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本帖最后由 沼泽 于 2012-7-21 13:10 编辑
yxwd5 发表于 2012-7-21 12:25 
想说明一点,多腔高能磁控管貌似是1939年才由英国伯明翰大学的蓝德尔和布特发明的。和德国人有啥关系? ...
请注意高能这个字眼,是在德国开发多腔磁控管上提高了功率而来的产物。至于那个提高功率的障碍热量问题,解决方式出奇简单,如内存超频加马甲一样。用过电子管的人都知道,那玩意功率高但销量并没晶体管高,大量能量被转化成了元件热量。电子管高功率是容易坏。
While radar was being developed during World War II, there arose an urgent need for a high-power microwave generator that worked at shorter wavelengths (around 10 cm (3 GHz)) rather than the 150 cm (200 MHz) that was available from tube-based generators of the time. It was known that a multi-cavity resonant magnetron had been developed and patented in 1935 by Hans Hollmann in Berlin,[15] and independently, in 1935, by physicist Theodor V. Ionescu in Romania. However, the German military considered the frequency drift of Hollman's device to be undesirable, and based their radar systems on the klystron instead. But klystrons could not at that time achieve the high power output that magnetrons eventually reached. This was one reason that German night fighter radars were not a match for their British counterparts.[16]
In 1940, at the University of Birmingham in the United Kingdom, John Randall and Harry Boot produced a working prototype similar to Hollman's cavity magnetron, but added liquid cooling and a stronger cavity. |
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