Recently, the Fujian Provincial Earthmoving Machinery Standardization Technical Committee and the Fujian Provincial Semiconductor Light-Emitting Device (LED) Application Product Standardization Technical Committee were established in Xiamen. Â
The main rod of the log-periodic antenna is two parallel thin-walled square metal tubes, which are fixedly connected by splint and installed on the bracket through horseshoe bolts. The bracket is fixed on the strut, and the steel cable is connected to the sliding sleeve on the strut. The strut is inserted into the user support rod. The antenna vibrators are paired in pairs and fastened on the outside of the two main rods by the clamping frame. The high-frequency coaxial cable passes through the main rod. There is a sealing plug at the joint to seal and inner, and the outer conductor connector connects the cable shielding wire and core wire with the main rod wall. The antenna can be adjusted freely in three-dimensional space. Compared with similar antennas, the length is shortened by nearly half. It is easy to set up, install, adjust, transport and low cost.
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It is reported that after the establishment of the above two standardization technical committees, they will work hard to formulate a number of national standards, industry standards and local standards that are urgently needed for the development of the equipment manufacturing industry and the LED industry, and solve the problem of gaps in relevant product standards as soon as possible. "Longer national standards and industry standards are revised. 
