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US 2001/0054979 A1Published application
Antenna arrangement for mobile radiotelephones
AssigneeAlcatel
InventorsAchim Bahr, Dirk Manteuffel, Jose Marie Baro
Life of this patent
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AssigneeAlcatel
InventorsAchim Bahr, Dirk Manteuffel, Jose Marie Baro
Estimating the term…
A flat antenna arrangement (plate antenna arrangement, patch antenna arrangement) with an earth plate and a radiator that is disposed at a distance essentially parallel to the earth plate and is conductively connected to the latter by one of its end regions, wherein, at a first (lower) resonant frequency of the antenna arrangement, a voltage minimum is present at the connection of the radiator to the earth plate and in the region of the other end (unsupported end) of the radiator a first voltage maximum is present, is characterized in that there is disposed between the radiator (3) and the earth plate (2) near the unsupported end of the radiator (3) a settable switch element (11) that is designed in such a way that it is capable of making a connection having a low impedance, and in that the point at which the switch element is connected to the radiator (3) is disposed in such a way that, with the switch element (11) set to conduct, the radiator (3) has a desired second resonant frequency that is higher than the first resonant frequency. It is advantageous that the entire or almost the entire radiator radiates in the two frequency ranges.
Antenna arrangement (flat antenna arrangement, plate antenna arrangement, patch antenna arrangement) with an earth plate and a radiator that is disposed at a distance essentially parallel to the earth plate and is conductively connected to the latter by one of its end regions, wherein, at a first (lower) resonant frequency of the antenna arrangement, a voltage minimum is present at the connection of the radiator to the earth plate and in the region of the other end (unsupported end) of the radiator a first voltage maximum is present, disposing between the radiator and the earth plate near the unsupported end of the radiator a settable switch element that is designed in such a way that it is capable of making a connection having a low impedance, and connecting the point at which the switch element to the radiator is disposed in such a way that, with the switch element set to conduct, the radiator has a desired second resonant frequency that is higher than the first resonant frequency.
Antenna arrangement according to one of the preceding claims, wherein the radiator essentially has the configuration of a C.
Flat antenna arrangement (plate antenna arrangement, patch antenna arrangement) with an earth plate and a radiator that is disposed at a distance essentially parallel to the earth plate and is conductively connected to the latter by one of its end regions, wherein, at a first (lower) resonant frequency of the antenna arrangement, a voltage minimum is present at the connection of the radiator to the earth plate and in the region of the other end of the radiator a first voltage maximum is present, wherein the radiator has essentially the shape of a meander or of a plurality of consecutive conductor sections disposed in a zigzag shape, at a further, higher resonant frequency, a voltage minimum or a second voltage maximum, respectively, is present at the said ends of the radiator, and in that such a point of the radiator is capacitively coupled to the earth plate so that the further resonant frequency is reduced with respect to three times the value of the first resonant frequency.
Hand-held radio set, including transceivers, for at least one of the following purposes:
Dependencies are inferred from the claim text.