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A simple circularly polarized (CP) antenna array is proposed for millimeter-wave applications. The proposed CP antenna array has a two-layer structure, which is easy for fabrication. A circular loop with a parasitic element is used as the radiation element for wideband operation. It is shown that the proposed 4×4 CP antenna array can achieve a gain of 13–16 dBi from 28.5 to 31.5 GHz.
The development of left-handed circularly polarized (LHCP) X-band printed antenna for microsatellite data communication is presented. The antenna which takes a circular shape with ellipse-shaped truncation is designed to resonate at the frequency of 8.2GHz with the minimum axial ratio bandwidth of 400MHz. The proposed antenna is deployed on a 1.6mm thick NPC-H220A dielectric substrate. The realized...
In this paper, a 60 GHz CMOS on-chip dipole antenna with loss-reduced silicon substrate, which had been proposed and simulated by the authors, was measured and gain improvement of approximately 9 dB was obtained. In the antenna, rectangular region with 500 μm × 1000 μm around the dipole is irradiated by proton and conductivity is reduced from 10 S/m (10 Ω cm) to 0.1 S/m (1 kΩ cm). Antenna gain of...
In this paper, a novel antenna suitable for wearable LoRa devices is introduced. Its size is just 42.5 × 45 mm2, similar to the size of a watch, thanks to the advantage of a wire-patch antenna structure. The proposed antenna operates at 868MHz frequency band with the realized gain up to 0.4 dBi. This antenna is proved to be better than former designs by obtaining azimuthal polarization which reduces...
Meta-surface inspired antenna (called MACKEY) which works not only in free space but also on metal plates, was proposed. In this paper, a dual-band MACKEY device, in which the position of the dipole antenna is changed from the center of the substrate, is proposed. Additionally, the conditions for controlling the resonance frequencies are clarified.
In this paper, A novel stable gain printed log-periodic dipole antenna (PLPDA) with two slotted dielectric substrates, based on the substrate integrated waveguide (SIW) technologies is proposed. This antenna consists of a traditional PLPDA fed by SIW, which reduces dielectric loss and conductor loss and two pieces of Rodgers5880 substrates with periodic slots, two pieces of Rodgers5880 substrates...
A novel polarization reconfigurable aperture-coupled magneto-electric (ME) dipole antenna is presented. By electronically controlling the state of switches between square patches and an additional strip of the ME dipole, the antenna is capable of switching the polarization among one linearly polarized (LP) and two orthogonal circularly polarized (CP) states. An overlapped bandwidth of 16% from 5.07...
The paper proposes a new beam-switchable dipole antenna. The functionability is realized by reconfiguring the state of the four side apertures of a square substrate integrated waveguide (SIW). Four wide dipoles are loaded in front of the four apertures. The selected radiating aperture is able to excite the corresponding loaded dipole. The other dipoles work as reflectors. Thus, directional radiation...
This paper presents a circularly polarized tag on an AMC to achieve longer read range for UHF RFID on-body applications. In the conference paper, two asymmetrically orthogonal cross-dipoles printed on FR4 substrate are combined to generate a degenerate mode for circularly polarization. A symmetric T-matching transformer is employed to conjugate matching with a Monza 4 microchip. The body effect is...
In this paper, a 2 × 8 elements ultra-wideband tightly coupled dipole antenna array is presented. The array is constructed by placing alternate dipole elements on the opposite sides of a substrate. The array is designed to operate in the FCC frequency band for ultra-wideband (3.1 GHz to 10.6 GHz) wireless communication. The mutual coupling between the elements in the proposed array is high and it...
This paper presents the design of a planar, low-profile, high-gain, wide-gain-bandwidth metasurface antenna with a multiple feeding structure. The antenna structure consists of a 5×5 array of square patch metasurface and a planar feeding structure, both of which are patterned on a high-permittivity, electrically thin, GaAs substrate. The metasurface is etched on the top side of the substrate, while...
A novel V-band 1 × 4 dipole phased array antenna on extended Hemi-spherical dielectric lenses using a microstrip Rotman lens is presented. This phased array antenna employs an integrated lens as a reflector to tilt the main beam in broadside direction. A prototype phased array system is designed with 7 beam ports, 4 array ports, and 8 dummy ports. A 60 GHz four element dipole linear array antenna...
We present simulations showing how metallic dipole structures can be used as a fundamental platform for electron field emission (EFE) enabled by a strong terahertz (THz) transient. We present space-time mapping of the ultrafast dynamics of EFE with an approximately free-standing dipole versus two dipoles placed with a small gap in between. We conclude that it is possible to make ultra-bright electron...
The simulation software gprMax uses the Finite Difference Time Domain (FDTD) method to model propagating electromagnetic (EM) waves primarily for the purpose of ground-penetrating radar (GPR). This open source tool provides a means to investigate the optimal specifications for ground-coupled and air-launched antennas prior to construction. In order for this modelling capability to be fully exploited,...
As a rule nanoantennas represent shaped nanodipoles placed either in some media or mounted on the planar dielectric substrate. In this paper we propose some designs which are new for nanoantennas, namely, shaped silver nanodipoles like a traditional nanodipole and a shaped slotted torus nanodipole are placed on the glass circular cylindrical substrate. In these designs nanodipoles are mounted on the...
A novel cavity-backed slot antenna, with the ability of reconfiguring the frequency, polarization and radiation pattern, is presented. The reconfigurability is realized by electronically controlling the state of switches between two crossed slots etched on the surfaces of a substrate integrated waveguide (SIW) cavity. The antenna is capable of simultaneously changing the radiation patterns between...
This paper presents characteristics of a free access transmission line consisting of a paper substrate and foam instead of dielectric substrate for easy installation in body area network applications. We measure the coupling characteristics between two dipole antennas above the proposed transmission line to show its basic performance. The coupling level between two dipole antennas on body propagation...
Barcode systems are increasingly replaced by Ultra High Frequency (UHF) Radio Frequency Identification (RFID) based automatic identification technology. However, accurate inventory tracking has not yet been achieved due to various reasons such as high cost, low scalability and limited antenna features. This paper presents a low cost, scalable far-field antenna array design with multiple beam and polarization...
A substrate integrated waveguide (SIW) H-plane horn antenna is designed in Ka-band for millimeter-wave applications. An impedance bandwidth of wider than 42% for |S11| of less than −10 dB, gain up to 13.6 dBi with a variation of 3.4 dB across the operating band and symmetrical radiation pattern with low backward radiation are achieved by the proposed design.
This paper addresses recent advances obtained in LAAS CNRS concerning the developments of the flexible kapton technology and the use of this technology in the manufacturing of flexible and conformal structures for applications like Wireless Sensor Networks (WSNs) and Structure Health Monitoring (SHM). Flexible kapton supported passive devices are presented as well as the technological process developed...
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