Abstract: An antenna for a mobile transmitter and/or receiver device suitable for a hand-held transmitter/receiver for a wireless microphone includes a monopole or dipole antenna element for the excitation of a monopole or diopole and an additional antenna element for the excitation of a parallel line mode.

Abstract: An antenna for a mobile transmitter and/or receiver device suitable for a hand-held transmitter/receiver for a wireless microphone includes a monopole or dipole antenna element (12) for the excitation of a monopole or dipole and an additional antenna element (13) for the excitation of a parallel plate line mode.

Abstract: A method for producing and detecting a transmit signal for frequency-modulating (FM) audio transmission systems, in particular for audio radio transmission systems, includes transmitting a first signal component (useful signal) that comprises audio information, and transmitting a second signal component (additional signal) that contains status information and/or control information, wherein after FM demodulation, the second signal component comprises main spectral components below the audio information useful spectrum in the baseband of the transmit signal. This method can be achieved using a circuit including a programmable phase locked loop (PLL) that determines a transmit frequency, whose divider and/or counter register is periodically reprogrammed by a microcontroller in such a way that the unmodulated carrier of the transmit frequency is periodically deflected from its fundamental frequency.