scholarly journals Beam‐steering high‐gain array antenna with FP Bow‐tie slot antenna element for pattern stabilisation

2020 ◽  
Vol 14 (11) ◽  
pp. 1185-1189
Author(s):  
Vahid Rafiei ◽  
Ghader Sharifi ◽  
Saeid Karamzadeh ◽  
Mesut Kartal
Keyword(s):  
Beam Steering ◽  
High Gain ◽  
Array Antenna ◽  
Slot Antenna ◽  
Antenna Element ◽  
Bow Tie

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.

Simultaneous beam steering of multiple signals based on optical wavelength-selective switch

2015 ◽  
Vol 7 (3-4) ◽  
pp. 391-398
Author(s):  
Giovanni Serafino ◽  
Antonio Malacarne ◽  
Claudio Porzi ◽  
Paolo Ghelfi ◽  
Marco Presi ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Integrated Circuit ◽  
Phase Shifter ◽  
Phased Array ◽  
Beam Steering ◽  
Array Antenna ◽  
Ring Resonators ◽  
Antenna Element ◽  
Phased Array Antenna ◽  
Wavelength Selective Switch

A novel, photonics-based scheme for the independent and simultaneous beam steering of multiple radio frequency signals at a wideband phased-array antenna is presented. As a proof of concept, a wavelength-selective switch (WSS) is employed both as a wavelength router to feed multiple antenna elements and as a tunable phase shifter to independently control the phase of each signal at any antenna element. In the experiment, two signals at 12.5 and 37.5 GHz are simultaneously fed to the four output ports of the WSS with independent and tunable phase shifts, emulating the independent steering of two signals in a four-element phased-array antenna. The results confirm the precision and flexibility of the proposed scheme, which can be realized both with bulk components or resorting to photonic integrated circuits, especially for wide-band applications. The architecture for a possible integrated implementation of the proposed solution is presented, employing a structure based on micro-ring resonator. Starting from these results, the feasibility of an integrated version of the presented architecture is also considered. The proposed photonic integrated circuit realizing the beam-forming network might be based on tunable true-time delay, as well as on phase shift through micro-ring resonators, and could be conveniently implemented with CMOS-compatible silicon technology.

LTCC slot array antenna for 5G application

2019 ◽  
Vol 2019 (1) ◽  
pp. 000238-000242
Author(s):  
Hiroyuki Takahashi ◽  
Satoshi Hirano ◽  
Daisuke Yamashita
Keyword(s):  
Mobile Device ◽  
Beam Steering ◽  
Base Station ◽  
Small Cell ◽  
Array Antenna ◽  
Antenna Element ◽  
Beam Angle ◽  
Antenna Size ◽  
Antenna Module ◽  
Cell Base

Abstract We develop the antenna module substrate which is broadband and large gain using an LTCC technology in a 28GHz band in this study. We used LTCC materials (dielectric constant 5.8, Dielectric loss 0.002@28GHz) which we developed for materials originally. First of all, we confirmed ability of slot array antenna made by LTCC for 5G application to get broadband property. The structure of designed array antenna became 40mm × 3.2mm × t1.6mm. We confirmed that this antenna has wider bandwidth (2.2GHz) and higher gain (6dBi). But this antenna size is too large for applying mobile device. Therefore we redesigned to reduce antenna size without specification degradation. The structure of redesigned antenna element becomes basically 4.8mm × 6.7mm × t1.0mm. This antenna has wider bandwidth (2.7GHz). The gains are more than 5dBi for the characteristic of this element in a band. Assume this antenna a fabric; 2 × 2 (4 elements: for mobile device) and 4 × 4 (16 elements: for small cell base station) we make an array antenna for Small cell base station and for mobile device. We will evaluate a beam steering examination with emission properties (gain, beam angle).

Design of ultra-wide tetra band phased array inverted T-shaped patch antennas using DGS with beam-steering capabilities for 5G applications

2020 ◽  
Vol 12 (5) ◽  
pp. 419-430
Author(s):  
Muhammad Anas ◽  
Hifsa Shahid ◽  
Abdul Rauf ◽  
Abdullah Shahid
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
High Gain ◽  
Ultra Wideband ◽  
Main Beam ◽  
Antenna Element ◽  
Patch Antennas ◽  
Defected Ground Structure ◽  
Phased Array Antenna ◽  
Millimeter Wave Antenna

AbstractA novel 1 × 4 phased array elliptical inverted T-shaped slotted sectored patch antenna with defected ground structure (DGS), resonate at proposed ultra-wide tetra band at 28, 43, 51, and 64 GHz with high gain and beam-steering capabilities is presented. An inverted T-shaped slotted stub is used with the sectored patch to achieve ultra-wideband properties. In order to resonate the antenna at four different bands, DGS of round bracket slot is etched on the ground. The 1 × 4 phased arrays are used at the top edge and bottom edge of mobile PCB with high gain. The simulation results show that the antenna has four ultra-wide bands: 25.8–29.7, 40.6–44.6, 49.2–53.1, and 62.2–74 GHz with a maximum gain of 16.5 dBi at 51 GHz. The phased array antenna is capable to steer its main beam within ±30° at the 26, 28, and 43 GHz, using appropriate phase shifts of each antenna element. The proposed millimeter wave antenna is particularly suitable for cellular infrastructures and can be a candidate for emerging 5G mobile applications. The availability of an additional 11.8 GHz (62.2–74 GHz) of contiguous unlicensed spectrum will allow the launching of new exciting wireless services.

scholarly journals Quasi-Yagi Slotted Array Antenna with Fan-Beam Characteristics for 28 GHz 5G Mobile Terminals

2020 ◽  
Vol 10 (21) ◽  
pp. 7686
Author(s):  
Sungpeel Kim ◽  
Jaehoon Choi
Keyword(s):  
Mutual Coupling ◽  
Beam Steering ◽  
Ground Plane ◽  
Array Antenna ◽  
Slot Antenna ◽  
Mobile Terminals ◽  
Beam Radiation ◽  
Steering Mechanism ◽  
Half Power ◽  
Beam Characteristics

A quasi-Yagi slotted array antenna with fan-beam characteristics is proposed for 28 GHz 5G mobile terminals. The antenna is composed of a 1 × 8 slot antenna array with directors to enhance the half-power beamwidth (HPBW). The proposed antenna has a fan-beam radiation pattern with a simulated HPBW of 256.72° and a peak gain of 11.16 dBi. In addition, the proposed antenna covers ±48° using a beam steering mechanism. Mutual coupling reduction is achieved by inserting slits between the adjacent slot radiators on the ground plane. The simulated −10 dB reflection coefficient bandwidth of the proposed antenna is 1.79 GHz (27.03–28.82 GHz), and the mutual coupling between each of the slot radiators is lower than −25.02 dB over the 28 GHz target band (27.5–28.35 GHz). To investigate the effect of a human body in a practical environment, the power density was considered to estimate the electromagnetic exposure with a simplified skin model. The measured results were in good agreement with the simulated ones and demonstrated that the proposed antenna could be used for 5G mobile terminals.

scholarly journals Design of Wideband Slot Antenna Array with Stereoscopic Differentially Fed Structures

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Guang Sun ◽  
Ge Gao ◽  
Tingting Liu ◽  
Yi Liu ◽  
Hu Yang
Keyword(s):  
Antenna Array ◽  
High Gain ◽  
Radar System ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Radiation Characteristics ◽  
Wide Bandwidth ◽  
Feeding Structure

In this paper, a wideband slot antenna element and its array with stereoscopic differentially fed structures are proposed for the radar system. Firstly, a series of slots and a stereoscopic differentially fed structure are designed for the antenna element, which makes it possess a wide bandwidth, stable radiation characteristics, and rather high gain. Moreover, the stereoscopic feeding structure can firmly support the antenna’s radiation structure and reduce the influence of feeding connectors on radiating performance. Secondly, a 4 × 4 array is designed using the proposed antenna element. And a hierarchical feeding network is designed for the array on the basis of the stereoscopic differentially fed structure. For validation, the antenna element and 4 × 4 array are both fabricated and measured: (1) the measured −10 dB impedance bandwidth of the antenna element is 62% (6.8–12.9 GHz) and the gain within the entire band is 5–9.7 dBi and (2) the measured −10 dB impedance bandwidth of the array is approximately 50% (7 to 12 GHz) with its gain being 14–19.75 dBi within the entire band. Notably, measured results agree well with simulations and show great advantages over other similar antennas on bandwidth and gain.

scholarly journals 3D Printed High Gain Complementary Dipole/Slot Antenna Array

2018 ◽  
Vol 8 (8) ◽  
pp. 1410 ◽  
Author(s):  
Kwok So ◽  
Kwai Luk ◽  
Chi Chan ◽  
Ka Chan
Keyword(s):  
Antenna Array ◽  
High Gain ◽  
Dipole Antenna ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Frequency Range ◽  
Operating Frequency Range ◽  
3D Printed ◽  
Stable Frequency

By employing the complementary dipole antenna concept to the normal waveguide fed slot radiator, an improved antenna element with wide impedance bandwidth and symmetrical radiation patterns is developed. This is achieved by mounting two additional metallic cuboids on the top of the slot radiator, which is equivalent to adding an electric dipole on top of the magnetic dipole due to the slot radiator. Then, a high-gain antenna array was designed based on the improved element and fabricated, using 3D printing technology, with stable frequency characteristics operated at around 28 GHz. This was followed by metallization via electroplating. Analytical results agree well with the experimental results. The measured operating frequency range for the reflection coefficient ≤−15 dB is from 25.7 GHz to 29.8 GHz; its corresponding fractional impedance bandwidth is 14.8%. The measured gain is approximately 32 dBi, with the 3 dB beamwidth around 4°.

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