ANTENNA STRUCTURE, AND RADIO COMMUNICATION DEVICE HAVING THE STRUCTURE

摘要

A capacity feed type radiation electrode (3) is formed in a dielectric substrate (2), which is disposed in a non-ground area of a circuit substrate (5). This circuit substrate (5) is equipped, in the non-ground area, with a grounding line (7) for connecting the radiation electrode (3) and a ground electrode (6) of the circuit substrate (5). The grounding line (7) is shaped to have at least one folded portion (12). The grounding line (7) is equipped with a resonance frequency adjusting element (8) in a mode to shortcut a portion of the grounding line. The resonance frequency adjusting element (8) has a capacity or inductance for adjusting the resonance frequency of an antenna structure (1) to a set resonance frequency.