The network for stable radio frequency dissemination is evolving from point-to-point to point-to-multipoint. For a long-distance dissemination network with multiple access sites, the amplifier is one of the most important components which is used to compensate for power loss caused by optical fibers and optical couplers when the RF reference propagates through dissemination networks. However, the amplifier also introduces amplified spontaneous emission (ASE) noise which will degrade the stability of RF reference, and can not be eliminated by any compensation methods. Hence, this paper aims to find proper amplifiers to minimize total phase jitters corresponding to the stability of RF reference signal for long-distance ring dissemination network with multiple access sites. First, a non-linear noise model of ring dissemination network constrained by several non-linear and linear factors is formulated. Then three optimal amplifier placement and maximum gain adjustment strategies are proposed, i.e., as maximum as possible placement (AMAP), as compatible as possible placement (ACAP), and as average as possible placement (AAAP). Finally, numerical results conducted in various long-distance ring dissemination networks demonstrate that AAAP outperforms AMAP and ACAP for different download sites. The phase jitters of AAAP can decrease approximately 14% than ACAP. Besides, the performance of AAAP still better than AMAP and ACAP for different long-distance dissemination networks and remote sites. Moreover, the performance of three optimal placement strategies is not sensitive to the max achievable gain of amplifiers. More importantly, the AAAP consumes fewer amplifiers than AMAP and ACAP, and the difference in the number of amplifiers will increase with the number of sites located in long-distance ring dissemination networks. These results can provide significant guidance to stable RF dissemination network planning in the future.

用于稳定射频传播的网络正在从点对点演变为点对多点。对于具有多个接入点的长距离传播网络，放大器是最重要的组件之一，用于补偿射频参考在传播网络中传播时光纤和光耦合器造成的功率损耗。但是，放大器也会引入放大的自发辐射 (ASE) 噪声，这会降低射频参考的稳定性，并且无法通过任何补偿方法消除。因此，本文旨在寻找合适的放大器来最小化与具有多个接入站点的长距离环形传播网络的 RF 参考信号的稳定性相对应的总相位抖动。第一的，建立了受多个非线性和线性因素约束的环形传播网络非线性噪声模型。然后提出了三种最佳放大器布局和最大增益调整策略，即尽可能最大布局（AMAP）、尽可能兼容布局（ACAP）和尽可能平均布局（AAAP）。最后，在各种长距离环形传播网络中进行的数值结果表明，对于不同的下载站点，AAAP 优于 AMAP 和 ACAP。AAAP 的相位抖动比 ACAP 降低约 14%。此外，对于不同的远程传播网络和远程站点，AAAP 的性能仍然优于 AMAP 和 ACAP。此外，三种最佳布局策略的性能对放大器的最大可实现增益不敏感。更重要的是，AAAP比AMAP和ACAP消耗的放大器更少，并且放大器数量的差异会随着位于长距离环形传播网络中的站点数量而增加。这些结果可以为未来稳定的射频传播网络规划提供重要指导。