scholarly journals An Ultra-Compact X-Band Dual-Polarized Slotted Waveguide Array Unit Cell for Large E-Scanning Radar Systems

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 210651-210662
Author(s):  
Nafati Aboserwal ◽  
Jorge L. Salazar-Cerreno ◽  
Zeeshan Qamar
Keyword(s):  
Unit Cell ◽  
Waveguide Array ◽  
Radar Systems ◽  
X Band ◽  
Dual Polarized ◽  
Slotted Waveguide

scholarly journals Design of a Planar Array of Low Profile Horns at 28 GHz

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6989
Author(s):  
Jou-Yi Wang ◽  
Malcolm Ng Mou Kehn ◽  
Eva Rajo-Iglesias
Keyword(s):  
Millimeter Wave ◽  
Dielectric Materials ◽  
Waveguide Array ◽  
Wave Regime ◽  
Metal Solution ◽  
Radar Systems ◽  
Low Profile ◽  
Planar Array ◽  
Slotted Waveguide ◽  
Very High

A planar array of low profile horns fed by a transverse slotted waveguide array in the low millimeter-wave regime (28 GHz) is presented. The array of transverse slots cannot be directly used as antenna as it has grating lobes due to the fact that slot elements must be spaced a guided wavelength. However, these slots can be transformed into low profile horns that with their radiation patterns attenuate the grating lobes. To this aim, low profile horns with less than 0.6λ0 height were designed. The horns include a couple of chips that contribute to further reduce the grating lobes especially in the H-plane. The good performance of the designed array was demonstrated by both simulations and experiments performed on a manufactured prototype. A 5 × 5 array was designed that has a measured realized gain of 26.6 dBi with a bandwidth below 2%, still useful for some applications such as some radar systems. The total electrical size of the array is 6.63λ0× 6.63λ0. The radiation efficiency is very high and the aperture efficiency is above 80%. This all-metal solution is advantageous for millimeter-wave applications where losses sustained by dielectric materials become severe and it can be easily scaled to higher frequencies.

A DESIGN SOLUTION FOR COMPACT SLOTTED WAVEGUIDE ARRAY ANTENNAS BASED ON SIW TECHNOLOGY

2021 ◽  
pp. 22-29
Author(s):  
Viet
Keyword(s):  
Microwave Frequency ◽  
Array Antenna ◽  
Design Solution ◽  
Waveguide Array ◽  
Practical Applications ◽  
Array Antennas ◽  
Novel Approach ◽  
X Band ◽  
Slotted Waveguide ◽  
Antenna Systems

Slotted waveguide array antenna is a crucial structure in microwave frequency antennas with many applications in radar and communications systems. Previously, slotted waveguide array antenna systems mainly used metal materials. The study of slotted array antenna based on the waveguided with SIW (Substrate Integrated Waveguide) technology is a novel approach. The paper presents the results of researching, designing, and manufacturing waveguide slot array antenna with low SLL using SIW technology in X-band. The results will be an essential basis for selecting a design solution for slotted waveguide array antenna by SIW technology to replace traditional metal slot array antennas in practical applications in X band radar antenna systems.

scholarly journals Design of a Planar Slotted Waveguide Array Antenna for X-band Radar Applications

2011 ◽  
Vol 11 (2) ◽  
pp. 97-104 ◽  
Author(s):  
Rashid Ahmad Bhatti ◽  
Byeong-Yong Park ◽  
Yun-Taek Im ◽  
Seong-Ook Park
Keyword(s):  
Array Antenna ◽  
Waveguide Array ◽  
X Band ◽  
Radar Applications ◽  
Slotted Waveguide

scholarly journals Attenuation Correction and Hydrometeor Classification of High-Resolution, X-band, Dual-Polarized Mobile Radar Measurements in Severe Convective Storms

2010 ◽  
Vol 27 (12) ◽  
pp. 1979-2001 ◽  
Author(s):  
Jeffrey C. Snyder ◽  
Howard B. Bluestein ◽  
Guifu Zhang ◽  
Stephen J. Frasier
Keyword(s):  
High Resolution ◽  
Attenuation Correction ◽  
Dual Frequency ◽  
Dual Polarization ◽  
Frequency Method ◽  
High Resolution Data ◽  
Convective Storms ◽  
Radar Systems ◽  
X Band ◽  
Dual Polarized

Abstract X-band and shorter radar wavelengths are preferable for mobile radar systems because a narrow beam can be realized with a moderately sized antenna. However, attenuation by precipitation becomes progressively more severe with decreasing radar wavelength. As a result, X band has become a popular choice for meteorological radar systems that balances these two considerations. Dual-polarization provides several methods by which this attenuation (and differential attenuation) can be detected and corrected, mitigating one of the primary disadvantages of X-band radars. The dynamics of severe convective storms depend, to some extent, on the distribution and type of hydrometeors within the storm. To estimate the three-dimensional distribution of hydrometeors using X-band radar data, it is necessary to correct for attenuation before applying commonly used hydrometeor classification algorithms. Since 2002, a mobile dual-polarized Doppler weather radar designed at the University of Massachusetts, Amherst has been used to collect high-resolution data in severe convective storms in the plains. This study tests several attenuation correction procedures using dual-polarization measurements, along with a dual-frequency method using S-band Weather Surveillance Radar-1988 Doppler (WSR-88D) and KOUN data. After correcting for attenuation and differential attenuation, a fuzzy logic hydrometeor classification algorithm, modified for X band with KOUN data as a reference, is used to attempt a retrieval of hydrometeor types in observed severe convective storms.

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