Design of a RF Switch Used in Redundant Atomic Clock Configurations

Sensors

Sheng Tang¹  Tao Zhang¹  Yuqing Hou¹  Sangyuan Wang¹ 

[1] School of Information Science and Technology, Northwest University, Xi‘an 710127, China;

关键词: atomic clock;    redundant configuration;    RF switch;    switching speed;   

DOI  :  10.3390/s19102331

来源: DOAJ

【 摘 要 】

Atomic clocks provide frequency reference signals for communication, aerospace, satellite navigation and other systems. The redundant configuration of atomic clocks is necessary for ensuring the continuity and stability of the system. A radio frequency (RF) switch is usually used as a switching device in the switching system of the host atomic clock and the backup atomic clock. When the atomic clock fails, the switching between the host and the backup clock can be carried out quickly. Aiming at the fast switching requirements of atomic clock RF signals, this paper proposes a new series-shunt Positive Intrinsic Negative (PIN) switch design. In this paper, the evaluation of the RF switches is conducted by using the metrics of switching speed, insertion loss, isolation, return loss at on state and return loss at off state. Experimental result shows that the new PIN switch has better and more comprehensive performance metrics than the electromechanical switch, FET switch and conventional PIN switch. In particular, the switching speed is 53 ns faster than the conventional series-shunt PIN switch.

【 授权许可】

Unknown