MI-WAVE模式圆波导340系列340-495
型号：340-495
频率：48-96.0GHz
插入损耗 TE01MAX：0.3
插入损耗 TE11MIN:10.0
VSWR：1.20
340-495
Dimensional

in:6.85
mm:173.99

描述：Mi-Waves’ 340 series a critical consideration when using TE01 mode circular waveguide is the preservation of mode purity. Due to the similarities between the TE01 and TM11 modes, even the slightest irregularities in the circular waveguide will cause mode conversion from TE01 to TM11. And the large waveguide diameters will readily propagate TEM1 modes which degrade the purity of the TE01 signal. Extraneous TEM1 and TEMN modes cannot be reconverted to the TE10 rectangular mode – they show up as large spurious losses.

Each 340 series mode filter consists of a section of lossy wall waveguide. Because the higher order modes (TMM1, TEMN) have wall currents, they are sharply attenuated and do not propagate. Although the energy transferred to these modes is minimal, mode filters must be placed periodically along the transmission line. The TE01 mode, which does not have wall currents, passes through this section unaffected. The 340 series mode filters are available in circular waveguide sizes from 12.4 to 140 GHz. They are fitted with one male and one female type of Mi-Waves’ standard circular flanges.
Mi Waves\340 系列时使用 TE01 模式圆波导的一个关键因素是维护模式纯度。由于在 TE01 和 TM11 模式之间的相似性，甚至丝毫方面在圆波导中的违规行为将导致从 TE01 到 TM11 的模式转换。大波导直径将容易传播 TEM1 模式从而降低 TE01 信号的纯度。外来 TEM1 和 TEMN 模式不能转换为它们显示为大杂散 l 340 系列模式筛选器包含部分，有损墙波导 TE10 矩形模式 \u2013。因为较高的订单模式 \x28TMM1，TEMN\x29 有墙电流，他们大幅衰减，将不会传播。尽管转移到这些模式的能量很小，模式筛选器必须定期放沿输电线路。TE01 模式中，并没有墙电流，通过这一节不受影响。340 系列模式筛选器，可在圆波导尺寸从 12.4 到 140 GHz。他们配备一公和一母类型的 Mi Waves 标准的圆形法兰。