| 摘要 |
<p>A transformer and a BALUN(BALanced to Unbalanced mode converter) are provided to obtain high inductance by increasing the turn number of a coil or forming the coil with upper and lower coils and a plug. A transformer(100) includes a primary coil assembly and a secondary coil assembly. The primary coil assembly includes a plurality of primary coils(10,30) and a first via unit(101,103). The primary coils are formed on a plurality of first insulating layers respectively and are symmetrical to each other. The first via unit connects the adjacent primary coils. The secondary coil assembly includes a plurality of secondary coils(50,70) and a second via unit. The secondary coils are formed on a plurality of second insulating layers respectively and are symmetrical to each other. The second via unit connects the adjacent secondary coil.</p> |
