The db420 series antennas are designed for mounting on top of a tower or wooden pole. However all antennas are scaleable by nature, so if you design a 4 element hitech yagi on 2 meters with 12 db gain, it translates directly into a 12db gain 4 element yagi on 20 meters. The antenna is suitable for mounting to the top, or on the side of a tower. Commscope andrew solutions db420b omni, exposed dipole antenna, 450470 mhz, 360 horizontal beamwidth, fixed electrical tilt. The farfield radiation pattern can also be calculated from the antenna shape by computer programs such as nec. Obtain the vector frequency response of arbitrary 3d antenna structures. Radiation patterns obtained with the antenna side mounted on an 18 tower are shown in figure 4. Hf dipole antenna this antenna software will help you design a simple wire dipole antennas for 1 30 mhz. The main category is antenna analysis software that is about software, antenna analysis software, for ham radio operators and hams. Offset pattern db420l has all dual dipoles mounted in line, collinearly, on the mast. This software can not only be used to design but also to find out antenna gain, stacking distance, and standing wave ratio swr. Antenna toolbox provides functions and apps for the design, analysis, and visualization of antenna elements and arrays.
We begin with a glossary of basic definitions and then progress through a discussion of some common antenna types and their properties. Duals and quads two or four antennas can operate on the same mast with any combination of circular and elliptical patterns, each with a separate feed line. The db420 series antennas can be mounted to achieve pattern. Download antenna radiation diagram plotter for free. The data sheet on the db420 uhf dipole array repeater builder. Antenna radiation patterns can take many interesting shapes, particularly when presented graphically in their realworld three dimensional state. With modeling you can determine the pattern, feed point impedance and even the swr of your antenna system before cutting one piece of wire or one tube of aluminum. The focus is on many of the various antennas that might be encountered in a wireless lan system. This perfect antenna is suppose to go up on the repeater tower soon.
This antenna software module also helps you validate existing antenna designs and study a plethora of antenna design issues, including. Introduction useful software has to work exactly as someone wants, so the authors group decided to develop its own minisuite of software tools for antenna applications 1. For best operation, it is recommended that the bottom dipole be above the tower top. Commscope db420b andrew omni exposed dipole antenna. Sonnet provides precise sparameters, current density and farfield radiation pattern both rh and lh circular polarizations are shown for the xaxis cut. The authors presentations at the 20 dayton hamvention may be downloaded as pdf files by clicking the following links. Putting up a repeater and wanted to get feedback on if cost was not an issue what the best uhf 440 repeater antenna would be. It contains supplementary information including references and tutorials. Commscope db420b omni, exposed dipole antenna, 450470 mhz, 360 horizontal beamwidth, fixed electrical tilt broad response moisture resistant rugged, reliable design included parts db365os. With the proliferation of personal computers and affordable even free software, antenna modeling has become a popular amateur activity.
The farfield pattern of an antenna may be determined experimentally at an antenna range, or alternatively, the nearfield pattern may be found using a nearfield scanner, and the radiation pattern deduced from it by computation. Licensed professional engineering firm, specializing in antennas and radio communications, intelligentsmart antenna development. Leading supplier of wireless communications infrastructure and mobile products. The antenna farm commscope db420b manufacturer commscope product description 450470 broadband nmale product narrative 8bay, dual exposed dipole. Antenna descriptions and pattern plots are easily saved and recalled for future analysis. This link is listed in our web site directory since saturday apr 19 2003, and till today ve3sqb antenna programs has been followed for a total of 12195 times. View antenna display, showing the wires making up the model of the fiveelement beam, with currents and 2d slice superimposed to show orientation. Cst offers a wide range of em simulation software to address design challenges across the electromagnetic spectrum, from static and low frequency to microwave and rf. Novosibirsk, russia december 27, 2019 center of telecommunication technologies is proud to announce immediate availability of antenna pattern editor 1. Education software downloads yagi designer by goforth laboratories and many more programs are available for instant and free download. The db420 series antennas are high gain, light weight, heavy duty antennas for.
Three source files plain text can be loaded and plotted at the same time. Included wit the antenna is a db356os pipe mount lit for 1. Pipe mounting kit that consists of two clamps for mounti 0. The following material supports the book antenna modeling for beginners. A rh circularly polarized patch antenna design for operation at 2. Cst beginners tutorial for microwave antenna design youtube. Commscopeandrew db420a andrew base station antennas. Due to dimensions of this item, it can only be shipped via truck, resulting in higher freight costs than estimated at checkout. As a last thought, if you have 20 ft vertical to mount a db420 antenna, consider mounting one or two db404 antennas on a 20 ft pipe.
Order db408 for omni pattern, db408l for offset pattern, db408d for dual antennas with omni patterns and db408dl for dual antennas with offset patterns. An omni pattern is achieved when the four, dual dipole assem blies on the. Side mounting of the antenna requires the use of a db5012 side mount kit. We have partnered with arie voors, the author of the very popular antenna simulator called 4nec2. The db420 antenna is the rolls royce of uhf antennas. Use export to view your antenna in matlab workspace or matlab script. Its a big honker and can be a booger installing on a foot tower, but it will last 2030 years. Antenna design and development, rf design firm, manufacturer of smart antennas and custom antennas from 100 khz to 26 ghz. Antenna radiation diagram plotter polar plots of measured em emission, with a proper radial axis scaling and span. The radiation falls to zero along the axis of the rf antenna as might be expected. Is there any software that enables me view antenna radiation patterns in 3d by simply using the information in say the. So anything design advances done on 2 meters or above are completely valid on the hf bands.
I can run it on mappingcoverage software freely available on the net for. You can design standalone antennas and build arrays of antennas using either predefined elements with parameterized geometry or arbitrary planar elements. Antenna test lab presents the following software for viewing your measured 3d antenna testing chamber pattern results. Solved software for viewing 3d antenna radiation pattern. See the pattern and antenna currents on the same color 3d display as the antenna. The antenna pattern must give the antenna gain as a function of the offaxis angle. Im fairly new to radios, i know that the higher the gain on an antenna, the. Antenna pattern editor software free download rf cafe. In the case of a yagi antenna with a gain of 14 dbd the yagi has 14 db more gain as a dipole. Multiple patterns can be superimposed on a single graph for comparison.
The antenna gain must be defined for all offaxis angles between 0 and 180 degrees. Keywords floss, antenna, radiation pattern, virtual reality. Circular pattern db420 has dual dipoles positioned at 90 degree angles from each other. 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 best pcb antenna design software eases antenna. Yagi calculator is a free antenna design and analysis software for windows. Manually change the antenna properties using the antenna properties tab. Antenna magus is a software tool to help accelerate the antenna design and modelling process. Shop by category antennas base stationomni dipole 406512 mhz. The software also assists with pcb antenna design by displaying metaldielectric layers, feeds, and connector types. Two db404 antennas are combined to form the db408 antenna with its 4 stack collinear array of dual dipoles. The radiation pattern polar diagram for a half wave dipole antenna shows that the direction of maximum radiation or sensitivity is at right angles to the axis of the rf antenna. It is capable of working with many antennas at the same time. Understanding antenna specifications and operation.
Download yagi designer software for windows for free. This antenna design grew out of my attempts to build an indoor hdtv antenna using fractal patterns after i had watched a tv show and had read a magazine article on the use of fractal patterns in cell phone antennas, my goal was to design an ante. It is important to pay attention to the gain when using commercially produced antennas and antenna patterns. Each 404 has 3 db less gain, but the smaller size of each 404 will yield you an extra 10 db of isolation. For example, the ubiquiti sector antenna am5g19120 has its antenna properties defined as seen in this link. Using this software, you can design and build your own yagi antenna.
Qantenna is able to show antennas in a 3d plot, and calculate its radiattion pattern. The db420 series antennas are high gain, light weight, heavy duty antennas for use in station applications where an omnidirectional or an elliptical radiation. I see allot of talk about the db420, but when andrews sold the antenna line the ham specific model 440450 mhz was dropped. Radio mobile rf propagation simulation software view antenna. For questions about how to use eznec in support of the books. The elements of these dual antennas can be aligned to produce either an omni or elliptical pattern, each without regard to other antennas on the mast. Andrew db420b omnidirectional, exposed dipole antenna operates in the 450 470 mhz frequency range. Antenna modeling for beginners american radio relay league. Commscope db420b omni, exposed dipole antenna, 450470. About ve3sqb antenna programs the resource is currently listed in in a single category. Obtain the radiation pattern of any antenna over a frequency range. Antenna toolbox uses the method of moments mom to compute. The main idea embedded in the program is to provide the user with the opportunity to quickly create an antenna pattern file using various methods.