| 摘要 |
PURPOSE:To attain ease of wiring work and to decrease the variance in performance by using a drum type core having winding slots and terminal pins. CONSTITUTION:The drum type core D1 has winding slots W1, W2 and a terminal 2 is implanted to the guard. Windings N11, N12 are wound on the winding slot W1 and windings N21, N22 are wound on a winding slot W2 respectively. Since the drum type core is in use in this way, the coil wiring is attained easily and the variance in the coupling and characteristic impedance of the balun coil is decreased.
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