| 摘要 |
In an inverted F pattern antenna apparatus including a first antenna element and having an electrical length of a quarter wavelength of a first resonance frequency, a folded antenna element and a second antenna element are provided at an end portion of the first antenna element. A length having an electrical length obtained by adding the electrical length of the further provided antenna elements to the electrical length of the inverted F pattern antenna apparatus is set to an electrical length of a quarter wavelength of a second resonance frequency, then resonance is achieved at the second resonance frequency, thereby configuring the antenna apparatus having two resonance frequencies.
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