会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明授权
    • Transistor oscillator/frequency doubler with optimized harmonic feedback
    • 晶体管振荡器/倍频器,具有优化的谐波反馈
    • US4518931A
    • 1985-05-21
    • US491841
    • 1983-05-05
    • Christen Rauscher
    • Christen Rauscher
    • H03B5/18H03B1/04
    • H03B5/1852
    • A microwave transistor oscillator/doubler comprising a Field-Effect Transistor with Terminals G, D and S in combination with a coupling network connected to the terminals G, D and S and composed of microstrip lines with lengths equal to a quarter wavelength at the second harmonic of a fundamental frequency. The doubler further comprises a bias circuit for supplying appropriate voltages to the FET terminals, and an impedance coupler for coupling from the FET D-S terminals to a waveguide load. The coupling network optimizes feedback at the second harmonic between the D-S and G-S ports of the FET to prevent destructive harmonic feedback interaction with the desired signal while providing optimum conditions for feedback at the fundamental frequency. The bias circuit is connected to the coupling network and includes a second network of transmission line elements of lengths equal to a quarter wavelength at the fundamental in order to prevent dissipation of the fundamental frequency therein.
    • 一种微波晶体管振荡器/倍增器,包括具有端子G,D和S的场效应晶体管,与连接到端子G,D和S的耦合网络组合,并由长度等于二次谐波四分之一波长的微带线组成 的基本频率。 倍增器还包括用于向FET端子提供适当电压的偏置电路和用于从FET D-S端子耦合到波导负载的阻抗耦合器。 耦合网络优化FET的D-S和G-S端口之间的二次谐波处的反馈,以防止与期望信号的破坏性谐波反馈相互作用,同时为基频的反馈提供最佳条件。 偏置电路连接到耦合网络,并且包括长度等于基波的四分之一波长的传输线元件的第二网络,以便防止其中基频的耗散。
    • 10. 发明授权
    • Portable fluoroscope
    • 便携式荧光镜
    • US3925675A
    • 1975-12-09
    • US50400074
    • 1974-09-06
    • US ARMY
    • GULBIS IMANTSJORDAN RODNEY W
    • G01V5/00G01N21/52
    • G01V5/0008
    • A portable fluoroscope utilizes a hingedly mounted, light shielded, fluorescent screen positioned in front of a lookthrough radiation shield. A leaded glass eyepiece positioned within the radiation shield is used as a radiation resistant viewing port to observe the image produced on the fluorescent screen by an irradiated object. The use of a relatively small piece of lead-glass in the viewing port of the present device in comparison to the use of a lead-glass plate the size of the fluorrescent screen, which is immediately adjacent thereto in the prior art, has resulted in a substantial reduction in weight and cost for the same degree of radiation protection.
    • 便携式荧光镜使用位于透视辐射屏蔽前方的铰接式屏蔽荧光屏。 使用位于辐射屏蔽内的含铅玻璃目镜作为防辐射观察口,以观察被照射物体在荧光屏上产生的图像。 与现有技术中与其紧邻的荧光屏的尺寸相比,使用铅玻璃板相比,在本装置的观察口中使用相对较小的铅玻璃,已经导致 相当程度的辐射防护的重量和成本的显着降低。