公开(公告)号：US3842370A

公开(公告)日：1974-10-15

申请号：US33455173

申请日：1973-02-22

Applicant: HUGHES AIRCRAFT CO

Inventor： FONG T

IPC: H03B1/00 ,  H03B9/14 ,  H03B7/14

CPC classification number: H03B9/145 ,  H03B2009/126 ,  H03B2201/015

Abstract: Disclosed is an improved and highly efficient coaxial TRAPATT oscillator and method for rapidly tuning same. The oscillator includes a TRAPATT diode connected directly between an outer coaxial conductor and a cylindrical quarter wave impedance transformer, and the transformer is in turn coaxially mounted directly between the TRAPATT diode and an inner coxial conductor of the oscillator. An end wall of the cylindrical impedance transformer is closely adjacent to the TRAPATT diode and it forms with the outer conductor a relatively large capacitance necessary for handling the TRAPATT diode displacement currents. Additionally, the geometry of the impedance transformer may be varied to control both this capacitance as well as the transformer impedance, ZT, and the latter in turn determines the optimum delay angle for the oscillator. The impedance transformer provides, among other things, the three functions of: (1) impedance matching the TRAPATT diode to the coaxial oscillator circuitry, (2) providing Saalbach; Herman Karl relatively large gap capacitance, Cg, necessary for handling TRAPATT diode displacement currents, and (3) controlling the optimum delay angle, theta d, of the oscillator. The geometry and location of the step transformer with respect to the TRAPATT diode and the above coaxial conductors greatly improve the tunability of the oscillator.

Abstract translation: 公开了一种改进和高效的同步TRAPATT振荡器及其快速调谐方法。 振荡器包括直接连接在外部同轴导体和圆柱形四分之一波长阻抗变压器之间的TRAPATT二极管，变压器又直接同轴安装在TRAPATT二极管和振荡器的内部辅助导体之间。 圆柱形阻抗变压器的端壁与TRAPATT二极管紧密相邻，并与外部导体形成处理TRAPATT二极管位移电流所需的相对较大的电容。 此外，可以改变阻抗变换器的几何形状以控制该电容以及变压器阻抗ZT，并且后者又确定振荡器的最佳延迟角。 阻抗变压器除其他外，提供以下三个功能：（1）将TRAPATT二极管与同轴振荡器电路进行阻抗匹配，（2）提供Saalbach; Herman Karl相对较大的间隙电容Cg，用于处理TRAPATT二极管位移电流，（3）控制振荡器的最佳延迟角θd。 阶跃式变压器相对于TRAPATT二极管和上述同轴导体的几何形状和位置大大提高了振荡器的可调性。