Antenna elements

This paper proposes a dual-band PIFA antenna operated at 28/38 GHz for 5G communication systems. The PIFA antenna consists of two dielectric layers and an air gap is inserted between these two layers. Both substrates, namely Roger RT dielectric, have a relative dielectric constant of 2.2 and a thickness of 0.127 mm.

9p vibego 02-02-2024 1 0   Download

Part 1 of ebook "Antenna engineering handbook" provides readers with contents including: introduction and fundamentals; fundamentals of antennas; arrays of discrete elements; types and design methods; dipoles and monopoles; microstrip antennas; slot-antenna arrays; leaky-wave antennas; long-wire antennas; surface-wave antennas; frequency-independent antennas;...

829p tieulangtran 28-09-2023 7 2   Download

In this paper, we present a configuration of a wideband MIMO antenna array for 5G terminals. The single-element antenna has compact size, dual polarization, wide operating bandwidth covering the 5G N78 frequency band, and high isolation between the two input ports (>40 dB).

8p viwhitewolf 11-07-2023 4 4   Download

This paper introduces a novel high gain and wideband antenna array at 5 GHz for outdoor applications. The proposed array consists of a 2×9 elements planar array and a reflector. This antenna has a gain peak of 15.7 dBi and a bandwidth of 2 GHz from 4.0 GHz to 6.0 GHz.

6p videadpool 05-05-2023 7 3   Download

This thesis presents a study of impedance optimisation of active microstrip patch antennas to multiple frequency points. A single layered aperture coupled microstrip patch antenna has been optimised to match the source reflection coefficient of a transistor in designing an active antenna. The active aperture coupled microstrip patch antenna was optimised to satisfy Global Positioning System (GPS) frequency specifications.

137p runthenight05 01-03-2023 6 2   Download

This paper proposes a lefthanded circularly polarized (LHCP) 2×4 array antenna using sequential phase rotation power dividers at 5.8 GHz band. The element antenna is a square patch antenna with a slit in the middle for better impedance matching, six trapezoidal parasitic patches added to either side of the main patch to create resonance at high frequencies, and a metasurface placed on top of the main patch.

11p viargus 20-02-2023 3 3   Download

The possibility of using Latin squares for constructing two-dimensional nonequidistant antenna arrays that can be used for development of radio telescopes and systems for remote sensing of atmospheric and lithospheric radiation has been shown. An algorithm for calculating the coordinates of elements of a non-equidistant antenna array using the values of elements of Latin squares is proposed.

7p vipagani 24-10-2022 5 3   Download

The paper proposed an antenna array consisting of four bow-shaped dipole elements. The antenna array operates at a center frequency of 5 GHz with a bandwidth of 332 MHz. By utilizing the reflector and the directors, the antenna obtains a high gain of 10.6 dBi at 5 GHz and over 10.3 dBi across the operating bandwidth.

7p viarrinera 26-08-2022 6 4   Download

This paper studies the correlation properties of 5G channel modeling in MIMO system such as auto-correlation functions of time and frequency, as well as the spatial cross-correlation function.

6p vimelindagates 18-07-2022 9 2   Download

In this paper, we introduce a wideband antenna array for RF energy harvesting from 3G/4G and Wi-Fi. The array consists of four parallelly linked wideband antenna elements and a metallic reflector to enhance gain and suppress back lobe radiation.

7p nguaconbaynhay12 13-06-2021 18 3   Download

In this paper, a multiple-input multipleoutput (MIMO) antenna with high isolation is designed using defected ground structure (DGS). The proposed antenna is constructed by two sets of four elements (2 × 2), which are designed at the central frequency of 3.5 GHz for Worldwide Interoperability for Microwave Access (WiMAX) applications. The antenna is fabricated on a FR4 substrate with an overall size of 144 × 99 × 1.6 mm. Thanks to DGS, the designed MIMO antenna achieves a high isolation of 30 dB and a high radiation efficiency of over 90%. Besides, this MIMO antenna attains a 7.5 dBi gain.

7p nguaconbaynhay10 22-01-2021 17 1   Download

. In this paper, a three-phase state element for electronically reconfigurable transmitarrays is presented. The element is made up of C-patches and modified ring slots loaded rectangular gaps. By controlling the bias state of four p-i-n diodes, three phase states are obtained. The dimension of the element is optimized by using full-wave EM simulation and performance of the element is validated by both simulation and an experimental waveguide system.

8p nguaconbaynhay10 22-01-2021 9 1   Download

A Multiple Input Multiple Output (MIMO) antenna with high isolation is proposed in this paper. The proposed antenna includes two sets of four elements (2 × 2) and it is yielded at the central frequency of 5.5 GHz for Wireless Local Area Network (WLAN) applications. Based on RT5880 with height of 1.575 mm, the overall size of MIMO antenna is 140 × 76 × 1.575 mm3 . To get high isolation between antenna elements, a Defected Ground Structure (DGS) is integrated on ground plane. Besides, the MIMO antenna witnesses a large bandwidth of 9.1% and an efficiency of 90% while the pick gain is 8.5 dBi.

7p trinhthamhodang9 10-12-2020 17 0   Download

This paper presents a microstrip antenna design which it's radiating element is circular and applied to 5G systems. The model and parameters of the antenna were simulated and analyzed by High-Frequency Structure Simulator (HFSS) computer code on FR4-epoxy laminate microwave.

7p viv2711 14-10-2020 16 1   Download

In this paper, a novel antenna array at 5GHz is presented with a low sidelobe level and wide impedance bandwidth for indoor positioning applications . The antenna array has the size of 450 ×57×0.8 mm3 with the high gain of 14.5dBi and the low SLL of -18 dB at 5GHz. The sesier feed using Unequal Split T-Junction is proposed with the Chebyshev-amplitude distribution to improve SLL. Besides the 1800 phase and amplitude distribution, by deploying driven elements above each single antenna element, the radiation pattern and the gain of the antenna aray are significantly improved.

11p 12120609 01-06-2020 18 1   Download

This paper demonstrates how you can use MATLAB® and Simulink® features and toolboxes to: design and synthesize complex antenna elements and MIMO phased arrays and subarrays; partition hybrid beamforming systems intelligently across RF and digital domains; validate spatial signal processing algorithm concepts...

22p son248 24-03-2020 17 1   Download

As an effective solution to the tradeoff between array size and the number of antenna elements, dual polarization antenna is widely utilized in massive MIMO systems. However, existing channel state information (CSI) feedback schemes are not suitable for dual-polarized massive MIMO as they ignore the polarization leakage between the polarization directions, causing significant performance degradation. To facilitate accurate channel acquisition, this paper proposes a practical channel model for dual-polarized massive MIMO by taking polarization leakage into consideration.

12p son248 24-03-2020 11 0   Download

Heterogeneous networks (HetNets) employing massive multiple-input multiple-output (MIMO) and millimeter-wave (mmWave) technologies have emerged as a promising solution to enhance the network capacity and coverage of next-generation 5G cellular networks. However, the use of traditional fully-digital MIMO beamforming methods, which require one radio frequency (RF) chain per antenna element, is not practical for large-scale antenna arrays, due to the high cost and high power consumption.

10p son248 24-03-2020 10 0   Download

The potential of using of millimeter wave (mmWave) frequency for future wireless cellular communication systems has motivated the study of large-scale antenna arrays for achieving highly directional beamforming. However, the conventional fully digital beamforming methods which require one radio frequency (RF) chain per antenna element is not viable for large-scale antenna arrays due to the high cost and high power consumption of RF chain components in high frequencies.

13p son248 24-03-2020 41 0   Download

This paper investigates the effects of the Cyclic Delay Diversity (CDD) transmit diversity scheme on DVB-H networks. Transmit diversity improves reception and Quality of Service (QoS) in areas of poor coverage such as sparsely populated or obscured locations. The technique not only provides robust reception in mobile environments thus improving QoS, but it also reduces network costs in terms of the transmit power, number of infrastructure elements, antenna height and the frequency reuse factor over indoor and outdoor environments.

10p son248 24-03-2020 18 1   Download