Orthogonal-mode junction coupler having a dipole radiating structure and method of coupling
View Patent ↗Orthogonal-mode junction coupler with a medium to broad bandwidth for a waveguide ( 1 ) operating at a wavelength λ, characterized in that it includes a connector ( 5 ) projecting from the waveguide ( 1 ) and extending between a short circuit ( 3 ) of the waveguide ( 1 ) and a conducting structure ( 6 ) acting as dipole radiating at a wavelength of approximately λ/2 excited at its central point by the connector.
1. An orthogonal-mode junction coupler with a medium to broad bandwidth for a waveguide operating at a wavelength λ, wherein the coupler comprises a connector projecting from the waveguide and extending between a short circuit of the waveguide and a conducting structure acting as a dipole radiating at a wavelength of approximately λ/2 excited at a central point of the dipole by the connector.
2. The orthogonal-mode junction connector according to claim 1 wherein the connector consists of a conducting rod electrically isolated from the waveguide and capacitively supplying the conducting structure.
3. The orthogonal-mode junction connector according to any one of claims 1 or 2 wherein the conducting structure consists of two fins, C-shaped or U-shaped, extending symmetrically on either side of a plane of symmetry of the waveguide, each fin comprising a first branch integral with the waveguide and extending above the connector and parallel thereto toward the plane of symmetry of said waveguide and a second branch extending parallel to the first branch above the first branch, said first and second branches of each fin being connected by a vertical base extending perpendicularly to the connector.
4. The orthogonal-mode junction connector according to any one of claims 1 or 2 , wherein a distance d 1 separating the short circuit of the waveguide from the connector is approximately equal to one quarter of the wavelength λ of the waveguide.
5. A method of orthogonal-mode junction coupling with a medium to broad operating bandwidth for a waveguide with a wavelength λ, the method comprising:
capacitively supplying a conducting structure integral with the waveguide through a connector projecting inside the waveguide and extending between a short circuit of said waveguide and the conducting structure,
the conducting structure acting as a dipole radiating at a wavelength of approximately λ/2 excited at a central point of the dipole by the connector.