论文部分内容阅读
1980年Carpenter和Ghosh分别提出双槽深波纹喇叭。其波纹壁由两种不同深度的槽交替组合而成。两个不同深度的槽分别谐报于两个频段,因而在两个频段能同时获得平衡混合条件(即混合比γ=1),从而可在两个以上的频段内获得理想的波瓣等化和交叉极化极小的辐射场特性。因此这种新型喇叭立即受到人们的重视。Carpenter和Ghosh给出了这种喇叭的实测值,但并未能给出它们的理论分析公式。Ghosh用对两个不同深度的槽内场取平均值的方法计算这种双槽深组合波纹壁的等效阻抗。他给出的计算公式没有正确表达相邻两槽的场的正确关系,只能适用于两个槽深接近相等的情况,而不能适用于一般情
In 1980, Carpenter and Ghosh put forward a double groove deep corrugated horn. Its corrugated walls are alternately formed by two grooves of different depths. Two troughs of different depths are reported in two frequency bands, respectively, so that balanced mixing conditions (ie, mixing ratio γ = 1) can be simultaneously obtained in both frequency bands so that ideal lobe equalization can be obtained in more than two frequency bands And minimal cross-polarization radiation field characteristics. Therefore, this new speaker immediately by people’s attention. Carpenter and Ghosh gave the measured values for this horn, but did not give their theoretical formula. Ghosh calculated the equivalent impedance of this double-groove, deep, combined corrugated wall by averaging the field inside the tank at two different depths. The formula given by him does not correctly represent the correct relationship between the fields of adjacent two troughs and can only be applied to the case where two trough depths are close to the same but not to the general situation