| 摘要 |
PROBLEM TO BE SOLVED: To configure a communication terminal device capable of suppressing deterioration in communication performance independently of a positional relation (especially, an angle relation) with a communication partner, and of achieving communication with the communication partner over a wide angle range.SOLUTION: A ground conductor as a plate-like conductor is provided on an inner layer of a circuit board 20. On a front face and a rear face of the circuit board 20, various electronic components for configuring a mobile communication terminal are mounted as well as a feeder circuit connected with an antenna coil 21. The antenna coil 21 is mounted in a state where a first principal surface MS1 of a magnetic body core 8 is opposed to the circuit board 20. The antenna coil 21 is arranged so that a first conductor portion 11 of a coil conductor 9 is located at a position closer to the ground conductor GND compared with a second conductor portion 12. Further, the antenna coil 21 is arranged so that the first conductor portion 11 of the coil conductor 9 is located in the vicinity of an end part E (a part that becomes an upper end part in a state where an a communication terminal device is held in a vertically long direction) in a longitudinal direction of a housing 200.SELECTED DRAWING: Figure 4 |
