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.
This paper describes the application of an efficient implicit finite-difference time-domain method (FDTD) based on the locally one-dimensional (LOD) scheme to the analysis of periodic band-gap structures. In particular, the technique of oblique incidence is introduced into the periodic LOD-FDTD method. To maintain a tridiagonal system of linear equations, we newly develop a three-step algorithm consistent...
An equiangular spiral antenna backed by a cavity is investigated using the electric and magnetic fields obtained using Yeepsilas FDTD method. Strip absorbers are placed inside the cavity. Antenna configuration parameters other than the cavity height Hcav are fixed throughout this paper, where the cavity diameter Dcav is chosen to be 120 mm (slightly larger than the antenna diameter of 113 mm). The...
It is well known that a monopole antenna above a ground plane radiates an omni-directional beam around its axis. The height of this monopole can be reduced by using top-loading techniques. One such technique involves attaching a patch to the top of a monopole for use as a microwave antenna. In this case the structure is recognized as a low-profile, center-fed patch antenna. When the antenna height...
An array composed of a pair of inverted F elements above an EBG reflector is constructed and analyzed using the finite-difference time-domain method (FDTDM). The array is characterized by inverted F elements that have an extremely small height above the surface of the EBG reflector (0.03 wavelength). The analysis is performed for two cases (CASE I and CASE II). The two inverted F elements for CASE...
This paper presents a PSP (patch with a ring slot and conducting pins) antenna. Using the FDTD method, the PSP antenna is designed to radiate a linearly polarized conical beam over a wide frequency range. The design is performed in three steps. In the first step, a center-fed patch above a ground plate, referred to as the original patch, is analyzed. It is found that the reactive component of the...
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.