The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A systematic procedure for design of a broadband circularly polarized dielectric resonator antenna (CP DRA) is presented. An important stage of this process is the design of a microstrip branchline coupler that realizes a required excitation of a particular dual-input CP DRA over the frequency range of interest. This excitation is developed to improve the axial ratio, otherwise degraded due to coupling...
In this letter, a computationally feasible technique for dimension scaling of antenna structures is introduced. The proposed methodology is based on inverse surrogate modeling where the geometry parameters of the antenna structure of interest are explicitly related to the operating frequency. The surrogate model is identified based on a few antenna designs optimized for selected reference frequencies...
Reliable yet fast surrogate models are indispensable in the design of contemporary antenna structures. Data-driven models, e.g., based on Gaussian Processes or support-vector regression, offer sufficient flexibility and speed, however, their setup cost is large and grows very quickly with the dimensionality of the design space. In this paper, we propose cost-efficient modeling of antenna structures...
In this work, we propose a computationally efficient procedure for dimension scaling of antenna structures. The fundamental component of our methodology is an inverse surrogate model that relates geometry parameters of the antenna structure of interest to its operating frequency. The surrogate is constructed using several antenna designs obtained at the level of the coarse-discretization EM simulation...
Multi-objective optimization of a quasi-isotropic dielectric resonator antenna (DRA) is presented. Utilization of variable-fidelity electromagnetic (EM) DRA models, response surface approximations, and response correction techniques, allows us to obtain—at a low computational cost—a set of alternative antenna designs representing the best possible trade-offs between three conflicting objectives: antenna...
Adjustment of geometry parameters and performance optimization of dielectric resonator antennas (DRAs) is a challenging task that requires electromagnetic (EM) simulations. In particular, DRA design automation is problematic due to high computational cost of accurate, high-fidelity EM simulations; specifically, embedding the EM solver directly into the optimization algorithm (e.g., gradient-based)...
We present design of dielectric resonator antenna for the 2.4-to-2.5 GHz band installed on a printed circuit board with lower and upper metal ground. The antenna is directly fed by the coplanar waveguide. One of the objectives reached in the design process is reduction of the noise emitted by the antenna into the printed board. Conceptually it can be done with trough vias connecting the upper and...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.