In this article we review the fundamental issues involving the simulation of the radio channel and discuss some of the more challenging simulation topics that are pertinent to the radio channel. Radio and propagation channels The propagation channel, together with the transmit and receive antennas, constitute the radio channel. Figure 1 depicts the propagation and radio channel's place in a rad...

The design, planning and deployment of LMDS (Local Multipoint Distribution Service) systems require a good understanding of radio wave propagation. After a presentation of the different propagation mechanisms , we present the propagation channel characteristics: attenuation, variability and frequency selectivity due to multi-path; the selectivity being defined from wideband parameters such as d...

nature photonics | VOL 5 | FEBRUARY 2011 | www.nature.com/naturephotonics 83 Optical antennas, analogues of microwave and radiowave antennas, are a new concept in physical optics1. They are an enabling technology for manipulating and controlling optical radiation at subwavelength scales2. Optical antennas are the subject of a growing number of scientific studies, and hold promise for enhancing ...

Maxim Dvornikov and Victor B. Semikoz Institute of Physics, University of São Paulo, CP 66318, CEP 05314-970 São Paulo, SP, Brazil Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), 142190 Troitsk, Moscow, Russia Physics Faculty, National Research Tomsk State University, 36 Lenin Avenue, 634050 Tomsk, Russia (Received 30 September 2014; published 2 March...

Maxim Dvornikov Institute of Physics, University of São Paulo, CP 66318, CEP 05315-970 São Paulo, SP, Brazil; Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), 142190 Troitsk, Moscow, Russia; and Research School of Physics and Engineering, Australian National University, 2601 Canberra, Australian Capital Territory, Australia (Received 13 May 2014; publi...

The ITU Radiocommunication Assembly, considering a) that for the proper planning of terrestrial and Earth-space links it is necessary to have appropriate calculation procedures for assessing the refractivity effects on radio signals; b) that procedures have been developed that allow the calculation of some refractive propagation effects on radio signals on terrestrial and Earth-space links, rec...