| 摘要 |
PURPOSE:To ensure the light weigth, high gain and high band for the car antenna by enclosing the basement of the top bar with the coaxial pipe with installation of the cylinder sleeve at the intermediate position and then connecting the pipe and the sleeve via the short ring to obtain the optimum value of measurements for each component element. CONSTITUTION:The basement of top bar 2 is enclosed with coaxial pipe 4, and bar 2 and pipe 4 are connected via connector 5. Then cylinder sleeve 3 is installed at the intermediate position of bar 2. And sleeve 3 is connected to pipe 4 via two upper and lower short rings 6. Then the measurements of each component element is set to the optimum value, for example, about 0.6lambda (lambda: wavelength) set for the length of sleeve 3. As a result, the light weight, high gain and high band are ensured for the car antenna. |
