In this paper, two planar Frequency Selective Surfaces (FSS) with dissimilar configurations along monopole antenna exhibiting dual-band response at 3 GHz and 5.5 is presented. One of the surfaces reflectors reflective transmissive GHz, whereas opposite for FSS in another flat reflector. Accordingly exhibits directive radiation both frequencies, however directions. Unit cell on order <inline-for...

We propose and implement a geodesic half-Maxwell fish-eye (MFE)-lens antenna. The lens was optimized using an in-house physical optics (PO) code adapted for generalized lenses. final antenna design validated with commercial electromagnetic simulation software. combines modulated half-MFE transition to linear flare, which is needed preserve the polarization in aperture. prototype, designed opera...

This letter presents two slotted array antennas working in the Ka -band with switchable circular polarization capability. The first prototype is a series-fed slotted-waveguide linear composed of ten T-shaped slots. second antenna 2-D 2 × slots fed by corporate distribution network. In both case...

This paper presents a compact broadband stepped bow-tie antenna for ambient RF energy harvesting (RFEH). The proposed consists of shapes wide bandwidth, making it possible to investigate in entire cellular bands. In addition, the is composed shape achieve compactness internet things (IoT) sensors. We explain design steps taken this analyzing surface current distributions with respect number thr...

A dual-band miniaturized e-shaped antenna with circular polarization (CP) at 28 and 38 GHz is presented in this work for 5G millimeter-wave applications. Characteristic mode analysis (CMA) used the design steps of antenna. This compact consists a main radiating patch surrounded by an L-shaped hat-shaped metallic strips. The was implemented on single RO5880 substrate thickness 0.508 mm, fed coax...

Massive connectivity over wireless channels relies on aggressive spectrum sharing techniques. Conventionally, this may be achieved by sophisticated signal processing and optimization of applying multiple antennas and/or complex multiuser decoding at each user terminal (UT). Different from previous methods, letter proposes a radical approach for massive connectivity, which employs fluid antenna ...

This paper presents a compact, uni-planer wide band Multiple-Input-Multiple-Output (MIMO) antenna. The designed antenna array has compact size of (26mm x 31mm) covering frequency from 3.1GHz - 11GHz. A partial ground plane shared by two radiating patches is used. stub and single column Electromagnetic Bandgap (EBG) structure in between the results very low mutual coupling proposed MIMO-antenna ...

The analysis and new results of the resonance frequency and pattern fields of microstrip antennas array, with superconductor patch, for different very high critical temperatures, are presented. The linear superconducting rectangular microstrip antennas array use the new materials Sn5InBa4Ca2Cu10Oy at temperature of 212 K, conductivity of 1.88x10 S/m and Tl5Ba4Ca2Cu10Oy at temperature of 233 K w...

We describe a superconducting transition edge sensor based on a nanoscale niobium detector element. This device is predicted to be capable of energy-resolved near-IR single-photon detection with a GHz count rate. The increased speed and sensitivity of this device compared to traditional transition edge sensors result from the very small electronic heat capacity of the nanoscale detector element...

We show that it is possible to detect mechanical bending modes on 1μm long ropes of single walled-carbon nanotubes suspended between 2 metallic contacts. This is done by measuring either their dc resistance in a region of strong temperature dependence (in the vicinity of superconducting or metalinsulator transition), or their critical current. The vibrations are excited by a radio-frequency ele...