Eur. Phys. J. Plus (2019) 134: 139
https://doi.org/10.1140/epjp/i2019-12639-5

Regular Article

Analytical modelling and experiments of the reconfigurable filtering transmissions through a meta-gated waveguide-bend cavity

¹ School of Electronic Engineering, Xidian University, 710071, Xi’an, China
² Beijing Institute of Astronautical Systems Engineering, 100076, Beijing, China

^* e-mail: ruiyang.xidian@gmail.com

Received: 2 November 2018
Accepted: 28 December 2018
Published online: 4 April 2019

Abstract

We create a reconfigurable transmission cavity though cascading two adjacent waveguide-bends, where the released energies are shown to possess different transmission bandwidths when the C-slit meta-gates are inserted into the bending corners with different rotating angles. A circuit modelling is proposed for the analysis of such a waveguide-bend cavity and perfectly accounts for all the details of the transmission spectrums, including the meta-gated transmissions and also the spurious passbands. Finally, we fabricate and test the waveguide-bend cavity, and the transmissions are shown to be reconfigured from original multiple passbands of bare cavity to the single tunable filtering transmission with the C-slit meta-gates in the experiment.