ewa.zip_Dtft a_-psi_lines_sector beam_window Woodward_woodward

% -------------------------------------------------------------------------- % Electromagnetic Waves & Antennas Toolbox % -------------------------------------------------------------------------- % Copyright (c) 1997-2008 by S. J. Orfanidis % -------------------------------------------------------------------------- % Sophocles J. Orfanidis % ECE Department % Rutgers University % 94 Brett Road % Piscataway, NJ 08854-8058 % % Tel.: 732-445-5017 % e-mail: orfanidi@ece.rutgers.edu % -------------------------------------------------------------------------- % 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 % -------------------------------------------------------------------------- % Last revision date: April 25, 2008 % -------------------------------------------------------------------------- % The functions have been developed and tested with MATLAB v5.3 and v7.0 % -------------------------------------------------------------------------- % % 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 % snel - calculates refraction angles from Snel'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 % ------------------------ % dipdir - dipole directivity % dmax - computes directivity and beam solid angle of g(th) gain % dipole - gain of center-fed linear dipole of length L % traveling - gain of traveling-wave antenna of length L % vee - gain of traveling-wave vee antenna % rhombic - gain of traveling-wave rhombic 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 % kingprime - converts King's 3-term coefficients from unprimed to primed form % % hbasis - basis functions for Hallen equation % hdelta - solve Hallen's equation with delta-gap input % hfield - solve Hallen's equation with arbitrary incident E-field % hmat - Hallen impedance matrix with method of moments and point-matching % hwrap - wraps a Toeplitz impedance matrix to half its size % kernel - thin-wire kernel computation for Hallen equation % pfield - solve Pocklington's equation with arbitrary incident E-field % pmat - Pocklington impedance matrix with method of moments and point-matching % % hcoupled - solve Hallen's equation for 2D array of non-identical parallel dipoles % hcoupled2 - solve Hallen's equation for 2D array of identical parallel dipoles % % gain2d - normalized gain of 2D array of parallel dipoles with Hallen currents % gain2s - normalized gain of 2D array of parallel dipoles with sinusoidal currents % imped - mutual impedance between two parallel standing-wave dipoles % imped2 - mutual impedance between two parallel standing-wave dipoles % impedmat - mutual impedance matrix of array of parallel dipole antennas % resonant - calculates the length of a resonant dipole antenna % 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 % ----------------------- % gain1d - normalized 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 % prol - prolate array design % prolmat - prolate matrix % scan - scan array with given scanning phase % sector - sector beam array design %