The Ka-band 10-kW continuous wave gyrotron with wide-band fast frequency sweep

2012 ◽  
Vol 83 (7) ◽  
pp. 074706 ◽  
Author(s):  
M. Glyavin ◽  
A. Luchinin ◽  
M. Morozkin
Keyword(s):  
Continuous Wave ◽  
Wide Band ◽  
Frequency Sweep ◽  
Ka Band

Continuous Wave Operation of a Ka-Band Broadband High-Power Sheet Beam Traveling-Wave Tube

2021 ◽  
pp. 1-1
Author(s):  
Jianxun Wang ◽  
Yixin Wan ◽  
Xinjie Li ◽  
Qiang Liu ◽  
Hao Li ◽  
...  
Keyword(s):  
High Power ◽  
Traveling Wave ◽  
Continuous Wave ◽  
Traveling Wave Tube ◽  
Wave Tube ◽  
Ka Band ◽  
Continuous Wave Operation

Development of a water load for a Ka-band 10 kW continuous-wave gyrotron in an ECR ion source system

2015 ◽  
Vol 66 (3) ◽  
pp. 349-352 ◽  
Author(s):  
Jung-Woo Ok ◽  
Seyong Choi ◽  
Byoung-Seob Lee ◽  
Jang-Hee Yoon ◽  
Jin Yong Park ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Ion Source ◽  
Ecr Ion Source ◽  
Water Load ◽  
Ka Band

scholarly journals Low-Cost Ka-Band Cloud Radar System for Distributed Measurements within the Atmospheric Boundary Layer

2020 ◽  
Vol 12 (23) ◽  
pp. 3965
Author(s):  
Roberto Aguirre ◽  
Felipe Toledo ◽  
Rafael Rodríguez ◽  
Roberto Rondanelli ◽  
Nicolas Reyes ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Low Cost ◽  
Medium Size ◽  
Physical Parameters ◽  
Mountain Range ◽  
Ka Band ◽  
Range Resolution ◽  
Cloud Radar ◽  
Marine Stratus ◽  
Application Fields

Radars are used to retrieve physical parameters related to clouds and fog. With these measurements, models can be developed for several application fields such as climate, agriculture, aviation, energy, and astronomy. In Chile, coastal fog and low marine stratus intersect the coastal topography, forming a thick fog essential to sustain coastal ecosystems. This phenomenon motivates the development of cloud radars to boost scientific research. In this article, we present the design of a Ka-band cloud radar and the experiments that prove its operation. The radar uses a frequency-modulated continuous-wave with a carrier frequency of 38 GHz. By using a drone and a commercial Lidar, we were able to verify that the radar can measure reflectivities in the order of −60 dBZ at 500 m of distance, with a range resolution of 20 m. The lower needed range coverage imposed by our case of study enabled a significant reduction of the instrument cost compared to existent alternatives. The portability and low-cost of the designed instrument enable its implementation in a distributed manner along the coastal mountain range, as well as its use in medium-size aerial vehicles or balloons to study higher layers. The main features, limitations, and possible improvements to the current instrument are discussed.

scholarly journals Radar Imager for Mars’ Subsurface Experiment—RIMFAX

2020 ◽  
Vol 216 (8) ◽  
Author(s):  
Svein-Erik Hamran ◽  
David A. Paige ◽  
Hans E. F. Amundsen ◽  
Tor Berger ◽  
Sverre Brovoll ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Sand Dunes ◽  
Landing Site ◽  
Wide Band ◽  
Center Frequency ◽  
Depth Range ◽  
Fmcw Radar ◽  
Shallow Subsurface ◽  
Eventual Return ◽  
Ground Penetrating

AbstractThe Radar Imager for Mars’ Subsurface Experiment (RIMFAX) is a Ground Penetrating Radar on the Mars 2020 mission’s Perseverance rover, which is planned to land near a deltaic landform in Jezero crater. RIMFAX will add a new dimension to rover investigations of Mars by providing the capability to image the shallow subsurface beneath the rover. The principal goals of the RIMFAX investigation are to image subsurface structure, and to provide information regarding subsurface composition. Data provided by RIMFAX will aid Perseverance’s mission to explore the ancient habitability of its field area and to select a set of promising geologic samples for analysis, caching, and eventual return to Earth. RIMFAX is a Frequency Modulated Continuous Wave (FMCW) radar, which transmits a signal swept through a range of frequencies, rather than a single wide-band pulse. The operating frequency range of 150–1200 MHz covers the typical frequencies of GPR used in geology. In general, the full bandwidth (with effective center frequency of 675 MHz) will be used for shallow imaging down to several meters, and a reduced bandwidth of the lower frequencies (center frequency 375 MHz) will be used for imaging deeper structures. The majority of data will be collected at regular distance intervals whenever the rover is driving, in each of the deep, shallow, and surface modes. Stationary measurements with extended integration times will improve depth range and SNR at select locations. The RIMFAX instrument consists of an electronic unit housed inside the rover body and an antenna mounted externally at the rear of the rover. Several instrument prototypes have been field tested in different geological settings, including glaciers, permafrost sediments, bioherme mound structures in limestone, and sedimentary features in sand dunes. Numerical modelling has provided a first assessment of RIMFAX’s imaging potential using parameters simulated for the Jezero crater landing site.

Wide-band continuous-wave terahertz source with a vertically integrated photomixer

2009 ◽  
Vol 95 (16) ◽  
pp. 161102 ◽  
Author(s):  
E. Peytavit ◽  
J-F. Lampin ◽  
F. Hindle ◽  
C. Yang ◽  
G. Mouret
Keyword(s):  
Continuous Wave ◽  
Wide Band ◽  
Terahertz Source
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