Query Result Set
Skip Navigation Links
   ActiveUsers:404Hits:21075343Skip Navigation Links
Show My Basket
Contact Us
IDSA Web Site
Ask Us
Today's News
HelpExpand Help
Advanced search

  Hide Options
Sort Order Items / Page
MILLIMETER WAVE (2) answer(s).
 
SrlItem
1
ID:   141878


94 ghz radiometer for benchmarking its operational parameters for the remote detecton of concealed threat / Kumar, Ashok; Jassal, B S   Article
Kumar, Ashok Article
0 Rating(s) & 0 Review(s)
Summary/Abstract Standoff detection of concealed threat, using millimeter wave radiometer, is being experimented worldwide for enhancing the frame rate and detection probability, as an alternative to personnel frisking, for enhancing passenger service rate and avoiding exposure to harmful radiations. The development of 94 GHz Dicke radiometer and experimentation to bench mark its operational parameters like spatial sampling rate, scan rate and dwell time for the detection of concealed threat, under the fabrics of a human is described. The experimentation provided operational methodology and imaging phenomenology in a given background for the detection of metallic threats. The experimental results have established that radiometer can be considered as an alternate to frisking of personnel and celebrities at public places for security reasons.
        Export Export
2
ID:   138634


Omni-directional slotted waveguide antenna with low omni ripple at MM wave / Verma , Pramendra Kumar; Kumar , Raj ; Singh , Mahakar   Article
Verma , Pramendra Kumar Article
0 Rating(s) & 0 Review(s)
Summary/Abstract The paper describes the design, simulation, and realisation of a slotted waveguide based horizontally polarized omni-directional antenna at millimeter wave frequency. This design has been optimised for minimum ripple in omni pattern and wide elevation coverage. It is based on radiating slots on both sides of waveguide for generating omni pattern and reduced height waveguide along with metallic wings on both sides used to obtain minimum omni pattern variation. The designed antenna has been simulated on finite element method-based ANSYS’s HFSS EM Simulator software using proper boundary conditions. A metallic strip on both side of slot on upper face of antenna has been used to provide flatness as well as strength to antenna. The antenna has the advantages of being robust, low cost, and easy to fabricate being in waveguide configuration. Measured VSWR of antenna is less than 2.0 over the frequency band of 37-40 GHz and minimum omni gain of the antenna is 0 dBi over the frequency band.
        Export Export