Patent ID: 7944324

Claim:
An orthomode transducer device (D) for an antenna, comprising (i) a main guide (GP) designed for the propagation along a main axis of first and second electromagnetic modes having first and second polarizations orthogonal to each other and provided with a first end coupled to a circular port (AC) suited to said first and second modes and a second end, (ii) a first auxiliary guide (GA 1 ) designed for the propagation of said first electromagnetic mode along a first auxiliary axis, and provided with a first end coupled in series to said second end of the main guide (GP) via a series window (FSP) and with a second end coupled to a series port (AS) suited to said first mode, and (iii) a second auxiliary guide (GA 2 ) designed for the propagation of said second electromagnetic mode along a second auxiliary axis, coupled to said main guide (GP) via at least one parallel window (FPL, FPT) and provided with a first end coupled to a parallel port (AP) suited to said second mode, wherein said first (GA 1 ) and second (GA 2 ) auxiliary guides are located one above the other so that their first and second auxiliary axes are parallel to said main axis, and each parallel window (FPL, FPT) is defined between an upper wall (PS) of the main guide (GP) and a lower wall (PI) of the second auxiliary guide (GA 2 ), and oriented in relation to said main axis so as to enable coupling of the main guide (GP) to the second auxiliary guide (GA 2 ) for the selective transfer of the second mode from one to the other and so as to make said first mode propagate between the main guide (GP) and the first auxiliary guide (GA 1 ).