| 摘要 |
PURPOSE:To obtain the titled circuit of simple constitution which is designed easily and has superior ultra-high frequency characteristics and a high degree of freedom of circuit packaging by providing four straight lines which cross mutually at one point at 45 deg. to one another on a dielectric substrate as axes of symmetry and then arranging a plane resonator which is symmetrical about respective axes of symmetry. CONSTITUTION:Four straight lines which are formed on the dielectric substrate 9 while crossing one another at one point at 45 deg. are used as axes T of symmetry, and a strip line 12 as a high frequency signal transmission line is connected to the center of one side 11 of a square resonator 10 as the plane resonator which is symmetrical about said axes of symmetry. When a high frequency signal is transmitted through the strip line 12 and rectangular resonator 10 is driven, almost no electric field is produced in the center of a side 15 as far as the transmission frequency is nearly equal to the resonance frequency of said square resonator 10, so the high frequency signal is not transmitted through a strip line 16; and an electric field at a side 13 has a maximum value as well as an electric field at the side 11, so that the high frequency signal is transmitted without any loss to a strip line 14 connected to the center of the side 13. |
