This article presents the analysis and investigation of the effect of loading a horn antenna with a double square loop frequency selective surface (FSS) of finite size. It is fabricated on Rogers RT5870 (lossy) of relative permittivity 2.33, thickness 1.575mm and loss tangent 0.0012. This structure is called a filtering antenna (filtenna). Basically it is applied for filtering and minimizing th...

The feed for reflectarrays and transmitarrays is crucial determining the overall antenna aperture efficiency, gain, power handling. In past, several methods, such as altering horn shape to achieve higher modes, have been employed modify radiation pattern improve these key parameters. However, another approach use gradient index (GRIN) lenses, which offer unprecedented control over can be used s...

Few-moded or over-moded horns are now being proposed for far-IR space receiver systems, e.g. the High Frequency Instrument (HFI) on the ESA PLANCK Surveyor. In such systems individual waveguide modes can couple independently to an overmoded detector (such as a bolometer in an integrating cavity). We consider in detail the case of a cylindrically symmetric configuration consisting of a corrugate...

When designing an antenna system for radiating a transient pulse, it is necessary to have a simple model for each of the competing antennas, in order to make comparisons. Previous work on TEM horns has provided numerical models, however no simple model exists. The purpose of this paper is to provide such a simple model. The model consists of approximating the TEM horn by a continuum of electric...