| Investigation of new low-loss and high-power SAW filters for reverse-frequency-allocated cellular radios. | |
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MedLine Citation:
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PMID: 18263176 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Japanese cellular radios employ reverse frequency-allocations of the transmitter and receiver frequency bands. A rather narrowband surface acoustic wave (SAW) transmitter prefilter and a new type of SAW low-loss and high-power transmitter final stage filter-dual configurations to previously developed US cellular radio system filter-have been developed. The dual configurations provide the stopbands for the filter at the lower side of the pass bands, which is a requirement for reverse frequency-allocation systems. Design procedures, including those for the piezoelectric substrates and the experimental results obtained for the filters of 1.5 dB low insertion-loss and over 30 dB stop band rejection at 920 MHz, are also presented. In addition, the frequency characteristics of the SAW antenna duplexer module used in Japanese new common carrier (NCC) systems are discussed. |
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Authors:
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M Hikita; T Tabuchi; N Shibagaki |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: IEEE transactions on ultrasonics, ferroelectrics, and frequency control Volume: 40 ISSN: 0885-3010 ISO Abbreviation: IEEE Trans Ultrason Ferroelectr Freq Control Publication Date: 1993 |
Date Detail:
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Created Date: 2008-02-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9882735 Medline TA: IEEE Trans Ultrason Ferroelectr Freq Control Country: United States |
Other Details:
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Languages: eng Pagination: 224-31 Citation Subset: - |
Affiliation:
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Hitachi Ltd., Tokyo. |
Export Citation:
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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