Terrestrial broadcast wave reception-use antenna device and component of same
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United States of America Patent
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Jan 24, 2017
Grant Date -
Sep 4, 2014
app pub date -
Jan 30, 2012
filing date -
Jan 31, 2011
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Abstract
Provided is a terrestrial broadcast wave reception-use antenna device having performance that is equivalent to or better than that of a conventional device in frequency bands at or below an FM band even if an antenna element length is shortened to approximately 55 [mm]. An amplifier (12-A) is configured so as to include a compound semiconductor HEMT for amplifying a received wave having a frequency at or below a resonant point of an antenna element (10) among received waves of the antenna element (10), the compound semiconductor HEMT having an equivalent noise resistance of 2 [Ω] or smaller for the received frequency so that a noise figure (NF) is approximately constant over a wide frequency band at or below the FM band.
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