公开(公告)号：US6011446A

公开(公告)日：2000-01-04

申请号：US082805

申请日：1998-05-21

Applicant: Donnie W. Woods

Inventor： Donnie W. Woods

IPC: H01P1/203 ,  H01P7/10 ,  H03B5/18 ,  H03F1/56 ,  H03F3/60

CPC classification number: H01P7/10 ,  H01P1/20309 ,  H03B5/1876 ,  H03F1/56 ,  H03F3/601

Abstract: A frequency-adjustable direct current biasing circuit is disclosed for providing a DC bias voltage or a DC connection to ground for an RF or microwave circuit without substantially affecting the RF or microwave signal of the circuit. The biasing circuit includes a transmission line having a first portion for connection to the RF circuit and a second portion connected to a low-impedance-to-ground structure, such as a bypass capacitor or a DC path to ground. The electrical length between the first and second portions is about 90 degrees. The biasing circuit further includes an open ended tuning stub coupled to the transmission line that has a length that is adjustable. By adjusting the length of the tuning stub, the biasing or grounding circuit can provide better isolation for RF energies at different selected frequencies. Also disclosed herein is a dielectric resonator oscillator (DRO) that uses the frequency-adjustable biasing circuit. Further disclosed is a DRO that includes a FET gate return having an RF-shunted, relatively high resistance coupled to the gate of a field effect transistor by way of a quarterwave transmission line. This improved FET gate return provides for reduced phase noise of the DRO.

Abstract translation: 公开了一种频率可调的直流偏置电路，用于为RF或微波电路提供直流偏置电压或直流连接到地，而基本上不影响电路的RF或微波信号。 偏置电路包括具有用于连接到RF电路的第一部分的传输线和连接到低阻抗对地结构的第二部分，例如旁路电容器或到地的DC路径。 第一和第二部分之间的电气长度约为90度。 偏置电路还包括耦合到传输线的开放式调谐短截线，其具有可调整的长度。 通过调整调谐短截线的长度，偏置或接地电路可以为不同选定频率的射频能量提供更好的隔离。 本文还公开了使用频率可调偏置电路的介质谐振器振荡器（DRO）。 还公开了一种DRO，其包括具有通过四分之一波长传输线耦合到场效应晶体管的栅极的RF分流的较高电阻的FET栅极复位。 这种改进的FET门极返回提供了降低DRO的相位噪声。

公开(公告)号：US06362708B1

公开(公告)日：2002-03-26

申请号：US09352971

申请日：1999-07-14

Applicant: Donnie W. Woods

Inventor： Donnie W. Woods

IPC: H01P710

CPC classification number: H01P1/20309 ,  H01P7/10 ,  H03B5/1876 ,  H03F1/56 ,  H03F3/601

Abstract: A temperature-compensating tuning device is disclosed for tuning and temperature stabilizing the resonant frequency of a dielectric resonator. The tuning device comprises a tuning element in the form of a cylindrical shaft, an inner sleeve coaxially around the tuning element and mating therewith by corresponding sets of threads, and an outer sleeve coaxially around the inner sleeve, and mating therewith by corresponding sets of threads. The outer surface of the outer sleeve may also include threads for mating with threads of a dielectric resonator enclosure. Rotation of the tuning element, inner sleeve and/or outer sleeve can move the tuning element in proximity to a dielectric resonator, which provides the resonant frequency tuning effect. The tuning element, inner and outer sleeves are made of temperature expanding material to cause the tuning element to move in proximity of the dielectric resonator with temperature changes to provide temperature stability to the resonant frequency.

Abstract translation: 公开了用于对介质谐振器的谐振频率进行调谐和温度稳定的温度补偿调谐装置。 调谐装置包括圆柱形轴形式的调谐元件，同轴地围绕调谐元件配合的内套筒，并通过相应的一组螺纹与其相配合，以及外套筒，同轴地围绕内套筒，并且通过相应的一组螺纹 。 外套筒的外表面还可以包括用于与介质谐振器外壳的螺纹配合的螺纹。 调谐元件，内套筒和/或外套筒的旋转可使调谐元件靠近介质谐振器移动，这提供了谐振频率调谐效果。 调谐元件，内部和外部套筒由温度膨胀材料制成，以使调谐元件随着温度变化在介质谐振器附近移动，以提供谐振频率的温度稳定性。

公开(公告)号：US06614329B1

公开(公告)日：2003-09-02

申请号：US10062272

申请日：2002-02-01

Applicant: Donnie W. Woods ,  Charles D. Pitcher

Inventor： Donnie W. Woods ,  Charles D. Pitcher

IPC: H01P1203

CPC classification number: H01P1/2039 ,  H01P1/20381

Abstract: A low-pass filter comprises input and output transmission lines, a high impedance, series transmission line coupling the input and output transmission lines, a first meandered transmission line having one or more pairs of coupled transmission lines and one or more transition transmission lines connecting respective pairs of coupled transmission lines together, wherein one of the coupled transmission lines is connected to the input transmission line, and a second meandered transmission line having one or more pairs of coupled transmission lines and one or more transition transmission lines connecting respective pairs of coupled transmission lines together, wherein one of the coupled transmission lines is connected to the output transmission line. A high-pass filter is similar to the low-pass filter, except it has a pair of series coupled transmission lines in place of the series transmission line. The transmission lines are formed on a dielectric subtrate.

Abstract translation: 低通滤波器包括输入和输出传输线，耦合输入和输出传输线的高阻抗串联传输线，具有一对或多对耦合传输线的第一蜿蜒传输线和连接相应的一条或多条过渡传输线 一对耦合传输线在一起，其中耦合传输线中的一个连接到输入传输线，以及第二曲折传输线，其具有一对或多对耦合的传输线和连接相应耦合传输对的一个或多个过渡传输线 其中耦合传输线中的一个连接到输出传输线。 高通滤波器类似于低通滤波器，除了具有一对串联耦合传输线代替串联传输线。 传输线形成在电介质残留物上。

公开(公告)号：US6124767A

公开(公告)日：2000-09-26

申请号：US352978

申请日：1999-07-14

Applicant: Donnie W. Woods

Inventor： Donnie W. Woods

IPC: H01P1/203 ,  H01P7/10 ,  H03B5/18 ,  H03F1/56 ,  H03F3/60

CPC classification number: H01P1/20309 ,  H01P7/10 ,  H03B5/1876 ,  H03F1/56 ,  H03F3/601

Abstract: An RF/Microwave oscillator is disclosed that has the high-Q, low-loss, and phase noise performance of a DRO, without the need of a dielectric resonator to achieve such performance. The RF/Microwave oscillator includes a field effect transistor having a drain coupled to an output circuit, a source coupled to a series feedback circuit, and a gate coupled to a resonator circuit. Each of these circuits are comprised of cascaded pairs of coupled transmission lines designed to resonate at the operating frequency of the oscillator. The RF/Microwave oscillator may also include a frequency-adjustable bias circuit, a frequency-adjustable FET gate return, and a frequency tuning circuit.

Abstract translation: 公开了一种RF /微波振荡器，其具有DRO的高Q，低损耗和相位噪声性能，而不需要介质谐振器来实现这种性能。 RF /微波振荡器包括场效应晶体管，其具有耦合到输出电路的漏极，耦合到串联反馈电路的源极和耦合到谐振器电路的栅极。 这些电路中的每一个包括被设计为在振荡器的工作频率下共振的耦合传输线的级联对。 RF /微波振荡器还可以包括频率可调偏置电路，频率可调FET门极返回和频率调谐电路。