Appendix IV-B

Author: Edmund A. Laport

Chart of angles of nulls in the function The angles of nulls in the patterns of Appendix IV-A as measured from the normal to the axis of the radiators are read from this chart.

NOTE:

When applied to radiation patterns of straight antennas parallel to perfectly reflecting surfaces (such as "ground" or passive reflectors), S represents the electrical spacing between the antenna and its image. Therefore S/2 is the electrical height h of the antenna above ground, or the electrical distance d from a reflecting screen.

Tabulation of the functions and for values of S from 180 to 2,520 degrees in 180-degree steps.

These are the patterns in the equatorial plane of two identical parallel nonstaggered radiators with equal currents in antiphase relation. By dividing the column headings for S (degrees) by 2, each column can be read as a vertical pattern for a horizontal antenna over perfectly conducting ground.

Tabulation of the functions cos f ^ sin <f> 1 and cos « sin (90 - <#>) I for values of S from 180 to 2,520 degrees in 180-degree steps.

These are the patterns in the equatorial plane of two identical parallel nonstaggered radiators with equal cophased currents.