Abstract We propose a novel configuration of triple band‐notched ultra‐wideband (UWB) antenna. The designed structure is based on an elliptical monopole antenna combined with complementary split ring resonator (CSRR) and spiral resonator. can achieve the dual‐band notched performance at WiMAX band ITU 8 GHz by adjusting length width line. Besides, CSRR obtain WLAN 5 changing radius slot. shows that VSWR less than 2 was satisfied resonant frequency in range 1.34–11.4 78.96%, except for bands....

A novel triple band-notched antenna for UWB application is proposed. The characteristic obtained by etching a complementary meander line split ring resonator inside the radiation patch and ground plane of rectangular antenna. It proved that performance at 3.31, 5.81 8.53 GHz can be two structures. proposed working from 2.4 to 12 with VSWR less than 2 demonstrated, except selected notched bands.

This work investigated three-dimensional (3D) focused microwave thermotherapy (FMT) at 925 MHz for a human tissue mimicking phantom using the time reversal (TR) principle musculoskeletal disorders. We verified proposed TR algorithm by evaluating possibility of 3D beam focusing through simulations and experiments. The simulation, along with electromagnetic thermal analyses model, was conducted employing Sim4Life commercial tool. Experimental validation on developed FMT system fabricated...

This paper presents an experimental measurement system for 3-6 GHz microwave tomography (MT) of the breast. The is constructed as a minimal test bed to verify key components such sensing antennas, radio frequency (RF) transceiver, mechanism, and image reconstruction method our advanced MT detecting breast cancer at early stage. has eight RF channels operating 3 6 high spatial resolution two-axis scanning mechanism three-dimensional measurement. results from are shown discussed.

A sensing probe for medical imaging diagnostic systems is presented. The proposed consists of a double‐ridged waveguide (DRWG) filled with dielectric ceramic and an aperture tapered ridge. DRWG used to suppress higher‐order mode radiations in the rectangular waveguide. designed broadband immersion liquid complex constant. performance fabricated successfully covers frequency band 3–6 GHz. suppresses modes provides symmetric similar radiation patterns within operating range.

This article presents a new application field of giant magneto-impedance (GMI) sensor. It shows valuable findings for the GMI sensor on possibility receiving element in magnetic communication. The proposed sensors serve as antennas and mixers receiver systems. They have advantage being easily implemented terms mass production manufacturing processes due to manufacture base printed circuit board (PCB). Their smaller size, lower cost, higher sensitivity more advantages than conventional...

In this paper, a deformed radiating element is proposed to design comb-line array antenna for low sidelobe levels in the millimeter-wave band. To with level, use of wide elements relatively large radiation conductance required. However, conventional rectangular has transverse current flows on it, resulting undesirable cross-polarization. On contrary, element, which implemented by cutting obliquely connection part feeding line from radiations currents cancel each other, and cross-polarization...

Given the interest of researchers for wireless communications in electromagnetic (EM) shadow areas, a magnetic field communication has emerged to overcome RF challenges based on permeability characteristics. However, demerit short range. Considering this limitation, we have proposed GMI sensor-based receiver obtain immunity low-frequency noise and high sensitivity extension range previous studies. Further, paper designs system with including transmitter. Even though basic concept is taken...

This study is a computational on focused microwave thermotherapy for knee pathological treatment using the time reversal (TR) principle in musculoskeletal disorders. The authors presented modified TR algorithm with amplitude compensation an accurate beam focusing of tumour location lossy medium. Furthermore, they proposed new approach called truncated threshold method, which could be used to apply effective while unwanted hot spots are controlled normal tissue region. Compared other existing...

Using the lateral phases separation of a binary immiscible polymer blend, we have fabricated random embossing structure (RES). The RES was investigated as potential for organic light-emitting diode (OLED) light extraction. Our yields uniform extraction in broad angle (0°∼70°) range with spectral stability. Blue phosphorescence OLEDs equipped showed an enhancement 20% external quantum efficiency (EQE)and stability within Δx,y < 0.01 viewing 0°∼70°. provides new and practical approach...

Radio reception relies on the medium which determines propagation characteristics of electromagnetic fields carrying information. The permittivity varies greatly depending medium, but it remains nearly constant, except when magnetic materials are used. For this reason, fields, typically affected by permeability, can be utilized in microwave challenging environments. In paper, a new approach based giant magnetoimpedance (GMI) effect is presented. proposed GMI-based receiver has an effective...

This paper presents the topology of a novel approach to magnetic communication using differential induction (MI)-based receiver and MI receiving sensor. In this paper, sensor based on two ferromagnetic cores is proposed as sensor, unlike air coil-type in conventional search coil concept. has advantages ultra-high sensitivity characteristics pT/√Hz level, which can detect weak fields communication; moreover, smaller than The contributes improving performance by increasing its signal-to-noise...

Abstract In this article, a new configuration of broadband antenna is proposed.The designed an elliptical monopole with complementary split ring resonator structure that inserted in the ground plane for rejecting 5‐GHz WLAN band (5.15–5.35 and 5.725–5.825 GHz). addition, impedance matching technique implemented by rectangular slot applied to suggested. The can be effective method achieve wider bandwidth. shows VSWR less than 2 was satisfied resonant frequency range 2.67–12 GHz. © 2011 Wiley...

This paper presents three types of phantom tests for non-invasive local thermotherapy using a 925 MHz phased array applicator. The microwave energy is focused at depth approximately 35 mm the with 100 W 10 min. As result, in two cases focusing on muscle area, heating width 23–31 (0.5–0.6 °C/mm) °C rise point. On other hand, when tumor area inside bone, maximum temperature slightly less than (0.3 °C/mm), and surrounding increases relatively more due to reflections caused by dielectric...

This paper presents a practical low-power, low-frequency magnetic induction (MI) transceiver based on symmetrical gaped two-loop antennas with an empirical circuit model for wireless underground communication. Because of the quasi-two-dimensional loop transmitter (Tx) and receiver (Rx), tailored hardware platform is not only simple, but can be readily extended to mutually orthogonal 3-D scheme. Through mixed actual measurement data theoretical parameters, we developed antenna space radius...

Abstract The temperature influence of the matching liquid used in microwave tomography platform system working from 3 to 6 GHz was analyzed on article. impact found using measured signal data. If is maintained ideally, data are obtained stable But, acquired unstable because can not be naturally. To obtain data, control devices required maintain liquid. Furthermore, variation important factor aimed for breast cancer detection. How much happened by studied overcome © 2014 Wiley Periodicals,...

This paper presents a study of the microwave energy localization for pathologic treatment knee in human tissue. For computational study, we have developed finite difference time domain (FDTD) electromagnetic (EM) solver and FDTD thermal solver. The simulation test using these was performed 2D model with tumor at 915 MHz. reversal (TR) algorithm proposed effective beam focusing target position. detailed results are presented discussed.

A microwave (MW) focusing technique for non-invasive thermal therapy is presented. The proposed provides a at localized tissues as cancer tissue and deep muscular disorder treatment. We employed time reversal the targeted MW computational solvers electromagnetic analysis are developed. To verify technique, we applied to an anatomically model based on magnetic resonance images. This work study predict performances of system in our future work.

본 논문에서는 CPW(Coplanar Waveguide) 구조와 대역 차단 특성을 갖는 CSRR(Complementary Split Ring Resonator)를 접지 면에 삽입하여 IEEE 802.11a(5.15～5.825 GHz) WLAN 대역이 저지된 광대역(Broadband) 안테나를 설계하고 제작하였다. 제안된 안테나의 크기는 <TEX>$36{\times}60{\times}1.6\;mm^3$</TEX>이며, 제작에 사용된 기판 의 두께는 1.6mm이고, 유전율이 4.4인 FR-4 기판을 사용하였다. 안테나 측정 결과, 반사 손실이 -10 dB 이하를 기준으로 2.03～10.78 GHz의 광대역 만족하였으며, 이때 VSWR<TEX>${\leq}$</TEX>2를 만족하였다. CSRR을 적용한 약 5.4 GHz 대역의 중심 주파수를 갖고, 4.917～6.017 GHz에서 저지 특성이 나타나는 것을 확인하였다. In this paper, a broadband antenna...

본 논문은 스파이럴 공진기(spiral resonators)와 CSRR(Complementary Split Ring Resonator)를 이용하여 삼중 대역 저지 특성을 갖는 UWB 안테나를 두 가지 타입으로 제안하였다. 제안된 안테나의 특성 분석을 위해 공진기와 CSRR의 구조 및 등가 회로를 통해 해석하였다. 첫 번째 타입의 측정 결과는 1.16~12 GHz에서 VSWR<2 이하를 만족하였고, 3.3~3.85 GHz, 5.15~6.1 8.025~8.5 특성이 나타났다. 타입 1.79~12 3.3~3.88 5.12~5.94 8.025~8.51 차단 측정결과를 안테나는 노치대역을 제외하고 전 대역을 만족하였다. In this paper, a triple band-notched antennas using spiral resonator and complementary split ring is proposed as two types. The band-rejection...

Abstract Telecommunications through an electrically conductive medium require the use of carrier bands with very‐low and ultralow frequencies to establish radiofrequency links in harsh environments. Recent advances atomic magnetometers operating at have facilitated reception digitally modulated signals. We demonstrate transmission quadrature phase‐shift keying (QPSK) signals using a multi‐resonant loop antenna magnetometer, respectively. report measured error vector magnitude according...

This paper presents the topology of a novel approach to magnetic communication using coil antenna-based transmitted system and differential induction (MI)-based receiver with MI sensor in underground mines. The test results limestone mine are presented. confirm that wireless digital quadrature phase shift keying (QPSK) is possible between Tx Rx at distance about 40 m. confirmed proposed can be utilized mining environments.

This letter presents the topology of a novel approach to magnetic communication using giant magnetoimpedance (GMI)-based receiver with GMI sensor in underwater media such as freshwater. In addition, practical channel test results for link freshwater are first presented. For this test, system GMI-based receiver, including triangularly arranged transmission coil antennas, was proposed. Wireless digital quadrature phase shift keying (QPSK), which is less sensitive noise and has high data rate,...