ENP Newswire -
Release date- 09102013 -
In recent years, to enhance the resolution of radar and expand the capacity of wireless communications, efforts have been focused on developing transceivers operating in the millimeter-band frequency range above 30 GHz. To raise the performance of millimeter-band transceivers and be able to produce them in mass quantities, it is necessary to use silicon-based semiconductors rather than the compound semiconductors that have been used up until now. The problem, however, has been the difficulty of generating low-noise signals in the millimeter band.
This technology is expected to make a significant contribution to raising the performance - and enabling the mass production - of automotive radars and other millimeter-band transceivers. A portion of these results were obtained through 'Advanced Research on 79GHz-band Radar Systems,' a research program commissioned by
Details on this technology will be announced at the
In recent years, to enhance the resolution of radar and expand the capacity of wireless communications, efforts have been focused on developing transceivers operating in the millimeter-band frequency range above 30 GHz. For the high frequency integrated circuits (ICs) used to send and receive millimeter-band signals, compound semiconductors, whose physical properties are well-suited to high frequency applications, are being used.
To integrate the features of a signal-processing circuit on a single chip, raise its level of performance, and enable it to be mass manufactured, however, silicon is more suitable than compound semiconductors. That is why research efforts have focused on creating millimeter-band transceiver ICs using silicon semiconductors.
Millimeter-band transceiver ICs need a signal-generating circuit to generate millimeter-band signals. Conventional millimeter-band signal-generating circuits compare the low frequency comparator signals, which are divided from the frequency of millimeter-band oscillator signals, to the low-noise, highly stable reference signals from the reference oscillator. They then synchronize these two signals to generate low-noise, highly stable signals.
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