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Embedded smart sensor dipole antennas for real-time damage assessment, humidity, and temperature monitoring in reinforced and non-reinforced concrete structures
In this study, a dipole antenna is designed for real-time damage assessment, humidity, and temperature monitoring in reinforced and non-reinforced concrete structures. The antenna-based sensor is embedded into reinforced and non-reinforced concrete beams to assess electromagnetic measurements. Reflection parameter in dB values and resonant frequencies of the embedded antenna are evaluated to dete
Wideband split-ring antenna arrays based on substrate integrated waveguide for Ka-band applications
This paper presents wideband split-ring antenna arrays based on substrate integrated waveguide (SIW) for Ka-band (26.5?40 GHz) applications. The antenna array is fed by a 2.92 mm coaxial connector (K-connector) and the power is equally distributed to each split-ring resonator. The designed coplanar waveguide (CPW), SIW, CPW-to-SIW transition, coaxial-to-CPW transition, and two-stage SIW power divi
Design and analysis of wideband MIMO antenna arrays for 5G smartphone application
A new wideband multiple-input/multiple-output (MIMO) antenna system able to operate in a frequency band ranging between 3.3 and 7.1 GHz is proposed for fifth-generation (5G) new radio applications for future smartphones. The design structure contains four pairs of compact microstrip-fed slot antennas, located at the corners of an FR-4 printed circuit board. Each pair of antennas consists of a radi
Microstrip-line-fed inverted L-shaped circularly polarized antenna for C-band applications
A circularly polarized stub-matched inverted L-shaped antenna for C-band applications is presented in this communication. Antenna parameters of inverted L-shape on the radiating patch and slits, notch, square strips and stub on the ground plane and the effect of these are analyzed. The proposed optimized antenna (A: 0.54 × 0.54 × 0.02 mm) is selected among antennas (A ? A) with 5.1 GHz design freq
FSS-based triplate antenna design concept for wireless devices
Conventional multiband antennas suffer from strong interactions among different operating frequencies, complex configurations, low bandwidth, and reduced efficiencies. A design concept for a multibeam multiband antenna in wireless devices is proposed in this paper. The design concept provides a promising approach to augment transmission and reception. The principle of design involves a primary rad
Circularly polarized high-power antenna with higher-order mode excitation
A circularly polarized high-power antenna with higher-order mode excitation (TM) is presented in this paper. The proposed structure consists of metal plates placed on the conical horn antenna's aperture for achieving TM to circular polarized TE mode conversion at the output. The structure is simulated on CST Microwave Studio. The designed antenna exhibits high gain and a directive radiation patter
Transmission lines characteristic impedance versus Q-factor in CMOS technology
This paper presents a systematic comparison of the relationship between transmission line characteristic impedance and Q-factor of CPW, slow-wave CPW, microstrip, and slow-wave microstrip in the same CMOS back-end-of-line process. It is found that the characteristic impedance for optimal Q-factor depends on the ground-to-ground spacing of the slow-wave transmission line. Although the media are sho
Four-element pentaband MIMO antenna for multiple wireless application including dual-band circular polarization characteristics
In this article, a meander line-shaped pentaband (2.18?2.24, 2.38?2.46, 2.65?2.70, 3.10?3.32, 3.38?3.46 GHz) four-element multiple-input?multiple-output antenna is presented. The proposed antenna is also circularly polarized in two bands (at 2.2 and 2.4 GHz) with dual-polarization like right-handed at port 1 or 3 and left-handed at port 2 or 4, which is widely used for mobile satellite services (M
Backscattering cross-section from a metamaterial coated sphere covered with a metasurface
An analysis about the backscattering characteristics of a metamaterial coated magnetodielectric sphere covered with a metasurface has been presented. The effects of various types of metamaterial coatings and surface reactances of lossless metasurface upon the backscattering cross-section of a metamaterial coated magnetodielectric sphere covered with a metasurface have been studied. It is shown tha
Miniaturized CPW-fed UWB-MIMO antennas with decoupling stub and enhanced isolation
In this paper, a coplanar waveguide-fed ultra-wideband-multiple-input and multiple-output (UWB-MIMO) antenna with a novel stub for isolation has been presented. The dimensions of the proposed antenna are 18 × 22 × 1.6 mm. The proposed antenna is design on an FR4 substrate and simulated in CST studio. The || of the presented MIMO antenna is less than ?10 dB between 2.8 and 13 GHz with an impedance