P2ww'd'el e @@& .4 paraboloidal reflector antenna fed by a pyramidal horn has found widespread application in radar and communication engineering. However, the reflector antenna has very useful characteristics when it is fed or illuminated by two or four-conductor transmission lines. We have am.lyzed, designed, fabricated, and tested a reflector antenna fed by a pair of conical transmission Iin...

Scanning movements are added to tracking antenna trajectory to estimate the true spacecraft position. The scanning movements are composed of harmonic axial movements of an antenna. This scanning motion produces power variations of the received signal, which are used to estimate spacecraft position. Three different scanning patterns (conical scan, Lissajous scan, and rosette scan) are presented ...

Nowadays, the knowledge of science and technology, especially in the field of mobile satellite communication is developing hugely and rapidly. It is included the development of the ground station antenna as transceiver signal to make a good conducted communication between the satellite and terminal station at the earth. Moreover, as geostationary satellites are remotely located (about 36,000 km...

In this paper the phase centre of a pure mode, smooth wall, conical horn is studied. The method employed uses phase information obtained by aperture integration of the phase corrected mode field but differs from earlier presentations in first reducing the radiation integrals in terms of an identified family of functions prior to integration. The result is formulas for the principal plane radiat...

Lobby 1 Chair: Tudor Palade (Technical University of Cluj-Napoca, Romania) , Stephan Stanko (FGAN-FHR, Germany) 2.1 SIWSeries Fed RDRA Array System for Millimeter-Wave Applications Wael Abdel Wahab (University of Waterloo, Canada); Safieddin Safavi-Naeini (University of Waterloo, Canada); Dan. Busuioc (University of Waterloo, Canada) A simple, low cost novel series feeding scheme to rectangular...

I NTHISNote,wewill examine nonlinear estimation techniques to solve nonlinear problems that have been traditionally solved by linear methods. In the area of nonlinear estimation, a class of sampling algorithms known asMarkov chainMonte Carlo (MCMC) was extensively used to obtain a solution that is often a general, nonGaussian, nonunimodal probability distribution. Therefore, there is a natural ...