scholarly journals Compact Slotted Waveguide Antenna Array Using Staircase Model of Tapered Dielectric-Inset Guide for Shipboard Marine Radar

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4745
Author(s):  
Kyei Anim ◽  
Henry Abu Diawuo ◽  
Young-Bae Jung
Keyword(s):  
Numerical Simulations ◽  
Dielectric Material ◽  
High Gain ◽  
Angular Speed ◽  
Low Density ◽  
X Band ◽  
Radar Applications ◽  
Marine Radar ◽  
Slotted Waveguide ◽  
Scanning Mechanism

This paper presents a new configuration of a slotted waveguide antenna (SWA) array aimed at the X-band within the desired band of 9.38~9.44 GHz for shipboard marine radars. The SWA array, which typically consists of a slotted waveguide, a polarizing filter, and a metal reflector, is widely employed in marine radar applications. Nonetheless, conventional slot array designs are weighty, mechanically complex, and geometrically large to obtain high performances, such as gain. These features of the conventional SWA are undesirable for the shipboard marine radar, where the antenna rotates at high angular speed for the beam scanning mechanism. The proposed SWA array herein reduces the conventional design’s size by 62% using a tapered dielectric-inset guide structure. It shows high gain performance (up to 30 dB) and obtains improvements in radiation efficiency (up to 80% in the numerical simulations) and weight due to the use of loss and low-density dielectric material.

scholarly journals Design and Performance Analysis of Linear Array Microstrip Antennas with Mitered-Bends Feeding Network for X-Band Radar Applications

2020 ◽  
Vol 20 (1) ◽  
pp. 9
Author(s):  
Bidadariana Yunia Utami Putri ◽  
Eka Setia Nugraha ◽  
Anantia Prakasa ◽  
Subroto Fajar Siddiq
Keyword(s):  
Linear Array ◽  
High Gain ◽  
Microstrip Antennas ◽  
Small Particles ◽  
High Frequencies ◽  
X Band ◽  
Network Method ◽  
Radar Applications ◽  
And Performance ◽  
Radar Antenna

To accurately detect objects, the radar antenna must have a high gain for the desired range. The antenna uses an array method to increase the gain. It has a unidirectional radiation pattern to meet the X-band radar implementation as a ship navigation tool. The X-band radar works at high frequencies. Thus, it will be more sensitive in detecting small particles, including rain particles. The use of a mitered-bends feeding network method by cutting the 90-degree curve is to maximize the power transmitted to reduce losses. This method spreads the bandwidth of the antenna. The antenna is designed and fabricated into a linear array of 8 elements, using the R04003C Rogers substrate with a microstrip line supply. This study limits up to 8 elements of radiation, followed by the addition of a method to expand the bandwidth of antennas. Considering material limitation and duration of antenna design. The final antenna dimensions are 142.40 mm × 42.8 mm. The measuring results show fc = 9.496 GHz, S11 = -32.64 dB, VSWR 1.05, bandwidth = 41.9 MHz (9.5159 GHz - 9.4740 GHz), and gain 8.8 dB as well as a linear polarized antenna with unidirectional pattern direction. The radar antenna tends to have a narrow beamwidth and high gain.

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

Wideband High Gain Cylindrical Dielectric Resonator Antenna for X-Band Applications

Frequenz ◽  
2019 ◽  
Vol 73 (3-4) ◽  
pp. 109-116
Author(s):  
Nipun K. Mishra ◽  
Soma Das ◽  
Dinesh K. Vishwakarma
Keyword(s):  
Dielectric Resonator ◽  
Satellite Communication ◽  
Dielectric Material ◽  
Wide Band ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
X Band ◽  
Feed Network ◽  
High Dielectric

Abstract In present work a wide band and high gain cylindrical dielectric resonator antenna working in X-band has been designed and validated experimentally. First the bandwidth of the antenna has been enhanced by placing the thin dielectric layer between antenna and feed network. Next gain of the antenna has been increased by placing a layer of high dielectric material at nearly λ/2 distance as superstrate. The proposed design with impedance bandwidth of 3 GHz and gain nearly 11dBi could be used in satellite communication and other wideband wireless applications operating in X-band.

scholarly journals A 2×2 Antenna Array for X Band Phased Array RADAR Applications

2019 ◽  
Vol 9 (1S5) ◽  
pp. 172-174
Keyword(s):  
Antenna Array ◽  
Phased Array ◽  
Dielectric Material ◽  
Low Cost ◽  
Operating Frequency ◽  
Phase Array ◽  
Rectangular Patch ◽  
X Band ◽  
Radar Applications ◽  
Coaxial Probe

A Four element rectangular patch antenna array has been designed for the Phase array RADAR applications in the X Band with an operating frequency of 10GHz. The four patches are been connected to four different transmitter circuit with which we can control the phase of the input signal. A 50Ω coaxial probe feed has been used to excite the antenna. The overall dimension of the antenna is 212mm×212mm×1.6mm. The Proposed antenna is having an gain of 10.2dB at the operating frequency of 10GHz. The directivity of the antenna at the operating frequency is 10.31dB. Low cost FR4 material is been used as the laminate base for the antenna which will act as the dielectric material.

scholarly journals High-Gain Vivaldi Antenna with Wide Bandwidth Characteristics for 5G Mobile and Ku-Band Radar Applications

Electronics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 667
Author(s):  
Raza Ullah ◽  
Sadiq Ullah ◽  
Farooq Faisal ◽  
Rizwan Ullah ◽  
Dong-you Choi ◽  
...  
Keyword(s):  
Mobile Communication ◽  
Middle Layer ◽  
Bottom Layer ◽  
High Gain ◽  
Mirror Image ◽  
Radar Applications ◽  
Vivaldi Antenna ◽  
5G Mobile Communication ◽  
Element Array ◽  
Ku Band

In this paper, antipodal Vivaldi antenna is designed for 5th generation (5G) mobile communication and Ku-band applications. The proposed designed has three layers. The upper layer consists of eight-element array of split-shaped leaf structures, which is fed by a 1-to-8 power divider network. Middle layer is a substrate made of Rogers 5880. The bottom layer consists of truncated ground and shorter mirror-image split leaf structures. The overall size of the designed antenna is confined significantly to 33.31 × 54.96 × 0.787 (volume in mm3), which is equivalent to 2λo× 3.3λo× 0.05λo (λo is free-space wavelength at 18 GHz). Proposed eight elements antenna is multi-band in nature covering Ku-bands (14.44–20.98 GHz), two millimeter wave (mmW) bands i.e., 24.34–29 GHz and 33–40 GHz, which are candidate frequency bands for 5G communications. The Ku-Band is suitable for radar applications. Proposed eight elements antenna is very efficient and has stable gain for 5G mobile communication and Ku-band applications. The simulation results are experimentally validated by testing the fabricated prototypes of the proposed design.

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