Power-combining based on master-slave injection-locking magnetron

A microwave power-combining system composed of two Panasonic 2M244-M1 magnetrons based on master–slave injection-locking is demonstrated in this paper. The principle of master–slave injection-locking and the locking condition are theoretical analyzed. Experimental results are consistent with the theoretical analysis and the experimental combined efficiency is higher than 96%. Compared with the external-injection-locked system, the power-combining based on the master–slave injection-locking magnetron is superior by taking out the external solid-state driver and the real-time phase control system. Thus, this power-combining system has great potential for obtaining a high efficiency, high stability, low cost, and high power microwave source.

甘蔗宿根性与抗寒性初探

用4×3不完全双列杂交的甘蔗实生苗，以严冬后的宿极成活率代表抗寒性，它根发苗数代表宿根性．讨论了甘蔗实生苗的宿极性与抗寒性，结果表明：1甘蔗的抗寒性与其它农艺性状几乎不存在相关，而宿根性则与有效茎存在显著的正相关。2抗寒性、宿根性之间存在极显著的正相关，但两者间仍然有区别；宿根性的好坏取决于所含割手密的血缘比重．3抗寒性与宿极性在遗传上有着明显的差异，通过亲本选择与组合的选配来提高甘蔗品种的抗寒性、宿根性是可行的。