Phase calibration and water vapor radiometry for millimeter-wave arrays

نویسندگان

چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A Three-Frequency Feed for Millimeter-Wave Radiometry

multiband modeling of quantum electron transport through layered semiconductor devices, catalyst activity of water-assisted growth of single walled carbon nanotube forest characterization by a statistical and macroscopic approach, ABSTRACT: A high-performance millimeter-wave feed, designed for a broad-band radiometry application is presented. The feed provides three separate output ports in the...

متن کامل

Planar Waveguide Arrays for Millimeter Wave Systems

Design of high gain and high efficiency antennas is one of the key challenges in antenna engineering and especially in millimeter wave communication systems. Various types of planar waveguide arrays with series-fed traveling wave operation have been developed in Tokyo Tech with the special focus upon efficiency enhancement as well as reduction of fabrication cost. In this review, four kinds of ...

متن کامل

Aircraft millimeter-wave passive sensing of cloud liquid water and water vapor during VOCALS-REx

Routine liquid water path measurements and water vapor path are valuable for process studies of the cloudy marine boundary layer and for the assessment of large-scale models. The VOCALS Regional Experiment respected this goal by including a small, inexpensive, upwardpointing millimeter-wavelength passive radiometer on the fourteen research flights of the NCAR C-130 plane, the Gband (183 GHz) Va...

متن کامل

Atmospheric Water Vapor Measurements: Comparison of Microwave Radiometry and Lidar

The NASAJGSFC Crustal Dynamics Project microwave water vapor radiometer 003) is evaluated in terms of measurements of the integrated precipitable water vapor content of a particular column of the troposphere. The measurements were taken during the Atmospheric Moisture Intercomparison Study (ATMIS) held at Wallops Island, Virginia, during April 1989. Various water vapor sensing instruments were ...

متن کامل

Sideband Calibration of Millimeter-Wave Receivers

Accurate calibration of a millimeter-wave heterodyne receiver requires a knowledge of the ratio of gains at the upper and lower sideband frequencies — i.e., the sideband ratio. For an ideal double-sideband receiver, the sideband ratio is unity, but in practice it can be several dB, particularly when a high IF is used [1]. In the case of sideband-separating receivers, the sideband ratio is the i...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Astronomy and Astrophysics Supplement Series

سال: 1997

ISSN: 0365-0138,1286-4846

DOI: 10.1051/aas:1997155