Loop antenna with impedance matching

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United States of America Patent

PATENT NO 8736500
SERIAL NO

12536256

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Abstract

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An antenna apparatus that has a base and an antenna element with a balanced RF output, which receives RF signals within a first band of frequencies. The apparatus includes a mount engaged with the base that rotatably supports the antenna about an axis of rotation. The apparatus has a balun with a balanced RF input and an unbalanced RF output. A feed line is coupled between the balanced RF output and the balanced RF input. The feed line includes two electrical conductors that have a predetermined length and that are aligned substantially in parallel, and supportively spaced apart a predetermined distance by plural insulators. The feed line is further arranged to maintain the predetermined distance between the two electrical conductors as the antenna element rotates with respect to the base. The predetermined length and the predetermined distance are selected to yield a narrow range of impedances within the first band of frequencies as measured at the unbalanced RF output of the balun, which enables efficient coupling of the RF signals from the unbalanced RF output of the balun.

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Patent Owner(s)

Patent OwnerAddress
RADIOSHACK ONLINE IPCO LLC1680 MICHIGAN AVE SUITE 700 MIAMI BEACH FL 33139

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lam, Alan Man Lung Hong Kong, CN 3 48

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