Home » International Journal

International Journal

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

1575 documents found for International Journal
MRF volume 13 issue 9 Cover and Back matter
Published online : 01-11-2021
Article Access
View abstract
MRF volume 13 issue 9 Cover and Front matter
Published online : 01-11-2021
Article Access
View abstract
Couplinator: A simple computational tool for synthesis of multi-section coupled-line filter based on MPCM-TLM technique
E. Faghand, S. Karimian, E. Mehrshahi, N. Karimian
Published online : 01-11-2021
Article Access
View abstract
A new simple computational tool is proposed for the synthesis of multi-section coupled-line filters based on combined modified planar circuit method (MPCM) and transmission line method (TLM) analysis, referred to as MPCM-TLM. Due to its fundamentally simple architecture, the presented tool offers significantly faster optimization of coupled-line filters ? for exactly the same initial simulation se
Millimeter-wave dual-mode and dual-band switchable Gilbert up-conversion mixer in 65-nm CMOS process
Fang Zhu, Guo Qing Luo
Published online : 01-11-2021
Article Access
View abstract
In this paper, a millimeter-wave (MMW) dual-mode and dual-band switchable Gilbert up-conversion mixer in a commercial 65-nm complementary metal oxide semiconductor (CMOS) process is presented. By simply changing the bias, the proposed CMOS Gilbert up-conversion mixer can be switched between subharmonic and fundamental operation modes for MMW dual-band applications. With a low local oscillator pump
Ultra-wide stopband lowpass filters using ring resonators
Mohsen Hayati, Sajjad Mohanad Mustafa, Farzin Shama, Hamed Abbasi
Published online : 01-11-2021
Article Access
View abstract
A microstrip-based lowpass filter (LPF) containing modified ring structures has been presented. Ring resonators are used to form a sharp transition region. In addition, rectangular- and tapered-shaped suppressing cells are used to create an ultra-wide stopband region. By combining the designed ring resonator and suppressors, an LPF has been designed with ?3 dB cut-off frequency at 1.83 GHz. A shar
Optimum design of linear and circular antenna arrays using equilibrium optimization algorithm
Ali Durmus, Rifat Kurban
Published online : 01-11-2021
Article Access
View abstract
In this paper, equilibrium optimization algorithm (EOA), which is a novel optimization algorithm, is applied to synthesize symmetrical linear antenna array and non-uniform circular antenna array (CAA). The main purpose of antenna array synthesis is to achieve a radiation pattern with low maximum side lobe level (MSL) and narrow half-power beam width (HPBW) in far-field. The low MSL here is an impo
Design and analysis of 4 × 4 MIMO antenna with DGS for WLAN applications
K. Malaisamy, M. Santhi, S. Robinson
Published online : 01-11-2021
Article Access
View abstract
In this paper, a low profile 4 × 4 multiple input and multiple output (MIMO) antenna is proposed and designed for wireless local area network (WLAN) application using a square split-ring resonator. Initially, a single square-patch antenna is designed with square-shaped split-ring slot. Subsequently, the two-element MIMO antenna is designed and it is extended to four-element MIMO antenna. Finally,
Design of elliptical-shaped reconfigurable patch antenna with shunt capacitive RF-MEMS switch for satellite applications
Bokkisam Venkata Sai Sailaja, Ketavath Kumar Naik
Published online : 01-11-2021
Article Access
View abstract
In this paper, non-uniform meandered line shunt capacitive RF-MEMS switch is presented at an elliptical patch etched with a split-ring resonator (SRR) for satellite communication applications. The non-uniform meander line shunt capacitive is a fixed-fixed type of RF-MEMS switch that is introduced in this model antenna. The proposed antenna design is resonated at 10.46 GHz with the return loss of ?
Radiation characteristics of microstrip antenna on frequency selective surface absorbing layer
Ashish Raj, Nisha Gupta
Published online : 01-11-2021
Article Access
View abstract
The radiation characteristics of the microstrip antenna (MSA) on the frequency selective surface (FSS) based absorbing layer is presented in this paper. It is observed that an absorbing layer placed between the MSA configuration and the ground plane helps in controlling the radiation characteristics of the antenna. It not only reduces the back lobe but also reduces the beamwidth and gain of the an
AMC-based antenna sensor for breast tumors detection
Praveen Kumar Rao, Ashish Ranjan Yadav, Rajan Mishra
Published online : 01-11-2021
Article Access
View abstract
The artificial magnetic conductor (AMC) formed by meta-materials is used in the micro-strip antenna design for microwave sensor applications. The AMC structures with two uniplanar layers, which include modified square split-ring resonator cells, are repeated and formed into a 5 × 3 array. The antenna's operational bandwidth result is significant, and it is in the range of 2.8?10 GHz with a maximum
Modified Koch curve broadband fractal antenna for spectrum sensing in cognitive radio
Monika Aggarwal, Amar Partap Singh Pharwaha
Published online : 01-11-2021
Article Access
View abstract
This paper presents the design and development of broadband modified Koch curve microstrip patch antenna with multiband characteristics for spectrum sensing in cognitive radio applications. The proposed spectrum sensing antenna is designed specifically for its efficient operation in the spectrum (1.683?3.05, 4.246?9.714, and 11.25?18 GHz) specified for , , , , with broadband characteristics and o
Compact wideband folded strip monopole antenna for brain stroke detection
Payal Bhardwaj, Ritesh Kumar Badhai
Published online : 01-11-2021
Article Access
View abstract
This paper introduces the CPW fed monopole antenna operating at multiple frequencies covering Ultra High Frequency (UHF) bands, suitable for biomedical applications. The planar antenna structure comprises an open loop and a dual folded monopole of optimized length. The antenna exhibits ultra-wideband frequency of operation ranges from 740 MHz to 4.02 GHz covering the frequency bands suitable for h
A compact polarization reconfigurable stacked microstrip antenna for WiMAX application
Murari Shaw, Niranjan Mandal, Malay Gangopadhyay
Published online : 01-11-2021
Article Access
View abstract
In this paper, a stacked microstrip patch antenna with polarization reconfigurable property has been proposed for worldwide interoperability for microwave access (WiMAX) application. The proposed antenna has two substrate layers: upper and lower layers with two radiating patches connected with the coaxial probe. Without the upper layer the lower square-shaped substrate layer having regular hexagon
Study of effective permittivity for a multilayer substrate dipole antenna
Julien Moussa H. Barakat, Fabien Ndagijimana
Published online : 01-11-2021
Article Access
View abstract
The design of integrated systems requires the knowledge of the values of the effective permittivity of the substrate. Designing antenna using computer-aided design tools is a long process that necessitates doing iterative steps to find the correct dimensions that meet specific requirements at a certain operating frequency. The objective of this work is to propose an analytic model to reduce the ti
Synthesis technique of a low-profile multiple sub-beam phased array antenna for high-throughput satellite applications
Elham Sharifi Moghaddam, Arash Ahmadi
Published online : 01-11-2021
Article Access
View abstract
Sub-beam concept is very useful for size reduction of multiple beam phased array antenna (PAA) systems that are applied for high-throughput communication satellites. In this paper, the synthesis procedure for a PAA with multiple sub-beams in two dimensions of the coverage domain is proposed and analyzed. In the design procedure, the interleaved sub-arraying technique has been applied to eliminate
MRF volume 13 issue 8 Cover and Back matter
Published online : 01-10-2021
Article Access
View abstract
MRF volume 13 issue 8 Cover and Front matter
Published online : 01-10-2021
Article Access
View abstract
A compact UWB antenna with triple band notch reconfigurability
Lei Li, Jingchang Nan, Jing Liu, Chengjian Tao
Published online : 01-10-2021
Article Access
View abstract
A compact ultrawideband (UWB) antenna with reconfigurable triple band notch characteristics is proposed in this paper. The antenna consists of a coplanar waveguide-fed top-cut circular-shaped radiator with two etched C-shaped slots, a pair of split-ring resonators (SRRs) on the backside and four p-type intrinsic n-type (PIN) diodes integrated in the slots and SRRs. By controlling the current distr
Investigation of organic corn husk-based flat microwave absorber
Soumya Sundar Pattanayak, Shahedul Haque Laskar, Swagatadeb Sahoo
Published online : 01-10-2021
Article Access
View abstract
Design and development of cheap and eco-friendly microwave absorber are one of the challenging and interesting topics for the scientific community nowadays. This paper proposes the design and fabrication of corn husk-based low cost, light-weight, and flexible microwave absorber treated as a promising eco-friendly microwave absorber. In this work, an extensive study on microwave absorption efficien
Compact stack EBG structure for enhanced isolation between stack patch antenna array elements for MIMO application
Mahesh B. Kadu, Neela Rayavarapu
Published online : 01-10-2021
Article Access
View abstract
In this research article, a compact wideband stack patch antenna array integrated with compact stack electromagnetic band gap (EBG) structure for multiple input multiple output (MIMO) application is proposed. The wide resonance bandwidth is achieved at 2.45 GHz band by stack arrangement of compact meander line slot driven and parasitic patch elements. The isolation bandwidth is matched with resona
Low-loss and tunable millimeter-wave filters using spherical dielectric resonators
Utpal Dey, Julio Gonzalez Marin, Jan Hesselbarth
Published online : 01-10-2021
Article Access
View abstract
Millimeter-wave band-pass filters using spherical dielectric resonators are presented. The dielectric spheres are sandwiched between metal plates and are excited by a simple microstrip line structure on a thin-film circuit board. As such, these filters could also be implemented in the back-end-of-line layers of an integrated circuit. A single resonator, based on a diameter 0.6 mm alumina ceramic s
A miniaturized flexible frequency selective surface for dual band response
Durai Kanchana, Sankararajan Radha, Balakrishnapillai Suseela Sreeja, Esakkimuthu Manikandan
Published online : 01-10-2021
Article Access
View abstract
In this paper, a novel miniaturized and flexible dual band frequency selective surface (FSS) is presented. This FSS provides effective shielding in X-band and Ku- band, with a frequency response of 9.4 and 16.7 GHz, respectively. The proposed FSS provides 924 MHz bandwidth at X-band and 1.34 GHz bandwidth at Ku-band with an insertion loss of 20 dB. Moreover, the proposed design is polarization-ind
A superstrate loaded aperture coupled dual-band circularly polarized dielectric resonator antenna for X-band communications
Sounik Kiran Kumar Dash, Qingsha S. Cheng, Taimoor Khan
Published online : 01-10-2021
Article Access
View abstract
A superstrate loaded cylindrical dielectric resonator antenna is developed and demonstrated for dual-band circular polarization. The proposed antenna employs a microstrip-fed rotated cross-shaped slot coupling technique for exciting the dielectric resonator (DR). The design is developed in a straight forward way. Firstly, the DR is coupled with a conventional plus-shaped slot and operates in linea
A novel design of ultra-wide stop-band single-layer frequency selective surface using square-loop and cross
Amit Birwal, Sanjeev Singh, Binod Kumar Kanaujia
Published online : 01-10-2021
Article Access
View abstract
In this paper, a novel design of ultra-wide stop-band single-side single-layer frequency selective surface (FSS) is presented. The unit cell of the proposed FSS is designed using the combination of conventional square loop and cross (CSLC). To enhance the bandwidth of this structure, an additional cross is inserted in all the four quadrants of CSLC. The stop-band transmission bandwidth assuming ?1
Four-element MIMO antenna for X-band applications
Ali Eslami, Javad Nourinia, Changiz Ghobadi, Majid Shokri
Published online : 01-10-2021
Article Access
View abstract
This study presents a new design of a four-element multiple-input multiple-output (MIMO) antenna, which is suitable for X-band applications. The circular polarization (CP) operation in this work is attained by using Tai Chi-shaped patches and L-shaped feeds. The proposed four-element MIMO antenna achieves two resonant frequencies, the first one at around 7.75 GHz and the second one with CP radiati
0 document found for International Journal

ArtWhere Création de site Internet