Antenna arrangement
AssigneeRobert Bosch GmbH
InventorDierk Boy
Life of this patent
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Abstract
An antenna arrangement which is used for transmitting and receiving radio signals includes a capacitively tunable loop, from which received radio signals can be coupled symmetrically into a receiver stage, and which has a feed-in point, at which a signal to be radiated by the loop can be split into two signals moving in opposite directions to each other and with the same potential. Outcoupling of the received signals from the loop into the receiver stage can take place inductively via a coupling loop, or capactively via outcoupling capacitors, which are connected with the loop.
Claims17
An antenna arrangement for transmitting and receiving radio signals, comprising a receiver stage and a capacitatively tunable loop having an axis of symmetry and including two halves arranged symmetrically relative to said axis, and a feed-in point positioned on said axis of symmetry wherein radio signals received from the tunable loop can be coupled into the receiver stage in two signal flows symmetrical to each other relative to said axis of symmetry and wherein a signal to be radiated by the tunable loop is splittable at said feed-in point into two signals flowing in two opposite directions relative to the axis of symmetry such that same potential is formed in each half of the tunable loop.
A pager comprising a paging part and an antenna arrangement, said antenna arrangement including a receiver stage, and a capacitatively tunable loop having an axis of symmetry and including two halves arranged symmetrically relative to said axis, and a feed-in point positioned on said axis of symmetry wherein radio signals received from the tunable loop can be coupled into the receiver stage in two signal flows symmetrical to each other relative to said axis of symmetry and wherein a signal to be radiated by the tunable loop is splittable at said feed-in point into two signals flowing in two opposite directions relative to the axis of symmetry such that same potential is formed in each half of the tunable loop.
Dependencies are inferred from the claim text.