Extra antenna element

Details Extra antenna element Extra antenna element

1996-06-03

1998-09-08

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With radio cabinet

343791, 343846, 343895, H01Q 124

Patent

active

058051120

ABSTRACT:
A method and an arrangement uses an extra member intended to be connected to the ordinary grounding plane system of an antenna through a portion a the coaxial input terminal sleeve being present outside the case of an apparatus. The extra member is tuned in such a way that it preferably operates as an electrical quarter-wave radiator in a range at the upper limit of a designed operating frequency range, while the remaining effective grounding plane system of the antenna is preferably tuned to a frequency in a range at the lower limit of the intended operating frequency range, where, for instance, a portable radio telephone should operate, to in this way obtain an increased bandwidth and a reduced influence of immediate surrounding environment of the antenna of the portable equipment.

REFERENCES:
patent: 2805414 (1957-09-01), Taylor
patent: 3932873 (1976-01-01), Garcia
patent: 4138681 (1979-02-01), Davidson et al.
patent: 4442438 (1984-04-01), Siwiak et al.
patent: 4494122 (1985-01-01), Garay et al.
patent: 4543581 (1985-09-01), Nemet

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