High-order bandpass frequency selective surfaces (FSSs) (N ≥ 1) can achieve high performance with a flat in-band response and fast roll-off. One particular practical issue of designing FSSs using resonant is that the thickness substrate would be around quarter wavelength. On other hand, size nonresonant FSS array element usually large. A new miniaturized capable exhibiting second-order proposed in this letter. Two coupled by inductive layer are used to build FSSs. An operating at 3.8 GHz...

This paper presents a comprehensive study of groove gap waveguide (also known as waffle-iron) bandpass filter at Ka-band (26.5-40 GHz), fabricated using high resolution polymer jetting (Polyjet) 3-D printing technology. The same was previously brass CNC milling metalized Polyjet printed has lower loss, is lighter in weight and more cost-effective, when compared to the solid metal case. operates center frequency 35.65 GHz, 500 MHz bandwidth (1.4% fractional bandwidth), transmission zero below...

The effect of liquid on the performance a UHF RFID tag is investigated in this letter. It found that presence increases loss resistance equivalent circuit antenna. This leads to impedance mismatching with narrower bandwidth and degraded return loss. proposed solution for compensating add resonant RLC smaller parallel antenna body. corrects increased when frequency added part close working tag. simulation measurement results confirm an improvement matching increase reading range.

Traditionally, the element of a frequency selective surface (FSS) is rotationally symmetrical and arrays in multilayer FSS are aligned with each other. A new approach to miniaturize size array proposed this paper by interconnecting elements only one direction two-layer structure. One layer acts as an enhanced inductor while other provides capacitance. The interconnection between adjacent changes equivalent circuit produces strong cross-layer capacitance, which lowers resonant significantly....

In most applications, a frequency-selective surface (FSS) needs to be attached wide variety of dielectric materials. The performance traditional FSS is greatly influenced by the material which it attached. this paper, novel multilayer structure proposed construct an FSS. shown very stable when directly materials arbitrary thickness. Both single- and dualpolarized structures are designed. shape element designed using stepped-impedance transmission lines. A new methodology design maximizing...

A novel antenna design for implantable pacemakers is proposed. The housing of a pacemaker utilized as an to cover both the 402-405 MHz Medical Implant Communication Service band and 433-MHz Industrial, Scientific band. This achieved by exploiting radiating characteristic current modes case. These are excited using capacitive coupling element with help matching circuit. radiation pattern this optimized be in desirable direction away from body (off-body direction). ability proposed...

An approach to improve wireless power transfer (WPT) implantable medical devices using loop antennas is presented. The antenna exhibits strong magnetic field and dense flux line distribution along two orthogonal axes by insetting the port inside area. This design shows excellent performance against misalignment in y-direction higher WPT as compared with a traditional square antenna. Two were optimized based on this approach, one wearable other implantable. Both work at both ISM (Industrial,...

A novel hybrid ultra-high frequency radio identification tag is proposed in this paper. The offers the advantage of both dipole type and patch antenna depending on object it placed on. label-type dipoles are not functional metallic objects antennas efficient non-metallic objects, whereas a dual port design thus capable working two different modes off-metal on-metal scenarios. In mode, works as designed an FR-4 substrate with 3.2 mm thickness. wide capacitive loaded arms optimum tuned...

Non-contact and non-invasive heartbeat detection is one of various research objectives current emerging technology in fields, especially health care service. The signal without noise, interference irrelevant respiration with proper distance power level more preferable a system design to provide better monitoring system. purpose this paper aimed present filtering technique using Matlab simulation tool obtain smooth accurate heartbeat, the correlation based on Doppler Effect motion sensing...

This paper presents a new type of cross coupled low loss and high selectivity bandpass filter operating at millimeter wave band. The is designed based on groove gap waveguide technology. A Ka-band 4 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> -order proposed, fabricated. Cross coupling between one pair non-adjacent resonators has been introduced to produce two transmission zeros the frequencies below above passband. filter, which...

A novel approach to design a miniaturized frequency selective surface (FSS) is proposed. The miniaturization achieved by enhancing the inductance of proposed stepped-impedance array element. This enhancement done using micro-wire and controlling path current which passes through metallic As result, dimensions element are much smaller than wavelength at resonant frequency. FSS consists single metal layer on dielectric substrate with simple configuration. Through an example pass-band 3GHz, it...

This paper proposes a new approach to implement Frequency Selective Surfaces (FSSs) with sharp transition edges and almost flat bandpass responses. The design is suitable for submillimetre wave terahertz applications. proposed structure exhibits low insertion loss in the desired band. realized by combining bandstop FSS structures on same plane. By cascading more than one layers of surfaces, separated dielectric slabs, response passband characteristics can be achieved. polarization...

ABSTRACT In this letter, a novel technique is proposed to design dual stopband frequency selective surface (FSS) by combining bandpass filter with its complementary structure in series. It displays flexibility control the frequencies which most attractive feature of design. The FSS also very easy fabricate, consisting single metal layer on dielectric layer. A theoretical equivalent circuit model characterize structure. Explanation response based analysis discussed detail. shown that almost...

A study for reducing the sensitivity of label-type UHF RFID tags to background materials is done in this paper. It found that capacitance parallel feeding point tag most sensitive element circuit. The antenna body also be an important element. bigger leads less designs. Based on these findings a low profile and cost design proposed. protected by bottom conducting layer 3D dipole loaded with large capacitive patches at both tips. not only shows acceptable reading range various dielectric but...

A dual broadband flexible butterfly loop antenna is designed to be worn on a human body which covers several important bands for wearable applications including the MedRadio band 402-406 MHz and ISM (433-434, 902-928 2400-2483.5) MHz. This offers two wide reflection coefficient S11 -10 dB from 430-1003 2004-2700 with bandwidths of 573 696 respectively. The covered under -6 dB. feature gives robustness against frequency detuning effects makes it suitable in-body services such as communication...

This paper proposes a new method to implement Frequency Selective Surfaces (FSSs) with sharp band edge transitions suitable for millimetres wave applications. A bandpass FSS can be realized by combining two bandstop structures on the same plane. By choosing appropriate dimensions of structures, passbands and stopbands controlled obtain desired characteristics. With this method, multiple an achieved simultaneously. prototype is designed at Ka band. The fabricated then tested in free space...

Nano gap capacitors have recently received significant interest as a key component in wide range of implementations including photonics, Nanoelectronics, and sensing applications. Many exploratory research projects are being conducted to investigate the electrical characteristics these nano capacitors. One essential issue that this paper addresses is need for highly sensitive which can be adopted ultra-low power implementations. In paper, gold utilized electrode material owing its superb...

The rapid progress in mobile computing necessitates energy efficient solutions to support substantially diverse and complex workloads. Heterogeneous many core platforms are progressively being adopted contemporary embedded implementations for high performance at low power cost estimations. These experience workloads that offer drastic opportunities improve efficiency. In this paper, we propose a novel per gating (PCPG) approach based on workload classifications (WLC) minimization the dark...

In this paper, a new miniaturized frequency selective surface (FSS) structure is proposed. Compared with previous FSSs, the proposed has promising miniaturization features. The array element implemented by using vias to connect structures on two layers. dimensions of are only 0.035λ×0.035λ. top layer constructed four spiral-shaped structures; bottom made square-shaped patches. They connected in series vias. so doing, values resonant component increased; thus shifted downwards. response...

In high-order (N > 1) frequency selective surfaces (FSSs), the are usually cascaded vertically and separated by a dielectric substrate to achieve desired responses. The thickness is critical parameter in designing such structures. It high for most traditional designs. this article, we present novel approach extremely low-profile bandpass FSSs. structure built using coupling of third harmonics instead fundamentals resonators response. By proposed design method, between can be very weak with...

Wydawnictwo SIGMA-NOT wydaje czasopisma fachowe informujące swoich czytelników o najnowszych osiągnięciach naukowych i nowoczesnych rozwiązaniach technicznych w Polsce na świecie, popularyzuje problemy techniczne oraz poszerza wiedzę kulturę techniczną.

This paper proposes the design of a dual polarization frequency selective surface (FSS). The FSS displays high transmission, wide operational band, excellent band edge transition and polarization. bandwidth bandpass is up to 2.1 GHz at 5.26 resonant frequency. has similar transmission coefficient for different polarisations, although structure not rotationally symmetrical by 90° in xy-plane. theoretical equivalent circuit model proposed characterize structure, based on analysis geometry...

An antenna with compact size and enhanced impedance bandwidth (BW) is proposed using a novel approach to operate in the industrial, scientific, medical band (ISM) applications.The relies on exciting two resonant modes coupling them improve BW.

In this study, a novel frequency selective surface (FSS) structure was proposed to work as terahertz bandpass filter. The is relatively easy fabricate, exhibits high transmission of up 96%, wide bandwidth, and excellent band-edge transitions in the THz frequencies. A