Patent ID: 8994473
Filing Date: 2015-03-31
Classification: H01P,H01Q

Abstract:
1. A multi-band antenna feed comprising: a first waveguide and a second waveguide, each said waveguide including: (a) a distal section; (b) a medial section; and (c) a proximal section; wherein said distal section and said medial section are configured to rotate relative to each other and relative to said proximal section; wherein, when said distal section and said medial section are in a first configuration relative to each other and to said proximal section, the waveguide transforms linearly polarized electromagnetic radiation input to a proximal end of said proximal section into linearly polarized electromagnetic radiation output from a distal end of said distal section and transforms linearly polarized electromagnetic radiation input to said distal end of said distal section into linearly polarized electromagnetic radiation output from said proximal end of said proximal section; wherein, when said distal section and said medial section are in a second configuration relative to each other and to said proximal section, the waveguide transforms linearly polarized electromagnetic radiation input to said proximal end of said proximal section into circularly polarized electromagnetic radiation output from said distal end of said distal section and transforms circularly polarized electromagnetic radiation input to said distal end of said distal section into linearly polarized electromagnetic radiation output from said proximal end of said proximal section; wherein said distal section and said medial section are rotated differently with respect to each other in said second configuration than in said first configuration, wherein