Abstract: A signal processing device including a light source to emit light at a wavelength which is substantially equal to the carrier wavelength of an optical input signal. An optical resonator provides a filtered signal by optical filtering of the optical input signal. The optical resonator is non-matched with the carrier wavelength of the optical input signal. An optical combiner combines the filtered signal with the emitted light to form an optical output signal. The signal processing device may be adapted to recover the clock frequency of a modulated input signal. The intensity of the output signal exhibits periodic variations at the clock frequency when the resonator is adjusted at least approximately to the predetermined sideband of the modulated input signal.

Abstract: The invention relates to an antenna system, which comprises a transmitter component (1, 2, 3, 4), a reception component (4, 3, 10, 11, 12), and an antenna (5) connected to these. According to the invention, the antenna (5) is arranged to connect to different connection points (6, 7, 8) of the transmitter (1, 2, 3, 4) or the reception component (4, 3, 10, 11, 12).

Abstract: The invention relates to an electromechanical transducer and a method for manufacturing the transducer. The transducer includes a membrane (3), two electrodes (1, 2), the electric field between which can be controlled or measured, and a support structure (4, 5), on which the membrane (3) is arranged to vibrate interactively with the electric field. According to the invention, the support structure (4, 5) includes several support points (4, 5), which are aligned in such a way that several parallel vibrators are formed in the membrane (3).

Abstract: An antenna device for a mobile phone designed for operation in full duplex comprises a transceiver unit (1) having one transmitting subunit (2) and one receiving subunit (3). At least one first antenna (6) is connected to the transmitting subunit (2) via an active matching network (5). At least a second antenna (8), separate and discrete from the first antenna (6), is connected to the receiving subunit (3). In one embodiment there is also an active matching network (11) between the second antenna (8) and the receiving subunit (3). Both the first and the second antennas may comprise more than one radiating element.