The most common type is a quarterwave monopole where the antenna is approximately 14 of wavelength of radio waves. Radiation pattern of a monopole at a frequency of 75 mhz. To plot 3d field data, use the patterncustom function. What are the units for wavelength and monopole length. I have completed the preliminary stage up to my knowledge and i have some doubts about the measurements and report generation. Choose a web site to get translated content where available and see local events and offers.
There is no standard convention for the coordinate system used to specify the radiation pattern, so the result from one simulation package often cannot not be directly used in another software package. Based on your location, we recommend that you select. You clicked a link that corresponds to this matlab command. The width of the monopole is related to the diameter of an equivalent cylindrical monopole by the equation. Antenna magus is a software tool to help accelerate the antenna design and modelling process. Analysis of the effects derived from installing a vhfuhf monopole at different heights over ground, made with 4nec2. Pdf analysis of a rectangular monopole patch antenna. Monopole and tophat monopole, inverted and coplanar inverted antennas. Radiation pattern of a parabolic reflector and dipole exciter.
Rightclick the polar measurement window to change the properties, zoom in, or. Antenna array analysis with custom radiation pattern. The radiation patterns and input impedance of antennas are sensitive to the parameters that define their shapes. Therefore, for high fidelity pattern analysis, you often need to use a custom radiation pattern obtained from measurements or simulations. Name is the property name and value is the corresponding value. The complex radiation pattern of antenna elements that are isolated or embedded within an array can be applied in the development of beam forming and beam steering algorithms. The polarpattern function allows you to interact with the data as well as perform antenna specific measurements. Mathworks is the leading developer of mathematical computing software for engineers and scientists. Antenna array beam scanning visualization on a map. Antenna array analysis with custom radiation pattern matlab. Create linear antenna array matlab mathworks india.
Since the monopole is located at the center of the ground plane, the feedoffset property of the antenna is not modified. Dipole antenna farfield pattern matlab answers matlab. Create monopole antenna over rectangular ground plane matlab. Vhf monopole antenna at variable height vertical radiation pattern.
This program plots 3d radiation pattern of a dipole antenna. But should you get traditional 2dimensional polar plots or 3dimensional spherical plots. These antennas find uses in mobile communications and internet networks. I need to plot the radiation pattern for a dipole antenna of length llambda2. This matlab function plots the 3d radiation pattern of an antenna magnitude, mage over the specified phi and theta angle vectors. You can add both balanced and unbalanced antennas to the same conformal array. Create a default monopole antenna and calculate the directivity at 75 mhz. Antennas pattern file exchange matlab central mathworks.
Creates a conformal array consisting of two monopoles antenna elements. The monopoletophat object is a tophat monopole antenna mounted over a. Like a dipole antenna, a monopole has an omnidirectional radiation pattern. Visualize radiation pattern from antenna data file. Rightclick the polar measurement window to change the properties, zoom in, or add more data to the plot. A monopole antenna is half of a dipole antenna on top of a conducting ground plane. Dipoles are balanced antennas and are the most fundamental form of antennas. Plot antenna radiation pattern on map matlab pattern mathworks. Antenna toolbox provides radiation patterns for simulating beam forming and beam steering algorithms.
Once you have decided to get your antenna patterned, you are well on your way to new insights into its performance and suitability for your application. This function also allows the user to slice the data and see it. The radiation patterns and input impedance of antennas are sensitive to the. The graphs actually supposed to be a function of theta alone. Design and analyze a quarterwave monopole antenna operating at 400 mhz. Design a receiver site using a dipole antenna at a height of 30 meters. Dipole antennas are used in various applications such as. New diamond antenna for ultra wideband applications. The impedance of a monopole antenna is minimally affected by a finitesized ground plane for ground planes of at least a few wavelengths in size around the monopole. Optimizes a 6element yagiuda antenna for both directivity and 300. You can specify several namevalue pair arguments in any. Use these plots when interactive data visualization or measurement is required. Interactive plot of radiation patterns in polar format.
A standard dipole antenna has an omnidirectional radiation pattern. Dipole antennas are also known as linear wire antennas. This affects the properties of the monopole antennas, particularly the radiation pattern. The radiation pattern is limited to above the ground plane of the antenna. To visualize just 2d polar data use the polarpattern function. However, the radiated power varies with elevation angle, with the radiation dropping off to zero at the zenith of the antenna axis. Then, modify the height and the width of the monopole, and dimensions of the ground plane to be in agreement with the hardware prototype. Monopole antenna design using hfss forum for electronics. Here i have shown simple steps for drawing antenna radiation pattern in originpro 8. Interactive plot of radiation patterns in polar format matlab. Follow 324 views last 30 days vinci on 22 may 2017. Run the command by entering it in the matlab command window. Dipole antennas are used in various applications such as in phased arrays and feeding sources to larger antennas.
This example shows how to visualize a radiation pattern and vector fields from user data. Antennas radiation patterns modeled in matlab can then be exported in external antenna pattern file formats which can be imported into your in this project, we present a matlab based graphical user interface gui approach to control the glowing pattern of a number of lightemitting diodes leds. Create monopole antenna over rectangular ground plane. To specify additional antenna or array elements, add additional element positions in the conformal array. I realise patterncustom is most likely the function which would yield the desired result, yet couldnt quite understand from matlab s library how to use it. 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 monopole object is a monopole antenna mounted over a rectangular ground plane. Its intended to represent the radiation pattern from a dipole for several wave lengths. However, the radiation pattern for the monopole antenna is strongly affected by a finite.