Abstract
In this paper, inspired from the technique of patch–aperture–patch, a novel tri-band frequency selective surface with second-order band-pass response in each operation band is presented. The design is implemented by cascading a two-dimensional periodic array of three square loops and an array of wire grids. The proposed structure composed of three metal and two dielectric layers acts as a spatial dual band microwave filter with large band separation. The predicted FSS has the merits of broadband response, excellent stability for different incident angles, and sharp roll-off at X-, Ku- and K-band, respectively. The simulation and measurement are carried out and discussed. The measured results agree well with the simulated ones.
Highlights
Frequency selective surfaces have been studied extensively for many years [1]
Multi-band FSSs are the result of the following techniques: Multi-order resonance of a single layer FSS [4,5,6], loading lumped elements [7] and fractal elements [2], etc
The FSS has the merits of polarization insensitivity and incident angle stability
Summary
Frequency selective surfaces have been studied extensively for many years [1]. They are widely used in the design of various microwave devices, such as antenna reflectors, radomes, absorbers, as well as electromagnetic band gap materials [2]. Multi-band FSSs are the result of the following techniques: Multi-order resonance of a single layer FSS [4,5,6], loading lumped elements [7] and fractal elements [2], etc. These designs generally have one resonation in each operating band. The patch–aperture–patch (PAP) FSS was proposed and developed in [10,11,12] Such a kind of FSS possesses higher selectivity and flat pass-band in its operating frequencies, but such FSS usually have larger element size. The design procedure, the simulation and measurement results of predicted FSS are presented and discussed
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