The 60-GHz band is proposed for the radio link frequency in broad-band cellular systems. 140-155-Mb/s transmission experiments are reported with optically generated millimeter-waves at frequencies in the 60-GHz band. By applying the sideband injection locking technique, the remotely generated millimeter-wave signals depict quartz accuracy and low phase noise <-100 dBc/Hz at offset frequencies 21 MHz
Experiments on the optical generation and transmission of millimetre-wave radio signals are reported. the millimetre-wave carrier is generated by hetrodyning the signals of two semiconductor lasers at an optic/millimetre-wave converter. A 140 Mbit/s signal at a carrier frequency beyond 60 GHz was transmitted successfully with a BER below 10-9
The optical generation and transmission of microwave radio signals is important for future broadband wireless communications. For the first time, bit error ratio measurements were carried out successfully in optical multichannel and single channel transmission experiments at radio frequencies of 12 GHz and 60 GHz, respectively
Experiments are described using a photonic beam former to control a 60-GHz smart antenna. The 60-GHz signals are generated by optical heterodyning the waves of two laser diodes. Beam forming is achieved by new photonic planar lightwave circuits in silica technology. The beam former enables individual weighting of the millimeter-wave signals feeding the antenna elements. The required weights for a desired field distribution are calculated using the maximum directivity beam-forming algorithm
We present an optically controlled 60 GHz array antenna which may be used as a smart antenna in an envisaged broadband mobile communication system. The desired field patterns of the antenna were synthesized using the maximum directivity beam-forming algorithm which enables an optimum radio link to a selected mobile terminal to be created while the signals of other terminals are suppressed by the nulls of the antenna's field distribution. The 60 GHz signals were generated by optically heterodyning the signals of two laser diodes. The field distribution of the antenna was formed by a silica based photonic beam-forming network. The experimentally obtained data confirmed the calculated field patterns
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