A J Gasiewski remote sensing course notes lecture7 PDF
Preview A J Gasiewski remote sensing course notes lecture7
ECEN 5254 Remote Sensing Signals and Systems Professor Albin J. Gasiewski Lecture #7 – February 7, 2012 EECCOOTT 224466 303-492-9688 (O) [email protected] Classes: ECCS 1B14 TR 9:30-10:45 AM 1 ECEN 5254 Remote Sensing Signals & Systems Spring 2012 University of Colorado at Boulder Administration • ASEN Remote Sensingg Seminars – Wednesday 9:00 AM ECCS 1B28 – Schedule to be pposted on D2L • HW 1 solutions posted on D2L •• HHWW 22 iissssuueedd oonn DD22LL, dduuee FFeebbrruuaarryy 1177 • List of possible term paper topics posttedd on DD22LL 2 ECEN 5254 Remote Sensing Signals & Systems Spring 2012 University of Colorado at Boulder Last Lecture • Reception of thermal radiation • RRaddiiattiion bby currentts && chharges 3 ECEN 5254 Remote Sensing Signals & Systems Spring 2012 University of Colorado at Boulder Today’s Lecture • Hertzian electric dipole • Antenna ggain,, efficiencyy,, matchingg • Half-wave dipole •• AAppeerrttuurree aanntteennnnaass 5 ECEN 5254 Remote Sensing Signals & Systems Spring 2012 University of Colorado at Boulder Frequency Domain Electrodynamic Procedure y V z x AL Most practical pathway: 6 Hertzian Electric Dipole 7 HED: Infinitesimal Current Filament z l < λ/50 ~ (r,θ,ϕ) θθ y ϕϕ xx e.g., two short wires at the end of a transmission line 8 General Wire Antenna Integration z II((rr′)) dl′ r′ r A(r) yy xx 9 HED Vector Potential (spherical coordinates) 10 HED Electric and Magnetic Fields 11
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