A Frequency Scanning Array Antenna Based on Magneto-Electric Dipole Structure With Enhanced Scanning Range and Gain Flatness

2020 ◽  
Author(s):  
Ronggang Huang ◽  
Yiling Shi ◽  
Wenquan Cao ◽  
Wenyu Ma ◽  
Shujie Shi
Keyword(s):  
Electric Dipole ◽  
Array Antenna ◽  
Dipole Structure ◽  
Frequency Scanning ◽  
Scanning Range

scholarly journals A Wide Frequency Scanning Printed Bruce Array Antenna with Bowtie and Semi-Circular Elements

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6796
Author(s):  
Zeeshan Ahmed ◽  
Patrick McEvoy ◽  
Max J. Ammann
Keyword(s):  
Threshold Level ◽  
Unit Cell ◽  
Array Antenna ◽  
Wide Bandwidth ◽  
Frequency Scanning ◽  
Compact Size ◽  
The Wire ◽  
Scanning Range

A printed edge-fed counterpart of the wire Bruce array antenna, for frequency scanning applications, is presented in this paper. The unit-cell of the proposed antenna consists of bowtie and semi-circular elements to achieve wide bandwidth from below 22 GHz to above 38 GHz with open-stopband suppression. The open-stopband suppression enables a wide seamless scanning range from backward, through broadside, to forward endfire. A sidelobe threshold level of −10 dB is maintained to evaluate efficient scanning performance of the antenna. The antenna peak realized gain is 15.30 dBi, and, due to its compact size, has the ability to scan from −64° to 76°.

scholarly journals Wide-Angle Scanning Phased Array Antenna using High Gain Pattern Reconfigurable Antenna Elements

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
ByungKuon Ahn ◽  
In-June Hwang ◽  
Kwang-Seok Kim ◽  
Soo-Chang Chae ◽  
Jong-Won Yu ◽  
...  
Keyword(s):  
Phased Array ◽  
High Gain ◽  
Array Antenna ◽  
Reconfigurable Antenna ◽  
Wide Angle ◽  
Phased Array Antenna ◽  
Design Guideline ◽  
Phased Array Antennas ◽  
Array Antennas ◽  
Scanning Range

AbstractThis paper presents a wide-angle scanning phased array antenna using high gain pattern reconfigurable antenna (PRA) elements. Using PRA elements is an attractive solution for wide-angle scanning phased array antennas because the scanning range can be divided into several subspaces. To achieve the desired scanning performance, some characteristics of the PRA element such as the number of switching modes, tilt angle, and maximum half-power beamwidth (HPBW) are required. We analyzed the required characteristics of the PRA element according to the target scanning range and element spacing, and presented a PRA element design guideline for phased array antennas. In accordance with the guideline, the scanning range was set as ±70° and a high gain PRA element with three reconfigurable patterns was used to compose an 8x1 array antenna with 0.9 λ0 spacing. After analyzing whether the active element patterns meet the guideline, the array antenna was fabricated and measured to demonstrate the scanning performance. The fabricated array can scan its beam from -70° to 70° by dividing the scanning range into three subspaces. It shows that even if the array antenna has large element spacing, the desired scanning performance can be obtained using the elements designed under the guideline.

Optimal frequency scanning range for parameters extraction from Brillouin scattering spectrum

Optik ◽  
2018 ◽  
Vol 158 ◽  
pp. 1380-1393 ◽  
Author(s):  
Zhi-niu Xu ◽  
Zhi-wei Hu ◽  
Li-juan Zhao ◽  
Yong-qian Li
Keyword(s):  
Brillouin Scattering ◽  
Optimal Frequency ◽  
Frequency Scanning ◽  
Scattering Spectrum ◽  
Parameters Extraction ◽  
Scanning Range

scholarly journals Bandwidth Enhancement and Frequency Scanning Array Antenna Using Novel UWB Filter Integration Technique for OFDM UWB Radar Applications in Wireless Vital Signs Monitoring

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 3155 ◽  
Author(s):  
MuhibUr Rahman ◽  
Mahdi NaghshvarianJahromi ◽  
Seyed Mirjavadi ◽  
Abdel Hamouda
Keyword(s):  
Frequency Band ◽  
Vital Signs ◽  
Array Antenna ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Bandwidth Enhancement ◽  
Beam Array ◽  
Vital Signs Monitoring ◽  
Frequency Scanning ◽  
Band Pass

This paper presents the bandwidth enhancement and frequency scanning for fan beam array antenna utilizing novel technique of band-pass filter integration for wireless vital signs monitoring and vehicle navigation sensors. First, a fan beam array antenna comprising of a grounded coplanar waveguide (GCPW) radiating element, CPW fed line, and the grounded reflector is introduced which operate at a frequency band of 3.30 GHz and 3.50 GHz for WiMAX (World-wide Interoperability for Microwave Access) applications. An advantageous beam pattern is generated by the combination of a CPW feed network, non-parasitic grounded reflector, and non-planar GCPW array monopole antenna. Secondly, a miniaturized wide-band bandpass filter is developed using SCSRR (Semi-Complementary Split Ring Resonator) and DGS (Defective Ground Structures) operating at 3–8 GHz frequency band. Finally, the designed filter is integrated within the frequency scanning beam array antenna in a novel way to increase the impedance bandwidth as well as frequency scanning. The new frequency beam array antenna with integrated band-pass filter operate at 2.8 GHz to 6 GHz with a wide frequency scanning from the 50 to 125-degree range.

Ultra wide-angle and broad-band metamaterial absorber based on magneto-electric dipole structure

2021 ◽  
Author(s):  
Ai-xia Wang ◽  
Shaobo Qu ◽  
Jiafu Wang ◽  
Jieqiu Zhang ◽  
Wenjie Wang ◽  
...  
Keyword(s):  
Electric Dipole ◽  
Broad Band ◽  
Metamaterial Absorber ◽  
Wide Angle ◽  
Dipole Structure
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