A New High-Gain Microstrip Yagi Array Antenna With a High Front-to-Back (F/B) Ratio for WLAN and Millimeter-Wave Applications

2007 ◽  
Vol 55 (2) ◽  
pp. 298-304 ◽  
Author(s):  
Gerald R. DeJean ◽  
Manos M. Tentzeris
Keyword(s):  
Millimeter Wave ◽  
High Gain ◽  
Array Antenna

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

Millimeter-wave beam-steering high gain array antenna by utilizing metamaterial zeroth-order resonance elements and Fabry-Perot technique

2018 ◽  
Vol 10 (3) ◽  
pp. 376-382 ◽  
Author(s):  
Asghar Bakhtiari ◽  
Ramezan Ali Sadeghzadeh ◽  
Mohammad Naser-Moghaddasi
Keyword(s):  
Millimeter Wave ◽  
Wave Beam ◽  
Beam Steering ◽  
High Gain ◽  
Array Antenna ◽  
Antenna Element ◽  
Zeroth Order ◽  
Order Resonance ◽  
Fabry Perot ◽  
Feed Network

Millimeter-wave (mm-wave) beam-steering antennas are preferred for reducing the disruptive effects, such as those caused by high atmospheric debilitation in wireless communications systems. In this work, a compact broadband antenna array with a low loss feed network design is introduced. To overcome the short-range effects on mm-wave frequencies, a feed network – with a modified Butler matrix and a compact zeroth-order resonance antenna element – has been designed. Furthermore, the aperture feed technique has been utilized to provide a broadside stable pattern and improve the delivered gain. A Fabry-Perot layer without the height of the air layer is used. Taking advantage of this novel design, a broadband and compact beam-steering array antenna – capable of covering impedance bandwidths (from 33.84 to 36.59 GHz) and scanning a solid angle of about ~94°, with a peak gain of 17.6 dBi – is attained.

A compact high gain wideband millimeter wave 1 × 2 array antenna for 26/28 GHz 5G applications

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yousra Ghazaoui ◽  
Mohammed EL Ghzaoui ◽  
Sudipta Das ◽  
BTP Madhav ◽  
Ali el Alami
Keyword(s):  
Millimeter Wave ◽  
Design Methodology ◽  
High Gain ◽  
Array Antenna ◽  
Power Divider ◽  
Wave Band ◽  
Wide Bandwidth ◽  
Antenna Structure ◽  
Content Type ◽  
Compact Size

Purpose This paper aims to present the design, fabrication and analysis of a wideband, enhanced gain 1 × 2 patch antenna array with a simple profile structure to meet the desired antenna traits, such as wide bandwidth, high gain and directional patterns expected for the upcoming fifth-generation (5G) wireless applications in the millimeter wave band. To enhance these parameters (bandwidth and gain), a new antenna geometry by using a T-junction power divider is presented. Design/methodology/approach The theory behind this paper is connected with advancements in the 5G communications related to antennas. The methodology used in this work is to design a high gain array antenna and to identify the best possible power divider to deliver the power in an optimized way. The design methodology adopts several steps like the selection of proper substrate material as per the design specification, size of the antenna as per the frequency of operation and application-specific environment condition. The simulation has been performed on the designed antenna in the electromagnetic simulation tool (high-frequency structure simulator [HFSS]), and optimization has been done with parametric analysis, and then the final array antenna model is proposed. The proposed array contains 2-patch elements excited by one port adapted to 50 Ω through a T-junction power divider. The 1 × 2 array configuration with the suggested geometry helps to improve the overall gain of the antenna, and the implementation of the T-junction power divider provides enhanced bandwidth. The proposed array designed using a 1.6 mm thick flame retardant substrate occupies a compact area of 14 × 12.14 mm2. Findings The prototype of the array antenna is fabricated and measured to validate the design concept. A good agreement has been reached between the measured and simulated antenna parameters. The measured results confirm its wideband and high gain characteristics, covering 24.77–28.80 GHz for S11= –10 dB with a peak gain of about 15.16 dB at 27.65 GHz. Originality/value The proposed antenna covers the bandwidth requirements of the 26 GHz n258 band (24.25–27.50 GHz) to be deployed in the UK and Europe. The suggested antenna structure also covers the federal communications commission (FCC)-regulated 28 GHz n261 band (27.5–28.35 GHz) to be deployed in America and Canada. The low profile, compact size, simple structure, wide bandwidth, high gain and desired directional radiation patterns confirm the applicability of the suggested array antenna for the upcoming 5 G wireless systems.

Broadband high‐gain slot grid array antenna for millimeter wave applications

2020 ◽  
Vol 31 (1) ◽  
Author(s):  
Xiong‐Min Hu ◽  
Sai‐Wai Wong ◽  
Yin Li ◽  
Jing‐Yu Lin ◽  
Yang Yang ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
High Gain ◽  
Array Antenna

scholarly journals Wideband Slot Array Antenna Fed by Gap Waveguide with Right-Handed Circular Polarization and High Gain

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Pejman Mahmoudi Kanesbi ◽  
Nasrin Amiri
Keyword(s):  
Circular Polarization ◽  
Millimeter Wave ◽  
Axial Ratio ◽  
High Gain ◽  
Array Antenna ◽  
Impedance Bandwidth ◽  
Frequency Range ◽  
Circularly Polarized ◽  
Metal Layers ◽  
Final Array

A wideband and high-gain circularly polarized (CP) 16 × 16 array antenna based on gap waveguide technology is presented for millimeter-wave applications at 28 GHz frequency range. Four cavity-backed slots with linear polarized (LP) radiation are used as the subarray. CP is obtained by a 4 × 4 sequential feeding network which is also expanded to achieve high gain. The feeding network of the final array antenna consists of two layers based on the ridge gap waveguide (RGW), and it has four unconnected metal layers. It is shown by simulation that the proposed antenna has 20.5% impedance bandwidth over 25.8–31.7 GHz and 3 dB axial ratio bandwidth near 10% over 27.2–30 GHz. In addition, the maximum gain value for this antenna is 31.6 dBi at a frequency of 29 GHz, which shows good performance compared to other structures.

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