Novel aperturecoupled microstripline feed for circularly. Microstrip patch antenna is mostly used in modern communication devices over conventional antennas mainly because of their size. Realization of patch antenna with numerical results. This is also the boresight direction for arrays in phased array system toolbox. Ie3d electromagnetic simulation software is used for designing of the rectangular patch antenna using the following design parameters. Design of a rectangular patch antenna with a photonic. The antenna is said to be boresighted when the electromagnetic axis and the mechanical axis are parallel. In the above example, the beamwidth of the antenna pattern is about 60 degree. Antenna, cstms, gain, directivity, return loss, software radio. With the proliferation of personal computers and affordable even free software, antenna modeling has become a popular amateur activity. The patch designs described above were also arrayed using 7 driven elements. For design an antenna i was using the feko software, feko is an electromagnetic simulation software tool for the electromagnetic field analysis of 3d structures. The width of the main lobe or main beam spanning a 3db difference in gain.
This design and simulation has been carried out using antenna simulation software. The overview of a patch antenna is given in the initial section which is followed by the design procedure. This project shows how vss can be used to model and analyze phased arrays. View antenna display, showing the wires making up the model of the fiveelement beam, with currents and 2d slice superimposed to show orientation. Theoretical methodologies for patch antenna design, and a description of the em modeling software, are given in the references but cannot be repeated here due to space limitations. Hf dipole antenna this antenna software will help you design a simple wire dipole antennas for 1 30 mhz.
The ku leuven adcs is an autonomous, highly accurate attitude determination and control system for cubesats up to 12u. In order to provide a dynamic response, reconfigurable antennas integrate an inner mechanism such as rf switches, varactors, mechanical actuators or tunable materials that enable the intentional redistribution of the rf. Software used to design microstrip patch antenna hfss is commercial finite element method solver for electromagnetic structures from ansys corp. Hfss stands for high frequency structural simulator. The system is compact and easy to interface in cubesats and large satellites. I used very seldom ie3d so i cant help you in problems about mesh or other software aspects. The first null may appear at an angle off the boresight similar to the 3 db full beamwidth. Comparison of electromagnetic simulation results with. To enable the mechanical reference of the test antenna to be defined optically, a boresight test adapter is used.
Boresight antenna article about boresight antenna by the. With the large number of electromagnetic em simulation software packages available for use. The current hardware and software is able to do the following. A reconfigurable antenna is an antenna capable of modifying its frequency and radiation properties dynamically, in a controlled and reversible manner. The custom algorithms are optimized for accuracy, robustness and low computational cost. Additional benefits of patch antennas is that they are easily fabricated making them cost effective.
The performance of the antenna element, both isolated and in a 4. The angular discrepancy between the electromagnetic axis and the mechanical axis is called the boresight error. Cst offers accurate, efficient computational solutions for electromagnetic design and analysis. Download the latest twoline elements tle for the selected satellites every few minutes acquire and use gps location from the gpsd. Aperturecoupled patch antenna model in hfss showing the 3d model and the. Our solutions are created by providing fullservice integration of ready solutions for datalink and voice communications equipment. Boresight the direction in which you are physically pointing the antenna, with the intention of maximum electromagnetic illumination. A dual band antenna and a microstrip fed patch antenna, used in the communication lab. One patch in the dominant mode radiates in boresight vertical from the antenna plane, which is not your intended direction if i understand correctly. The second group focused on the design and simulation of patch antennas which are widely used in cell phones today with an emphasis on optimization of a 1. To reduce the design cycle time, commercially available cad software packages are utilized.
High bandwidth circularly polarized cp patch antenna. For most antennas the boresight is the axis of symmetry of the antenna. Borsights business is integrated aircraft solutions. A rh circularly polarized patch antenna design for operation at. The ku leuven star tracker offers arc second range pointing accuracy to your cubesat. Check patch antenna pattern, you could have an unbalanced pattern it depends on the. Alternate feed methods a common variation in patch antenna design is the location and routing of the feed, to obtain a desired feedpoint impedance, to control the polarization, or for convenient layout.
Microstrip patch antenna is mostly used in modern communication devices over conventional antennas. Design and analysis of microstrip patch antennas using. Software represents the simulated antenna patterns using colors and distances from the antenna. It contains a set of sensors, including a highly accurate star tracker, 3 reaction wheels and 3 magnetorquers. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. A multilayer microstrip patch antenna subarray design.
Abstract this paper introduces the design of 8x8 patch antenna array with polarization and space diversity for the future fifth generation 5g of cellular networks. Boresight angle is the angle through which a seeker can pick up and successfully engage a target. See all activity categories simulations, visualization, physics. Fdtd antenna simulator is a complete software package for antenna analysis and design using the fdtd method. This invention is about a novel microstrip patch antenna which is capable of operating in two different frequency bands. The results are increasingly approximate beyond the 3 db contour. The commercial software package hphfss has been used to sim ulate the. The star tracker has a builtin baffle to reduce the effect of stray light. The general dependence of directivity and gain on the angles theta, phi is called the radiation. For example, for axialfed dish antennas, the antenna boresight. Enhancement of boresight radiation for leaky wave antenna. The antenna has two main portions, a metal patch at the top and a double sided printedcircuitboard pcb at the bottom and both of them are square. Design, simulation and analysis of a probe feed patch. It is one of the several commercial tools used for antenna design.
Two types of planar antenna, a planar slot and patch antennas, are used for studies as the. Patch antenna design gareth louis shaw a dissertation submitted to the faculty of engineering and the built environment, university of the witwatersrand, johannesburg, in ful. On the other hand, the input return loss of the pc substrate antenna is lower. The word comes from the early military applications of microwaves, when radar was perfected to help shoot stuff down. The software includes application libraries featuring a variety of antenna examples such as a microstrip patch antenna array used as. Series micro strip patch antenna array for wireless. The bottom side of the double sided pcb has a microstrip line. Directional gain vs wavelength comparison between elliptical and rectangular areas for antenna pattern models by using the rectangular model there is a dir ect correlation between the development of gain i n equation 5 and the ideal gain of equation 3. The dualband mimo microstrip patch antenna comprised of four ports where the ground plane is extruded on a substrate having area 125x128 mm 2 and thickness 1.
The antenna provides a broad beam serving a hemispherical coverage. The maximum radiation intensity is supposed to occur at boresight, but nothing works perfectly. This software can not only be used to design but also to find out antenna gain, stacking distance, and standing wave. Microstrip patch radiating elements for circularly. In telecommunications and radar engineering, antenna boresight is the axis of maximum gain maximum radiated power of a directional antenna. Software such as matlab simulates the radiated pattern from a single antenna in units of dbi. Now, the dimensions of patch can be calculated using eqs. Cst simulation software is userfriendly and enables us to choose the most appropriate method for. Using this software, you can design and build your own yagi antenna. Yagi calculator is a free antenna design and analysis software for windows. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces.
The dielectric layer is a few hundred mils thick sitting on top of a thin metallic square ground plane. Enhancing antenna boresight gain using a small metasurface lens. This includes electronic, mechanical, product, and systems design. This is a flat plate together with a telescope that has been. The resonator is designed to block the surface current at the resonant frequency of the two patch. The design, measurements, and computer modeling results are described for two designs. For example, for axialfed dish antennas, the antenna boresight is the axis of symmetry of the parabolic dish, and the antenna radiation pattern the main lobe is. The t shape patch antenna return loss is 10db and gain is 3db and i shape patch antenna. A common antenna type which, in its simplest form, consists of a straight wire cut in the middle so that each half may be connected to one of the two conductors of a transmission line. Micro strip patch directional antennas are an attractive solution for. The aim of the project is to create an open source satellite antenna tracker especially for ham radio satellite communications using easily available components. The proposed antenna can provide an swr bandwidth of over 16. The fundamentals of patch antenna design and performance.