LTCC基P波段90°功分器的制作

Preparation of LTCC P-band 90° Power Divider

文章以LTCC基P波段90°功分器的设计和制作为例,从无源设计仿真和LTCC工艺阐述了P波段功分器的研制过程。选用了承受功率大、尺寸相对较小的宽边耦合器结构。设计的宽边耦合器采用多层结构,有利于发挥LTCC基板多层、高集成度等优点。其电路物理模型为Broadside-coupled symmetric stripline (BCL),采用的介质为LTCC,介电常数为5.9,每层介质厚度为0.1mm,导体采用Ag浆。在实物制作过程中,TOP层和Bottom层是采用灌银通孔实现的。最终测试结果与仿真结果吻合较好,在225MHz～400MHz频段内隔离23dB,插损0.5dB,驻波1.1,相平衡度±2.5,功率250W。

This article take designs and the manufacture of LTCC P-band 90° power divider as an example, the manufacture of P- band power divider is elaborated from the passive design simulation and the LTCC technology. The broadside coupler structure was chosen which have bear great power and the small relatively size. Broadside design coupled with a multi-layer structure is conducive to play LTCC substrates multi-level, a high level of integration advantages. Its physical model for the circuit is broadside-coupled symmetric stripline, Media used for LTCC, the dielectric constant of 5.9, the library media thickness of 0. 1 mm, using Ag conductor paste. In the physical production process, top and bottom layer is a silver-hole achieved. Final test results agree well with the simulation results, the 23 dB is isolated in the 225 MHz-400MHz band, isolationnsertion loss of 0.5 dB, VSWR 1.1, the equilibrium e 2.5 and power 250 W.