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June 2008 [Components] Coupled Stubs Support Microstrip Bandbass Filter Filters are essential in separating and sorting signals in communications systems. Filters are essentially two-port networks that can modify the frequency response of a communications system. In some applications, such as communications satellites and mobile communications devices, it is critical that filters be designed with small size and light weight. Planar filter geometries are well suited for meeting these requirements. The approach presented... April 2006 [Components] Microstrip Filters Provide High Harmonic Suppression Harmonic filters are invaluable for removing unwanted higher-order harmonic signals from microwave multipliers and mixers in receiver designs, among other applications. Although a variety of filter configurations have been developed to reduce the level of harmonic signals, the authors investigated two varieties of bandpass filter designed for good harmonic suppression. Parallel coupled line sections were employed in both filter approaches, with phase equalization of coupled resonators... |
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