Antenna apparatus
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United States of America Patent
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Dec 5, 2023
Grant Date -
N/A
app pub date -
May 19, 2021
filing date -
Dec 28, 2018
priority date (Note) -
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Abstract
An antenna apparatus includes first and second antennas. First and second radiating elements include parallel extending portions. A first coil is connected between the first radiating element and a first feed circuit connection portion. A second coil is connected between the second radiating element and a ground conductor. The first and second coils are coupled to each other in additive polarity. A phase adjustment circuit adjusts a phase difference between currents respectively flowing through the first and second radiating elements to greater than or equal to about 90 degrees and less than about 180 degrees in a communication frequency band of the second antenna. Where a frequency of a fundamental of the first radiating element is f1 and a frequency of a fundamental of the second radiating element is f2, f1>f2, and 3f2−f1>f1−f2 are satisfied.
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