The invention relates to a design and calculation method for an inner conductor of a quasi-
microstrip ferrite
circulator. The design and calculation method for the inner conductor of the quasi-
microstrip ferrite
circulator belongs to the technical field of communication
electronic component and
assembly design. According to the invention, a thin
copper strip is utilized to replace a
microstrip conductor evaporated at the surface of a ferrite so as to form a quasi-microstrip inner conductor. A triangular part of the inner conductor forms a shunt
inductor L0 and a
capacitor C0, three leading-out ports are mutually of 120-degree
rotational symmetry, each narrow-band line forms an
inductor LP, and each broad-band line forms a
capacitor CP. The upper surface and the lower surface of the inner conductor are closely contacted with an upper aluminum cavity and a lower aluminum cavity respectively through the ferrite, and the upper aluminum cavity and the lower aluminum cavity are connected by four screws so as to form a shunt
metal-ferrite-
metal interlayer
capacitor. The design and calculation method solves a key technological problem that the shunt
inductor L0, the capacitor C0, the inductors LP and the capacitors CP are difficult to be accurately calculated by mathematics for a long time; and a formula for calculating the
diameter D of the area of the capacitors (C0+3CP) formed by the inner conductor, the area AP of the capacitor CP formed by the broad-band line and the length lP of the inductor LP formed by the narrow-band line is derived. A calculation result relatively conforms to the reality, the
blindness in new product trial-manufacture is reduced, and the method has a push and
promotion effect for
industrial technology development.