ECE :: Electromagnetic Field Thoery
-
Distilled water at 25°C is characterized by σ = 1.7 x 10-4 mho/m and ε = 78 ε0 at a frequency of 3 GHz. Its loss tangent is (ε = 10-9/36p F/m)
-
The input impedance of short-circuited line of length l where l < λ/4
-
If the height of transmitting and receiving antenna in a LOS system are 49 meter and a 9 meter respectively then the distance up to which communication may be possible is about
-
In a line VSWR of a load is 6 dB. The reflection coefficient will be
-
∇ .
= 0 is frequently known as -
A rhombic antenna is a
-
Which of the following relations is valid?
-
Diffraction of electromagnetic waves
-
The magnetic field intensity vector of a plane wave is given by
(x, y, z, t) = 10 sin (5000t + 0.004x + 30 
), where denotes unit vector in y direction the wave is propagating with a phase velocity. -
A line of characteristic impedance z0 ohms, phase velocity VP = 2 x 108 m/sec and length l = 2 m is terminated by a load impedance zL Ohms. The reflection coefficients at the input end and load end are respectively
for a frequency of 50 MHz will be
Whatsapp
Facebook
.
, if Zd comes +j kZC then inductive, 
∇ x J = 0.
= ∇(∇ . 
.