57 research outputs found
Characteristic Mode Analysis of Multi-Octave Asymmetric Dipoles
This paper discusses the impedance and front-to-back ratio performance of asymmetric dipoles. These parameters are very important when the antennas are placed over a conductive ground plane and should operate over multi-octave frequency bands. The operation of these antennas is usually described relying on analogies with more classical structures such as symmetric dipoles and tapered slot antennas. To provide a solid theoretical background to this intuition, this work presents the application of characteristic mode analysis to multi-octave dipole antennas. Firstly, a brief review of the main characteristic mode content is presented. Then, characteristic mode analysis is applied to three antenna concepts to emphasize how their geometry impacts on the relevant figures of merit. This allows to draw some conclusions on the achievable performance by different designs
B-Pol: Detecting Primordial Gravitational Waves Generated During Inflation
B-Pol is a medium-class space mission aimed at detecting the primordial
gravitational waves generated during inflation through high accuracy
measurements of the Cosmic Microwave Background (CMB) polarization. We discuss
the scientific background, feasibility of the experiment, and implementation
developed in response to the ESA Cosmic Vision 2015-2025 Call for Proposals.Comment: Experimental Astronomy - The original publication is available at
http://www.springerlink.co
Film-loaded Strip- and Slot-type SAW Waveguides for IntegratedAcousto-Optical Polarization Converters in LiNbO3
Analysis of Piezoelectric Strip Waveguides Based on the Effective Index and Pseudospectral Element Methods
Analysis of Piezoelectric Strip Waveguides based on EffectiveIndex Method and Pseudo-Spectral Elements Method
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