Double-frequency filter
A filter and resonance technology, applied in waveguide devices, electrical components, circuits, etc., can solve the problem of large overall footprint, high insertion loss in the passband, and difficulty in meeting low cost, small size, light weight and high performance etc. to achieve the effects of compact structure, high out-of-band rejection, and filtering out unwanted signals and noise signals
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[0036] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0037]The design methods of the traditional dual-band filter include: (1) by introducing a transmission zero in the single-passband filter, the single-passband is divided into double-passbands, the filter structure is complex, and the design is difficult; (2) using a ladder Impedance dual-mode characteristic design dual-passband filter, each passband of the filter is difficult to control independently; (3) The dual-passband filter is realize...
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