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三频共塔技术是使用一座发射天线同时发射三套不同频率的广播节目。在发射频率多、占地条件满足不了安装发射天线的发射台,该技术的应用,不但能解决多频率发射问题,同时还能节省大量的资金和土地面积。周口中波台原有120米的拉线塔一座,工作频率为1098k Hz(25k W)和900k Hz(10k W),双频共塔。现新增一部603k Hz(25k W)发射机。通过计算,各个频率之间的比值均大于1.25,符合共塔的条件。进行了三频分馈共塔,通过增加和调整阻塞网络、陷波网络,使三个单通道网络合并成一个完整的三频共塔天调网络,达到了预期效果。
Tri-band common-tower technology is the use of a transmitting antenna while transmitting three different frequencies of radio programs. The application of this technology can not only solve the problem of multi-frequency transmission but also save a lot of money and land area while transmitting more frequencies and occupying conditions can not meet the transmitting station with the transmitting antenna installed. Zhoukou Zhongbo Taiwan’s original 120m cable tower, operating frequency of 1098k Hz (25k W) and 900k Hz (10k W), dual-frequency tower. A new 603k Hz (25kW) transmitter is now available. Through calculation, the ratio between the various frequencies are greater than 1.25, in line with the conditions of a total tower. A tri-frequency co-fed tower was constructed. By adding and adjusting the blocking network and the notch network, the three single-channel networks were merged into a complete tri-frequency common-sharing network, which achieved the expected results.