Dipole Array on a Transmission Line.
Abstract
Gain and pattern calculations have been made for an end-fire array of dipoles on a transmission line. For uniform dipole separation it is found that the array gain is a function of the line characteristic impedance and it attains a maximum value for a certain characteristic impedance. Two principal gain maxima are found to exist and the first one corresponding to a shorter uniform interdipole distance has a higher value and it is generally sharper than the other. An array with even number of dipoles has zero gain for the uniform interdipole distance of about half a wavelength. On the other hand, arrays with odd number of dipoles show a small relative maximum at the same interdipole distance. For a given line, the uniform dipole separation corresponding to the gain maxima appears to be independent of the termination. When the end-fire array gain is maximized by varying the interdipole distances and individual dipole lengths, the maximum array gain and the beam width seem to be more or less independent of the transmission line impedance and the termination. The maximum array gain is about N squared, where N is the number of dipoles in the array. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1978
- Accession Number
- ADA054315
Entities
People
- Shreedhar G. Lele
Organizations
- Tennessee Technological University