Abstract: A circuit board of a hearing aid, in particular of a hearing aid device, has a base body to which a first electrical component and a second electrical component are bonded, more specifically are directly electrically connected by means of a conductive track. An electrically conductive, continuous antenna surface, as well as a communications receiver that is electrically connected at two different feed points to the antenna surface, are bonded to the base body. The antenna surface is partially opened between the feed points. A method describes the steps for manufacturing the circuit board and to a hearing aid having the circuit board.

Abstract: 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 t

Abstract: An Integrated Antenna for Mobile Telephones A flat antenna arrangement (plate antenna arrangement, patch antenna arrangement) with an earth plate (2) and a radiator (3) which is arranged at a distance from and substantially in parallel to the earth plate (2) and at one of its end zones is conductively connected to the earth plate), wherein at a first (lower) resonant frequency of the antenna arrangement (1) a voltage minimum occurs at the connection point of the radiator to the earth plate (2) and a first voltage maximum occurs in the region of the other end (free end) of the radiator, and at a further, higher resonant frequency, a voltage minimum and a second voltage maximum occur respectively at the foresaid ends of the radiator (3), and that the region of the free end (6) of the radiator is capacitively coupled to another point (7) of the radiator such that the further resonant frequency is reduced relative to three times the value of the first resonant frequency when the foresaid capacitive coupling is pr

Abstract: An antenna arrangement with an earth plate with a plurality of radiators which are arranged in parallel to the earth plate at a distance therefrom, where the radiators for covering a given frequency range have a similar length and are adjacent and parallel to one another, a first terminal of each radiator is arranged in the region of the respective one end of each radiator and is connected to the earth plate via a first connection, the said first connections are closely adjacent to one another or coincide, and a second terminal for a feed line is provided on reach radiator at a distance from its first terminal, wherein the radiator has the form of a flat loop comprising two closely adjacent, long conductors which are connected at adjacent ends by a short conductor, and the second terminals are provided in the region of the respective other end of each radiator, and that the total length of each individual radiator corresponds approximately to ½ wavelength in the given frequency range.

Abstract: A flat antenna arrangement (plate antenna arrangement, patch antenna arrangement) with an earth plate (2) and a radiator (3) which is arranged at a distance from and substantially in parallel to the earth plate (2) and at one of its end zones is conductively connected to the earth plate), wherein at a first (lower) resonant frequency of the antenna arrangement (1) a voltage minimum occurs at the connection point of the radiator to the earth plate (2) and a first voltage maximum occurs in the region of the other end (free end) of the radiator, and at a further, higher resonant frequency, a voltage minimum and a second voltage maximum occur respectively at the foresaid ends of the radiator (3), and that the region of the free end (6) of the radiator is capacitively coupled to another point (7) of the radiator such that the further resonant frequency is reduced relative to three times the value of the first resonant frequency when the foresaid capacitive coupling is present.

Abstract: 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 t