Ultra-wideband dual polarized cavity backed antenna

The developed a cavity backed dual polarized antenna composed of a dual polarized exciting element backed by a rectangular cavity with square cross-section. The exciting element consists of two orthogonal identical bowtie dipoles shorted together using square ring. The square cross section supports two orthogonal degenerate waveguide modes, TE₁₀ and TE₀₁. Depending on which bowtie element is excited, one of these modes is excited. This design allows achieving about an octave bandwidth of operation in a relatively compact size.