| 摘要 |
<p>The invention is a short range improved multichannel microwave distribution system (MMDS) for local television retransmission. The current MMDS systems cannot produce a satisfactory noise free signal at a low enough transmission wattage to be economic. The invention by using a single microwave frequency modulator in tandem with a power amplifier operating well below the linear/nonlinear output transition point, allows retransmission of a satisfactory noise free signal at low wattage. The improved MMDS is economic in power use and cost, and has a range of about 10 km, under favorable terrain conditions up to 13 km, at 1 watt per channel, antenna output.</p> |
