep 23 2012, and till today log periodic antenna calculator has been followed for a total of 6728 times. Log periodic antenna calculator resource detail the. However, for commercial purpose and to tune over a range of frequencies, we need to have another antenna known as the log periodic antenna. Feb 20, 2016 y10uflte classic design yagi antenna with new unique 4glte signal rejection modification. The simulation and experimental results show that the proposed antenna exhibits.
Department slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The rectangular micro strip patch antenna is analyzed using high frequency structure simulator hfss v 11. In order to achieve the miniaturized logperiodic dipole antenna lpda, this paper introduces the 2nditeration tree fractal dipoles as the basic structural elements of an ultrawideband logperiodic. Model spr230hf log periodic spiral antenna 230 mhz 5 dbi. The design of the log periodic dipole array antenna as shown in figure 1 is somewhat of an empirically successful design. A log periodic antenna is that whose impedance is a logarithamically periodic function of frequency. This paper proposes a printed logperiodic dipole antenna lpda for ultra wide. A broadband highgain bilayer logperiodic dipole array lpda. Antenna magus is a software tool to help accelerate the antenna design and modelling process.
The more directional the pattern the higher the directivity. Modeling and measuring the creative design clp52n log. The logperiodic dipole array lpda consist of an array of dipoles in which there have a. May 04, 2017 hfsss microstrip patch antenna design part1basics of antenna design using hfss software. An lpda design for ultrawideband pulse radiation has. It increases efficiency by helping the engineer to make a more informed choice of antenna element, providing a good starting design tuned to the specifications of the application. The objective is to provide a very thorough introduction to hfss as applied to antenna design, which may be followed stepbystep in hfss with the investment of only a few hours of time.
Mhz with required high gain is designed and then simulated by hfss simulator. The objective is to provide a very thorough introduction to hfss as applied to antenna design, which may be followed stepbystep in. It is possible to explain the theory behind the log periodic antenna in a qualitative basic form. The log periodic antenna is the most effective and efficient single feedline, multiband antenna available today our design engineering is textbook and common sense based with adherence to the laws of physics and what we, the designers, would want to use as a part of our own system. Lpda antenna design structure in hfss simulation43. Hf broadband vertically polarised log periodic antenna nvis.
Any applications where directivity and a wide bandwidth are needed 15. Getting started with hfss v9 for antenna design october, 2003 this getting started training material is intended for new users of hfss. This tutorial is meant to provide the readers a detailed description of the antennas used in communication systems. Set solution type select the menu item hfss solution type choose driven terminal click the ok button analysis.
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