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专利名称：HIGH-FREQUENCY PART发明人：UEJIMA, TAKANORI申请号：EP08703451申请日：20080118公开号：EP2106030A4公开日：20110629
摘要：It is an object to provide a high-frequency component in which a low-frequency-band transmission characteristic is not degraded even when impedance mismatching isgenerated by providing a SAW filter in a high-frequency-band circuit. The high-frequencycomponent includes a diplexer (1) having a high pass filter (102) and a low pass filter (101)connected in parallel to an antenna port, a high-frequency-band circuit serially connectedto the high pass filter (102), and a low-frequency-band circuit serially connected to thelow pass filter (101). A filter causing impedance mismatching is connected to the high-frequency-band circuit. The high pass filter (102) includes a first series resonant circuit(102A) and a second series resonant circuit (102B), and the resonance frequency of thefirst series resonant circuit (102A) is a trap frequency of a signal in the low-frequencyband, and the resonance frequency of the second series resonant circuit (102B) is a trapfrequency of undesired resonance generated in the transmission characteristic of thefilter of the low-frequency-band side.
申请人：MURATA MANUFACTURING CO. LTD.
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