Research on the Applications and Measurements of the Microwave Technology

2014 ◽  
Vol 556-562 ◽  
pp. 3176-3179
Author(s):  
Ming Zhe Qu
Keyword(s):  
Far Infrared ◽  
Infrared Light ◽  
Radio Waves ◽  
Microwave Technology ◽  
Broad Bandwidth ◽  
High Data ◽  
Fields Of Study ◽  
Radio Broadcasting ◽  
Point To Point ◽  
Transmitted Frequency

Microwave technology is extensively used for point-to-point telecommunications. Microwaves are especially suitable for this use since they are more easily focused into narrower beams than radio waves, allowing frequency reuse; their comparatively higher frequencies allow broad bandwidth and high data transmission rates, and antenna sizes are smaller than at lower frequencies because antenna size is inversely proportional to transmitted frequency. Microwaves are used in spacecraft communication, and much of the world’s data, TV, and telephone communications are transmitted long distances by microwaves between ground stations and communications satellites. Microwaves are also employed in microwave ovens and in radar technology. The prefix “micro-” in “microwave” indicates that microwaves are “small” compared to waves used in typical radio broadcasting, in that they have shorter wavelengths. The boundaries between far infrared light, terahertz radiation, microwaves, and ultra-high-frequency radio waves are fairly arbitrary and are used variously between different fields of study.

scholarly journals Coherence tomography with broad bandwidth extreme ultraviolet and soft X-ray radiation

2021 ◽  
Vol 127 (4) ◽  
Author(s):  
S. Skruszewicz ◽  
S. Fuchs ◽  
J. J. Abel ◽  
J. Nathanael ◽  
J. Reinhard ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Near Infrared ◽  
Extreme Ultraviolet ◽  
Infrared Light ◽  
Imaging Method ◽  
Optical Coherence ◽  
Axial Resolution ◽  
Cross Sectional ◽  
X Ray ◽  
Broad Bandwidth

AbstractWe present an overview of recent results on optical coherence tomography with the use of extreme ultraviolet and soft X-ray radiation (XCT). XCT is a cross-sectional imaging method that has emerged as a derivative of optical coherence tomography (OCT). In contrast to OCT, which typically uses near-infrared light, XCT utilizes broad bandwidth extreme ultraviolet (XUV) and soft X-ray (SXR) radiation (Fuchs et al in Sci Rep 6:20658, 2016). As in OCT, XCT’s axial resolution only scales with the coherence length of the light source. Thus, an axial resolution down to the nanometer range can be achieved. This is an improvement of up to three orders of magnitude in comparison to OCT. XCT measures the reflected spectrum in a common-path interferometric setup to retrieve the axial structure of nanometer-sized samples. The technique has been demonstrated with broad bandwidth XUV/SXR radiation from synchrotron facilities and recently with compact laboratory-based laser-driven sources. Axial resolutions down to 2.2 nm have been achieved experimentally. XCT has potential applications in three-dimensional imaging of silicon-based semiconductors, lithography masks, and layered structures like XUV mirrors and solar cells.

scholarly journals Thermal non-line-of-sight imaging from specular and diffuse reflections

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Masaki Kaga ◽  
Takahiro Kushida ◽  
Tsuyoshi Takatani ◽  
Kenichiro Tanaka ◽  
Takuya Funatomi ◽  
...  
Keyword(s):  
Angular Distribution ◽  
Heat Source ◽  
Real World ◽  
Diffuse Reflection ◽  
Far Infrared ◽  
Infrared Light ◽  
Line Of Sight ◽  
Thermal Camera ◽  
Reflection Component ◽  
Non Line Of Sight

Abstract This paper presents a non-line-of-sight technique to estimate the position and temperature of an occluded object from a camera via reflection on a wall. Because objects with heat emit far infrared light with respect to their temperature, positions and temperatures are estimated from reflections on a wall. A key idea is that light paths from a hidden object to the camera depend on the position of the hidden object. The position of the object is recovered from the angular distribution of specular and diffuse reflection component, and the temperature of the heat source is recovered from the estimated position and the intensity of reflection. The effectiveness of our method is evaluated by conducting real-world experiments, showing that the position and the temperature of the hidden object can be recovered from the reflection destination of the wall by using a conventional thermal camera.

scholarly journals Interferometric characterization of 160 fs far‐infrared light pulses

1991 ◽  
Vol 59 (8) ◽  
pp. 893-895 ◽  
Author(s):  
B. I. Greene ◽  
J. F. Federici ◽  
D. R. Dykaar ◽  
R. R. Jones ◽  
P. H. Bucksbaum
Keyword(s):  
Far Infrared ◽  
Infrared Light ◽  
Light Pulses

Simple System for Generation and Detection of Tunable-Frequency Far Infrared Light

1999 ◽  
Vol 38 (Part 1, No. 1A) ◽  
pp. 77-84 ◽  
Author(s):  
Toshihiro Hori ◽  
Norihisa Hiromoto ◽  
Masayuki Izutsu
Keyword(s):  
Far Infrared ◽  
Simple System ◽  
Infrared Light ◽  
Tunable Frequency

Density Fluctuation Measurement by Far Infrared Light Scattering

1982 ◽  
Vol T2B ◽  
pp. 459-466 ◽  
Author(s):  
D Grésillon ◽  
C Stern ◽  
A Hémon ◽  
A Truc ◽  
T Lehner ◽  
...  
Keyword(s):  
Light Scattering ◽  
Density Fluctuation ◽  
Far Infrared ◽  
Infrared Light ◽  
Fluctuation Measurement

scholarly journals New Design of 60 GHz MIMO 2x4 Patch Rectangular Antenna Array for Wireless Gigabit (Wi-Gig) Application

2019 ◽  
Vol 2 (1) ◽  
pp. 6-9
Author(s):  
Yusnita Rahayu
Keyword(s):  
Return Loss ◽  
Simulation Software ◽  
Propagation Loss ◽  
60 Ghz ◽  
Broad Bandwidth ◽  
High Data ◽  
Rectangular Patch ◽  
Fifth Generation ◽  
The World ◽  
Indoor And Outdoor

Nowadays, most antenna researchers over the world are focusing on the design of the antenna for the fifth generation (5G) application (indoor and outdoor). High intensive research on 60 GHz antenna for high data rate indoor communication is becoming a trending topic. The high propagation loss at this band is the most challenging. The antenna needs to have higher gain to overcome the loss. Such antenna designs have been proposed recently. This paper, a new MIMO 2x4 patch rectangular antenna operating at 60 GHz is designed for Wi-Gig application. The rectangular patch antenna has 1.75 mm x 1.54 mm of size, printed on Rogers Duroid RT 5880 substrate, the dielectric constant of 2.20 and loss tangent of 0,0009. The antenna was designed and simulated using CST simulation software.  The simulated return loss showed a very consistent characteristic. The return loss reached −30 dB at 60 GHz.  The broad bandwidth obtained is 4.3 GHz concerning -10 dB. The omnidirectional radiation pattern with 13.4 dBi of gain is obtained. This antenna meets the Wi-Gig requirement.

Sign in / Sign up

Export Citation Format

Share Document