In this letter, frequency selective surface (FSS) properties of a uniplanar electromagnetic band-gap (EBG) unit cell are studied. The consists meander-line inductor and interdigital capacitors on one side substrate. Simulation results indicate that the exhibits passband characteristics centered at 10.04 GHz. FSS property structure is verified by measurement using X-band waveguides. measured show 9.45 A 13 × array these cells (FSS screen) used as superstrate distance ≈ 0.5λ <sub...

Abstract Despite advancements in terahertz (THz) modulators, achieving a balance between large modulation depth (MD) and fast speed scalable devices remains significant challenge. Optically pumped THz modulators with high MD, broad bandwidth, response times are essential for progress technology. Here, MoTe 2 /Si van der Waals (vdW) heterostructures grown via molecular beam epitaxy (MBE) as an optically leveraging its favorable band alignment seamless integration silicon complementary...

A polarization-insensitive dual-band artificial magnetic conductor (AMC) structure is designed and experimentally verified. It consists of a planar array annular ring-slot loaded rectangular patches. Details the proposed origin two bands discussed. Through simulations measurements, it shown that insensitive to polarization incident wave. The tuning higher AMC band demonstrated by varying capacitance slot through its width variation. used as reflector for wideband monopole patch antenna. at...

A broadband and compact stacked microstrip patch antenna has been developed using configuration. The comprises two parasitic patches above the driven fed by shifted feed a step transformer between to achieve coupling. Cross polarization improved inserting vertical slot in direction of feed. occupies very low volume 0.36λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">o</sub> × 0.39λ 0.096λ (radiating elements volume), while overall dimensions...

A simple technique to reconfigure a notch filter employing 1-D electromagnetic bandgap (EBG) structure, which is capacitively coupled microstrip line, presented in this letter. The resonant nature of the EBG creates transmission band. made reconfigurable/tunable by introducing an additional capacitive structure change size (geometry) unit cell. connected or disconnected main (unit cell) means PIN diode varactor diode. Its application notched-band ultra wideband (UWB) demonstrated. 450 MHz...

A series of monolithic tunable microwave band-stop filters and phase shifters have been designed, fabricated, characterized on arrays ferromagnetic nanowires (FMNWs) constituted Ni, Co, CoFeB, NiFe alloy embedded in anodic alumina templates (AAO). The aim the present investigation is to significantly boost operating frequency devices very low applied magnetic field. stop-band response can cover from 8 40 GHz with an field up 5 kOe using these materials. In addition, we observed a substantial...

A novel reconfigurable microstrip-fed patch antenna with polarization agility in either of two bands is proposed this communication. Frequency reconfigurability achieved by connecting an additional small to the main through a p-i-n diode. Each corner cutoff from narrow L-shaped cut get reconfigurability. In addition, impedance and axial ratio bandwidths are enhanced using proximity-coupled feed. Both prototypes designed, fabricated, tested. The measured results agree well simulated all...

In this paper, a polarization switchable reconfigurable microstrip patch antenna is designed first, it extended further to get switching in three frequency bands by using corner connection/disconnection and additional techniques. Three operating are obtained with centre frequencies of 5.1 GHz (first band), 5.45 (second 6.3 (third band) 5 p-i-n diodes. Proposed structure capable being switched between left-hand circular (LHCP), right-hand (RHCP), linear (LP) all bands. A proximity coupled...

The emergence of CubeSats/SmallSats began a miniaturization revolution in the satellite domain nearly 20 years ago. Only few people could have predicted their capabilities at time and, today, these small satellites are changing world completely different way. They established themselves as viable science platform. These best candidates for high-risk missions. CubeSat constellations or swarm missions will usher new era space exploration by providing multipoint measurements. This article...

This issue of Textile Progress reviews research and development into electromagnetic shielding materials for blocking a wide range frequencies. Different such as metals, metal-coated materials, polymer-coated conductive filler-reinforced polymers, fabrics their composites are reviewed in detail, hybrid prepared by applying ferrite or polymer coating to conventional shields using single-layer multilayer coatings. Research work carried out on is elaborated this review the with various...

In this article, through-the-wall human subject localization and respiration rate detection using a multi-channel Doppler radar is proposed. The proposed methodology used to detect signal of the when environment between wood, glass or any other material which resembles real-life situations. A major achievement that angular position multiple subjects their rates are estimated technique. system also removes null point problem present in single channel CW for vital sign detection. noise level...

Microstrip patch antenna with circular corner truncation is proposed to achieve polarization reconfigurability. By applying forward bias, reverse bias or zero the four PIN diodes, can radiate right hand (RHCP), left (LHCP) and linear (LP). Simulations as well experimental results show that demonstrates a very good impedance match for all three different polarizations without any additional matching network.

In this paper, a new way of obtaining band rejection in ultra wideband (UWB) filter using uniplanar Electromagnetic bandgap (EBG) structure is reported. The EBG has centered at 6.69 GHz which almost 38% lower compared with the conventional same dimensions. A one-dimensional coupled microstrip line provides narrow bandgap, used notch UWB filter. Single filters variations placement are fabricated producing 5.19 (wireless local area network (WLAN)). dual (5.16 and 8.24 (satellite...

A high linearity active inductor with a maximum measured Q of 70 and an input 1 dB compression point (Pin, 1dB) + 8 dBm (associated 10% increase in inductance from its small signal value higher power) is presented 180 nm CMOS. Applications such extending the Pin,1 Wilkinson power divider fully integrated second order capacitively coupled bandpass filter for blocker tolerant receivers are also demonstrated. Up to 5 dBm, seen have insertion loss (S21) dB. In each case, best our knowledge, this...

A novel and a robust synthesis technique for designing broad-band matching network is described. Such will be designed as band-pass filter that provides match while absorbing device parasitic within the network. This used in class AB power amplifier with flat large signal gain of 12 dB ±1 variation at saturation output 39 dBm over band from 1.6 GHz to 2.4 800 MHz bandwidth. The drain efficiency 65% achieved this entire operation corresponding 40% fractional

A new topology to reconfigure the radiation pattern in feedback-type oscillating active integrated antenna (AIA) is proposed and demonstrated this letter. The consists of an array two patch elements as a passive radiator with device form antenna. Three states (main beam at θ = 0°, +30°, -30°) broadside are obtained. Oscillations stable all states. structure fabricated tested; measured results verify operation three pattern. suitable for power-combining application millimeter-wave frequencies.

In this study, a range of conductive hybrid knitted fabrics and their composites have been investigated for shielding effectiveness in the frequency ranges 50 MHz to 1.5 GHz (low frequency) 4 8 (C-Band). Carbon stainless steel (SS) filaments were combined Dref-3 spinning machine different yarns prepared. The plain- rib-knitted made V-bed flat knitting from prepared yarns. composite laminate was by sandwiching ply fabric between polypropylene films compression moulding at 180 °C 5 min under...

This study presents a technique for analysis of multilayered stacked microstrip antennas using transmission-line (TRL) equivalent circuits, which has been validated by broadband antenna. A circuit model is developed dividing the antenna into number metal patch pairs are modelled as TRLs. procedure also outlined applying proposed method to large class antennas. The models all coupling parasitics antenna, responsible its operation, only closed-form equations TRL parameters without any curve...