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A subwavelength superstrate antenna operated at dual-band is proposed using a metasurface (MTS). To design the proposed antenna, the MTS as a partially reflective surface (PRS) has a zero-degree reflection phase at dual-band and is composed of a substrate, periodic metallic square patches and rings on one side, and periodic metallic meshes on the other side. To satisfy the resonance condition of Fabry-Perot...
This study presents the design of a dual-band cavity-backed phased array antenna with wide-angle scanning capability in K/Ka bands for the geostationary (GSO)-fixed satellite service (FSS). To reduce the losses and mutual coupling, a novel antenna element similar to the cavity-backed Strip-Slot-Air-Inverted-Patch (SSAIP) is proposed as an element of designed array of 81 elements. Wide-angle scanning...
In this paper, a novel dumbbell-shaped slot alongwith thin substrate integrated waveguide (SIW) cavity backingis used to design dual-band slot antenna. The design in thispaper has unidirectional radiation pattern, high gain, high(FTBR) at each resonant frequency while having low profile, planar configuration. The unique slot shape creates complexcurrent distribution at different frequencies that results...
A new balanced dual-band bandpass filter (BPF) utilizing substrate integrated waveguide (SIW) technology is proposed in this paper. By wisely arranging TE102-mode SIW cavities on the symmetrical plane, the presented balanced BPF can realize selective differential-mode (DM) transmission and quite high common-mode (CM) suppression. In addition, by adopting the extracted-pole mechanisms simultaneously,...
This paper presents a novel technique to design a dual-band bandpass filter by exploiting the second order degenerated modes of the SIW-cavity. The second order filter has been designed by using the proposed technique, at Ka-band of microwave frequencies; the ratio of two bands center frequencies — frequency ratio (FR) — is 1.073. Rogers RT/Duroid 5880 — with substrate height of 0.508mm — has been...
An investigation of microstrip-fed cavity-backed cross slot antennas using an elliptic cavity is presented in this letter. The antenna has two crossed radiating slots printed on the bottom of substrate and an elliptic cavity behind the slots. Two dual-arm microstrip-fed lines are used to excite which are etched on the upper side of the substrate. An elliptic metal sheet is placed at a distance between...
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