www.gusucode.com > rf 工具箱matlab源码程序 > rf/h2s.m
function s_params = h2s(h_params, z0) %H2S Convert hybrid H-parameters to S-parameters % S_PARAMS = H2S(H_PARAMS, Z0) converts the hybrid H-parameters H_PARAMS % into the scattering parameters S_PARAMS. % % H_PARAMS is a complex 2x2xM array of M 2-port H-parameters. Z0 is the % reference impedance, the default is 50 ohms. The output S_PARAMS is a % complex 2x2xM array of M 2-port S-parameters. % % See also S2H, H2Y, H2Z, H2ABCD, Y2S, Z2S, ABCD2S % Copyright 2003-2010 The MathWorks, Inc. narginchk(1,2); % Check the input H-parameters m = CheckNetworkData(h_params, 2, 'H_PARAMS'); % Check the reference impedance if nargin < 2 z0 = 50*ones(1,1,m); else z0 = CheckZ(z0, m, 'Z0'); end % Get the H-parameters [h11, h12, h21, h22] = deal(h_params(1,1,:)./z0, h_params(1,2,:), ... h_params(2,1,:), h_params(2,2,:).*z0); % Calculate the S-parameters delta = (h11+1).*(h22+1)-h12.*h21; s_params = [((h11-1).*(h22+1)-h12.*h21), 2*h12; -2*h21, ... ((1+h11).*(1-h22)+h12.*h21)] ./ repmat(delta, [2 2 1]);