Printed Circuit Folded Dipole with Integrated Balun.

摘要

This report documents the design and testing of a printed circuit folded dipole with a unique double-tuning balun as feed. Simple transmission line theory is used to analyze the balun structure, whereas the method-of-moments and conformal mapping techniques are used to analyze the dipole impedance and step-up ratio. Two dipoles were then fabricated on substrates of different dielectric constant material. The antenna designs were then tested for impedance match and radiation characteristics. First, SWR measurements were made on the two dipoles that were fabricated, and the results compared to theory. Next, antenna patterns are taken of the folded dipoles at several frequencies over the operating band to determine any frequency dependence of the patterns. Finally, cross-polarization patterns are presented. (RH)