emf important questions

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Important questions pdf




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ECE 3RD SEMESTER NOTES

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okumara hata model

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% OKUMURA HATA MODEL clc; close all; clear all; hte = 30:1:100; hre = input('Enter the receiver antenna height 3m<hre<10m: '); d = input('Enter the distance from base station 1km<d<100km: '); f = input('Enter the frequency 150MHz<f<1920MHz: '); c = 3*10^8; lambda = c / (f*10^6); lf = 10*log10((lambda^2)/((4*pi)^2)); amu = 35; garea = 9; ghte = 20*log10(hte/200); if hre > 3     ghre = 20*log10(hre/3); else     ghre = 10*log10(hre/3); end l50 = lf + amu - ghte - ghre - garea; disp('Propagation path loss is:'); disp(l50); figure; plot(hte, l50, 'Linewidth', 1.5); title('Okumura model analysis'); xlabel('transmitter antenna height (m)'); ylabel('propagation path loss (dB) at set d'); grid on;
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