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.
For covering a specified wide circular area with a tilted sectoral beam, this paper proposes compact beam-tilted multimode horns based on coaxial dual-path guides and shaped dielectric-lens onto the horn aperture. We present two design examples with a beam tilted up to 20 degrees for 24 GHz radio-sensor systems. One is constructed with an axially symmetrical structure and also is fed by a bend waveguide,...
This paper proposes novel reflectarray elements with four axial symmetry(including axial and rotational symmetry) for dual-polarization and wideband use. These elements provide reflection phase range of 360° over the wide frequency range by changing their shapes, and also have low cross polarization properties. We design an offset feed reflectarray constructed by the proposed elements in the Ku-band,...
This paper proposes dielectric lens-corrected horn with a coaxial groove. For covering a wider area with keeping a high gain, this paper newly proposes dielectric lens loaded into a horn antenna for wide angle radiation for 24 GHz radar systems. It can improve the lowest gain of the desired area by optimizing both parameters of the dielectric lens and the primary horn.
Aperture antennas for satellite communications and radar systems require covering a desired area with a high gain and a low loss. When the coverage becomes much wider, horns are suitable as such antennas. Previously, we had developed multimode horns with coaxial grooves for a circular coverage [1]. We had also proposed a dielectric-dome antenna achieving a wider illumination area up to ±70° [2]. However,...
This paper proposes an optimization design method to obtain arbitrarily-shaped conductive elements for microstrip reflectarrays. Such arbitrarily-shaped elements are determined by using the genetic algorithm (GA) based on a spectral-domain moment method. The validity of the designed elements is presented by comparing the calculated reflection-phase property for a periodic reflectarray with the measured...
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.