Abstract: A method improves antenna matching for a node, in particular a sensor apparatus and/or actuator apparatus, of a communications network. The node is capable of radio communication and has a radio module equipped with an antenna and a transmit path and/or receive path for radio signals to be emitted and/or received. The node has a power supply apparatus, which is preferably energy self-sufficient, in particular a battery. The antenna has an impedance and in the receive situation and/or in the transmit situation in the case of adjustable matchings, preferably by use of adjustable matching networks, the signal to noise ratio associated with each matching is estimated, and a matching is selected from the different matchings for the receive mode and/or the transmit mode.

Abstract: A method improves antenna matching for a node, in particular a sensor apparatus and/or actuator apparatus, of a communications network. The node is capable of radio communication and has a radio module equipped with an antenna and a transmit path and/or receive path for radio signals to be emitted and/or received. The node has a power supply apparatus, which is preferably energy self-sufficient, in particular a battery. The antenna has an impedance and in the receive situation and/or in the transmit situation in the case of adjustable matchings, preferably by use of adjustable matching networks, the signal to noise ratio associated with each matching is estimated, and a matching is selected from the different matchings for the receive mode and/or the transmit mode.

Abstract: An apparatus, in particular a measuring device, for acquiring a consumption quantity, includes a housing, a circuit board disposed inside the housing, a communication device, and an antenna disposed on the circuit board. The communication device is adapted to transmit data at a given carrier frequency between the apparatus and an external device via the antenna. A dielectric with changeable permittivity with respect to the carrier frequency is disposed inside the housing. The circuit board and/or a metallic or metal-containing shielding device is disposed between the dielectric and the antenna and/or a minimum distance of the antenna from the dielectric is at least 30% or at least 50% of a maximum diameter of the interior of the housing.

Abstract: A method detects the surroundings of a node, in particular in the form of a sensor apparatus and/or actuator apparatus, of a communications network. The node is capable of unidirectional or bidirectional radio communication and has a radio module equipped with an antenna, a transmit path and/or receive path, and a power supply apparatus, which is preferably energy self-sufficient, in particular a battery. The surroundings are detected, preferably at repeated time intervals, on the basis of an estimate of the detuning of the antenna of the radio module.

Abstract: A method improves antenna matching for a wireless node, preferably of a sensor wireless node and/or actuator wireless node. A radio signal, or at least a portion thereof, is coupled out of the antenna and/or out of the transmit path of the wireless node. The impedance and/or the resonant frequency of the antenna is determined therefrom in the wireless node, and the impedance and/or the resonant frequency of the antenna is adjusted according to the determined impedance and/or resonant frequency by a circuit acting on the antenna.

Abstract: A method improves antenna matching for a node, in particular a sensor apparatus and/or actuator apparatus, of a communications network. The node is capable of radio communication and has a radio module equipped with an antenna and a transmit path and/or receive path for radio signals to be emitted and/or received. The node has a power supply apparatus, which is preferably energy self-sufficient, in particular a battery. The antenna has an impedance and in the receive situation and/or in the transmit situation in the case of adjustable matchings, preferably by use of adjustable matching networks, the signal to noise ratio associated with each matching is estimated, and a matching is selected from the different matchings for the receive mode and/or the transmit mode.

Abstract: A method detects the surroundings of a node, in particular in the form of a sensor apparatus and/or actuator apparatus, of a communications network. The node is capable of unidirectional or bidirectional radio communication and has a radio module equipped with an antenna, a transmit path and/or receive path, and a power supply apparatus, which is preferably energy self-sufficient, in particular a battery. The surroundings are detected, preferably at repeated time intervals, on the basis of an estimate of the detuning of the antenna of the radio module.