7 research outputs found
Tolpa for mm-wave: A wideband low profile, omnidirectional vertically polarized antenna
In an article (Zürcher, Microwave Opt Technol Lett 55 (2013), 516–521) published in 2013, a new antenna called tripod omnidirectional low profile Antenna has been presented. It is vertically polarized and has a radiation pattern similar to the classical monopole on a ground plane, with numerous potential applications for mobile communications, UWB, and others. The present article describes a scaled version of this antenna designed to work at mm-wave frequencies
Experimental verification of broadband cloaking using a volumetric cloak composed of periodically stacked cylindrical transmission-line networks
Cloaking using a volumetric structure composed of stacked two-dimensional
transmission-line networks is verified with measurements. The measurements are
done in a waveguide, in which an array of metallic cylinders is inserted
causing a short-circuit in the waveguide. The metal cylinders are cloaked using
a previously designed and simulated cloak that hides the cylinders and thus
enables wave propagation inside the waveguide.Comment: 8 pages, 3 figure
Surface Clutter Suppression Techniques Applied to P-band Multi-Channel SAR Ice Sounder Data from East Antarctica
Molecular epidemiology of hepatitis B virus infection in Switzerland: a retrospective cohort study
Ka-Band Rectangular Waveguide to Suspended Stripline Transition
A Ka-band transition between a rectangular waveguide and a suspended stripline (SSL) is proposed. It uses a configuration in which the SSL substrate is perpendicular to the waveguide main axis. A patch printed on the SSL substrate is used to match the characteristic impedance of the waveguide. A set of formulas to facilitate the design of the element is presented. A prototype of the transition was fabricated and the experimental results agree well with the simulations. The proposed element can have the input matching below -15 dB in a 13% bandwidth while maintaining the insertion loss below 0.22 dB