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A Dual-passband Waveguide Filter with Canonical Structure for Ka band Satellite Applications
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- Authors
- Man Seok Uhm, Ju Seop Lee, In Bok Yom, Jeong Phill Kim
- Issue Date
- 2006-07
- Citation
- Microwave Journal, v.49, no.7, pp.90-105
- ISSN
- 0192-6225
- Publisher
- Horizon House Pub.
- Language
- English
- Type
- Journal Article
- Abstract
- This article presents the implementation techniques of a 6-pole dual-passband waveguide filter with asymmetric canonical structure for Ka band satellite applications.Asymmetric canonical structure is chosen not only to increase the transmission zeros of dual-passband filters but also to get high isolation between input and output coupling elements. Very effective nonlinear equations to obtain the coefficient of a transfer function from coupling matrix are extracted for synthesizing a filter network. A appropriate equivalent circuit model for asymmetric canonical structure is proposed to design a filter. For validation of the proposed implementation approaches, a 6-pole dualmode dual-passband filter for Ka band satellite applications is realized. Very good agreement between the measured and computed responses is obtained.
- KSP Keywords
- Coupling Matrix, Ka band satellite, Nonlinear equations, Output coupling, Satellite applications, Waveguide filter, coupling elements, dual-passband, equivalent circuit model(ECM), high isolation, input and output