Evaluation at the Remote Site for Ultra-stable Radio Frequency Dissemination via Fiber Links

TL;DR

The paper presents a remote-site evaluation method for ultra-stable RF dissemination via fiber links, enabling direct assessment of transfer quality without local site measurement, suitable for antenna array systems.

Contribution

A novel remote-site evaluation technique for RF transfer quality via fiber links, matching traditional local-site methods, facilitating practical deployment in antenna systems.

Findings

Remote-site evaluation matches local-site results

Method effectively assesses RF transfer stability

Applicable to antenna array system deployments

Abstract

We demonstrate a method which can directly evaluate the radio frequency transfer quality via fiber links at the remote site. Coherent signals are first transferred to the same remote site via two stabilized fiber links. The two signals at the remote site are compared with each other. The relative phase difference can represent transfer stability loss. This evaluation method at the remote site has been compared with the traditional one with which the signal is evaluated at the local site. The two results match perfectly. It indicates that the method is available to evaluate the transfer performance of radio frequency (RF) dissemination in such applications as antenna array systems.