Broadband, low-loss and high-balance-degree on-chip Balun
A low-loss, balanced technology, applied in the RF field, can solve the problems of limited performance of mixers and differential amplifiers, and the overall circuit performance is difficult to meet system requirements, achieving superior in-band amplitude, low loss, and wide operating frequency range. Effect
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[0016] see figure 1 , 2 , set four regular octagonal planar spiral coils similar to disc-shaped mosquito coils, two of which are balanced coils 1 and 2, and the other two are unbalanced coils 3 and 4, and each regular octagonal planar spiral coil has an inner port and an external port, set the paper surface as the reference plane, set the vertical axis of symmetry in the up and down direction of the reference plane, set the horizontal axis of symmetry in the left and right directions of the reference plane, and place the two balance coils on the uppermost plane parallel to the reference plane , the two balanced coils are symmetrically arranged at intervals on both sides of the horizontal symmetry axis, and two unbalanced coils 3 and 4 on the same plane as the reference plane are respectively arranged directly below the two balanced coils 1 and 2, and the two balanced coils 1, 2 The gaps between 2 and the two unbalanced coils 3 and 4 are respectively filled with insulating med...
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