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A novel mm-wave phased array antenna for whole metal covered 5G mobile handset is proposed. The proposed array antenna consists of eight rotated slot antenna elements that are arranged on the upper frame of the metal-body. The proposed array demonstrates good S-parameter characteristics in frequency band ranging from 27.1 to 28.6 GHz and mutual-coupling between antenna elements is less than −19 dB...
Electrically small Huygens dipole antennas are reported that are low profile, broadside radiating, have high radiation efficiencies, and are either linear (LP) or circularly (CP) polarized. The Huygens behavior, i.e., a high front-to-back ratio with a cardioid-like pattern, is realized by exciting two (LP) or two pairs (CP) of complementary electric and magnetic dipole radiators, simultaneously having...
A surface wave antenna with an antenna gain of 6.29dBi and an FB ratio of 16.7dB at 8.3GHz is presented. This antenna is vertically polarized and designed for unidirectional beam having a low-profile structure with a height of 0.098λ_0. This antenna is composed of a loop element and arrayed dogbone-shaped elements. The phase distribution of electric field radiated from both elements are analyzed the...
This paper presents a design of the universal reader antenna applied for the radio frequency identification (RFID) system with the operating frequency from 840 MHz to 960 MHz. The antenna structure consists of a rectangular loop and a rectangular feeding patch which are the important elements to produce the circular polarization. The total size of the reader antenna is 120 mm ×120 mm fabricated on...
We have proposed an open terminated folded inverted-L antenna (FILA) with slits. In order to miniaturize the FILA, several slits are employed on the substrate surface. Folded structure is used for broadbanding. Design of the FILA to achieve broadband characteristics is shown. Simulation and measurement are implemented, and comparison of the results are evaluated. Finally, we calculate the product...
This paper presents for the first time an innovative 3D printed SoP sensor node with temperature, pressure and humidity sensing capabilities. It has an integrated wireless readout through a near isotropic (900MHz) GSM antenna-on-package. This sensor node is connected to the internet for remote monitoring and has the capability of localization. The paper presents the design of antenna-on-package as...
The Characteristic Mode theory of antenna analysis and design has received the attention of many researchers in recent years, because it provides a brand new way of looking at the problem of placing antennas on a given platform to achieve a desired radiation pattern; to reduce coupling between antennas in a MIMO design; to achieve a wideband performance compared to that of the original antenna, etc...
In this paper, the size of a log-periodic dipole array antenna is reduced using partially applied folded planar helix dipole elements. The proposed antenna shows almost no gain deterioration in the entire operating bandwidth even though its size is reduced by 39 %. Due to its reduced size and lightweight characteristics, it is expected that the proposed antenna could be effectively utilized in the...
We report the intermediate results on a novel slotted waveguide antenna for point-to-point communications at Ka band. The antenna adopts an aperiodic layout with uniformly-excited elements capable of meeting the ETSI class II radiation pattern envelop in all planes with high aperture efficiency. A total of 16 regular waveguide subarrays with an aperiodic inter-column spacing along the E-plane are...
With compact folded method, a kind of folded crossed dipole ultra wideband antenna is proposed with omnidirectional radiation characteristics on the horizontal direction in this paper. The antenna is comprised of orthogonal crossed semicircular metal discs with twice 90° folded on both ends. Horizontal size is reduced obviously compared with original crossed semicircular disc antenna. This antenna...
We herein investigate the design of a tapered slot antenna (TSA) that is divided into a radiator and a feeding circuit (balun). We measured the differential component and common component of the surface current on the TSA in a previous study. Moreover, we measured the radiation patterns of the radiator and the balun in order to discuss the radiation of the TSA. In particular, the differential component...
This paper presents the results of the antenna pattern measurements conducted on the Ice Cloud Imager 664 GHz feed horn at the ESTEC Sub-mmwave Scanner (SmS) in support to the ICI instrument of the MetOp-SG program. Very good agreement between simulations and measurements was obtained, both in the co- and cross-polar component. The measured peak directivity was 26.28 dBi ± 0.13 dB while the simulated...
This paper will present a series of novel polarization reconfigurable antennas for modern wireless applications. First, three multi-linear polarization reconfigurable antennas with the switchable 0°, +45°, 90° and −45° polarizations are investigated for mitigating the polarization mismatching problem in wireless biomedical applications. Three distinctive techniques were adopted to realize the same...
In this paper, the bandwidth enlargement method of the conventional λ/4 monopole antenna on finite ground plane is investigated for utilization in IFF (Identification friend or foe) of the secondary radar the operating frequency 1.03–1.09 GHz. For the initial study, we have proposed the structure of the resonant holes on the surface of a sector of metallic cylinders covering such the monopole that...
The active element pattern (AEP) and beam pattern of a patch array antenna are analytically calculated with a finite ground plane. The patch antenna is modeled by two equivalent magnetic current sources. Edge diffraction by surface wave is also added. To obtain AEP, the phase and magnitude of scattering parameters from full-wave simulation are utilized. To validate our calculation, the calculated...
An 8×8 slot array with high-efficiency and corporate-fed single layer by ridge gap waveguide at 60-GHz is introduced in this paper. The manufactured antenna depicts more than 19.6% bandwidth with input reflection coefficient better than −10 dB and the aperture efficiency higher than 70% with around 26 dBi realized gain between 58 and 66 GHz.
This work presents a high-gain double reflectors microstrip-fed slot antenna for WLAN and WiMAX applications as the IEEE 802.11b/g and IEEE 802.11a standards. The antenna is composed of a microstrip-fed slot with a complementary stub on a single substrate and a pair of reflectors. The reflectors are exploited to achieve bi-directional radiation patterns which is suitable for using in buildings or...
H-Plane substrate integrated waveguide (SIW) antenna made of textile for millimeter wireless body area network (WBAN) application is proposed. Three-stepped tapered matching structure was added to a coaxial feed for improving the impedance matching. The ground was extended to the antenna aperture to prevent the degeneration of radiation pattern by phantom. The extended arc shaped substrate improves...
The objective of this paper is to describe a least square method to compute the far field from a nonuniformly spaced antenna array. This is because the far field pattern of an antenna array is the Fourier transform of the current distribution developed on the antenna structure, This is equivalent to computing the spectrum from a nonuniformly spaced data set using a least squares method. The merit...
We present an ultra-wideband antenna for mm-wave applications. The antenna consists of a bowtie patch integrated with the feeding network. The feeding network is implemented as a multilayer substrate structure. The differential excitation of the bowtie is performed in a similar way to Magneto-Electric Dipoles and Marchand baluns. The simulated antenna shows a relative bandwidth of 2.6 : 1 with a reflection...
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