scholarly journals The Influence of Elevation Angle on 60 GHz Near-Body Path Gain

2018 ◽  
Author(s):  
Lei Zhang ◽  
A. McKernan ◽  
S.L. Cotton ◽  
W.G. Scanlon
Keyword(s):  
Elevation Angle ◽  
60 Ghz ◽  
Path Gain

scholarly journals Long-Term Observations of Microwave Brightness Temperatures over a Metropolitan Area: Comparison of Radiometric Data and Spectra Simulated with the Use of Radiosonde Measurements

2021 ◽  
Vol 13 (11) ◽  
pp. 2061
Author(s):  
Mikhail V. Belikovich ◽  
Mikhail Yu. Kulikov ◽  
Dmitry S. Makarov ◽  
Natalya K. Skalyga ◽  
Vitaly G. Ryskin ◽  
...  
Keyword(s):  
Radiative Transfer ◽  
Elevation Angle ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Systematic Bias ◽  
Tropospheric Temperature ◽  
Absorption Model ◽  
60 Ghz ◽  
Error Budget ◽  
The Difference

Ground-based microwave radiometers are increasingly used in operational meteorology and nowcasting. These instruments continuously measure the spectra of downwelling atmospheric radiation in the range 20–60 GHz used for the retrieval of tropospheric temperature and water vapor profiles. Spectroscopic uncertainty is an important part of the retrieval error budget, as it leads to systematic bias. In this study, we analyze the difference between observed and simulated microwave spectra obtained from more than four years of microwave and radiosonde observations over Nizhny Novgorod (56.2° N, 44° E). We focus on zenith-measured and elevation-scanning data in clear-sky conditions. The simulated spectra are calculated by a radiative transfer model with the use of radiosonde profiles and different absorption models, corresponding to the latest spectroscopy research. In the case of zenith-measurements, we found a systematic bias (up to ~2 K) of simulated spectra at 51–54 GHz. The sign of bias depends on the absorption model. A thorough investigation of the error budget points to a spectroscopic nature of the observed differences. The dependence of the results on the elevation angle and absorption model can be explained by the basic properties of radiative transfer and by cloud contamination at elevation angles.

The elevation angle of the vagina (EAV) following different pelvic reconstructive procedures

2018 ◽  
Author(s):  
J Neymeyer ◽  
AY Weintraub ◽  
S Weinberger ◽  
DE Moldovan ◽  
K Kornienko ◽  
...  
Keyword(s):  
Elevation Angle ◽  
Reconstructive Procedures

60-GHz-Band Switched-Beam Eight-Sector Antenna with SP8T Switch for 180° Azimuth Scan

2010 ◽  
Vol E93-B (3) ◽  
pp. 551-559 ◽  
Author(s):  
Amane MIURA ◽  
Masataka OHIRA ◽  
Shoichi KITAZAWA ◽  
Masazumi UEBA
Keyword(s):  
60 Ghz

60-GHz Band Copper Ball Vertical Interconnection for MMW 3-D System-in-Package Front-End Modules

2012 ◽  
Vol E95.C (7) ◽  
pp. 1276-1284 ◽  
Author(s):  
Satoshi YOSHIDA ◽  
Shoichi TANIFUJI ◽  
Suguru KAMEDA ◽  
Noriharu SUEMATSU ◽  
Tadashi TAKAGI ◽  
...  
Keyword(s):  
60 Ghz ◽  
Front End ◽  
Vertical Interconnection

A 60-GHz Phase-Locked Loop with Inductor-Less Wide Operation Range Prescaler in 90-nm CMOS

2009 ◽  
Vol E92-C (6) ◽  
pp. 785-791 ◽  
Author(s):  
Hiroaki HOSHINO ◽  
Ryoichi TACHIBANA ◽  
Toshiya MITOMO ◽  
Naoko ONO ◽  
Yoshiaki YOSHIHARA ◽  
...  
Keyword(s):  
Phase Locked Loop ◽  
60 Ghz

A 60 GHz High Gain Transformer-Coupled Differential Cascode Power Amplifier in 65 nm CMOS

2011 ◽  
Vol E94-C (10) ◽  
pp. 1508-1514
Author(s):  
Jenny Yi-Chun LIU ◽  
Mau-Chung Frank CHANG
Keyword(s):  
Power Amplifier ◽  
High Gain ◽  
60 Ghz
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