6-10 GHz单片集成正交混频器的研究
发布时间：2019-04-04 13:03
【摘要】：随着微波电路和半导体工艺的不断发展,小型化和高度集成化已经成为了现代通信系统的发展趋势。单片微波集成电路由于具有小体积、量产成本低及高稳定性等特点而成为了研究热点,在军用领域和民用领域的应用越来越广泛。混频器作为MMIC研究中主要的部件,具有重要的研究意义。有效的抑制镜像信号一直是单边带无线电系统的一个研究重点,作为镜像抑制混频器的一种,正交混频器能十分有效的抑制镜像信号,其性能好坏对通信系统的影响非常大。利用集总正交耦合器代替传统的Lange电桥,使得芯片的面积大大减小。通过对集总正交耦合器工作原理的分析,采用奇偶模激励法深入的分析了其单级结构,在此基础之上进行级联,得到了适用的两级结构,基于此设计出的正交耦合器具有良好的幅度和相位平衡度,使得正交混频器的镜像抑制能力得到了大幅度提升。混频单元采用双平衡结构,提高了电路的隔离度以及增加了带宽。在巴伦的设计中,采用螺旋巴伦代替传统的Marchand巴伦。针对双平衡混频器难以实现输入端口宽带匹配的缺点,在巴伦的两个初级线圈增加一个并联电容及一个串联到地的电容,构成了一个T型网络。采用该种结构的巴伦能够代替LC匹配电路,并且实现宽带匹配。采用WIN 0.15mm Ga As p HEMT工艺设计了一款6-10 GHz正交混频器芯片,芯片面积为1.5×1.15mm~2。测试结果表明,在6-10 GHz宽频带内混频器的变频损耗典型值为7 dB,镜像抑制度典型值为30 dB,本振端口到射频端口的隔离度典型值为36 dB,本振端口到中频端口的隔离度典型值为20 dB,射频端口到中频端口的隔离度典型值为38 dB,中频带宽为DC-3.5 GHz,P1dB大于13dBm。
[Abstract]:With the development of microwave circuit and semiconductor technology, miniaturization and high integration have become the development trend of modern communication system. Because of its small size, low cost of mass production and high stability, monolithic microwave integrated circuit (monolithic microwave integrated circuit) has become a research hotspot, and has been widely used in military and civil fields. As the main component of MMIC research, mixer has important research significance. The effective suppression of mirror signal is always a research focus of SSB radio system. As a kind of mirror image suppression mixer, the orthogonal mixer can suppress the mirror signal very effectively. The performance of the quadrature mixer has a great influence on the communication system. Using lumped orthogonal couplers to replace the traditional Lange bridge, the area of the chip is greatly reduced. Based on the analysis of the working principle of lumped orthogonal couplers, the single-stage structure is deeply analyzed by using the odd-even mode excitation method. On this basis, the suitable two-stage structure is obtained by cascading on the basis of the analysis of the working principle of the lumped orthogonal couplers. Based on this design, the orthogonal coupler has good amplitude and phase balance, which greatly improves the image rejection ability of the quadrature mixer. The mixing unit adopts a double balanced structure, which improves the isolation and bandwidth of the circuit. In Baron's design, spiral Baron is used to replace the traditional Marchand Baron. In view of the disadvantage that the double balanced mixer is difficult to realize the broadband matching of input ports, a T-type network is formed by adding a parallel capacitor and a series-to-ground capacitance to two primary coils in Baron. Barron with this structure can replace LC matching circuit and realize wide band matching. A 6 脳 10 GHz quadrature mixer chip with a chip area of 1.5 脳 1.15mm 路m ~ 2 was designed by WIN 0.15mm Ga As p HEMT process. The test results show that the typical value of the frequency conversion loss in the 6-10 GHz broadband mixer is 7 dB, mirror suppression system. The typical isolation value from 30 dB, local oscillator port to radio frequency port is 36 dB,. The isolation from the local port to the intermediate frequency port is typical of 20 dB, RF port to intermediate frequency port. The typical isolation value is 38 dB, if bandwidth is greater than 13 dBm.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN773
本文编号：2453842
[Abstract]:With the development of microwave circuit and semiconductor technology, miniaturization and high integration have become the development trend of modern communication system. Because of its small size, low cost of mass production and high stability, monolithic microwave integrated circuit (monolithic microwave integrated circuit) has become a research hotspot, and has been widely used in military and civil fields. As the main component of MMIC research, mixer has important research significance. The effective suppression of mirror signal is always a research focus of SSB radio system. As a kind of mirror image suppression mixer, the orthogonal mixer can suppress the mirror signal very effectively. The performance of the quadrature mixer has a great influence on the communication system. Using lumped orthogonal couplers to replace the traditional Lange bridge, the area of the chip is greatly reduced. Based on the analysis of the working principle of lumped orthogonal couplers, the single-stage structure is deeply analyzed by using the odd-even mode excitation method. On this basis, the suitable two-stage structure is obtained by cascading on the basis of the analysis of the working principle of the lumped orthogonal couplers. Based on this design, the orthogonal coupler has good amplitude and phase balance, which greatly improves the image rejection ability of the quadrature mixer. The mixing unit adopts a double balanced structure, which improves the isolation and bandwidth of the circuit. In Baron's design, spiral Baron is used to replace the traditional Marchand Baron. In view of the disadvantage that the double balanced mixer is difficult to realize the broadband matching of input ports, a T-type network is formed by adding a parallel capacitor and a series-to-ground capacitance to two primary coils in Baron. Barron with this structure can replace LC matching circuit and realize wide band matching. A 6 脳 10 GHz quadrature mixer chip with a chip area of 1.5 脳 1.15mm 路m ~ 2 was designed by WIN 0.15mm Ga As p HEMT process. The test results show that the typical value of the frequency conversion loss in the 6-10 GHz broadband mixer is 7 dB, mirror suppression system. The typical isolation value from 30 dB, local oscillator port to radio frequency port is 36 dB,. The isolation from the local port to the intermediate frequency port is typical of 20 dB, RF port to intermediate frequency port. The typical isolation value is 38 dB, if bandwidth is greater than 13 dBm.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN773
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