Accession Number : AD0286020

Title :   RESEARCH ON ELECTRICALLY SMALL ANTENNAS

Corporate Author : TECHNISCHE HOCHSCHULE MUNICH (WEST GERMANY)

Personal Author(s) : MEINKE,H.H.

Report Date : 28 FEB 1962

Pagination or Media Count : 1

Abstract : Research has shown that an improvement of the impedance behaviour of an antenna whose length is very small as compared to the wave length in free space, can be obtained by achieving a greater bandwidth of the antenna. A bandwidth enlargement of the antenna can be obtained by the effect of an additional radiation for the same input voltage. No additional radiation occurs for radiators whose height is smaller than 1/20 the wavelength in air and whose surrounding dielectric also does n t extend eyond its height. Additional radiation is obtained by using dielectric with antennas whose height is 1/20 to 1/10 of the wavelength in air. The additional radiation observed was very small. The use of dielectric caused an increase in the inductance and capacitance per unit length of the antenna which is considered as an inhomogeneous line. (Author)

Descriptors :   *DIODES, AIR, ANTENNA RADIATION PATTERNS, ANTENNAS, ATTENUATION, DIELECTRICS, DIFFERENTIAL EQUATIONS, EFFECTIVENESS, ELECTRIC FIELDS, ELECTRICAL IMPEDANCE, MAGNETIC FIELDS, MAGNETIC PROPERTIES, MATHEMATICAL ANALYSIS, MEASUREMENT, RESISTANCE (ELECTRICAL), THEORY

Distribution Statement : APPROVED FOR PUBLIC RELEASE