scholarly journals Photonic Millimeter-Wave Generation and Distribution Techniques for Millimeter/Sub-Millimeter Wave Radio Interferometer Telescope

10.5772/8664 ◽  
2010 ◽  
Author(s):  
Hitoshi Kiuchi ◽  
Tetsuya Kawanishi
Keyword(s):  
Millimeter Wave ◽  
Wave Generation ◽  
Radio Interferometer ◽  
Wave Radio

scholarly journals AN EXPERIMENTAL STUDY OF THE PENETRATION OF CYLINDRICAL PROJECTILES INTO DRY SAND

2020 ◽  
Vol 82 (3) ◽  
pp. 283-295
Author(s):  
V.V. Balandin ◽  
Vl.Vl. Balandin ◽  
V.V. Parkhachev
Keyword(s):  
Millimeter Wave ◽  
High Speed ◽  
Radio Interferometer ◽  
Wave Radio ◽  
Ballistic Experiment ◽  
Wide Range ◽  
Measurement Results ◽  
Complete Study ◽  
Direct Experiment ◽  
Dry Sand

For the most complete study of the laws of shock interaction of solids with soil barriers, further development of experimental techniques for recording the parameters of the interaction process in direct and inverse experiments is necessary. In this work, to determine the parameters of the movement of the projectile (displacement and speed) in a direct experiment, a millimeter-wave radio interferometer is used. This method allows continuous recording of the movement of the rear end of the striker with high accuracy over a wide range of movements. Using the proposed technique, experiments were carried out to record the motion parameters of cylindrical impactors made of steel and aluminum alloy when interacting with an obstacle made of dry sand. At the same time, the movement of the rear end of the striker was also controlled using high-speed filming until the full immersion of the striker. The experiments showed that the measurement results obtained using two methods coincide within the measurement error. Based on the experiments, it can be concluded that the methodology for determining the displacement and velocity of a projectile in a ballistic experiment using a millimeter-wave radio interferometer allows continuous measurement of large displacements (100 mm or more), including when completely immersed in a target with sufficient practical goals accuracy. Based on the results of the experiments, the dependences of the movement of the projectile and its speed on time are constructed. A change in the penetration law was found with a decrease in the penetration velocity to values less than 100 m/s.

Transmission of Duobinary Signal in Optical 40 GHz Millimeter-Wave Radio-Over-Fiber Systems Utilizing Dual-Arm LiNbO3 Mach–Zehnder Modulator for Downstream

2016 ◽  
Vol 37 (2) ◽  
Author(s):  
Nguyen Dong-Nhat ◽  
Amin Malekmohammadi
Keyword(s):  
Millimeter Wave ◽  
Wave Generation ◽  
Radio Over Fiber ◽  
Wave Radio ◽  
Mach Zehnder Modulator ◽  
First Time ◽  
Dual Arm

AbstractIn this paper, for the first time transmission of 2.5 Gb/s duobinary signal is investigated for the downlink direction in 40 GHz optical millimeter-wave generation or up-conversion, utilizing a dual-arm

Waveguide and antenna coupled travelling-wave 1.55-μm photodetectors for optical (sub)millimeter-wave generation

2004 ◽  
Author(s):  
Andrei Malcoci ◽  
Andreas Stohr ◽  
Andres Sauerwald ◽  
Sven Schulz ◽  
Dieter Jager
Keyword(s):  
Millimeter Wave ◽  
Travelling Wave ◽  
Wave Generation
Sign in / Sign up

Export Citation Format

Share Document