Abstract: A sensor network (1) as well as a method for monitoring a terrain (6) is specified. The sensor network (1) has a number of fixed-position sensors (3, 3?, 3?), which can be deployed in the terrain (6), and at least one programming module (25), with the fixed-position sensors (3, 3?, 3?) each being equipped with a communication device, with the at least one programming module having a position-finding device and a programming device (25), in which case the position of the sensors (3, 3?, 3?) can be determined by the position-finding device and can in each case be applied to the sensors (3, 3?, 3?) by the programming device (25) via the communication device, and with the sensors (3, 3?, 3?) being designed such that they themselves form a network. The sensor network (1) as well as the method, which is carried out in a manner corresponding to it, for monitoring the terrain (6) require sensors (3, 3?, 3?) of simple design, and are thus associated with a cost advantage.

Abstract: A sensor network (1) as well as a method for monitoring a terrain (6) is specified. The sensor network (1) has a number of fixed-position sensors (3, 3?, 3?), which can be deployed in the terrain (6), and at least one programming module (25), with the fixed-position sensors (3, 3?, 3?) each being equipped with a communication device, with the at least one programming module having a position-finding device and a programming device (25), in which case the position of the sensors (3, 3?, 3?) can be determined by the position-finding device and can in each case be applied to the sensors (3, 3?, 3?) by the programming device (25) via the communication device, and with the sensors (3, 3?, 3?) being designed such that they themselves form a network. The sensor network (1) as well as the method, which is carried out in a manner corresponding to it, for monitoring the terrain (6) require sensors (3, 3?, 3?) of simple design, and are thus associated with a cost advantage.

Abstract: To maintain a receiving sub-system in a multiple standard communication device fully operational according to all operation modes of a second transmitting sub-system of the multiple communication device it is proposed that a multiple standard communication device of the type with parallel operation comprises a first subunit at least receiving input signals at a predetermined input level, and a second subunit at least transmitting output signals at a specific time, frequency and output level such that the output level is very large compared to the input level of the first subunit. According to the present invention the operation mode of the first subunit is modified when the second subunit is transmitting output signals.

Abstract: To effectively suppress harmonics in a dual band mobile phone with a power amplifier (10) outputting transmitting signals for different frequency bands (GSM; PCS, DCS) via a single output as described a power amplifier output circuit in which harmonics are filtered through impedance transformation of a turn-off impedance of a transmitter/receiver change over unit (36, 38). Hereby the desired filtering of harmonics may be achieved without almost no additional expenditure.