利用并联加载与补偿网络技术提高中波天调网络带宽及稳定性的应用探讨

Discussion on Application of Parallel Loading Technology and Compensation Network Technology to Improve Bandwidth and Stability of MW Antenna Tuning Network

我们在调试新建76m绝缘自立塔的三频共塔网络时,发现在603kHz的频点处的Q值较大,造成整个网络工作稳定性差,带宽小。经多方论证,我们决定尝试采用并联加载与补偿网络技术方案共同解决。实践中,通过对原有76m绝缘铁塔加装设备,反复调整相关参数,我们实现提高发射天线输入阻抗,降低特定频点Q值,延展了工作带宽,增强天调网络稳定性。为解决中波天调网络工作可靠性提供了新思路。

When debugging three-frequency common tower network of 76 m insulated self-standing tower, the paper found that Q value at frequency point of 603 KHz is large, which causes overall network poor stability and low bandwidth. After multi-party demonstrations, the paper decided to try to solve the problem by using parallel loading and compensation network technology solutions. In practice, by adding equipment to original 76 m insulated tower, and adjusting relevant parameters repeatedly, the paper improves input impedance of transmitting antenna, reduces Q value at a specific frequency, extends operating bandwidth and enhances stability of antenna network, which provides a new idea for solving working reliability of MW antenna tuning network.