A very small dielectric planar filter for portable telephones

A very small dielectric planar filter for portable telephones

A high performance, high-dielectric stripline filter with the size of 4.5 mm/spl times/3.2 mm/spl times/2.0 mm has been developed. The filter consists of planar resonators and its structure is made of high permittivity multilayer ceramic in the Bi-Ca-Nb-O system. The performance is distinctive with...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 1994-11, Vol.42 (11), p.2017-2022
Hauptverfasser: Ishizaki, T., Fujita, M., Kagata, H., Uwano, T., Miyake, H.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Attenuation
Band pass filters
Capacitors
Ceramics
Circuit properties
Dielectrics
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Nonhomogeneous media
Permittivity
Resonator filters
Stripline
Telephony
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Zusammenfassung:A high performance, high-dielectric stripline filter with the size of 4.5 mm/spl times/3.2 mm/spl times/2.0 mm has been developed. The filter consists of planar resonators and its structure is made of high permittivity multilayer ceramic in the Bi-Ca-Nb-O system. The performance is distinctive with its attenuation pole. An equivalent lumped circuit is derived to explain the behavior of the attenuation pole quantitatively. A precise design procedure is also described.< >
ISSN:0018-9480
1557-9670
DOI:10.1109/22.330112