| 摘要 |
PROBLEM TO BE SOLVED: To obtain a radio communication device which can take a matching for any load impedance, and sets a wide band in an operating frequency band even when an input impedance of an IC chip cannot be freely selected. SOLUTION: This radio communication device is provided with: a ground conductor 1; a radiation conductor 2 disposed substantially in parallel to the ground conductor 1; conductors 3a and 3b short-connected to the ground conductor 1; capacitive coupling means 4a and 4b disposed near the conductors 3a and 3b; and an IC chip 5 having a send/receive function of radio waves. The conductors 3a and 3b are disposed near or inside an area pinched between the ground conductor 1 and the radiation conductor 2, and as the IC chip 5 is connected to between the conductor 3a and the conductor 3b through the capacitive coupling means 4a and 4b, when considering an equivalent circuit, an inductance L in the equivalent circuit is adjusted by the conductors 3a and 3b, and a capacitance C is adjusted by the capacitive coupling means 4a and 4b. COPYRIGHT: (C)2010,JPO&INPIT |
