Dielectric resonator probe arrays with sectoral hard horn for wideband spatial power combiners/dividers

Abstract

Analysis of dielectric resonator probe (DRP) arrays operating in an oversized hard waveguide with sectoral hard horn excitation is presented. A single DRP excited by a coaxial probe is first investigated inside a hollow rectangular waveguide and a waveguide loaded with hard walls, respectively. Simulation results are compared with measurement results and show a good agreement. Then, a one-dimensional DRP array is analysed inside a dielectric-loaded, oversized waveguide with sectoral hard horn excitation. A full-wave analysis based on the region-by-region finite-difference time-domain technique is applied for the optimisation of array parameters such as inter-element coupling, active reflection coefficients and uniform excitation. Numerical results are compared with those generated by using commercial software and exhibit a very good agreement.

Extraordinary electromagnetic transmission through a circular aperture surrounded by surface corrugations

“…Electromagnetic scattering from a circular aperture in a conducting plane has been studied extensively for its applications in aperture coupled structures, aperture antennas and electromagnetic interference and compatibility [1][2][3]. It is also well-known that corrugated structures can be used to obtain hard or soft surfaces artificially [4][5][6][7]. Recently, there have been substantial efforts to investigate the extraordinary optical transmission [8][9][10][11][12][13][14][15][16] and angular confinement of radiated fields [17][18][19][20] associated with leaky surface-plasmon theory [21,22].…”