Abstract: Mobile phone terminal, having a transmitter stage, a receiver stage and an antenna switch-over and adapter stage which each have an arrangement of passive structural elements, which arrangement is assigned a multiplicity of electrostatic-mechanical microswitches or microrelays and which can be programmed by actuating a predetermined configuration of the microswitches or microrelays in, in each case, at least one functional parameter, in particular the frequency characteristic, and a programmable control unit.

Abstract: Method and apparatus for high-efficiency radio frequency (RF) power amplification. A method high-efficiency RF power amplification comprises receiving control and power signals, sampling power output of a main stage amplifier, comparing sampled amplifier output power with output power requirement information, reconfiguring bias of the cascaded amplifiers based on power adjustment information, coupling the output of a main stage power amplifier to a load mismatch protection circuit. An electronic apparatus for a Doherty-type high-efficiency RF power amplifying subsystem comprising a power interface circuit coupled to a bias network control circuit, an output power sampling circuit, the comparator comparing signal representing amplifier output power with the power control signal, the bias network control circuit adapts bias condition of the amplifier block, a load mismatch protection circuit provides well-controlled load, thereby the amplifier block amplifies RF input signal transmitted to the subsystem output.

Abstract: Mobile phone terminal, having a transmitter stage, a receiver stage and an antenna switch-over and adapter stage which each have an arrangement of passive structural elements, which arrangement is assigned a multiplicity of electrostatic-mechanical microswitches or microrelays and which can be programmed by actuating a predetermined configuration of the microswitches or microrelays in, in each case, at least one functional parameter, in particular the frequency characteristic, and a programmable control unit.

Abstract: A programmable mobile phone terminal includes a transmitter stage, a receiver stage, a switch-over and adapter stage having an arrangement of passive structural elements connected to a plurality of microswitches or microrelays programmed by a predetermined configuration in at least one functional parameter, and a control unit associated with the transmitter stage and the receiver stage, for setting predetermined values of the functional parameter.

Abstract: Crosstalk is eliminated in a transceiver which is operated in a frequency-division-multiplex full duplex mode. The technique is suitable in particular for what is referred to as software-defined telecommunications equipment. The frequency division multiplex transceiver has a baseband block, a transmit path and a receive path which respectively transmit and receive on different frequencies (full duplex mode). Furthermore, an auxiliary transmit path is provided which is connected to the receive path and which adds to the received signal a signal whose phase is shifted by 180° with respect to the phase of the crosstalk portion in the first receive path at the summation or superimposition point and which has the same frequency range as the transmit signal. The auxiliary transmit path is driven here, independently of the first transmit path, by the baseband block so as to minimize the crosstalk sensed by the baseband block.

Abstract: A tunable high-frequency capacitor includes first and second fixed electrodes, the first fixed electrode having a high-frequency input connection, and the second fixed electrode having a high-frequency output connection. A movable electrode is arranged facing and spaced apart from the fixed electrodes and is supported by means of a suspension which causes a displacement of the movable electrode in relation to the fixed electrode depending on a control signal that is applied.

Abstract: A tuneable high-frequency capacitor includes first and second fixed electrodes (102a, 102b), the first fixed electrode (102a) comprising a high-frequency input connection (114), and the second fixed electrode (102b) comprising a high-frequency output connection (118). A movable electrode (104) is arranged facing and spaced apart from the fixed electrodes (102a, 102b) and is supported by means of a suspension (106, 108) which causes a displacement of the movable electrode (104) in relation to the fixed electrodes (102a, 102b) depending on a control signal that is applied.