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Although the BIT line has a low loss nature at millimeter-wave frequencies, it may be face difficulties such as generation of unwanted modes due to happening to make asymmetrical structures in manufacturing process. For example, the dielectric-supported center conductors may be displaced for the horizontal mid-plane in the parallel metal plate housing, the dielectric substrate being fixed by spacers...
The design procedure of a wideband band-pass filter (BPF) which consists of an inter-digital finger resonator and parallel coupled lines is proposed in this paper. The design of the bandwidth was described by using the even and odd mode characteristic impedances in the resonator structure. The parallel coupled line was also analyzed in the same manner. The parameters of those elements in combination...
Although Matthaei's immittance inverter formulae are usually used to design symmetrical types of filters at microwave frequencies, new design formulae should be introduced for filters with asymmetrical networks. Having this fact in mind, the asymmetrical networks were transferred to T-and ??-types equivalent circuits, and the related immittance inverter parameters were formulated by calculating F-matrixes...
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