Communications: radio wave antennas – Antennas – Fractional – multiple – or full wave length linear type
Patent
1997-10-31
1999-12-21
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Fractional, multiple, or full wave length linear type
343790, 343876, H01Q 2110
Patent
active
060055308
ABSTRACT:
A switched gain antenna array comprising a plurality of dipole elements disposed in series with a phasing stub coupled between adjacent ones of the dipole elements. An antenna feed line is coupled to a first one of the dipole elements to couple the RF signals into and out of the plurality of dipole elements. The phasing stubs are adapted to adjust phase of the RF signals provided to each of the dipole elements so that the dipole elements operate in phase. A switch is disposed between the first one of the dipole elements and a second one of the dipole elements. The switch is adapted to disconnect the first one of the dipole elements from remaining ones of the dipole elements during transmit operations of the antenna array and to connect each of the dipole elements together during receive operations of the antenna array. As a result, the antenna array has greater gain during receive operations than during transmit operations.
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Analysis of Coaxial Collinear Antenna: Recurrence Formula of Voltages and Admittances at Connections by Sakitani et al., IEEE Transactions On Antennas And Propagation, vol. 39, No. 1, Jan. 1991.
Jovanovich Alan F.
Mensonides John W.
Warren Bruce G.
Intermec IP Corp.
Wimer Michael C.
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