“Omni-ultrawideband Antennas for Digital Satellite Receivers”

Recently, two kinds of the digital satellite receiver for radio and television have been developed as the global receiving system. The frequency bands of the satellite radio system are ranging from 1, 400MHz to 2, 600MHz, while the satellite television system are ranging from 11, 000MHz to 13, 000MHz New anti-discern antennas have been developed so that satisfies the Omni-characteristics in the horizontal directivity and approximately 45$^{\circ}$'elevation angle in the vertical directivity. These results were similar to the discern antenna except the anti-vertical directivity.