contents.m

matlab 天线和电磁分析工具箱 matlab electromagnetic and anntena

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% Electromagnetic Waves & Antennas Toolbox
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% Copyright (c) 1997-2004 by S. J. Orfanidis
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% Sophocles J. Orfanidis
% ECE Department
% Rutgers University
% 94 Brett Road
% Piscataway, NJ 08854-8058
%
% Tel.: [phone]
% e-mail: [e-mail]
% --------------------------------------------------------------------------
% The usage of these functions is explained in examples throughout the 
% author's book on "Electromagnetic Waves and Antennas".
%
% The functions may be downloaded from the book's web page:
% http://www.ece.rutgers.edu/~orfanidi/ewa
%
% Before using the toolbox, please read the license agreement 
% by running the function ewa_license, or reading the web page 
% www.ece.rutgers.edu/~orfanidi/ewa/license.txt
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% Last revision date: February 4, 2004
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% 
% The functions have been developed and tested with MATLAB v5.3
%
% Multilayer Dielectric Structures
% --------------------------------
% brewster   - calculates Brewster and critical angles
% fresnel    - Fresnel reflection coefficients for isotropic or birefringent media
% n2r        - refractive indices to reflection coefficients of M-layer structure
% r2n        - reflection coefficients to refractive indices of M-layer structure
% multidiel  - reflection response of isotropic or birefringent multilayer structures
% multidiel1 - simplified version of multidiel for isotropic layers
% multidiel2 - reflection response of lossy isotropic multilayer dielectric structures
% omniband   - bandwidth of omnidirectional mirrors and Brewster polarizers 
% omniband2  - bandwidth of birefringent multilayer mirrors
% snell      - calculates refraction angles from Snell's law for birefringent media
%
% Quarter-Wavelength Transformers
% -------------------------------
% bkwrec    - order-decreasing backward layer recursion - from a,b to r
% frwrec    - order-increasing forward layer recursion - from r to A,B
% chebtr    - Chebyshev design of broadband reflectionless quarter-wave transformer
% chebtr2   - Chebyshev design of broadband reflectionless quarter-wave transformer
% chebtr3   - Chebyshev design of broadband reflectionless quarter-wave transformer
%
% Dielectric Waveguides
% ---------------------
% dguide    - TE modes in dielectric slab waveguide
% dslab     - solves for the TE-mode cutoff wavenumbers in a dielectric slab 
%
% Transmission Lines
% ------------------
% g2z       - reflection coefficient to impedance transformation
% z2g       - impedance to reflection coefficient transformation
% lmin      - find locations of voltage minima and maxima
% mstripa   - microstrip analysis (calculates Z,eff from w/h) 
% mstripr   - microstrip synthesis with refinement (calculates w/h from Z)
% mstrips   - microstrip synthesis (calculates w/h from Z)
% multiline - reflection response of multi-segment transmission line
% swr       - standing wave ratio
% tsection  - T-section equivalent of a length-l transmission line segment
% gprop     - reflection coefficient propagation
% vprop     - voltage and current propagation
% zprop     - wave impedance propagation
%
% Impedance Matching
% ------------------
% qwt1      - quarter wavelength transformer with series segment
% qwt2      - quarter wavelength transformer with 1/8-wavelength shunt stub
% qwt3      - quarter wavelength transformer with shunt stub of adjustable length
% dualband  - two-section dual-band Chebyshev transformer
% dualbw    - bandwidth of dual-band transformer
% stub1     - single-stub matching
% stub2     - double-stub matching
% stub3     - triple-stub matching
% onesect   - one-section impedance transformer
% twosect   - two-section impedance transformer
% pi2t      - Pi to T transformation
% t2pi      - T to Pi transformation
% lmatch    - L-section reactive conjugate matching network
% pmatch    - Pi-section reactive conjugate matching network
%
% S-Parameters
% ------------
% gin       - input reflection coefficient in terms of S-parameters
% gout      - output reflection coefficient in terms of S-parameters
% nfcirc    - constant noise figure circle
% nfig      - noise figure of two-port
% sgain     - transducer, available, and operating power gains of two-port
% sgcirc    - stability and gain circles
% smat      - S-parameters to S-matrix
% smatch    - simultaneous conjugate match of a two-port
% smith     - draw basic Smith chart
% smithcir  - add stability and constant gain circles on Smith chart
% sparam    - stability parameters of two-port
% circint   - circle intersection on Gamma-plane
% circtan   - point of tangency between the two circles
%
% Linear Antenna Functions
% ------------------------
% dipole    - gain of center-fed linear dipole of length L
% travel    - gain of traveling-wave antenna of length L
% vee       - gain of traveling-wave vee antenna
% rhombic   - gain of traveling-wave rhombic antenna
% dmax      - computes directivity and beam solid angle of g(th) gain
% hallen    - solve Hallen's integral equation with delta-gap input
% hallen2   - solve Hallen's integral equation with arbitrary incident E-field
% hallen3   - solve Hallen's integral equation for 2D array of identical linear antennas
% hallen4   - solve Hallen's integral equation for 2D array of non-identical linear antennas
% pockling  - solve Pocklington's integral equation for linear antenna
% king      - King's 3-term sinusoidal approximation
% kingeval  - evaluate King's 3-term sinusoidal current approximation
% kingfit   - fits a sampled current to King's 2-term sinusoidal approximation
% gain2     - normalized gain of arbitrary 2D array of linear sinusoidal antennas
% gain2h    - gain of 2D array of non-identical linear antennas with Hallen currents
% imped     - mutual impedance between two parallel standing-wave dipoles
% impedmat  - mutual impedance matrix of array of parallel dipole antennas
% yagi      - simplified Yagi-Uda array design
%
% Aperture Antenna Functions
% --------------------------
% diffint   - generalized Fresnel diffraction integral
% diffr     - knife-edge diffraction coefficient
% dsinc     - the double-sinc function cos(pi*x)/(1-4*x^2)
% fcs       - Fresnel integrals C(x) and S(x)
% fcs2      - type-2 Fresnel integrals C2(x) and S2(x)
%
% hband     - horn antenna 3-dB width 
% heff      - aperture efficiency of horn antenna
% hgain     - horn antenna H-plane and E-plane gains
% hopt      - optimum horn antenna design
% hsigma    - optimum sigma parametes for horn antenna
%
% Antenna Array Functions
% -----------------------
% array     - gain computation for 1D equally-spaced isotropic array
% bwidth    - beamwidth mapping from psi-space to phi-space
% binomial  - binomial array weights
% dolph     - Dolph-Chebyshev array weights
% dolph2    - Riblet-Pritchard version of Dolph-Chebyshev
% dolph3    - DuHamel version of endfire Dolph-Chebyshev
% multibeam - multibeam array design
% scan      - scan array with given scanning phase
% sector    - sector beam array design
% steer     - steer array towards given angle
% taylor    - Taylor-Kaiser window array weights 
% uniform   - uniform array weights
% woodward  - Woodward-Lawson-Butler beams
%
% chebarray - Bresler's Chebyshev array design method - written by P. Simon 
%             I would like to thank Dr. Simon for premission to include 
%             this function in this collection.
%
% Gain Plotting Functions
% -----------------------
% abp       - polar gain plot in absolute units
% abz       - azimuthal gain plot in absolute units
% ab2p      - polar gain plot in absolute units - 2*pi angle range
% abz2      - azimuthal gain plot in absolute units - 2pi angle range
%
% dbp       - polar gain plot in dB
% dbz       - azimuthal gain plot in dB
% dbp2      - polar gain plot in dB - 2*pi angle range
% dbz2      - azimuthal gain plot in dB - 2pi angle range
%
% abadd     - add gain in absolute units
% abadd2    - add gain in absolute units - 2pi angle range
% dbadd     - add gain in dB
% dbadd2    - add gain in dB - 2pi angle range
% addbwp    - add 3-dB angle beamwidth in polar plots
% addbwz    - add 3-dB angle beamwidth in azimuthal plots
% addcirc   - add grid circle in polar or azimuthal plots
% addline   - add grid ray line in azimuthal or polar plots
% addray    - add ray in azimuthal or polar plots
%
% Miscellaneous Utility Functions
% --------------------------------
% ab       - dB to absolute power units
% db       - absolute power to dB units
% c2p      - complex number to phasor form
% p2c      - phasor form to complex number
% d2r      - degrees to radians
% r2d      - radians to degrees
% dtft     - DTFT of a signal x at a frequency vector w
% I0       - modified Bessel function of 1st kind and 0th order
% ellipse  - polarization ellipse parameters
% etac     - eta and c
% wavenum  - calculate wavenumber and characteristic impedance
% poly2    - specialized version of poly with increased accuracy
% quadr    - Gauss-Legendre quadrature weights and evaluation points
% quadrs   - Gauss-Legendre quadrature weights and evaluation points on subintervals
% flip     - flip a column, a row, or both
% blockmat - manipulate block matrices
% upulse   - generates trapezoidal, rectangular, triangular pulses, or a unit-step
% ustep    - unit-step or rising unit-step function
%
% MATLAB Movies (in subdirectory ewa/movies)
% ------------------------------------------
% pulsemovie  - step and pulse propagation on terminated transmission lines
% pulse2movie - step propagation on two cascaded lines
% RLCmovie    - step getting reflected off a reactive termination
% TDRmovie    - fault location by time-domain reflectometry
% xtalkmovie  - crosstalk signals on coupled transmission lines
% dipmovie    - electric field pattern of radiating Hertzian dipole
%
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