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Vector Analysis & Electrostatics - Index / Sitemap. 25 Mar 2013 | 07:18 pm
INDEX Vector analysis is a mathematical tool with which electromagnetic (EM) concepts are most conveniently expressed. It's important to learn its rules and techniques first applying it. VECTOR ALGE...
Transmission Lines - Solved Numericals / Problems - 2. 8 Oct 2012 | 01:28 pm
Q.4) A 70 Ω lossless line has s = 1.6 and θΓ = 300o. If the line is 0.6λ long, obtain (a) Γ, ZL, Zin (b) The distance of the first minimum voltage from the load Answer: a) Using the smith chart, loc...
Transmission Lines - Solved Numericals / Problems - 1. 7 Oct 2012 | 10:31 pm
Q.1) A transmission line operating at 500 MHz has Zo = 80Ω, α = 0.04Np/m, β = 1.5 rad/m. Find the line parameters R, L, G and C. Answer: Since Zo is real & α ǂ 0, this is a distortionless line. Ro ...
SOLVED Numerical's - Antenna Theory - Page 7. 18 Jul 2012 | 12:38 am
19) At the far field, an antenna produces Calculate the directive gain and the directivity of the antenna? SOLUTION: 20) For a thin dipole λ/16 long, find the a) Directive gain b) Directivity c) Ef...
SOLVED Numerical's - Antenna Theory - Page 6. 18 Jul 2012 | 12:21 am
16) Sketch the normalized E-field and H-field patterns for a. A half-wave dipole b. A quarter-wave monopole. SOLUTION: a) b) The same as for λ/2 dipole except that the fields are zero for θ > π/2 a...
SOLVED Numerical's - Antenna Theory - Page 5. 17 Jul 2012 | 01:22 am
13) A 1-m-long car radio antenna operates in the AM frequency of 1.5 MHz. How much current is required to transmit 4 W of power? SOLUTION: This is a monopole antenna λ = c / f = (3 x 108) / (1.5 x ...
SOLVED Numerical's - Antenna Theory - Page 4. 17 Jul 2012 | 12:56 am
9) A Hertzian dipole at the origin in free space has dl = 20 cm and I = 10 cos2π107t A, find |Eθs| at the distant point (100, 0, 0). SOLUTION: λ = c / f = ( 3 x 108 ) / (107) = 30 m At (100, 0, 0),...
SOLVED Numerical's - Antenna Theory - Page 3. 17 Jul 2012 | 12:11 am
6) An antenna in air radiates a total power of 100 kW so that maximum radiated electric field strength of 12 mV/m is measured 20 km from the antenna. Find its: (a) Directivity in dB (b) Maximum power ...
SOLVED Numerical's - Antenna Theory - Page 2. 16 Jul 2012 | 11:56 pm
3) A certain antenna with an efficiency of 95% has maximum radiation intensity of 0.5 W/sr. Calculate its directivity when (a) The input power is 0.4 W (b) The radiated power is 0.3 W SOLUTION: a) ...
SOLVED Numerical's - Antenna Theory - Page 1. 16 Jul 2012 | 11:43 pm
1) An electric field strength of 10 µV/m is to be measured at an observation point θ = π/2, 500 km from a λ/4 monopole antenna operating in air at 50 MHz. (a) What is the length of the dipole? (b) Cal...
