| 摘要 |
PCT No. PCT/JP97/03437 Sec. 371 Date Feb. 8, 1999 Sec. 102(e) Date Feb. 8, 1999 PCT Filed Sep. 26, 1997 PCT Pub. No. WO98/24142 PCT Pub. Date Jun. 4, 1998A flat antenna unit for a mobile communication equipment which is pasted on the mobile communication equipment so that it is touched by a human hand when in use, comprising a flexible insulated base; a receiving circuit which is formed on the flexible insulated base and which comprises three conductive layers of a pair of U-shaped conductive layers which are isolated and symmetrically disposed each other, a pair of conductive layers which have bent sections at the ends thereof and which are isolated and symmetrically disposed on the both sides of the U-shaped conductive layers, and a conductive layer which is isolated from the above-mentioned conductive layers as well as from the U-shaped conductive layers and which is located above the U-shaped conductive layer; and an insulator which is formed by potting insulating ink for example and which is coated on the receiving circuit. The flat antenna unit is characterized in that when the insulator is touched by the hand, a tuning capacitor is formed between the hand and the receiving circuit via the insulator. Thereby, the inventive antenna unit can eliminate troubles during speech like noise and interruption even when the radio efficiency is bad in using the mobile communication equipment such as a portable phone at places where the strength of electric field is weak.
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