【摘要】 本文讨论了在捷变频雷达中由于系统的鉴频效应将本振的FM噪声转换为接收机AM噪声的原理;重点分析并推导了在具有快速自频调子系统的雷达中移相鉴频的形成过程及其对整机噪声的影响;提出了降低本振附加的FM噪声,减小系统的鉴频效应,使整机的附加噪声得以有效抑制的改进措施。这些措施已在雷达的实际应用中得到成功的验证。更多还原

【Abstract】 The principle of converting FM noise of the local oscillator into AM noise of the receiver due to the discrimination effect in agile radar is discussed. The phase-shifting discrimination and its effect on the receiver noise in the radar with a fast AFC subsystem are analysed and formulated. The methods to minimize the extra FM noise of LO and the discrimination effect are proposed so that the additional receiver noise can be effectively repressed. The practical results applied to several radars have proved these methods to be successful.更多还原