| 摘要 |
A wireless communication antenna is provided to enlarge a bandwidth and to reduce an electrical length of the antenna by a coupling of a pole metal and a sleeve. In a wireless communication antenna(50b), a pole metal(10b) mounted on a terminal performs a feeding of a signal and a role of the first radiation. A sleeve(20b) made of a conduction material and fed from the pole metal(10b) performs a role of the second radiation by being extrapolated with a predetermined space. A cover protects the pole metal(10b) and the sleeve(20b). And, a receiving hole(22b) formed extendedly from an upper part of the sleeve(20b) has a diameter smaller than a diameter of the sleeve(20b).
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