scholarly journals Planar Array Diagnostic Tool for Millimeter-Wave Wireless Communication Systems

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 383 ◽  
Author(s):  
Oluwole Famoriji ◽  
Zhongxiang Zhang ◽  
Akinwale Fadamiro ◽  
Rabiu Zakariyya ◽  
Fujiang Lin
Keyword(s):  
Compressive Sensing ◽  
Antenna Array ◽  
Radiation Pattern ◽  
Millimeter Wave ◽  
Diagnostic Tool ◽  
Communication Systems ◽  
Noisy Data ◽  
Far Field ◽  
Field Samples ◽  
Planar Array

In this paper, a diagnostic tool or procedure based on Bayesian compressive sensing (BCS) is proposed for identification of failed element(s) which manifest in millimeter-wave planar antenna arrays. With adequate a priori knowledge of the reference antenna array radiation pattern, a diagnostic problem of faulty elements was formulated. Sparse recovery algorithms, including total variation (TV), mixed ℓ 1 / ℓ 2 norm, and minimization of the ℓ 1 , are readily available in the literature, and were used to diagnose the array under test (AUT) from measurement points, consequently providing faster and better diagnostic schemes than the traditional mechanisms, such as the back propagation algorithm, matrix method algorithm, etc. However, these approaches exhibit some drawbacks in terms of effectiveness and reliability in noisy data, and a large number of measurement data points. To overcome these problems, a methodology based on BCS was adapted in this paper. From far-field radiation pattern samples, planar array diagnosis was formulated as a sparse signal recovery problem where BCS was applied to recover the locations of the faults using relevance vector machine (RVM). The resulted BCS approach was validated through simulations and experiments to provide suitable guidelines for users, as well as insight into the features and potential of the proposed procedure. A Ka-band ( 28.9   GHz ) 10 × 10 rectangular microstrip patch antenna array that emulates failure with zero excitation was designed for far-field measurements in an anechoic chamber. Both simulated and measured far-field samples were used to test the proposed approach. The proposed technique is demonstrated to detect diagnostic problems with fewer measurements provided the prior knowledge of the array radiation pattern is known, and the number of faults is relatively smaller than the array size. The effectiveness and reliability of the technique is verified experimentally and via simulation. In addition to a faster diagnosis and better reconstruction accuracy, the BCS-based technique shows more robustness to additive noisy data compared to other compressive sensing methods. The proposed procedure can be applied to next-generation transceivers, aerospace systems, radar systems, and other communication systems.

scholarly journals Faulty antenna detection in a linear array using simulated annealing optimization

2020 ◽  
Vol 19 (3) ◽  
pp. 1340
Author(s):  
Navaamsini Boopalan ◽  
Agileswari K. Ramasamy ◽  
Farrukh Hafiz Nagi
Keyword(s):  
Simulated Annealing ◽  
Radiation Pattern ◽  
Antenna Arrays ◽  
Communication Systems ◽  
Linear Array ◽  
Near Field ◽  
Optimization Method ◽  
Random Permutation ◽  
Far Field ◽  
Planar Array

<span lang="EN-US">Sonar, radar and communication systems solely depend on antenna arrays for signal attainment. These arrays are capable of producing directional signals which can be steered in a certain direction. Faulty elements in an array will result in distorted radiation pattern with increased sidelobe levels.  Far-field faulty antenna detection is necessary due to the near field repairing at complex systems like spacecraft. This paper proposes simulated annealing (SA) optimizing method to find the faulty element’s location in a linear array. In this study, a Chebyshev array is presented with the SA optimization method to detect faulty element location with a random permutation of failure locations tested. This method can successfully detect faulty antenna in a linear array. Even though, this method is developed for linear array it can easily be adapted to a planar array.</span>

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

Electronics ◽  
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.

scholarly journals Miniature Dual-Band Substrate Integrated Waveguide Slotted Antenna Array for Millimeter-Wave 5G Applications

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Fei-Peng Lai ◽  
Lu-Wu Chang ◽  
Yen-Sheng Chen
Keyword(s):  
Antenna Array ◽  
Millimeter Wave ◽  
Communication Systems ◽  
Single Layer ◽  
High Gain ◽  
Dual Band ◽  
Substrate Integrated Waveguide ◽  
Suitable Candidate ◽  
Fifth Generation ◽  
Half Power

A compact substrate integrated waveguide (SIW) antenna array that operates at 28 GHz and 38 GHz is proposed for fifth generation (5G) applications. The proposed array consists of four SIW cavities fabricated on one single layer of substrate. Each cavity implements a rhombic slot and a triangular-split-ring slot, resonating on TE101 and TE102 modes at 28 GHz and 38 GHz, respectively. In comparison with dual-band SIW antennas in the literature, the proposed configuration depicts a miniature footprint (28.7 × 30.8 mm2) without stacking substrates. To excite the four cavities with equal power, a broadband power divider that supports the propagation of TE10 mode is designed. Accordingly, the impedance bandwidths are 26.6–28.3 GHz and 36.8–38.9 GHz. The measured realized peak gain over the lower and higher bands is 9.3–10.9 dBi and 8.7–12.1 dBi, respectively. The measured half-power beam widths (HPBWs) at 28 GHz and 38 GHz are 20.7° and 15.0°, respectively. Considering these characteristics, including dual bands, high gain, narrow beam widths, miniaturization, and single layer, the proposed antenna array is a suitable candidate for millimeter-wave 5G communication systems with the flexibility in switching operating frequency bands against channel quality variations.

scholarly journals Compressive Sensing for Millimeter Wave Antenna Array Diagnosis

2018 ◽  
Vol 66 (6) ◽  
pp. 2708-2721 ◽  
Author(s):  
Mohammed E. Eltayeb ◽  
Tareq Y. Al-Naffouri ◽  
Robert W. Heath
Keyword(s):  
Compressive Sensing ◽  
Antenna Array ◽  
Millimeter Wave ◽  
Wave Antenna ◽  
Millimeter Wave Antenna

scholarly journals THE OUTDOOR PLANAR ANTENNA ARRAY BOOSTER MOBILE INTERNET 3G/4G

T-Comm ◽  
2021 ◽  
Vol 15 (5) ◽  
pp. 22-28
Author(s):  
Timur A. Gainutdinov ◽  
◽  
Vadim G. Kocherzhewskiy ◽  
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Communication Systems ◽  
Window Glass ◽  
Base Station ◽  
Mobile Internet ◽  
Planar Antenna ◽  
Radio Access ◽  
Planar Array ◽  
The Individual

Internet antennas-busters are one of the most common antennas of suburban subscriber stations of broadband radio access systems. In many ways, the speed of information transmission in such systems limits the signal level provided by the base station in the entire operating band of the Internet signal. Since the antenna located on the wall of the house is stationary, it can be made relatively large, which allows you to implement a higher gain and accordingly increase the signal level on the router. At the same time, the market for such antennas is quite saturated with a wide variety of antenna designs, but due to the increase in the number of people working in remote mode and the expected transition to mobile communication systems 5G, it still continues to develop rapidly. The paper proposes a new design of the transceiver mobile Internet antenna-buster, whose main advantage is absolute imperceptibility when installed outdoors. We consider a planar in-phase 8-element antenna array installed on the window glass of a suburban building. As the individual emitters of the lattice are encouraged to use a planar wave dipoles. A feeding scheme for the antenna array on flat two-wire lines has been developed, which provides in-phase and almost equal amplitude excitation of all array elements of the array. Calculations of antenna radiation patterns in the range of 1700-2700 MHz are given. It is shown that the developed antenna has a gain of 8-9 dB in the range of 1700-2100 MHz and 10-12 dB in the range of 2400-2700 MHz. These values are practically not inferior to similar indicators of known collinear antenna arrays and in the upper part of the work range, they have a gain of 1-2 dB compared to their analogs. A planar array matching scheme has been developed that provides a VSWR of about 2.5 in the range of 1700-2100 MHz and no worse than 2 in the range of 2400-2700 MHz. Variants of constructing planar antenna arrays with broadband emitters that provide similar matching without the use of additional matching devices are presented.

scholarly journals Experimental demonstration of peripherally-excited antenna arrays

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ayman H. Dorrah ◽  
George V. Eleftheriades
Keyword(s):  
Antenna Array ◽  
Millimeter Wave ◽  
Antenna Arrays ◽  
Autonomous Vehicles ◽  
Communication Systems ◽  
Phased Arrays ◽  
Active Element ◽  
Practical Implementation ◽  
Experimental Demonstration ◽  
Automotive Radars

AbstractEmerging technologies such as 5G communication systems, autonomous vehicles and satellite Internet have led to a renewed interest in 2D antennas that are capable of generating fixed/scannable pencil beams. Although traditional active phased arrays are technologically suitable for these applications, there are cases where other alternatives are more attractive, especially if they are simpler and less costly to design and fabricate. Recently, the concept of the Peripherally-Excited (PEX) antenna array has been proposed, promising a sizable reduction in the active-element count, especially when compared with traditional phased arrays. Albeit at the price of exhibiting some constraints on the possible beam-pointing directions. Here, we demonstrate the first practical implementation of the PEX antenna concept, and the proposed design is capable of generating single or multiple independently scannable pencil beams at broadside and tilted radiation directions, from a shared radiating aperture. The proposed structure is also easily scalable to higher millimeter-wave frequencies, and can be particularly useful in MIMO and duplex antenna applications, commonly encountered in automotive radars, among others.

Sign in / Sign up

Export Citation Format

Share Document