MILLIMETER-WAVE SOURCES MEASUREMENT AND QUALIFICATION FACILITY

毫米波源测量和鉴定设施

• 批准号: 8363958
• 负责人: CURT R DUNNAM
• 金额: $ 0.05万
• 依托单位: CORNELL UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8363958
• 关键词: Address; Area; Calibration; Characteristics; Devices; Frequencies; Funding; Grant; Maintenance; Measurement; Measures; Modeling; National Center for Research Resources; Noise; Output; Physiologic pulse; Principal Investigator; Regimen; Research; Research Infrastructure; Resources; Services; Source; System; Technology; Testing; United States National Institutes of Health; cost; detector; instrumentation; meter; millimeter; response; tool

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. ACERT presently possesses 5 c.w. and 1 pulsed millimeter-wave sources, ranging in output power from approximately 1mW to 1.2KW. During the course of the Center grant period, we have increasingly required qualification, maintenance, and calibration services for these sources. To this end, we have assembled test and measurement instrumentation necessary to accomplish this task, and have established a regimen for applying these tools to it. The fundamental measurements are power, wavelength/frequency, spectral characteristics (including noise power) and, for pulse devices, temporal response. To address these needs, a test area has been set aside where the necessary measurement setups may be faithfully and quickly reproduced. For our quasioptical power measurements, we rely on a Thomas Keating Ltd. "TK TeraHertz" incident power meter system, with an absolute calibration accuracy of approximately 20% when corrected for wavelength and beam profile. Frequency and spectral characteristics are measured by means of a Tektronix model 492 spectrum analyzer, using a set of calibrated harmonic waveguide detectors covering 20 through 325 GHz. Because the TK power meter is relatively insensitive to wavelength, it produces a calibrated power measurement which is not highly sensitive to nor revealing with respect to the actual operating frequency. The spectrum analyzer, on the other hand, produces a relatively accurate measurement of the operating frequency and good qualitative measurement of the actual output spectrum, but is poorly calibrated with respect to absolute power at a given frequency. Between the two measurement systems, however, a good complementary measurement of power, wavelength/frequency and spectral characteristics is achievable. Temporal response is measured either by direct observation of an appropriate waveguide harmonic mixer output in detector mode, or indirectly, by interpretation of the frequency-domain spectrum observed with the spectrum analyzer.

该副本是利用资源的众多研究子项目之一 由NIH/NCRR资助的中心赠款提供。对该子弹的主要支持 而且，副投影的主要研究员可能是其他来源提供的 包括其他NIH来源。 列出的总费用可能 代表subproject使用的中心基础架构的估计量， NCRR赠款不直接向子弹或副本人员提供的直接资金。 Acert目前拥有5 c.w.和1个脉冲毫米波源，输出功率从约1MW到1.2kW不等。在中心赠款期间，我们越来越多地为这些来源提供资格，维护和校准服务。为此，我们已经组装了完成这项任务所需的测试和测量工具，并建立了将这些工具应用于其的方案。基本测量值是功率，波长/频率，光谱特性（包括噪声功率），对于脉冲设备，时间响应。为了满足这些需求，已经搁置了一个测试区域，可以忠实地迅速复制必要的测量设置。对于我们的准能力测量值，我们依靠Thomas Keating Ltd.“ TK Terahertz”入射力计系统，当校正波长和梁曲线时，绝对校准精度约为20％。使用一组覆盖20至325 GHz的校准的谐波波导检测器，通过Tektronix型492频谱分析仪来衡量频率和光谱特性。由于TK功率计对波长相对不敏感，因此它会产生校准的功率测量值，该测量值对实际工作频率并不高度敏感或揭示。另一方面，频谱分析仪可对实际输出频谱的工作频率和良好的定性测量产生相对准确的测量，但在给定频率下，相对于绝对功率的校准较差。然而，在两个测量系统之间，可以实现良好的互补测量，波长/频率和光谱特性。通过在检测器模式下直接观察适当的波导谐波混合器输出，或通过解释使用Spectrum分析仪观察到的频域频谱来测量时间响应。