Antenna element design for a conformal antenna array demonstrator

The characteristics of a novel antipodal Vivaldi antenna array mounted on a dielectric cone are presented. By employing antipodal Vivaldi antenna element, the antenna array shows ultrawide bandwidth and end-fire radiation characteristics. Our simulations show that the cone curvature has an obvious influence on the performance of the conformal antenna, in terms of both the bandwidth and the radiation patterns. The thickness and permittivity of the dielectric cone have an effect on the bandwidth of the conformal antenna. Measurement results of both single antenna and conformal antenna array show a good agreement with the simulated results. The measured conformal antenna can achieve a −10 dBS11with bandwidth of 2.2–12 GHz and demonstrate a typical end-fire radiation beam. These findings provide useful guidelines and insights for the design of wideband end-fire antennas mounted on a dielectric cone.

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Comparative Analysis of Linear and Nonlinear Pattern Synthesis of Hemispherical Antenna Array Using Adaptive Evolutionary Techniques

International Journal of Antennas and Propagation ◽

10.1155/2014/987140 ◽

2014 ◽

Vol 2014 ◽

pp. 1-10 ◽

Cited By ~ 3

Author(s):

K. R. Subhashini ◽

A. T. Praveen Kumar

Keyword(s):

Antenna Array ◽

Antenna Arrays ◽

High Performance ◽

Angular Position ◽

Excitation Amplitude ◽

Antenna Element ◽

Pattern Synthesis ◽

Conformal Antenna ◽

Linear And Nonlinear ◽

Nonlinear Pattern

Hemispherical antenna arrays are subjected to linear and nonlinear synthesis and are optimized using adaptive based differential evolution (ADE) and fire fly (AFA) algorithm. The hemispherical shaped array with isotropic elements is considered. Antenna element parameters that are used for synthesis are excitation amplitude and angular position. Linear synthesis is termed as the variation in the element excitation amplitude and nonlinear synthesis is process of variation in element angular position. Both ADE and AFA are a high-performance stochastic evolutionary algorithm used to solveN-dimensional problems. These methods are used to determine a set of parameters of antenna elements that provide the desired radiation pattern. The effectiveness of the algorithms for the design of conformal antenna array is shown by means of numerical results. Comparison with other methods is made whenever possible. The results reveal that nonlinear synthesis, aided by the discussed techniques, provides considerable enhancements compared to linear synthesis.

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High Gain Beam Steering Antenna Arrays with Low Scan Loss for mmWave Applications

Defence Science Journal ◽

10.14429/dsj.72.17318 ◽

2022 ◽

Vol 72 (1) ◽

pp. 67-72

Author(s):

Anil Kumar Yerrola ◽

Maifuz Ali ◽

Ravi Kumar Arya ◽

Lakhindar Murmu ◽

Ashwani Kumar

Keyword(s):

Antenna Array ◽

Antenna Arrays ◽

Patch Antenna ◽

Beam Steering ◽

High Gain ◽

Microstrip Patch Antenna ◽

Antenna Element ◽

Array Design ◽

Conformal Antenna ◽

Microstrip Patch

In millimeter-wave (mmWave) communications, the antenna gain is a crucial parameter to overcome path loss and atmospheric attenuation. This work presents the design of two cylindrical conformal antenna arrays, made of modified rectangular microstrip patch antenna as a radiating element, working at 28 GHz for mmWave applications providing high gain and beam steering capability. The microstrip patch antenna element uses Rogers RO4232 substrate with a thickness of 0.5 mm and surface area of 5.8 mm × 5.8 mm. The individual antenna element provides a gain of 6.9 dBi with return loss bandwidth of 5.12 GHz. The first antenna array, made by using five conformal antenna elements, achieves a uniform gain of approximately 12 dBi with minimal scan loss for extensive scan angles. In the second antenna array, a dielectric superstrate using Rogers TMM (10i) was used to modify the first antenna array. It enhanced the gain to approximately 16 dBi while still maintaining low scan loss for wide angles. The proposed array design method is very robust and can be applied to any conformal surface. The mathematical equations are also provided to derive the array design, and both array designs are verified by using full-wave simulations.

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A Graphene-Assembled Film Based MIMO Antenna Array with High Isolation for 5G Wireless Communication

Applied Sciences ◽

10.3390/app11052382 ◽

2021 ◽

Vol 11 (5) ◽

pp. 2382

Author(s):

Rongguo Song ◽

Xiaoxiao Chen ◽

Shaoqiu Jiang ◽

Zelong Hu ◽

Tianye Liu ◽

...

Keyword(s):

Antenna Array ◽

Antenna Arrays ◽

Multiple Input Multiple Output ◽

Frequency Selective Surface ◽

Antenna System ◽

Antenna Element ◽

Mimo Antenna ◽

High Isolation ◽

Input Multiple Output ◽

Alternative Material

With the development of 5G, Internet of Things, and smart home technologies, miniaturized and compact multi-antenna systems and multiple-input multiple-output (MIMO) antenna arrays have attracted increasing attention. Reducing the coupling between antenna elements is essential to improving the performance of such MIMO antenna system. In this work, we proposed a graphene-assembled, as an alternative material rather than metal, film-based MIMO antenna array with high isolation for 5G application. The isolation of the antenna element is improved by a graphene assembly film (GAF) frequency selective surface and isolation strip. It is shown that the GAF antenna element operated at 3.5 GHz has the realized gain of 2.87 dBi. The addition of the decoupling structure improves the isolation of the MIMO antenna array to more than 10 dB and corrects the antenna radiation pattern and operating frequency. The isolation between antenna elements with an interval of 0.4λ is above 25 dB. All experimental results show that the GAF antenna and decoupling structure are efficient devices for 5G mobile communication.

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Triangular Slot-Loaded Wideband Planar Rectangular Antenna Array for Millimeter-Wave 5G Applications

Electronics ◽

10.3390/electronics10070778 ◽

2021 ◽

Vol 10 (7) ◽

pp. 778

Author(s):

Iftikhar Ahmad ◽

Houjun Sun ◽

Umair Rafique ◽

Zhang Yi

Keyword(s):

Antenna Array ◽

Millimeter Wave ◽

Communication Systems ◽

Ground Plane ◽

Simulated Data ◽

Impedance Bandwidth ◽

Antenna Element ◽

Single Antenna ◽

Rectangular Patch ◽

Half Power

This paper presents a design of a triangular slot-loaded planar rectangular antenna array for wideband millimeter-wave (mm-wave) 5G communication systems. The proposed array realizes an overall size of 35.5 × 14.85 mm2. To excite the array elements, a four-way broadband corporate feeding network was designed and analyzed. The proposed array offered a measured impedance bandwidth in two different frequency ranges, i.e., from 23 to 24.6 GHz and from 26 to 45 GHz. The single-antenna element of the array consists of a rectangular patch radiator with a triangular slot. The partial ground plane was used at the bottom side of the substrate to obtain a wide impedance bandwidth. The peak gain in the proposed array is ≈12 dBi with a radiation efficiency of >90%. Furthermore, the array gives a half-power beamwidth (HPBW) of as low as 12.5°. The proposed array has been fabricated and measured, and it has been observed that the measured results are in agreement with the simulated data.

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Research on the Conformal Phased-Array Antenna

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.685.324 ◽

2014 ◽

Vol 685 ◽

pp. 324-327

Author(s):

Shuang Zhao ◽

Yu Bo Yue

Keyword(s):

Mathematical Model ◽

Antenna Array ◽

Phased Array ◽

Design Method ◽

Array Antenna ◽

Phased Array Antenna ◽

Conformal Antenna ◽

Conformal Array ◽

Design Requirements ◽

The Mathematical Model

The mathematical model of conformal antenna array is the premise and basis of the conformal array antenna signal processing. Based on the analysis of the antenna array, a design method for adjusting the direction of the conformal array antenna is proposed. Through simulation, the pattern of antenna meets the actual needs of the project and it reaches pre design requirements.

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