THEORETICAL AND EXPERIMENTAL STUDIES OF ANTENNAS AND ARRAYS IN A PARALLEL-PLATE REGION. PART IV WAVE PROPAGATION ALONG INFINITE YAGI-TYPE ARRAY IN A PARALLEL-PLATE REGION,
Abstract
An approximate expression for the phase velocity of wave propagation along an infinite Yagi-type array in a parallel-plate region was derived by a variational method. The dependence of the propagation constant on the various geometrical parameters of the array is discussed. For antenna lengths less than a half-wavelength and for short distances between elements, it was shown that there can be two independent surface wave modes propagating along the structure. A transcendental equation for the propagation con stant of the periodic structure was also obtained by a more rigorous impedance pproach taking into account the mutual coupling between antenna ele ments. The design and fabrication of the experi mental equipment is described. An outline of the proposed experimental work is given and methods for measuring the propagation constant, gain, front-to-back ratio, current-distribution on the elements, radiation pattern, input impedance, longitudinal and transverse field distribution and excitation efficiency of the array are described. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 15, 1963
- Accession Number
- AD0413453
Entities
People
- B.rama Rao
Organizations
- Harvard University