Principles of Electricity and Electromagnetism |
From inside the book
Results 1-3 of 21
Page 558
... antenna . If the approximation is valid , the problem is reduced to that of calculating the radiation fields due to the two antennas . The discussion can be conveniently divided into two parts , that dealing with those antennas in which ...
... antenna . If the approximation is valid , the problem is reduced to that of calculating the radiation fields due to the two antennas . The discussion can be conveniently divided into two parts , that dealing with those antennas in which ...
Page 568
... antenna constants for the major lobe of the radiation pattern can be obtained by considering the three factors separately . The first factor is a maximum as a function of when , sin = cos & The second factor has its first maximum when λ ...
... antenna constants for the major lobe of the radiation pattern can be obtained by considering the three factors separately . The first factor is a maximum as a function of when , sin = cos & The second factor has its first maximum when λ ...
Page 575
... antenna at the principal maximum obtained from n parallel coplanar half - wave antennas excited in phase is 20 log10 n . If these are each backed by a suitable antenna to suppress the radiation to the rear , the power gain is 20 log 10 ...
... antenna at the principal maximum obtained from n parallel coplanar half - wave antennas excited in phase is 20 log10 n . If these are each backed by a suitable antenna to suppress the radiation to the rear , the power gain is 20 log 10 ...
Other editions - View all
Common terms and phrases
alternating current alternating-current ampere amplifier amplitude angle angular anode antenna applied approximately armature assumed atom axis calculated capacity cathode cell characteristic charge circuit coefficient coil component condenser conducting conductor considered constant curl current flowing curve deflection density determined dielectric dielectric constant direct-current direction dynamic resistance effective electric field electromagnetic electromotive force electrons electrostatic element energy equal equation flux force frequency function galvanometer grad harmonic hence impedance induction integral ions known length linear load magnetic field magnetic moment magnitude maximum measured meter negative obtained ohms oscillations output parallel phase plane plate current positive potential difference potentiometer quantities R₁ radiation radius ratio reactance region represents resistance resonant rotation scalar shown in Fig solution surface temperature terminals theorem torque transconductance triode tube unit vacuum tube vector velocity voltage volts wave wire written zero