UC知道通信方面的翻译问题
来源：百度知道 编辑：UC知道 时间：2024/09/20 21:43:31
Quadrature hybrid is widely used in RF/microwave circuits, such
as balanced amplifiers and array antenna feeding networks. Sinceits structure is symmetrical, a quadrature hybrid can be analyzed
using even-mode and odd-mode technique . Conventional quadrature hybrids are composed of two pairs of quarter-wavelength transmission lines. At low frequencies, the size of conventional hybrids is too big for practical use. Some literatures have
been reported on how to miniaturize the size of quadrature hybrid.
The quarter-wavelength lines of the conventional one can be
shortened by increasing the characteristic impedance and introducing
lumped capacitance at the end of the lines . On the other
hand, improved hybrid with eight two-step stubs is also miniaturized
. Furthermore, a quadrature hybrid with artificial transmission
lines can even achieve a better performance .Because of transmission line distributed characteristics, microstrip
branch-li
as balanced amplifiers and array antenna feeding networks. Sinceits structure is symmetrical, a quadrature hybrid can be analyzed
using even-mode and odd-mode technique . Conventional quadrature hybrids are composed of two pairs of quarter-wavelength transmission lines. At low frequencies, the size of conventional hybrids is too big for practical use. Some literatures have
been reported on how to miniaturize the size of quadrature hybrid.
The quarter-wavelength lines of the conventional one can be
shortened by increasing the characteristic impedance and introducing
lumped capacitance at the end of the lines . On the other
hand, improved hybrid with eight two-step stubs is also miniaturized
. Furthermore, a quadrature hybrid with artificial transmission
lines can even achieve a better performance .Because of transmission line distributed characteristics, microstrip
branch-li
正交混合广泛用于射频/微波电路，例如
平衡放大器和阵列天线喂养网络。 Sinceits结构是对称的，一个正交混合可以分析
即使使用模式和单模式技术。常规正交混合组成二双四分之一波长传输线。低频的规模常规杂交太大的实际用途。有些文献有
报告就如何缩小规模的正交混合。
四分之一波长线的传统可
缩短通过增加特性阻抗和引进
集总电容结束时的线路。关于其他
另一方面，改进的混合与八个两步存根也是微型
。此外，一个正交混合人工传输
线甚至可以实现更好的性能。由于输电线路分布的特点，微带
科系杂交患有谐波问题。为了消除
谐波信号的正交混合，可使用
额外的低通滤波器抑制谐波信号。然而，这将增加通插入损耗，成本和电路复杂性。在这封信中，两个正交谐波抑制杂交介绍。单杂交实现第三谐波抑制，将二双季度波长分行常规混合二对相当于T形微带线，和另外一个获得第三和第五谐波抑制，将在四分之一波长分支机构具有同等十字型微带线。
参考答案:同是天涯沦落人，相逢何必曾相识。