论文部分内容阅读
中波广播的传播白天主要是靠地面传播,夜晚主要是靠地面和天波传播。由于地面场强远比天波场强强,因此如何提高地面波辐射场强是广电工作者探讨的课题。本文简要介绍了中波传播途径、中波广播发射天线以及中波天线地网的建设与维护;针对中波天线地网由于地理、地质、人为以及特殊原因,存在易损等原因进行了分析,提出了采用电缆探位仪巡查中波天线地网断损点的实用性、可行性,并通过实例对电缆探位仪在中波天线地网检测中的应用进行了论述。
During the daytime, the propagation of the medium wave broadcasting mainly depends on the ground. The night mainly spreads on the ground and the sky wave. As the ground is far stronger than the skywave field, how to improve the radiation intensity of the groundwave is a topic discussed by radio and television workers. This article briefly introduces the construction and maintenance of the medium wave propagation route, the medium wave broadcast transmission antenna and the medium wave antenna ground network. The analysis of the reason that the medium wave antenna ground network is fragile due to geography, geology, man-made and special reasons, The practicality and feasibility of inspecting the broken point of the medium wave antenna by using the cable sounding instrument are put forward. The application of the cable sounding instrument in the detection of the medium wave antenna is also discussed through an example.