Home » International Journal

International Journal

Find a document written by the best international scientists in our secure database.

1382 documents found for International Journal
Analysis and design of TEM-TE coaxial waveguide bend mode converters
Qiang Zhang, Xuhao Zhao, Chengwei Yuan, Jiande Zhang
Published online : 01-04-2020
Article Access
View abstract
Two coaxial waveguide bend mode converters that transform coaxial transverse electromagnetic mode to TE coaxial waveguide mode are presented in this paper. Both converters are designed and optimized on the basis of the strictly derived mode coupling coefficients. Conversion efficiencies of both converters are over 99% and the power-handling capacities reach a gigawatt level. The combined dual-bend
Design and analysis of a tri-band frequency selective surface with a second-order response
Chunyan Gao, Hongbin Pu, Shan Gao, Chunlan Chen, Yong Yang
Published online : 01-04-2020
Article Access
View abstract
In this paper, a sandwiched type frequency selective surface (FSS) is designed and analyzed. The design procedure and operating principle is given based on the equivalent circuit model. The proposed FSS includes two identical layers of periodic metallic arrays, which are separated by a foam layer. In each layer of the periodic array, the unit cell is composed of a gridded-triple square loop struct
One-dimensional beam-steering Fabry?Perot cavity (FPC) antenna with a reconfigurable superstrate
Lu-Yang Ji, Shuai Fu, Lin-Xi Zhang, Jian-Ying Li
Published online : 01-04-2020
Article Access
View abstract
In this work, a new reconfigurable discrete 1D beam-steering Fabry?Perot cavity antenna with enhanced radiation performance is presented. It consists of a probe-fed patch antenna printed on the ground plane and a reconfigurable metasurface acting as the upper partially reflective surface to realize beam steering. By utilizing 6 × 6 proposed reconfigurable unit cells on the superstrate, the beam-st
MRF volume 12 issue 2 Cover and Back matter
Published online : 01-03-2020
Article Access
View abstract
MRF volume 12 issue 2 Cover and Front matter
Published online : 01-03-2020
Article Access
View abstract
Ultra-compact quasi-elliptic bandpass filter based on capacitive-loaded eighth-mode SIW cavities
Qing Liu, Dongfang Zhou, Dewei Zhang, Chenge Bian, Yi Zhang
Published online : 01-03-2020
Article Access
View abstract
This paper reports a novel fourth-order quasi-elliptic bandpass filter (BPF) based on capacitive-loaded eighth-mode substrate integrated waveguide (CLEMSIW) cavities. The CLEMSIW cavity is constructed by the conventional eighth-mode SIW with two dielectric substrates and three metal layers; a metal via is employed to connect the middle and bottom metal layers. The middle metal layer achieves a lar
Meta-waveguide analysis and implementation for using as a slot array antenna
Mahmoud Fallah, Mohammad Khalaj-Amirhosseini
Published online : 01-03-2020
Article Access
View abstract
This paper presents a novel concept named meta-waveguide structures to design slot array antennas based on metasurface. The proposed method investigates the geometrical parameters of the embedded metasurface and their relations to build up the engineered electric and magnetic fields to introduce efficient slot array antennas. This approach eliminates the necessity of using the well-known offsets i
Meta-heuristic optimization algorithms for simultaneous optimization of sidelobe level and directivity of uniformly excited concentric ring array antennas
Kailash Pati Dutta, G. K. Mahanti
Published online : 01-03-2020
Article Access
View abstract
This paper proposes the novel application of three meta-heuristic optimization algorithms namely crow search algorithm, moth flame optimization, and symbiotic organism search algorithm for the synthesis of uniformly excited multiple concentric ring array antennas. The objective of this work is to minimize the sidelobe level (SLL) and maximize the peak directivity simultaneously. Three different ca
Characteristic mode-based compact circularly polarized metasurface antenna for in-band RCS reduction
Puneeth Kumar Rajanna, Karthik Rudramuni, Krishnamoorthy Kandasamy
Published online : 01-03-2020
Article Access
View abstract
This paper presents a novel design of a low profile circularly polarized (CP) metasurface (MTS) antenna with in-band radar cross-section (RCS) reduction property. The MTS is loaded as a superstrate on slot antenna and it can be viewed as a polarization-dependent MTS (PDMTS). The rectangular patch-based PDMTS is analyzed using characteristic mode analysis to find two orthogonal degenerate modes, wh
Investigation of circular polarization technique in -slot antenna
Amer T. Abed, Mandeep S. J. Singh, Aqeel M. Jawad
Published online : 01-03-2020
Article Access
View abstract
This paper describes and analyzes a new technique used in -slot antenna to generate circular polarization (CP). The CP characteristics were investigated carefully by studying the surface current distribution, the phase difference between the left hand circular polarization (LHCP) and right hand circular polarization (RHCP) at some resonant frequencies, and the measured values of the axial ratio ba
Compact transition from CBCPW to substrate integrated suspended line (SISL) for operation up to 46 GHz
F. Parment, A. Ghiotto, T.-P. Vuong, L. Carpentier, K. Wu
Published online : 01-03-2020
Article Access
View abstract
A compact transition between conductor-backed coplanar waveguide (CBCPW) and substrate integrated suspended line (SISL) is presented. Compared to the reported transitions from CBCPW to SISL, performance and compactness are improved. For demonstration purpose, a multilayer transition is designed and fabricated for operation up to 46 GHz. Experimental results, based on an electronic calibration and
Flexible biomedical RF sensors to quantify the purity of medical grade glycerol and glucose concentrations
N. K. Tiwari, S. P. Singh, D. Mondal, M. Jaleel Akhtar
Published online : 01-03-2020
Article Access
View abstract
A novel flexible radio frequency (RF) sensor is designed to facilitate the accurate testing of various samples used in the biomedical industry at the industrial, scientific and medical (ISM) frequency band. The proposed RF biosensor comprises a liquid channel-loaded interdigitated capacitor, which is integrated on a coplanar waveguide structure. The prototype of the sensor is fabricated on a 0.13
Pattern and frequency reconfigurable antenna with diode loaded ELC resonator
Ghanshyam Singh, Binod K. Kanaujia, Vijay K. Pandey, Deepak Gangwar, Sachin Kumar
Published online : 01-03-2020
Article Access
View abstract
In this work, a new compact, low profile, frequency, and end-fire pattern reconfigurable antenna is presented. The proposed antenna consists of four parasitic elements and an electric-inductive-capacitive (ELC) resonator enclosed with a closed ring resonator (CRR). The reconfigurability in the proposed antenna is achieved with the help of five PIN diodes (D1?D5) embedded on the top surface of the
Dual-band slot microstrip patch antennas with dual-radiation modes for wireless communication
Guangwei Yang, Jianying Li, Jiangjun Yang, Zijian Xing
Published online : 01-03-2020
Article Access
View abstract
In this paper, a novel compact dual-band microstrip patch antenna with dual-radiation modes is investigated. The proposed antenna consists of a rectangular ground plane, a U-shaped feed probe, and an H-shaped slot radiating patch. By adjusting the size of these structures, a dual-band antenna can be obtained. In the low-frequency band, the antenna can radiate one radiation beam with high gain. In
A high selective tri-band bandpass filter with switchable passband states
Anjan Bandyopadhyay, Pankaj Sarkar, Tapas Mondal, Rowdra Ghatak
Published online : 01-03-2020
Article Access
View abstract
A new class of switchable bandpass filter using PIN diodes is presented in this paper. The design aims at achieving a multistate switchable bandpass filtering characteristics between the passbands centered at 2.4, 3.5, and 5.2 GHz. The proposed filter is designed by assembling two /2 open-ended and four short-ended /4 uniform impedance resonators. The open-ended resonator generates a fixed passban
A novel reconfigurable microstrip fractal UWB antenna with six variable rejection frequency bands
Nasrin Nemati, Mohammad Bemani
Published online : 01-03-2020
Article Access
View abstract
In this paper, a new reconfigurable microstrip fractal ultra-wideband antenna with a capability of variable rejection frequency bands is presented. The main patch of this antenna has two modified -shaped gaps. Also, on these -shaped gaps, 10 ideal MEMS switches are used to produce band-notch frequencies at six different frequencies of: 5.4 GHz (5.2?5.5), 5.8 GHz (5.7?5.9), 6.1 GHz (5.9?6.3), 7 GHz
MRF volume 12 issue 1 Cover and Back matter
Published online : 01-02-2020
Article Access
View abstract
MRF volume 12 issue 1 Cover and Front matter
Published online : 01-02-2020
Article Access
View abstract
Realization of transmission zeros for bandpass filter using inductive-coupled stub-loaded resonators
Fei Cheng, Ping Lu, Kama Huang
Published online : 01-02-2020
Article Access
View abstract
This article proposes a bandpass filter with three controllable transmission zeros (TZs) using three inductive-coupled stub-loaded resonators (SLRs). Different from other works, the proposed SLR can create one transmission pole and one TZ. With the TZs above the passband, high stopband rejection level is achieved. Moreover, the -inverters are realized by short-circuit stubs between two adjacent SL
A novel compact lowpass filter with sharp roll-off and wide stopband
M. Hayati, AS. Abdipour, AR. Abdipour
Published online : 01-02-2020
Article Access
View abstract
In this paper, a microstrip lowpass filter adopting two main resonators with steep transition band and wide rejection band has been introduced. The first main resonance cell consists of meandered transmission lines which are loaded by modified T-shaped patches. The second main resonator is composed of high-impedance lines loaded by polygon patches. To obtain a steep skirt performance, the first an
Measurement method for characterizing a millimeter-wave traveling-wave power combiner using test accessories
Honglei Sun, Xiao-Wei Zhu, Xuesong Shi, Ruijia Liu
Published online : 01-02-2020
Article Access
View abstract
This paper presents a novel assessment method that minimizes test-fixture-induced errors in non-coaxial power combiner measurement by extending the port reduction method. This method involves terminating certain ports to acquire the scattering matrix of an -port network from the scattering matrix measured at a reduced port order. The entire DUT scattering matrix is obtained from multiple scanning
Experimental validation of an isoflux Earth coverage with a bimode ARMA antenna on a nanosatellite
E. Arnaud, A. Siblini, A. Bellion, B. Jecko
Published online : 01-02-2020
Article Access
View abstract
Spatial telemetry links on nanosatellites require more and more reconfigurable beam antennas to improve the Earth coverage. The bi-mode Agile Radiating Matrix Antenna (8.0?8.4 GHz) was successfully designed to solve such kind of problems by using an isoflux mode associated with a switchable directive one. However, such an antenna introduces some manufacturing problems , mainly due to the small ava
Dual-function radar?communications: information transmission during FDA radar listening mode
Abdul Rahman Al-Salehi, Ijaz Mansoor Qureshi, Aqdas Naveed Malik, Wasim Khan, Abdul Basit
Published online : 01-02-2020
Article Access
View abstract
We investigate the frequency diverse array (FDA) for joint radar and communication systems. The basic idea is to use the transmitter/receiver modules of the radar system for communication purpose during listening mode as a secondary function. The radar will be performing its routine functions during the active mode as a primary function. An FDA at the transmitter side will be used to produce an or
Fully reconfigurable hexagonal-shaped comb-line filterplatform for prototyping and education purposes
Daniel Miek, Michael Höft
Published online : 01-02-2020
Article Access
View abstract
In this paper, a completely reconfigurable comb-line bandpass filter is presented. Due to the modularity, different standard coupling matrix topologies like the folded form, cascaded triplets, and the cul-de-sac form can be implemented and tested. Circuit-based coupling matrices like the extracted pole topology can easily be realized as well. Different types of input-/output- and cross-couplings c
Surface impedance properties of a wire grid embedded in a chiral medium
Z. A. Awan
Published online : 01-02-2020
Article Access
View abstract
The surface impedance characteristics of a wire grid composed of infinitely long parallel conducting wires embedded in lossless and lossy frequency-dispersive chiral background media have been investigated. Using wavefield decomposition approach for a chiral background and with the application of impedance boundary conditions for a wire grid, an analytic expression for the surface impedance of a w
0 document found for International Journal

ArtWhere Création de site Internet