多少年来，我们设计的中波天线一直都采用底部绝缘的拉线塔作为发射体，虽有其优点，但在低频、大功率时，由于塔较高，还要加笼子，使得底部压力很大，底座绝缘子国内不易解决，需要进口。另外，其三方拉绳的占地面积太大，有的场地因条件限制，不好解决。总之，原有的中波天 Over the years, we designed the antenna has been using the bottom of the bottom of the insulated cable tower as a projectile, although its advantages, but at low frequencies, high power, due to the tower higher, but also cage, making the bottom of the pressure, Insulator base is not easy to solve, you need to import. In addition, the three-way drawstring area is too large, and some venues due to conditions, not good solution. In short, the original wave days