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一、前言为了促进我国在卫星通信和电视广播方面开展新频段,我们设想:利用试收1978年4月日本发射的试验性中型广播卫星电视信号,设计一个工作于12GHz频段上的卫星电视广播接收站。对难度较大、要求较高的直径为5米的天线,12GHz的低噪混频器和12GHz的体效应振荡器等,通过予研试制掌握它。本文主要是该12GHz卫星电视广播接收站的系统设计部分。通过室内联试后,在1978年8月～10月,在烟台市烟台山作了试收。证明该站己能较稳定的工作,方案成立,参数合理,能录取清晰的采色电视图象和伴音。不过这是性能样机,若要定型生产,则还有若干可改进的进地方。
I. INTRODUCTION In order to promote our country’s new band for satellite communications and television broadcasting, we envisaged the design of a satellite television broadcast reception operating in the 12-GHz band using the pilot medium-sized broadcast satellite television signal transmitted from Japan in April 1978 station. For the more difficult, demanding diameter of 5 meters of the antenna, 12GHz low-noise mixer and 12GHz body-effect oscillator, etc., through the pre-trial to master it. This article is mainly the 12GHz satellite television receiving station system design section. After passing the indoor test, in August 1978 ~ October, Yantai Yantai Mountain made a acceptance. Proved that the station has been more stable work, the program set up, the parameters are reasonable, can take a clear color TV images and sound. However, this is a performance prototype, to shape the production, there are still some can be improved into the place.