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- The minimum requied number of controlled elements in a square array with electronic beam scanning over specified sector for a guaranteed upper limit on beamwidth without grating lobes is determined. 确定了没有栅状波瓣时在一定波束宽度限制的条件下对特定区间进行电扫描的矩形阵列所需的最少可控制单元的数目。
- without grating lobes 无栅瓣
- This paper analyses the pattern function of DBF in subarray. The designing method for directivity pattern is given and the condition of producing the grating lobe is discussed. 详细分析了由子阵构成的DBF的方向性函数特性 ,给出了方向图的设计方法 ,并讨论了其栅瓣产生的条件。
- This paper analyses the pattern function of DBF in subarray.The designing method for directivity pattern is given and the condition of producing the grating lobe is discussed. 详细分析了由子阵构成的DBF的方向性函数特性,给出了方向图的设计方法,并讨论了其栅瓣产生的条件。
- The closed-form expressions for the efficiency index, grating lobe level, beamwidth and clean region width are also given.As a result, a simple design method of optimum thinning arrays with... 若所有阵元均无方向性且等加权,则具有平坦栅瓣包络的阵列应是指数间隔排列的阔。
- Avoiding the bondage of bitterness,the deceit of wealth without character,and the vanity of pride without gratefulness. 切勿被苦难所束缚,切勿被毫无来由的财富所蒙蔽,切勿目空一切。
- Avoiding the bondage of bitterness, the deceit of wealth without character, and the vanity of pride without gratefulness. 避免怨恨的束缚,没有个性的财富的欺骗,没有感恩之心的骄傲的虚荣。
- It is hard to sleep without a cooler in this room. 没有空气调节器,在这间屋里很难入睡。
- Knowledge without common sense counts for little. 光有学问而无常识,则这种学问无甚价值。
- He acted wrongly and without scruple. 他做了错事毫不内疚。
- It is rash to cross the street without looking both ways. 不朝两边看看就穿马路是莽撞的。
- The Grating Lobe hnduced by the Coupling of Range and Direction in SIAR and its Elimination 综合脉冲与孔径雷达的距离与方向耦合栅瓣现象及其克服方法
- It is fun eating by stealth without being found. 偷吃而不被人发现很有趣。
- I just want an ordinary car without the frills. 我只要一辆没有多余装饰的普通汽车。
- You cannot enter a military base without a permit. 无通行证者不得擅入军事基地。
- We can't go any farther without a rest. 不休息我们就走不动了。
- He can now ride his bike without stabilizers. 他现在骑自行车不需要平衡器了。
- He sloped off without being seen. 他人不知鬼不觉地溜走了。
- A car is useless without petrol. 汽车没有汽油就不能使用。
- He did it without compromise of his dignity. 他做这事而不损及他的尊严。