Effect of Antenna Directivity on Near Region Field Distribution in Rectangular Tunnel

The effect of antenna orientation on field distribution is discussed. The elevation angle and azimuth angle are adjusted to make median received power get the maximum. The electric field distribution by optimizing the pitch angle and azimuth angle is shown. The Yagi antenna is used for transmitter and the number of transmitter changes from 1–8. Then two different scenarios are shown and discussed, in which the location of receiver changes. For different scenarios and locations of receiver, the optimal numbers of antennas are given.