| 摘要 |
PURPOSE:To obtain a transmission device having various passing bands by such an arrangement wherein a ferrite calcined body of high magnetic permeability and that of low permeability are arranged in layers and integrated together and at least one piece of conductor is embedded therein, and the magnetic permeability, thickness, size, relative arrangement, relative dimension, etc. of the calcined body are properly selected. CONSTITUTION:A transmission device is formed by such a method that a magnetic body 1 of high magnetic permeability and another magnetic body 2 of low permeability are arranged in layers and a primary winding conductor 3 starting from PS and terminating at PF and a secondary winding conductor 4 starting from SS and terminating at SF are embedded therein. In this composition, as the magnetic bodies 1 and 2, ferrite calcined bodies are used respectively. Assuming that frequency characteristics of the magnetic bodies 1 and 2 are 100k-10MHz and 1M-100MHz, it is possible to obtain a transmission device of wide band having passing bands of 100kHz-100MHz. By this arrangement, various transmission devices having desired passing or attenuation bands can be obtained. |
