We present a compact and efficient electromagnetic source able to generate a 2-D Gaussian beam in a parallel-plate waveguide. The parallel-plate waveguide is a typical guiding structure used to experimentally test in a laboratory the electromagnetic behavior of a device under test in terms of propagation, transmission, and reflection. The most common launcher for this waveguide is a quarter-wavelength monopole, which generates a cylindrical wave. However, in order to approximate the cylindrical wave to a plane-wave impinging on the device under test, this launcher needs electrically large setups. The proposed solution makes use of a metallic bidimensional parabolic reflector, which is able to transform the cylindrical wave radiated by the conventional launcher into a plane wave with the Gaussian amplitude distribution. We demonstrate that this setup can dramatically reduce the dimensions of a conventional launcher for a given directivity (i.e., planarity of the generated phase fronts). The optimum design and the experimental verification of the proposed compact launcher are presented.
Tobia, A., Ramaccia, D., Toscano, A., Bilotti, F. (2018). Design and experimental verification of a compact Gaussian beam source for parallel-plate waveguide tests. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 66(8), 4288-4291 [10.1109/TAP.2018.2839975].
Design and experimental verification of a compact Gaussian beam source for parallel-plate waveguide tests
Tobia, A.;Ramaccia, D.;Toscano, A.;Bilotti, F.
2018-01-01
Abstract
We present a compact and efficient electromagnetic source able to generate a 2-D Gaussian beam in a parallel-plate waveguide. The parallel-plate waveguide is a typical guiding structure used to experimentally test in a laboratory the electromagnetic behavior of a device under test in terms of propagation, transmission, and reflection. The most common launcher for this waveguide is a quarter-wavelength monopole, which generates a cylindrical wave. However, in order to approximate the cylindrical wave to a plane-wave impinging on the device under test, this launcher needs electrically large setups. The proposed solution makes use of a metallic bidimensional parabolic reflector, which is able to transform the cylindrical wave radiated by the conventional launcher into a plane wave with the Gaussian amplitude distribution. We demonstrate that this setup can dramatically reduce the dimensions of a conventional launcher for a given directivity (i.e., planarity of the generated phase fronts). The optimum design and the experimental verification of the proposed compact launcher are presented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
