LOW-PASS FILTER AND HIGH-FREQUENCY SWITCH USING THE SAME

PROBLEM TO BE SOLVED: To provide a low-pass filter with a small size and excellent performance and to provide a high-frequency switch using the same. SOLUTION: There is provided an input terminal and an output terminal, between which a first parallel resonant circuit and a second one are series-conn...

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Bibliographische Detailangaben
1. Verfasser:	FUKAMACHI KEISUKE
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS PULSE TECHNIQUE RESONATORS RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE TRANSMISSION WAVEGUIDES
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a low-pass filter with a small size and excellent performance and to provide a high-frequency switch using the same. SOLUTION: There is provided an input terminal and an output terminal, between which a first parallel resonant circuit and a second one are series-connected. The resonant frequency of the first parallel resonant circuit comprising a transmission line L1 and a capacitor C1 is set at nearly equal to a double wave of the pass band, while the resonant frequency of the second parallel resonant circuit comprising a transmission line L2 and a capacitor C4 is set at nearly equal to n times the wave of the pass band. A transmission line L4 for a shunt is connected with a connecting point of the first and second parallel resonant circuits. COPYRIGHT: (C)2005,JPO&NCIPI