Antenna-matching device, antenna device and mobile communication terminal

An antenna-matching device includes a first antenna terminal that is connected to a first radiating element, a second antenna terminal that is connected to a second radiating element, power feeding terminals and that are connected to a power-feeding unit C, an antenna coupling circuit (coupling indu...

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Bibliographische Detailangaben
Hauptverfasser:	Ishino Satoshi, Kato Noboru
Format:	Patent
Sprache:	eng
Schlagworte:	ANTENNAS, i.e. RADIO AERIALS BASIC ELECTRIC ELEMENTS BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS RESONATORS RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE TRANSMISSION WAVEGUIDES
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Beschreibung
Zusammenfassung:	An antenna-matching device includes a first antenna terminal that is connected to a first radiating element, a second antenna terminal that is connected to a second radiating element, power feeding terminals and that are connected to a power-feeding unit C, an antenna coupling circuit (coupling inductance element L) that is connected in series between the antenna terminals, and a matching unit B that is connected between the antenna terminals and the power feeding terminals. The coupling inductance element L and the matching unit are integrally provided in a substrate. The matching circuit B is connected in series with the signal lines and includes a first resonant circuit and a second resonant circuit that have different resonant frequencies from each other and are coupled with each other. The matching unit B is connected to a power-feeding circuit that includes an RF circuit.