Matched input antenna for a portable radio

Details Matched input antenna for a portable radio Matched input antenna for a portable radio

1995-07-28

1996-12-10

Hajec, Donald T.

Communications: radio wave antennas

Antennas

With radio cabinet

343715, 343749, H01Q 124

Patent

active

055835201

ABSTRACT:
Two coils (10, 20) couple energy to and from an antenna element (30). The lengths of the hot arm coil (10) and the ground arm coil (20) are different to cause a matched input for coupling to the resulting antenna structure. In a portable radio the two coils (10) and (20) efficiently couple to the antenna element (30) without inducing currents on the housing of the portable radio.

REFERENCES:
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patent: 5420579 (1995-05-01), Urbas et al.
Kraus, J. D., Antennas, 1988, 1950, pp. 323-325.
Nakano, H. et al., "Axial Mode Helical Antennas", IEEE Transactions on Antennas and Propagation, vol. AP-34, No. 9, Sep. 1986, pp. 1143-1148.
Nakano, H. et al., "Helical Antenna with Increased Power Gain", IEEE Antennas and Propagation Symposium, Dec. 8, 1984, pp. 417-420.

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