scholarly journals Design and Optimization for 77 GHz Series-Fed Patch Array Antenna Based on Genetic Algorithm

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3066 ◽  
Author(s):  
Shuo Yang ◽  
Lijun Zhang ◽  
Jun Fu ◽  
Zhanqi Zheng ◽  
Xiaobin Zhang ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Array Antenna ◽  
Sidelobe Suppression ◽  
Automotive Radar ◽  
Sidelobe Level ◽  
Design And Optimization ◽  
Measurement Results ◽  
Antenna Length ◽  
Half Power ◽  
77 Ghz

This paper proposes a method for designing a 77 GHz series-fed patch array antenna. Based on the traditional genetic algorithm, the study explores different array topologies consisting of the same microstrip patches to optimize the design. The main optimization goal is to reduce the maximum sidelobe level (SLL). A 77 GHz series-fed patch array antenna for automotive radar was simulated, fabricated, and measured by employing this method. The antenna length was limited to no longer than 3 cm, and the array only had a single compact series with the radiation patch about 1.54 mm wide. In the genetic algorithm used for optimization, the maximum sidelobe level was set equal to or less than −14 dB. The measurement results show that the gain of the proposed antenna was about 15.6 dBi, E-plane half-power beamwidth was about ±3.8°, maximum sidelobe level was about −14.8 dB, and H-plane half-power beamwidth was about ±30° at 77 GHz. The electromagnetic simulation and the measurement results show that the 77 GHz antenna designed with the proposed method has a better sidelobe suppression by over 4 dB than the traditional one of the same length in this paper.

scholarly journals Sidelobe Suppression in Array-Pattern Synthesis Using Periodic Leaky-Wave Antenna and Binomial Array

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Hicham Aziz ◽  
Mahmoud Moubadir ◽  
Abdelkrim Farkhsi ◽  
Naima Amar Touhami
Keyword(s):  
Antenna Array ◽  
Sidelobe Suppression ◽  
Sidelobe Level ◽  
Leaky Wave ◽  
Pattern Synthesis ◽  
Array Pattern ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Measurement Results ◽  
Good Agreement

This paper presents the conception and realization of a 2D antenna array using periodic leaky-wave antenna (PLWA) and the binomial array (BA) at 6 GHz as the application of WLAN. The series array of periodic leaky-wave antenna was provided by an array of five rectangular Patches connected by cross lines. The nonuniform amplitudes of the binomial array are used to reduce the sidelobe level; in this way, the center source radiates strongly on the broadside. The prototype of the proposed 2D antenna array is designed, fabricated, and tested. A good agreement is obtained between simulated and measurement results.

scholarly journals Analysis of multipath and DOA detection using a fully polarimetric automotive radar

2018 ◽  
Vol 10 (5-6) ◽  
pp. 570-577 ◽  
Author(s):  
Tristan Visentin ◽  
Jürgen Hasch ◽  
Thomas Zwick
Keyword(s):  
Multipath Propagation ◽  
Radial Distance ◽  
Doa Estimation ◽  
Complex Environments ◽  
Angle Of Arrival ◽  
Automotive Radar ◽  
New Approach ◽  
Measurement Results ◽  
Radar Measurements ◽  
77 Ghz

AbstractMultipath propagation occurs in many situations of radar measurements in complex environments. The unwanted effects range from interference over the radar channels, which causes amplitude fading and a corrupted direction of arrival (DOA) estimation, to the detection of ghost targets in an angle of arrival of the multipath direction. Due to the different number of reflections, polarimetric radars are capable to separate certain multipaths from direct paths if the target is known in advance. Furthermore, it is possible to separate objects with different polarimetric features in DOA that are located in the same radial distance to the radar. In this paper, a new approach to DOA detection based on the coherent Pauli decomposition is presented. With this approach, important multipath and DOA effects are analyzed and measurement results at 77 GHz on canonical objects in an anechoic chamber are presented. The results prove the feasibility of the approach and demonstrate the occurring effects.

scholarly journals Design and Optimization of Genetic Algorithm (GA) based High Gain and Directive CPW-Fed Slot Dipole Antenna for Wideband Applications

2019 ◽  
Vol 9 (2) ◽  
pp. 2572-2575
Keyword(s):  
Genetic Algorithm ◽  
Return Loss ◽  
High Gain ◽  
Dipole Antenna ◽  
Design And Optimization ◽  
X Band ◽  
Measurement Results ◽  
Loss Parameter ◽  
Operating Bandwidth ◽  
Wide Operating

Genetic Algorithm (GA) is proposed in this paper for the design of a wide bandwidth, high gain and directive CPW-fed slot-dipole antenna. The proposed antenna is built on a FR4 substrate that is cheap and easy to produce. Genetic Algorithm is used to select parameters that reflect antenna geometry to achieve wider bandwidth and reduced return loss (parameter S11) and high gain values at resonant frequency. The antenna design shows a wide operating bandwidth of 1.4 GHz (simulated) and 1.3 GHz (measured) over the X-band, a return loss (S11) of -25.83 dB (simulated) and -23.08 (measured) and a gain and directivity of 5.61 dB (simulated) and 11.87 dB (simulated) at 10.5 GHz resonating frequencies. In this work, all simulations were performed using the ANSYS HFSS v14.0 software. A prototype antenna was produced and then characterized using VNA to validate the design. Measurement results were in good agreement with the results simulated using ANSYS HFSS.

scholarly journals Design and Simulation of Microstrip Comb-Line Array Antenna at 78.5GHz for Automotive Radar Applications

2020 ◽  
Vol 9 (5) ◽  
pp. 696-699
Keyword(s):  
Side Lobe ◽  
Travelling Wave ◽  
Substrate Material ◽  
Array Antenna ◽  
Side Lobe Level ◽  
Automotive Radar ◽  
Sidelobe Level ◽  
Line Array ◽  
Linearly Polarized ◽  
Radar Applications

The design of low side lobe level 45 degree linearly polarized microstrip comb-line shaped travelling wave array antenna for 77GHz automotive radar applications is presented. The 20 elements array is designed on Astra Isola substrate material. Variable width radiating elements are incorporated in the design to utilize an amplitude tapering technique to achieve lower sidelobe level. Taylor distribution is used to determine voltage excitation. The measured gain is found to be around 16.23dB and the side lobe level of -14.28dB at 78.5GHz.

An Array Antenna for Both Long- and Medium-Range 77 GHz Automotive Radar Applications

2017 ◽  
Vol 65 (12) ◽  
pp. 7207-7216 ◽  
Author(s):  
Jun Xu ◽  
Wei Hong ◽  
Hui Zhang ◽  
Guolong Wang ◽  
Yingrui Yu ◽  
...  
Keyword(s):  
Array Antenna ◽  
Automotive Radar ◽  
Medium Range ◽  
Radar Applications ◽  
77 Ghz
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