scholarly journals Millimeter-Wave Metal Reflectarray Antennas with Sub-Wavelength Holes

Electronics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 945
Author(s):  
Minwoo Yi ◽  
Youngseok Bae ◽  
Sungjun Yoo
Keyword(s):  
Millimeter Wave ◽  
Wide Band ◽  
High Gain ◽  
Metal Plate ◽  
Wave Band ◽  
Millimeter Wave Band ◽  
Reflectarray Antenna ◽  
Sub Wavelength

Reflectarray antennas composed of rectangular grooves with sub-wavelength holes on a metal plate are designed for millimeter-wave regions. All depths of multiple grooves in the metal reflectarray are elaborately manipulated for a high-gain reflector. A sub-wavelength hole in each groove reduces the mass of the reflectarray antenna, which rarely affects the re-radiated millimeter-wave filed from the groove. In this paper, we have demonstrated light high-gain reflectarray antennas and achieved a 25%-light reflectarray antenna compared with a metal reflectarray without sub-wavelength holes. The designed reflectarray antenna operates within the 15% wide-band bandwidth at 3 dB for millimeter-wave band.

scholarly journals High-Gain Millimeter-Wave Patch Array Antenna for Unmanned Aerial Vehicle Application

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3914
Author(s):  
Kyei Anim ◽  
Jung-Nam Lee ◽  
Young-Bae Jung
Keyword(s):  
Surface Wave ◽  
Millimeter Wave ◽  
Large Scale ◽  
High Gain ◽  
Metal Plate ◽  
Array Antenna ◽  
Wave Radiation ◽  
Wave Band ◽  
Large Patch ◽  
Large Coupling

A high-gain millimeter-wave patch array antenna is presented for unmanned aerial vehicles (UAVs). For the large-scale patch array antenna, microstrip lines and higher-mode surface wave radiations contribute enormously to the antenna loss, especially at the millimeter-wave band. Here, the element of a large patch array antenna is implemented with a substrate integrated waveguide (SIW) cavity-backed patch fed by the aperture-coupled feeding (ACF) structure. However, in this case, a large coupling aperture is used to create strongly bound waves, which maximizes the coupling level between the patch and the feedline. This approach helps to improve antenna gain, but at the same time leads to a significant level of back radiation due to the microstrip feedline and unwanted surface-wave radiation, especially for the large patch arrays. Using the SIW cavity-backed patch and stripline feedline of the ACF in the element design, therefore, provides a solution to this problem. Thus, a full-corporate feed 32 × 32 array antenna achieves realized gain of 30.71–32.8 dBi with radiation efficiency above 52% within the operational band of 25.43–26.91 GHz. The fabricated antenna also retains being lightweight, which is desirable for UAVs, because it has no metal plate at the backside to support the antenna.

A High Gain Circularly Polarized Microstrip Array Antenna At Millimeter-Wave Band

2021 ◽  
Author(s):  
Youjian Hu ◽  
Qingwen Deng ◽  
Xiaojun Ying ◽  
Siyi Shen ◽  
Yuming Zeng ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
High Gain ◽  
Array Antenna ◽  
Wave Band ◽  
Circularly Polarized ◽  
Millimeter Wave Band ◽  
Microstrip Array ◽  
Microstrip Array Antenna

scholarly journals Design and Optimization of a High Gain Multiband Patch Antenna for Millimeter Wave Application

2018 ◽  
Vol 8 (5) ◽  
pp. 2942
Author(s):  
A. Zaidi ◽  
A. Baghdad ◽  
A. Ballouk ◽  
A. Badri
Keyword(s):  
Millimeter Wave ◽  
Patch Antenna ◽  
Ground Plane ◽  
High Gain ◽  
Wave Band ◽  
Resonant Frequencies ◽  
Design And Optimization ◽  
High Frequency Structure Simulator ◽  
Microstrip Patch ◽  
Millimeter Wave Band

<p>This paper presents an enhanced Quadri-band microstrip patch antenna, using defective slots in the ground plane, designed to operate in the millimeter wave band, formulated using cavity model and simulated by an EM-simulator, based on finite element method: HFSSv15 (High Frequency Structure Simulator). The proposed antenna incorporates two symmetric patterns of “U” shaped slots with an “I” shaped slot engraved in the middle of the ground plane. The resulting antenna has four frequency bands; the first resonant frequency is located in the Ka band, at about 27Ghz, the second at nearly 35Ghz, the third at 41Ghz and the last one at 51GHz. Those resonant frequencies could be shifted by tuning the slots dimensions introduced if the ground plane of the proposed antenna .</p><p> </p>

Wide-Band Microstrip Patch Antenna for Millimeter Wave-band Applications*

2020 ◽  
Author(s):  
Utkarsh Jain ◽  
Aakash Warke ◽  
Aditi Chauhan ◽  
Manan Gupta ◽  
Ashok Kumar ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Patch Antenna ◽  
Wide Band ◽  
Microstrip Patch Antenna ◽  
Wave Band ◽  
Microstrip Patch ◽  
Millimeter Wave Band

LTCC Partially-Filled Post-Wall Rectangular-Waveguide Slot Array Antenna in the Millimeter-Wave Band

2012 ◽  
Vol E95.C (10) ◽  
pp. 1635-1642 ◽  
Author(s):  
Yuanfeng SHE ◽  
Jiro HIROKAWA ◽  
Makoto ANDO ◽  
Daisuke HANATANI ◽  
Masahiro FUJIMOTO
Keyword(s):  
Millimeter Wave ◽  
Rectangular Waveguide ◽  
Array Antenna ◽  
Wave Band ◽  
Waveguide Slot ◽  
Millimeter Wave Band
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