Essays about: "Yagi"

Found 3 essays containing the word Yagi.

  1. 1. Investigation and comparison between radiation and phase center for canonical antennas

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Casimir Ehrenborg; [2014]
    Keywords : Technology and Engineering;

    Abstract : The phase center is defined as the point on an antenna from which the far field radiation seems to originate. Phase center calculations are often uncertain and vague, and very little concrete information is available on the subject. Recently, a replacement parameter called the radiation center was introduced in [5]. READ MORE

  3. 2. Investigation of a small-sized omnidirectional antenna

    University essay from Institutionen för datavetenskap, fysik och matematik, DFM

    Author : Iuliia Goncharova; [2012]
    Keywords : Dipole; Directivity; Cylindrical antenna array; Omnidirectional antenna; Radiation pattern; Yagi-Uda dipole array;

    Abstract : The purpose of this research is to find ways to create an omnidirectional antenna with high directivity in the vertical plane. The investigation is based on computer simulation using the program CST 2011. The objective is a narrow-band antenna that is omnidirectional in the horizontal plane and has maximum achievable directivity for a fixed size. READ MORE

  4. 3. System and Method for Passive Radiative RFID Tag Positioning in Realtime for both Elevation and Azimuth Directions

    University essay from KTH/Kommunikationssystem, CoS

    Author : Mahyar Modaresi; [2010]
    Keywords : radio-frequency identification; RFID; wireless positioning; phase-comparison monopulse; UHF band; Microstrip Yagi-Uda antenna; antenna array; human-computer interaction; RFID pen; mouse cursor; RFID security model;

    Abstract : In this thesis, design and realization of a system which enables precise positioning of RFID tags in both azimuth and elevation angles is explained. The positioning is based on measuring the phase difference between four Yagi antennas placed in two arrays. READ MORE