Digital terrestrial broadcasting antennas -4-Plane synthesis pattern and gain improvement-

This paper is 4-element modified with reflector as an antenna for digital terrestrial broadcasting. The element deformation batwing antenna is proposed. Input impedance obtained 50 Omega and wide-band characteristics in the simple power supply construction. In this paper, parallel combination batwing antenna of the 4-plane synthesis directionality was examined. The batwing element is arranged and is coupled in parallel, and the feed interval is half-wave length. Simple power supply construction and high-gain and wide-band characteristics were obtained by choosing the wavelength. This antenna is sufficiently usable also as the transmitting antenna for digital terrestrial broadcasting and a transmitting antenna of other repeater stations is thought.