Resonance phenomena on non-skewed H-plane multiple-Yagi arrays

Theoretical and experimental swept-frequency radiation and impedance characteristics of several multiple-Yagi arrays indicate that, in addition to the resonance phenomena associated with the dipole cutoff region of the single Yagi, other resonances are also present on the multiple-Yagi configuration. These resonances are dependent not only upon the individual Yagi parameters but also upon the relative orientation and spacing of the array antennas. Substantial variations are also observed in the array gain, bandwidth, and front-to-back ratio with the antenna spacing and position.