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Study of Substrate Integrated Waveguide and Gap Waveguide technologies used to manufacture some demonstration prototypes at Ka band for a low losses distribution network in a low profile antenna. A transmission losses comparison is presented using lossy and lossless dielectric substrates in the simulations for the different technologies at 30 GHz. Various structures such as transitions from WR-28,...
This work proposes the utilization of the Reflect Array (RA) antenna in the reader of the Frequency Coded (FC) chipless RFID systems aiming at increasing the reading range, minimizing the environmental reflections and acquiring a lot of novel capabilities that can not be provided by the conventional antenna systems. The FC chipless RFID system requires an UWB range of frequencies to accommodate multiple...
In this study, an electrically small, monopole slot antenna based on near-field resonant parasitic (NFRP) elements composed of metamaterial inspired capacitively loaded loop (CLL) elements is designed and analyzed via a commercial full wave electromagnetic solver. The proposed antenna has an operational frequency of 2.4 GHz and it satisfies the limits of an electrical small antenna (ESA) having a...
A novel four-element MIMO antenna operating at millimeter wave band is proposed. The half-mode substrate integrated waveguide (HMSIW) cavity backed slot antenna is used as the element to realize a compact structure, high radiation efficiency and interelement isolation. The simulated relative impedance bandwidth is 29.6% from 23.5–31.0GHz for S11<−10dB. And the isolation is lower than −22dB across...
This paper presents a novel circular polarized slot antenna design using microstrip-ridge gap waveguide technology, it possesses the easy manufacturing since it realizes the gap waveguide with PCB process. The antenna is composed of two substrates, by using the ring slot with a shorted strip on the upper substrate and the EBG textures located on the lower substrate, the circular polarized characteristic...
An electronically tunable polarization rotator based on tensor metasurfaces operating at 10 GHz is reported. The metasurface design allows the polarization tilt angle of a linearly polarized wave to be arbitrarily controlled through a simple biasing mechanism. In addition to allowing global polarization control, the design also allows global phase control.
A 4 × 4 circularly polarized antenna array with a substrate integrated waveguide feed network is proposed in this paper. The array is fabricated using low-cost printed-circuit-board and plated-through-hole technologies. The wideband single element is a modified spiral antenna with unequal arm lengths. The measured −10-dB reflection coefficient and 3.2-dB axial ratio bandwidths are 15.7% and 15%, respectively,...
A leaky-wave antenna (LWA) designed in substrate integrated waveguide (SIW) technology and showing high directivity in its transverse plane is presented. In addition, the proposed SIW LWA allows for the flexible control of its complex propagation constant, and thus of its radiation properties. For this purpose, the width of the SIW is used for the control of the phase constant and the separation between...
Availability of fast yet reliable replacement models (also referred to as surrogates) is essential to reduce the computational cost of antenna design process. Unfortunately, conventional approximation (or data-driven) modeling is not well suited for modeling of highly nonlinear responses of antenna structures, especially for larger number of geometry parameters. The latter is due to the so-called...
This paper presents the experience in designing LTCC antennas operated in F-band (90–140 GHz). A few examined structures are presented and their electrical parameters dependencies on LTCC technology limitations are shown. The paper is focused on two main aspects: the first one is related to the quality of multi-layered structures and the second one to the properties of metallization, which has a big...
In this paper a novel design of an UE (User Equipment) antenna for the 60-GHz band is presented. The antenna was realized on LTCC A6M-E substrate to ease a later integration with the RF-chipset on a single module. To satisfy the requirement of a relative bandwidth of 15 % an electrically thick substrate was utilized, which unfortunately leads to an undesired excitation of surface waves. A suppression...
A dual band antenna is inkjet-printed and then folded as part of a paper unmanned aerial vehicle (UAV). The patterns of the antenna are reproduced on a standard photo paper substrate using an off the shelf inkjet printer. Readily available cartridges with nanoparticle silver conductive ink are employed. A single-layer planar antenna is fed by coplanar waveguide (CPW). The geometry of the radiating...
This study presents the design of a dual-band cavity-backed phased array antenna with wide-angle scanning capability in K/Ka bands for the geostationary (GSO)-fixed satellite service (FSS). To reduce the losses and mutual coupling, a novel antenna element similar to the cavity-backed Strip-Slot-Air-Inverted-Patch (SSAIP) is proposed as an element of designed array of 81 elements. Wide-angle scanning...
In this paper, two chipless solutions dedicated to the authentication of manufactured products are proposed. One device is operating in the RF domain while the other used terahertz (THz) waves. The concept of chipless RFID is extended to authentication where each tag has to present a unique signature that can never be reproduced even if someone try to copy the tag. Both approaches use Electromagnetic...
A concept of a beam-steerable radiator based on a reconfigurable cavity antenna and coupling elements is proposed in this paper. The coupling elements are designed as magnetic dipoles which are realized using half-mode substrate-integrated cavities. Thus, the antenna exhibits vertical polarization in a planar structure. The main beam can be switched among different directions towards end-fire. Furthermore,...
This work presents the design and implementation of a phased array antenna for reconfigurable 5G backhaul network links. In order to minimize costs, the antenna has been developed using low cost RO4003 substrates and off the shelf electronic components. The antenna operates in Ka band (19 GHz) with scan range down to 50°.
A Frequency Selective Surface (FSS) on 175 μm thick quartz with gold trace and unit cell size of 728 μm × 728 μm was proposed in our earlier work for isolating three bands in 50 GHz–200 GHz range for passive atmospheric remote sensing. In this work, we present the factors influencing the performance of substrate backed FSS on frequency de-multiplexing. 3D numerical modeling is used to investigate...
A metasurface which has glide symmetry in two orthogonal directions is shown here as the building block for the design of surface wave lenses. This metasurface is shown to have reduced frequency dispersion when compared to a similar structure with reflection symmetry only. This work has the potential to create graded index lenses, with a high mode-index contrast, for use in surface wave antenna applications.
This paper starts with the description of a new direct chemical plating method for silver, called the JET METAL (JMT) process and of the JET SELECTIVE process, which allows to obtain a selective metallization on any substrate which can be metallized with the JET METAL process. This technology is based on spraying separately an aqueous solution containing silver metallic ions together with a CMR free,...
This paper introduces a miniaturized antenna structure with a complex substrate, which is composed with CER-10 and meta-material. This complex substrate influences to the impedance value of antenna system, then this can make the antenna size reduction. The proposed antenna structure reduces the conventional antenna size by 66.7 % with respect to pure meta-material substrate reduction rate of 40 %...
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