| 摘要 |
<p>An optical distribution system is used for a signal to be transmitted at radio frequencies, for example to mobile telephone users. High frequency (LO) and Intermediate Frequence (IF) signals are modulated onto optical supercarriers. The optical signals are distributed via an optical network to one or more remote sites. An integral mixer/detector at the remote site both mixes the signals and converts them to the electrical domain, thereby generating the RF electrical signal required for transmission. In a preferred embodiment, the mixer/detector is a Heterojunction Bipolar Transistor.</p> |
