Abstract
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.
Highlights
An atomic clock is an oscillator and an auxiliary circuit which can produce high accuracy and stability standard frequency signals such as a 10 MHz sine signal [1]
In order to meet the requirements of the smooth switching of the radio frequency (RF) signal by atomic clocks, Sensors 2019, 19, 2331 this paper analyzes the technical performance metrics of different RF switches
By comparing their switching speed, insertion loss, isolation, return loss and other technical performance metrics, this paper proposes new Positive Intrinsic Negative (PIN)
Summary
An atomic clock is an oscillator and an auxiliary circuit which can produce high accuracy and stability standard frequency signals such as a 10 MHz sine signal [1]. In order to meet the requirements of the smooth switching of the RF signal by atomic clocks, Sensors 2019, 19, 2331 this paper analyzes the technical performance metrics of different RF switches. By comparing their switching speed, insertion loss, isolation, return loss and other technical performance metrics, this paper proposes new PIN switch as thephase switch device for the switching systemare of one hand, so as toa ensure the series-shunt frequency difference and difference between the two signals atomic redundant configurations. Comparison of Different RF Switches this paper analyzes the technical performance metrics of different RF switches By comparing their switching speed, the insertion loss, isolation, return loss and other technical performance metrics, this. The final part summarizes the main work and contributions of this paper
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