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1110 documents found for International Journal
Indoor target localization using single marginal antenna with virtual radars support
Ali H. Muqaibel, Abdi T. Abdalla, Mohammad T. Alkhodary
Published online : 01-11-2017
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In urban target localization, the presence of walls creates virtual radars (VRs), which can be exploited to aid in localization process. The fact that multipath changes with the radar locations, which are referred to as aspect dependence property, enable us to find a radar location, which reduces wall uncertainties. This paper proposes single-antenna target localization in an enclosed structure ta
Tri-band compact ACS-fed meander-line antenna for wireless communications
Ayman Ayd R. Saad, Ahmed A. Ibrahim, Osama M. Haraz, Ayman Elboushi
Published online : 01-11-2017
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In this paper, a compact tri-band asymmetric coplanar strip (ACS)-fed meander-line antenna for wireless communications is proposed. Two inverted-L-shaped resonators are added to a simple meandered radiator for standard tri-band operation. Parametric studies indicate that operating frequencies of the proposed antenna are determined by the dimensions of the two inverted-L-shaped resonators. The meas
Miniaturized Bagley Polygon power divider by using composite right-/left-handed transmission lines
Kaijun Song, Te Kong, Xue Ren, Yu Zhu, Yong Fan
Published online : 01-11-2017
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A miniaturized Bagley Polygon power divider based on composite right/left-handed transmission line is presented. The composite right/left-handed transmission line and conventional microstrip transmission line are utilized to realize the 0° phase shift transmission line, which is used to replace the 180° transmission line of the conventional Bagley Polygon power divider. As a result, miniaturizatio
Ultra-low-loss high-pass filter with air-core short-circuit coaxial cable
Hongfei Liu, Sander Weinreb
Published online : 01-11-2017
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This paper presents a novel ultra-low-loss high-pass filter with 3 dB cutoff frequency of 890 MHz for astronomical receiver radio frequency interference mitigation application. The filter consists of three series capacitors, four shunt inductors, and microstrip circuit board. Specially, 4 shunt inductors are actualized by fabricating air-core short-circuit coaxial cable inductors in the filter box
Miniaturized filtering SIW power divider with arbitrary power-dividing ratio loaded by open complementary split-ring resonators
Mostafa Danaeian, Ali-Reza Moznebi, Kambiz Afrooz, Ahmad Hakimi
Published online : 01-11-2017
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A miniaturized substrate-integrated waveguide (SIW) power divider with embedded filter response and arbitrary power-dividing ratio loaded by open complementary split-ring resonators (OCSRRs) is presented. In the proposed power divider, the miniaturization and filtering response are realized by a pair of OCSRRs, which are etched on the metal cover of the SIW structure. The design procedure indicate
A review of self-protection deceptive jamming against chirp radars
Samer Baher Safa Hanbali, Radwan Kastantin
Published online : 01-11-2017
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The well-known range-Doppler coupling property of the chirp radar makes it more vulnerable to different types of deceptive repeater jammers that benefit from the pulse compression processing gain of the radar-matched filter. These jammers generate many false targets that appear before and after the true target. Therefore, the radar cannot distinguish the true target from the false ones. This paper
Design of 2N-diode power-combined frequency tripler with coupled suspended striplines
Yinjie Cui, Jian Guo, Jie Xu, Hao Chi Zhang, Xiao-Wei Zhu, Cheng Qian
Published online : 01-11-2017
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A novel scheme for power-combined frequency tripler adopting 2N diodes is proposed in this work. Even mode coupled suspended substrate stripline is used to divide and recombine the input and output power. The circuits of the tripler are printed on both sides of the substrate, with N diodes on the front side and the other N diodes on the back side. The front diodes and back diodes are in anti-paral
Aspect-dependent efficient multipath ghost suppression in TWRI with sparse reconstruction
Ali Hussein Muqaibel, Abdi Talib Abdalla, Mohammad Tamim Alkhodary, Suhail Al-Dharrab
Published online : 01-11-2017
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In through-the-wall radar imaging, multipath propagation can create ghost targets, which can adversely affect the image reconstruction process. However, unlike genuine targets, ghost positions are aspect-dependent, which means their position changes with the transceiver location. This paper proposes efficient ghost suppression methods exploiting aspect dependence feature under compressive sensing
Design and layout strategies for integrated frequency synthesizers with high spectral purity
Frank Herzel, Dietmar Kissinger
Published online : 01-11-2017
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Design guidelines for fractional-N phase-locked loops with a high spectral purity of the output signal are presented. Various causes for phase noise and spurious tones (spurs) in integer-N and fractional-N phase-locked loops (PLLs) are briefly described. These mechanisms include device noise, quantization noise folding, and noise coupling from charge pump (CP) and reference input buffer to the vol
Design of penta-band low noise amplifier with integrated active antenna for vehicular communications
Ramya Vijay, Thipparaju Rama Rao, Revathi Venkataraman, Murugiah Sivashanmugham Vasanthi
Published online : 01-11-2017
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The design and integration of penta-band planar antenna with a low noise amplifier (LNA) for vehicular wireless applications is discussed in this research. By integrating antenna with a LNA, the return loss can be kept low with the increased bandwidth compared with a passive antenna with the same design. The performance of the passive antenna, LNA, and integrated active antenna (IAA) are individua
Study on the transmission characteristics of magnetic resonance wireless power transfer system
Xiufang Wang, Yu Wang, Yilang Liang, Guangcheng Fan, Xinyi Nie, Zhongming Yan, Qingying Xu
Published online : 01-11-2017
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Magnetic coupling resonance wireless power transfer technology has attracted worldwide attention in recent years due to its mid-range, non-radiative, and high-efficiency power transfer. However, in regard to its practical applications, there are still some issues that need to be considered and studied with respect to coil design, such as coil structure, and parasitic parameter extraction. This pap
SIW-fed microstrip patch antenna array for circular polarization
Laaya Sabri, Nasrin Amiri, Keyvan Forooraghi
Published online : 01-11-2017
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A new single-feed aperture-coupled, X-band microstrip patch antenna array with circular polarization (CP) is designed. CP is achieved using indented microstrip patches fed through the slots on a substrate integrated waveguide. The antenna has the high radiation efficiency more than 90% over the operating frequency. Impedance bandwidth (VSWR < 2) and axial ratio bandwidth (AR < 3 dB) of 11.8, and 1
CPW-fed SGF-TSRR antenna for multiband applications
C. Elavarasi, T. Shanmuganantham
Published online : 01-11-2017
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In this paper, a solid co-planar waveguide-fed fractal metamaterial antenna is offered. The proposed design consists of Sierpinski gasket iterations and a complementary triangular split ring resonator (CTSRR) loaded underneath the substrate, which is accountable for pull off multiband uniqueness and resolve good impedance identical. In sketch to hassle multiresonant frequency band facet, these CTS
A size-miniaturized bandpass filter with selectivity-enhanced and high harmonic suppression performance
Tao Huang, Zhenhai Shao
Published online : 01-11-2017
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In this paper, a novel microstrip bandpass filter is proposed to enhance sideband selectivity, suppress harmonic frequency up to three-order as well as to keep a miniaturized size for frequency synthesizer application. The filter is constructed by four /4 folded stepped-impedance resonators (FSIRs) and two /2 stepped-impedance resonators at input/output ports to create three pairs of coupling path
MRF volume 9 issue 8 Cover and Back matter
Asher Madjar, Arye Rosen
Published online : 01-12-2017
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MRF volume 9 issue 8 Cover and Front matter
Asher Madjar, Arye Rosen
Published online : 01-12-2017
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Editorial
Asher Madjar, Arye Rosen
Published online : 01-12-2017
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ANN-based radar approach to detect breast cancers in fibro-glandular tissues: numerical analysis
Salvatore Caorsi, Claudio Lenzi
Published online : 01-10-2017
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This paper presents a new artificial neural network (ANN)-based radar data processing approach for the detection of breast cancers located inside fibro-glandular tissues. The aim is not the breast imaging but detecting tumors through ANN processing of data extracted from the radar signals measured around the breast. The proposed approach has been assessed using several realistic two-dimensional br
Electrical performance analysis of a CPW capable of transmitting microwave and optical signals
Behnam Banan, Farhad Shokraneh, Pierre Berini, Odile Liboiron-Ladouceur
Published online : 01-10-2017
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A study on the microwave performance of a metallic transmission line capable of simultaneously transmitting microwave and optical signals is presented targeting millimeter-long interconnects. Conventional analytical solution is used to find the optimal structure for a given characteristic impedance. Then, functionality of the link is validated through S-parameter measurements for 3?13 mm long line
A 20 GHz microwave heater for digital microfluidic
Tomislav Markovic, Song Liu, Ilja Ocket, Bart K. J. C. Nauwelaers
Published online : 01-10-2017
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This paper reports on a microwave heater at 20 GHz for digital microfluidics. It allows rapid heating of nanoliter fluid samples and simultaneous temperature monitoring by correlating the reflection coefficient of the heater with the temperature dependency of the relative permittivity of the lossy fluid under consideration, in this case demineralized water. Microwave heating was performed with pow
Monostatic continuous-wave radar integrating a tunable wideband leakage canceler for indoor tagless localization
Marco Mercuri, Pawe? Barmuta, Ping Jack Soh, Paul Leroux, Dominique Schreurs
Published online : 01-10-2017
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Continuous-wave (CW) radars have been recently investigated in healthcare aiming at contactless health monitoring. However, a major problem in monostatic CW architectures is represented by the unwanted leakage produced by poor isolation between transmitter and receiver, which can drastically decrease the receiver's sensitivity reducing therefore the radar dynamic range. Although this situation can
MIMO antennas with diversity and mutual coupling reduction techniques: a review
Leeladhar Malviya, Rajib Kumar Panigrahi, M. V. Kartikeyan
Published online : 01-10-2017
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Multiple input multiple output (MIMO) antenna is at core of the presently available wireless technologies. The design of MIMO antennas over a limited space requires various approaches of mutual coupling reduction, otherwise gain, efficiency, diversity gain, and radiation patterns will be severely affected. Various techniques have been reported in literature to control this degrading factor and to
A wideband bandpass filter with multi-mode resonator and mixed electromagnetic coupling
Mengkui Shen, Xian Qi Lin, Zhaosheng He
Published online : 01-10-2017
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In this paper, a wideband bandpass filter using multi-mode resonator and mixed electromagnetic (EM) coupling is presented. To increase the bandwidth while not enlarge the circuit size, multi-short-stub multi-mode resonator, which produces multiple resonances, is utilized. Furthermore, the capacitive gap between open ends of the stubs is utilized to realize electric coupling between the multi-mode
Double-ring multiband microstrip patch antenna with parasitic strip structure for heterogeneous wireless communication systems
Geetanjali Singla, Rajesh Khanna
Published online : 01-10-2017
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In this paper, a novel design of compact Coplanar Waveguide-fed planar monopole antenna with enhanced bandwidth and multiband characteristics has been proposed. Two rectangular rings have been incorporated in a rectangular patch to obtain multiband operation for Wireless Local Area Network (WLAN) (2.4/5.2/5.8 GHz) and Worldwide Interoperability for Microwave Access (WiMAX) (2.3/2.5/5.5 GHz) bands.
A new hemostatic device utilizing a novel transmission structure for delivery of adrenaline and microwave energy at 5.8 GHz
Shaun C. Preston, Malcolm White, Brian Saunders, Zacharias Tsiamoulos, Christoper P. Hancock
Published online : 01-10-2017
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A novel transmission line structure has been developed to facilitate the delivery of both adrenaline and microwave energy to achieve hemostasis. A proximal end impedance transformer and radiative tip have been designed and manufactured to provide good match between the novel hollow transmission line and the microwave source and tissue, respectively. Further consideration of the challenges and prob
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