• 2 Pages hw408
    Hw408

    School: Harvard

    ES 151 Assignment #4 Instructor: Donhee Ham Date: February 28, 2008 Due: 10:00am, March 6th, 2008. Problem 1 (10pt) Two dielectric media with dielectric constants K1 and K2 are separated by a plane interface. There is no external charge on the inter

  • 8 Pages waveguides
    Waveguides

    School: Harvard

    Guided Wave Formulation of Maxwell's Equations I. General Theory: Recapitulation - frequency domain formulation of the macroscopic Maxwel l equations in a source-free region: r r r r curl E(r, ) = j H(r , ) [ I-1a ] r r r r curl H( r, ) = + j E( r,

  • 25 Pages transmission_lines_1
    Transmission_lines_1

    School: Harvard

    TRANSMISSION LINE THEORY I. The Transmission Line Model: Consider the following repeating (uniform) sequence of "lumped" circuit elements: Applying elementary circuit analysis to each node of such a "discrete" transmission line we may write a set of

  • 16 Pages paraxial_solutions
    Paraxial_solutions

    School: Harvard

    THE PARAXIAL WAVE EQUATION GAUSSIAN BEAMS IN UNIFORM MEDIA : In point-to-point communication, we may think of the electromagnetic field as propagating in a kind of "searchlight" mode - i.e. a beam of finite width that propagates in some particular di

  • 11 Pages basic_antenna_theory
    Basic_antenna_theory

    School: Harvard

    A N INTRODUCTION TO A NTENNA THEORY: RADIATION FROM A HERTZIAN DIPOLE The general "radiation" or "antenna" problem comes down to the task of finding the electromagnetic field associated with or derived from a given or known current distribution. Obse

  • 20 Pages signals_and_channels
    Signals_and_channels

    School: Harvard

    SIGNALS AND CHANNELS I. GENERAL COMMENTS ON COMMUNICATION P ROCESSES : As a first cut in the study of any particular communication process it is useful to examine the diagrammatic representation of that process (a representation which may be attribut

  • 13 Pages transmission_lines_2
    Transmission_lines_2

    School: Harvard

    PULSE PROPAGATION ON A DISPERSIVE TRANSMISSION LINE I. P RELIMINARIES - A R EVIEW OF S OME B ASIC CONCEPTS AND METHODS : Let us consider the propagation of a typical signaling voltage pulse V( z, t) along a transmission line. At some particular posit

  • 15 Pages eikonal_treatment
    Eikonal_treatment

    School: Harvard

    RAYS: THE EIKONAL TREATMENT OF GEOMETRIC OPTICS Since ancient times, the notion of ray or beam propagation has been one of the most enduring and fundamental concepts in physics. As a zeroth order approximation we might consider a plane wave to be a m

  • 20 Pages fourier_optics
    Fourier_optics

    School: Harvard

    FOURIER OPTICS I. THE DIFFRACTION INTEGRAL: It may be fairly said that "it is well known" that plane waves are solutions of the homogeneous Helmholz equation.1 Thus, by a generalization of the Fourier theorem, we expect to be able to write a general

  • 6 Pages radiation_basics
    Radiation_basics

    School: Harvard

    ELECTROMAGNETIC RADIATION - THE BASICS A RESTATEMENT OF MACROSCOPIC MAXWELL ' S EQUATIONS IN THE F REQUENCY DOMAIN - V ALID FOR LINEAR , L OCAL , A NISOTROPIC MEDIA IN THE O PTICAL R EGIME . r r r r t r r r r r r r E( r , ) = 1 (r , ) D( r, ) =

  • 19 Pages planewave_solutions
    Planewave_solutions

    School: Harvard

    PLANE WAVE SOLUTIONS OF MAXWELL' S EQUATIONS I. CHARACTERISTICS OF P LANE WAVE SOLUTIONS : For the record, let us once again restate the form of the macroscopic Maxwell's equations in the time domain which is valid in the high frequency or optical re

  • 4 Pages lab_assign_1_98
    Lab_assign_1_98

    School: Harvard

    Engineering Sciences 151 Electromagnetic Communication Laboratory Assignment 1 Fall Term 1998-99 MODULATION AND D EMODULATION OBJECTIVES: To gain some experience with information encoding schemes and to explore the spectral characteristics of typic

  • 3 Pages hw508
    Hw508

    School: Harvard

    ES 151 Assignment #5 Instructor: Donhee Ham Date: March 6, 2008 Due: 10:00am, March 13, 2008. Problem 1 (30pt) (a) The Helmholtz coil pair consists of two parallel, coaxial loops, and can provide a region of relatively uniform elds; the uniform-eld

  • 2 Pages hw308
    Hw308

    School: Harvard

    ES 151 Assignment #3 Instructor: Donhee Ham Date: February 21st, 2008 Due: 10:00am, February 28th, 2008. Problem 1 (40pt) Consider two concentric spherical conductors with air between them. The inner conductor of radius a is at potential V0 and has

  • 7 Pages transmission_lines_3
    Transmission_lines_3

    School: Harvard

    Consider a lossless transmission with wavenumber ( ) and characteristic impedance Zc ( ) which is periodically loaded with a shunt admittance Y ( ) . m-1 m m+1 Y() Y() Y() From transmission line theory, we know that we can write the s

  • 5 Pages lab_assign_3_98
    Lab_assign_3_98

    School: Harvard

    Engineering Sciences 151 Electromagnetic Communication Laboratory Assignment 3 Fall Term 1998-99 WAVE P ROPAGATION II: HIGH F REQUENCY SLOTTED L INE AND REFLECTOMETER MEASUREMENTS OBJECTIVES: To build greater familiarity with transmission line conc

  • 3 Pages lab_assign_2_97
    Lab_assign_2_97

    School: Harvard

    Engineering Sciences 151 Electromagnetic Communication Laboratory Assignment 2 Fall Term 1997-98 WAVE P ROPAGATION I: C HARACTERISTICS OF D ISCRETE AND CONTINUOUS E LEMENT T RANSMISSION L INES OBJECTIVES: To expand familiarity with transmission lin

  • 9 Pages electromagnetic_properties
    Electromagnetic_properties

    School: Harvard

    ELECTROMAGNETIC PROPERTIES OF MATTER I. DYNAMICS OF BOUND CHARGES - MODELING DIELECTRIC B EHAVIOR : Consider the electrically induced distortion or polarization of some typical neutral and isolated "molecular" configuration1- viz. - 6 - Applied e

  • 7 Pages lab_assign_4_98
    Lab_assign_4_98

    School: Harvard

    Engineering Sciences 151 Electromagnetic Communication Laboratory Assignment 4 Fall Term 1997-98 OBJECTIVES: To build familiarity with interference phenomena and interferometric measurement techniques; to use a Mach-Zehnder interferometer to measur

  • 10 Pages lab_assign_5_98
    Lab_assign_5_98

    School: Harvard

    Engineering Sciences 151 Electromagnetic Communication Laboratory Assignment 5 Fall Term 1998-99 ELECTROMAGNETIC RADIATION CHARACTERISTICS Microwave Antenna Measurements OBJECTIVE: To study the radiation patterns and other characteristics of a vari

  • 6 Pages antenna_receiving
    Antenna_receiving

    School: Harvard

    RECEIVING A NTENNA CHARACTERISTICS To understand the characteristics and evaluate the performance of receiving antennas in general, consider the following analysis of a particular model - viz. the filamentary (wire) structure illustrated below which

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