测向需要使用多个接收变频通道,传统的设计将各个变频链路和本振模块独立封装,相互间采用电缆连接,很难进一步减小架构体积。采用低温共烧陶瓷(LTCC)工艺结合薄膜工艺实现该前端组件,集成了6路Ka频段毫米波变频通道以及本振倍频分路,有...测向需要使用多个接收变频通道,传统的设计将各个变频链路和本振模块独立封装,相互间采用电缆连接,很难进一步减小架构体积。采用低温共烧陶瓷(LTCC)工艺结合薄膜工艺实现该前端组件,集成了6路Ka频段毫米波变频通道以及本振倍频分路,有效地减少整个组件的体积。优化设计后的LTCC层间互联以及穿层互联能够代替同轴互连,在满足传输特性的同时解决了小型化多通道集成带来的电磁兼容问题。最终实现的3次变频6通道接收前端组件,噪声系数小于13.5 d B,增益大于41 d B,整体尺寸为170 mm×170 mm×20 mm。测试结果表明,采用LTCC工艺实现的多通道前端,能够在满足指标的前提下实现小型化。展开更多
The transient Rayleigh wave exploration has high detection accuracy in shallow exploration. The effect of detection array is comprehensive reflection of the velocity of rock and soil mass. Therefore, the roiling multi...The transient Rayleigh wave exploration has high detection accuracy in shallow exploration. The effect of detection array is comprehensive reflection of the velocity of rock and soil mass. Therefore, the roiling multi-channel transient acquisition system has been adopted in this study, which turns one dimensional transient Rayleigh wave exploration into two dimensions, consequently, the two-dimensional velocity distribution of rock and soil mass under the survey line has been achieved. Through comparing with the shallow seismic reflected wave exploration, the result indicates that the rolling multi-channel transient acquisition system has accurate resolution. Thus, in the process of the shallow reflected wave exploration, if the surface wave has developed, the coalition between the reflected wave exploration and the two-dimensional transient Rayleigh wave exploration should actualize the accuracy of exploration.展开更多
文摘测向需要使用多个接收变频通道,传统的设计将各个变频链路和本振模块独立封装,相互间采用电缆连接,很难进一步减小架构体积。采用低温共烧陶瓷(LTCC)工艺结合薄膜工艺实现该前端组件,集成了6路Ka频段毫米波变频通道以及本振倍频分路,有效地减少整个组件的体积。优化设计后的LTCC层间互联以及穿层互联能够代替同轴互连,在满足传输特性的同时解决了小型化多通道集成带来的电磁兼容问题。最终实现的3次变频6通道接收前端组件,噪声系数小于13.5 d B,增益大于41 d B,整体尺寸为170 mm×170 mm×20 mm。测试结果表明,采用LTCC工艺实现的多通道前端,能够在满足指标的前提下实现小型化。
文摘The transient Rayleigh wave exploration has high detection accuracy in shallow exploration. The effect of detection array is comprehensive reflection of the velocity of rock and soil mass. Therefore, the roiling multi-channel transient acquisition system has been adopted in this study, which turns one dimensional transient Rayleigh wave exploration into two dimensions, consequently, the two-dimensional velocity distribution of rock and soil mass under the survey line has been achieved. Through comparing with the shallow seismic reflected wave exploration, the result indicates that the rolling multi-channel transient acquisition system has accurate resolution. Thus, in the process of the shallow reflected wave exploration, if the surface wave has developed, the coalition between the reflected wave exploration and the two-dimensional transient Rayleigh wave exploration should actualize the accuracy of exploration.
