A circularly polarized (CP) substrate integrated waveguide (SIW) cavity-backed slot antenna is proposed. A slot split ring (SSR) etched on the top metal surface of an SIW resonator is employed to generate the right-handed circularly polarized (RHCP) wave. The proposed antenna is excited directly by a coaxial probe with a proper distance from the symmetric axis of the SSR resonator. A prototype ...

Planar antenna reflectors are the modern design trend of both multibeam and frequency-scanning arrays. The planar implementation is typically performed using substrate-integrated waveguide (SIW) technology. A reflector’s profile can be different from canonical one (parabolic, elliptic, hyperbolic, etc.) because effect spatial dispersion reflection coefficient SIW-based surface. It should synthe...

We attempt to design and fabricate of a 4×4 Butler matrix for short-millimeter-wave frequencies by using the microfabrication process polytetrafluoroethylene (PTFE) substrate-integrated waveguide (SIW) synchrotron radiation (SR) direct etching PTFE addition metal film sputter deposition. First, dimensions SIW rectangular through-holes G-band (140-220 GHz) operation are determined, cruciform 90 ...

A power divider (PD)/ power combiner (PC) with high quality factor and enhanced output ports isolation using substrate integrated waveguide (SIW) technology is proposed. An SIW cavity is designed to provide a high quality factor filtering response and an SMD resistor is attached between two output ports to realize the high isolation. The value of the applied resistor is calculated by using the ...

Nanometric ions, such as polyoxometalates (POMs) or ionic boron clusters, with low charge density have previously shown a strong propensity to bind macrocycles and adsorb neutral surfaces: micellar, surfactant covered water–air polymer surfaces. These association phenomena were arise from solvent-mediated effect called the (super-)chaotropic effect. We show here by combining cloud point (CP) me...