Design of a circular waveguide directional coupler at 22GHz

L. Lucci, R. Nesti, G. Pelosi, S. Selleri, and G. Tofani (1) University of Florence, Department of Electronics and Telecommunications, Via C. Lombroso 6/17 – I-50134 Florence, Italy http://www.unifi.it (2) INAF-Arcetri Astrophysical Observatory, Largo E. Fermi, 5 I-50125 Florence, Italy http://www.arcetri.astro.it (3) INAF-Institute of Radio Astronomy, via P. Gobetti, 101 – I-40129 Bologna, Italyhttp://www.ira.inaf.it