Matching unit and receiver apparatus using the same

Details Matching unit and receiver apparatus using the same Matching unit and receiver apparatus using the same

2006-05-23

2006-05-23

Ho, Tan (Department: 2821)

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

C343S850000, C333S032000

Reexamination Certificate

active

07050016

ABSTRACT:
A matching device causes an antenna to match a receiving section arranged to receive a signal in a first frequency band and a signal in a second frequency band lower than the first frequency band. The matching device includes a first terminal arranged to be connected to the antenna, a first inductor connected between the first terminal and a first node, a second inductor connected between the first node and a ground, a first capacitor connected between the first node and a second node, a second terminal arranged to be connected to the receiving section, the second terminal being connected to the second node, and a third inductor connected between the second node and the ground. The second inductor has a capacitive impedance in the first frequency band, and has an inductive impedance in the second frequency band. This matching device can supply a signal in the second frequency band received by the antenna to the receiving section with a small loss. The antenna having a small length can receive a signal of low frequencies and long wavelengths in the second frequency band.

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