应用一种新型的互补传输线Complementary-Conducting-Strip Transmission Line(CCS TL)实现了简单结构的平面无耦合巴伦(balun),在保证性能的前提下极大地缩小了电路尺寸,便于紧凑化集成。整个电路在0.127mm厚度的Arlon 880基片上实现,平面面积为8mm×6mm,约占传统微带线实现相同电路面积的五分之一。电路的中心频率为7.5GHz,带宽为40%(6GHz-9GHz),带内各端口回波损耗在-10dB以下,平衡端口隔离度在-15dB以下,平衡端口输出幅度不平衡度在±0.5dB以内,实测结果符合理论预期。 Complement-Conducting-Strip Transmission Line (CCS TL), a new type of complementary transmission line, enables the simple structure of the planar balun, which greatly reduces the size of the circuit for compactness and integration. The entire circuit is realized on an Arlon 880 substrate of 0.127 mm thickness with a planar area of ​​8 mm x 6 mm, accounting for about one-fifth of the same circuit area of ​​a conventional microstrip line. The center frequency of the circuit is 7.5GHz and the bandwidth is 40% (6GHz-9GHz). The return loss of each port in the band is below -10dB, the isolation of the balanced port is below -15dB, the imbalance degree of the balanced port output amplitude is within ± 0.5dB Within the measured results in line with theoretical expectations.