## Principles of Electricity and Electromagnetism |

### From inside the book

Results 1-3 of 23

Page 558

The validity of the approximation can be improved by placing a highly conducting

area or counterpoise over the surface of the ground in the neighborhood of the

base of the

The validity of the approximation can be improved by placing a highly conducting

area or counterpoise over the surface of the ground in the neighborhood of the

base of the

**antenna**. If the approximation is valid, the problem is reduced to that ...Page 560

The power radiated by a half-wave

can be calculated by means of Poynting's vector. From Eq. (16.8) the power

radiated per unit area is 2.65 X 10-" E°; inserting the value of E given by Eq. (

16.32) ...

The power radiated by a half-wave

**antenna**, and hence its radiation resistance,can be calculated by means of Poynting's vector. From Eq. (16.8) the power

radiated per unit area is 2.65 X 10-" E°; inserting the value of E given by Eq. (

16.32) ...

Page 567

-Éq-co sin %) 2Tzo 1 – cos 6 sin op in [1 – ]? (16.37) where zo is the

characteristic impedance of the

the transmission line and terminating impedance. In order to keep this

impedance constant ...

-Éq-co sin %) 2Tzo 1 – cos 6 sin op in [1 – ]? (16.37) where zo is the

characteristic impedance of the

**antenna**wire pairs, which is, of course, equal tothe transmission line and terminating impedance. In order to keep this

impedance constant ...

### What people are saying - Write a review

We haven't found any reviews in the usual places.

### Other editions - View all

### Common terms and phrases

alternating current alternating-current amplitude angle angular velocity anode antenna applied approximately armature assumed atom axis calculated capacity cathode centimeter characteristic circuit coefficient coil component condenser conducting conductor considered curl current flowing curve deflection density determined dielectric constant direct-current direction discharge displacement distance effective electric field electromotive force electrons electrostatic element energy equal equation ferromagnetic flux force frequency function galvanometer given grad grid hence hysteresis impedance induction integral ions known Laplace's equation linear load magnetic field magnetic moment magnitude maximum measured meter motor negative normal obtained ohms oscillations output parallel phase plane plate polarization positive potential difference potentiometer produced proportional quantity radiation radius ratio reactance region represents resistance resonant rotation Show shown in Fig solenoid solution substance surface temperature terminals theorem torque transformer tube unit vector voltage volts wave wire written zero