Publication

Design and analysis of a Ka-band coaxial-to-quad-ridged circular waveguide transition

Juan Ramon Mosig, Joana Rita Alves dos Santos Silva
2014
Conference Papers

Abstract

A new coaxial-to-quad-ridged circular waveguide transition is presented which works simultaneously in the downlink (20 GHz) and uplink (30 GHz) Ka-bands. The transition comprises a double-ridge section with a back cavity fed by a coaxial probe and a transitional section where the second pair of ridges is added. The device open-end has equal symmetry planes in order to allow feeding previously designed dual-linear polarization quad-ridged devices selecting either linear polarization simply by rotating this launcher by 90°. The same procedure can be used for circular polarization with post-processing. Reflection level at the coaxial port is below -10 dB for the whole band. The overall length of the designed coaxial-to-waveguide transition is 48.1 mm. The proposed transition was simulated with CST Microwave Studio and HFSS.

Official source

https://infoscience.epfl.ch/entities/publication/1bda504a-3d00-4c11-aa2d-5f82eba21dd0

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Juan Ramon Mosig, Joana Rita Alves dos Santos Silva
2014
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/1bda504a-3d00-4c11-aa2d-5f82eba21dd0

About this result

Related concepts (19)

Circular polarization

In electrodynamics, circular polarization of an electromagnetic wave is a polarization state in which, at each point, the electromagnetic field of the wave has a constant magnitude and is rotating at a constant rate in a plane perpendicular to the direction of the wave. In electrodynamics, the strength and direction of an electric field is defined by its electric field vector. In the case of a circularly polarized wave, the tip of the electric field vector, at a given point in space, relates to the phase of the light as it travels through time and space.

Polarization (physics)

Polarization (also polarisation) is a property of transverse waves which specifies the geometrical orientation of the oscillations. In a transverse wave, the direction of the oscillation is perpendicular to the direction of motion of the wave. A simple example of a polarized transverse wave is vibrations traveling along a taut string (see image); for example, in a musical instrument like a guitar string. Depending on how the string is plucked, the vibrations can be in a vertical direction, horizontal direction, or at any angle perpendicular to the string.

Polarizer

A polarizer or polariser (see spelling differences) is an optical filter that lets light waves of a specific polarization pass through while blocking light waves of other polarizations. It can filter a beam of light of undefined or mixed polarization into a beam of well-defined polarization, that is polarized light. The common types of polarizers are linear polarizers and circular polarizers. Polarizers are used in many optical techniques and instruments, and polarizing filters find applications in photography and LCD technology.

Related publications (32)

Band Gap Renormalization at Different Symmetry Points in Perovskites

Majed Chergui, Lijie Wang

Using ultrafast broad-band transient absorption (TA) spectroscopy of photoexcited MAPbBr3 thin films with probe continua in the visible and the mid- to deep-ultraviolet (UV) ranges, we capture the ultrafast renormalization at the fundamental gap at the R s ...

Amer Chemical Soc2024

Alignment of ND3 molecules in dc-electric fields

Andreas Osterwalder, Junwen Zou, Viet Le Duc

The control of movement and orientation of gas-phase molecules has become the focus of many research areas in molecular physics. Here, ND3 molecules are polarized in a segmented, curved electrostatic guide and adiabatically aligned inside a rotatable mass ...

Aip Publishing2024

Dual-shot approach for polarization retrieval through a scattering medium

Abhijit Roy

A dual-shot technique based on the field basis addition of two statistically independent speckle patterns is developed to recover an input polarization through a scattering layer. It is proposed theoretically, and demonstrated both numerically and experime ...

Iop Publishing Ltd2024