Abstract: Methods and apparatus are proposed for computing a power reduction policy to control radio emissions of a base station over a time window, with the objective to keep the time-averaged radio emissions over the time window below an authorized value set by regulations, with minimum impact on the performance of the overall system. The time window is subdivided into a plurality of time periods starting at a plurality of time steps, and the policy control comprises, at least at a first time step in the time window: generating a predicted average radio emissions over subsequent time periods in the time window, based on radio emissions historical data; finding couples of values of a power reduction factor and an average radio emissions that minimize a cost function for each time step in the time window, based on the predicted average radio emissions.

Abstract: The present subject matter relates to a method for controlling radio frequency, RF, emissions, including maintaining a number of power units below a maximum number within a time interval, wherein a power unit of the power units is indicative of an amount of radiated power for transmission of data. A data element to be transmitted may be received during the time interval. A number of the power units representing an amount of radiated power for the transmission of the data element may be determined. The data element may be transmitted depending on the current maintained number of power units and the determined number. The current maintained number of power units may be decreased by the determined number of power units if the data element is transmitted.

Abstract: It is disclosed a wireless sensing device comprising a vibration sensor configured to detect a mechanical vibration and to generate an electric signal in response to the mechanical vibration. The device also comprises a transceiver suitable for establishing a wireless connection between the wireless sensing device and a remote device. The transceiver is configured to receive at least a portion of the electric signal from the vibration sensor and, depending on the intensity of electric signal portion, to switch on and transmit a radio signal to the remote device. The radio signal is suitable for triggering a consequent action at the remote device.

Abstract: The present invention relates to a fixed transmitting station of a wireless telecommunication system comprising: antenna means (104, 106, 108) measurement means (110, 112) for electromagnetic field measurements of an electromagnetic environment of the antenna means, means (112, 118, 116, 120, 122) for transmitting of data being indicative of a measurement result to a central control unit (124).

Abstract: The present invention relates to a fixed transmitting station of a wireless telecommunication system comprising:

Abstract: The antenna of this device is of the slot loop type. A conductive layer is deposited on the bottom surface of its substrate to reflect the waves transmitted or received by the resonating structure of the antenna. It is isolated from this structure to prevent parallel-plate resonance modes from being set up. A separator layer is fixed under the conductive layer to protect it from any capacitive coupling with other components of the device. It may be made of an insulating rigid foam. The invention applies to making a radiotelephone system.

Abstract: An antenna has a patch with a rear edge provided with a short circuit enabling a quarter-wave resonance to be established. A half-wave resonance can also be established between two lateral edges of the patch. The same coupling device couples the antenna to a transmitter or receiver for each of the two resonant frequencies. It includes a coupling strip penetrating the patch between the edges of a slot extending from one lateral edge. The antenna is particularly applicable in dual mode mobile telephone system using GSM and DCS standards.

Abstract: A microstrip antenna includes a composite short-circuit consisting of two conductive strips. A vertical strip, in the plane of the short-circuit between the two strips, is connected to the central conductor of a coupling line forming part of the antenna and enabling the coupling with a resonance thereof, as for example to excite such resonance. The short-circuit and the vertical strip constitute two terminals for said antenna, enabling it to be easily connected to a signal processing units, such as a transmitter. The antenna described includes two zones enabling it to operate at two frequencies. The antenna has particular utility in portable telephones and their base stations.

Abstract: A multifrequency microstrip antenna in accordance with the present invention includes two zones connected to a short-circuit consisting of two conductive strips. These zones are sufficiently decoupled from each other to enable two resonances to be established in two respective different areas formed by the zones. The resonances are at least approximately of the quarter-wave type and each has an electric field node fixed by the short-circuit. The same coupling device is used to excite the two resonances. The invention applies in particular to portable telephones and to their base stations.

Abstract: A quarter-wave antenna includes a patch and a ground respectively formed on the two surfaces of a substrate and mutually connected by a short-circuit. A coupling strip enters the patch via said short-circuit. It extends in the patch between two lateral slots and is connected thereto at an internal point to enable resonance of the antenna to be excited. According to the invention, the lateral slots are sufficiently narrow for a lateral coupling effect to contribute to excitation of the antenna from the edges of the strip. The invention applies in particular to mobile telephones.

Abstract: Protection means (6, 18) are associated with the radiating system (16) of a transmitter constituting a radiotelephone (4). The purpose of the protection means is to reduce the amount of radiation that is intercepted, i.e. the proportion of the emitted radiation (20) that is intercepted by the body of the user (2), so as to enable the overall power of the radiation to be increased. In accordance with the invention, said protection means include a casing (18) ensuring that safe distances (33, 34, 35) are maintained between the radiating system and the body of the user. The protection means further include a screen (6) that absorbs the radiation. The invention applies in particular to long-range radiotelephones.