SURFACE MOUNT ANTENNA, FREQUENCY CONTROL AND SETTING METHOD FOR DUAL RESONANCE THEREFOR AND COMMUNICATION EQUIPMENT PROVIDED WITH SURFACE MOUNT ANTENNA

摘要

PROBLEM TO BE SOLVED: To easily widen a frequency band. ;SOLUTION: Each electric field areas Z1 and Z1 of a power feeding radiation electrode 3 and a parasitic radiation electrode 4 are adjacently located with an interval, and each high current areas X1 and X2 of the power feeding radiation electrode 3 and the parasitic radiation electrode 4 are adjacently located with an interval. Besides, a meandering pattern 9 is connected to a power feeding terminal 5 of the power feeding radiation electrode 3. By variably controlling the interval H1 between each electric field areas Z1 and Z1 and the capacitance between each of opening terminals 3a and 4a of the power feeding radiation electrode 3 and the parasitic radiation electrode 4 and the ground, coupling of electric fields between the electric field areas Z1 and Z1 is variably controlled. And by variably controlling the interval H2 between the each high current areas X1 and X2 and the inductance of the meandering pattern 9, coupling of magnetic fields between the high current areas X1 and X2 is variably controlled so that coupling of both electric fields and magnetic fields can be set to a state suitable to dual resonance. Thus, satisfactory dual resonance can be attained.;COPYRIGHT: (C)2001,JPO