Home » International Journal

International Journal

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

1030 documents found for International Journal
Aperture-coupled ESPAR antenna with unique feed network for symmetric switched beam radiation patterns
Hassan Umair, Niaz Muhammad, Tayyab Hassan, Imran Rashid, Farooq A. Bhatti
Published online : 01-04-2017
Article Access
View abstract
Aperture-coupled ESPAR antenna with a unique feed structure for switched beam application has been presented. The feed structure provides control over surface current of the driven element with the help of which main lobe can be steered in desired direction. This control has been achieved through the use of PIN-diodes. Finite element method has been utilized for design and simulated and measured r
A compact CPW-fed wideband metamaterial-inspired antenna for GSM, WLAN/Wi-Fi, and WiMAX applications
Ashish Gupta, Raghvendra Kumar Chaudhary
Published online : 01-04-2017
Article Access
View abstract
A compact coplanar waveguide (CPW)-fed wideband metamaterial-inspired antenna is designed and developed in this paper. The proposed structure is an asymmetric structure in which three rectangular stubs are employed between signal patch and CPW ground plane. It is demonstrated that these stubs provides lumped parameters of conventional epsilon-negative transmission line (ENG-TL). As an advantage of
Small-size LTE/WWAN monopole antenna with octa-band operation for 4 G mobile phone
Jui-Han Lu, Ying-Sheng Fang
Published online : 01-04-2017
Article Access
View abstract
By introducing a modified F-shaped feeding strip and dual parasitic shorted strips, a small-size wireless wide area network/long-term evolution (WWAN/LTE) printed antenna is proposed and embedded in the 4 G mobile phone with octa-band operation. The operating impedance bandwidths (RL ? 6 dB) of 263/1093 MHz can be obtained across the LTE/WWAN bands, respectively. The overall antenna size of the pr
Microwave photonic network for active electronically scanned array radar
Manisha Mathur, Jaynendra Kumar Rai, Nilakantan Sridhar
Published online : 01-04-2017
Article Access
View abstract
Active electronically scanned array (AESA) radar has large number of T/R) modules which require multiple microwave and digital signals. Distribution of these signals through conventional method such as coaxial cable, twisted pair, etc. not only introduces engineering complexities and signal loss but also have limitation of bandwidth, data rate, transmission distance, etc. This paper addresses desi
Dielectric characterization using FEM modeling and ANNs for coaxial waveguide with conical open ended radiation
Mohamed Mounkid El Afendi, Mohamed Tellache, Junwu Tao, Bilal Hadjadji, Mouncef Benmimoune
Published online : 01-04-2017
Article Access
View abstract
Since last decades, microwaves have received tremendous attention as an interesting tool for material characterization. In general, standard microwave measurement methods require cutting and polishing of samples to put it in a suitable waveguide or cavity. However, several methods have been developed in order to permit a non-destructive measurement. A well-known method is based on coaxial open-end
Development of compact inductive coupled meander line RFID tag for near-field applications
Abhishek Choudhary, Krishan Gopal, Deepak Sood, Chandra Charu Tripathi
Published online : 01-05-2017
Article Access
View abstract
The development of compact radio frequency identification (RFID) tag is the key requirement for wireless tracking of precious small size goods/packages in transport. A design of compact meander line tag antenna having inductive coupling feed is presented for RFID system operating at ultra high frequency band of . The size of the proposed tag antenna is , and is designed using Higgs 4 IC chip (made
A switchable bandstop-to-bandpass reconfigurable filter for cognitive radio applications
Hamza Nachouane, Abdellah Najid, Abdelwahed Tribak, Fatima Riouch
Published online : 01-05-2017
Article Access
View abstract
This paper presents a simple reconfigurable bandpass filter switching from to based on PIN diodes. The proposed filter is intended to add frequency-tunability to antenna systems used in cognitive radio applications. It consists of a bent connecting stub with two open-circuited quarter-wave stubs grounded via PIN diodes. By controlling the didoes states, the electrical length of the stubs can be
Analysis and design of a triple band metamaterial simplified CRLH cells loaded monopole antenna
Mahmoud Abdelrahman Abdalla, Zhirun Hu, Cahyo Muvianto
Published online : 01-05-2017
Article Access
View abstract
The design and analysis of meta-material inspired loaded monopole antenna for multiband operation are reported. The proposed antenna consists of multi resonators inspired from half mode composite right/left handed cells, which has a simple structure, compact size, and provides multiband functionalities. As a proof of concept, a triple band antenna covering all possible WiMAX operating bands, has b
Microstrip antenna miniaturization with fractal EBG and SRR loads for linear and circular polarizations
Mohammad Sadegh Sedghi, Mohammad Naser-Moghadasi, Ferdows B. Zarrabi
Published online : 01-05-2017
Article Access
View abstract
In this paper, combination of electromagnetic band gap (EBG) and split-ring resonator (SRR) loads with fractal formation for miniaturization of microstrip antenna is noticed. Here two different shapes of antenna have been studied with two well-known metamaterial structures as parasitic elements. A conventional microstrip antenna, which is surrounded by four EBG unit cells, is chosen as the first a
Segmented quarter cylindrical dielectric resonator antenna: simulation and experimental investigation in composite form for wideband applications
Pinku Ranjan, Ravi Kumar Gangwar
Published online : 01-05-2017
Article Access
View abstract
A probe feed wideband multi-element dual segments quarter cylindrical dielectric resonator antenna (q-CDRA) in composite forms have been proposed. The q-CDRA has been introduced by splitting CDRA into four uniform quarters and multi-segmentation approach has been castoff for further improvement in bandwidth of q-CDRA. The dual segments q-CDRA has been designed and analyzed using theoretical analys
Novel SRR-loaded CPW-fed UWB antenna with wide band-notched characteristics
Haijun Peng, Chunhua Wang, Lv Zhao, Jun Liu
Published online : 01-05-2017
Article Access
View abstract
This paper presents the design of a split-ring resonators (SRR) loaded coplanar waveguide-fed ultra-wide band (UWB) antenna. As using the electromagnetic coupling SRR connected by open-ended microstrip lines, this UWB antenna achieves wide band-notched characteristics. The frequency of the proposed antenna operates from 2.37 to 10.93 GHz with a broad notch band covers from 4.96 to 6.15 GHz (IEEE 8
Compact modified ?T? slot circular patch quad band antenna for MIMO applications
Chithradevi Rajagopal, Sreeja Balakrishnapillai Suseela, Nafiza Noorullakhan, Radha Sankararajan
Published online : 01-05-2017
Article Access
View abstract
Compact modified T-slot circular patch antenna for multiple input multiple output MIMO) applications, which has good response for four operating frequency bands is developed. Here the design consists of a circular patch with a new slot loaded T- shape on one side of the substrate and a feeder line on the other side of the substrate. A shorting pin is located between the patch and the feeder line.
Fork-shaped planar antenna for Bluetooth, WLAN, and WiMAX applications
Alaknanda Kunwar, Anil Kumar Gautam
Published online : 01-05-2017
Article Access
View abstract
A microstrip transmission line fed fork-shaped planar antenna is proposed for Bluetooth, WLAN, and WiMAX applications. The antenna made of a microstrip feed line, fork-shape patch on one side and defected ground plane on the other side of dielectric substrate. A fork-shape is formed by two side circular arms and a rectangular central arm. The inverted T-shaped ground plane with a rectangular slot
CPW-fed slotted CANTOR Set fractal antenna for WiMAX and WLAN applications
Abdelati Reha, Abdelkebir El Amri, Othmane Benhmammouch, Ahmed Oulad Said, Abdelhakim El Ouadih, Marouane Bouchouirbat
Published online : 01-05-2017
Article Access
View abstract
This paper presents the behavior of three iterations of a coplanar waveguide fed CANTOR Set fractal antenna. This kind of antennas allows having a broadband behavior and important gains. Also, the setup of slots allows having more lower resonant frequencies and therefore designing miniaturized antennas with good performances. The proposed antennas are suitable for 2.5/3.3/5/5.5 GHz worldwide inter
Reconfigurable circularly polarized capacitive coupled microstrip antenna
Dinesh Kumar Singh, Binod Kumar Kanaujia, Santanu Dwari, Ganga Prasad Pandey, Sandeep Kumar
Published online : 01-05-2017
Article Access
View abstract
The design and measurement of reconfigurable circularly polarized capacitive fed microstrip antenna are presented. Small isosceles right angle triangular sections are removed from diagonally opposite corners for the generation of circular polarization (CP) of axial ratio bandwidth of 11.1%. Horizontal slits of different lengths are inserted at the edges of the truncated patch to provide the dual-b
New Ku-band reflectarray antenna by using anisotropic superstrate on an artificial magnetic conductor
Mahmood Rafaei-Booket, Zahra Atlasbaf
Published online : 01-05-2017
Article Access
View abstract
A new Ku-band reflectarray with an artificial anisotropic slab that consists of periodic holes, backed by a planar artificial magnetic conductor (AMC) is proposed. The unit-cell of the reflectarray is a two-layered structure that consists of a dielectric with a hole on a grounded patch. The phase diagram of the proposed unit-cell is calculated by a full-wave computational technique, which uses the
MRF volume 9 issue 3 Cover and Back matter
Published online : 01-03-2017
Article Access
View abstract
MRF volume 9 issue 3 Cover and Front matter
Published online : 01-03-2017
Article Access
View abstract
A compact reconfigurable sub-nanosecond pulse generator with pulse-shape modulation
Arash Valizade, Pejman Rezaei, Ali Asghar Orouji
Published online : 01-05-2017
Article Access
View abstract
A new design of reconfigurable sub-nanosecond pulse generator (PG) with pulse shape selection ability is presented in this paper. Step recovery diode is used as the pulse sharpening device and the pulse shaping circuit consists of a controllable RC differentiator in which a single PIN diode is embedded, which provides two different switchable pulse shaping performances. The realized PG has a compa
Small embedded LTE/WWAN antenna integrated with keyboard ground plane in a laptop computer
Shu-Chuan Chen, Yun-Tsan Lee, Po-Wei Wu
Published online : 01-05-2017
Article Access
View abstract
A novel small embedded long-term evolution/wireless wide area network (LTE/WWAN) antenna integrated with the keyboard ground plane in a laptop computer is presented. The antenna is installed on a notched region (40 × 8 mm) of the keyboard ground plane at a distance of 10 mm from the laptop computer hinge. A coupled-fed loop antenna was used because of its suitability for integration with the groun
Broadband circular patch antenna with monopolar radiation pattern for indoor wireless communication
Xi Wang Dai, Sheng Wen Mao, Tao Zhou
Published online : 01-05-2017
Article Access
View abstract
A circular patch antenna with wide impedance bandwidth and monopolar radiation pattern for indoor wireless communication is proposed and analyzed in this paper. The antenna is a combination of circular patch and four capacitive feeds. By incorporating a cross-connected shorted conducting strip over the circular patch, the proposed antenna provides an enhanced impedance width of 65.4%, ranging from
Planar wideband band-stop filter with T-inverted shaped open stubs for wideband applications
Lahcen Yechou, Abdelwahed Tribak, Kacim Mohamed, Jamal Zbitou, Abdelmalik Bouyahyaoui, Angel Mediavilla Sanchez
Published online : 01-05-2017
Article Access
View abstract
This paper presents a wideband band-stop filter (BSF) structure designed by using planar technology. The proposed filter consists of a modified conventional band-stop structure with open stubs, inner T-inverted shape, and two input/output feed lines. Based on series of optimization and a specific design method, two compact filters with good electrical performance are obtained. In order to characte
Theoretical study of ground radiation tag antenna with Tunable open-slot exciter
Yi-Fang Lin, Ming-Jui Chang, Hua-Ming Chen, Shih-Ting Huang
Published online : 01-05-2017
Article Access
View abstract
A novel radio frequency identification tag antenna is composed of a resonant open-slot exciter and a dipole-type ground radiator. For a conjugate match to the Alien Higgs-4 chip impedance of 8?j149 ? at 925 MHz, a quarter wavelength open-slot resonator embedded at the center of the dipole-type ground plane (130 × 18 mm) was investigated and fabricated. Simple size adjustments and various loaded in
RF CMOS power amplifier using a split inter-stage inductor for IEEE 802.11n applications
Minoh Son, Jinho Yoo, Inseong Kang, Changhyun Lee, Jihoon Kim, Ho Jong Park, Young-Bae Park, Changkun Park
Published online : 01-05-2017
Article Access
View abstract
In this study, we design a differential CMOS power amplifier using a 180-nm SOI RFCMOS process for 802.11n (64-QAM, 20 MHz bandwidth, 9.6 dB peak to average power ratio (PAPR)) applications. To minimize the chip area and mismatch in differential signals, we propose a layout method with an inter-stage matching network using a split inductor. By virtue of the symmetrical layout of the proposed split
Millimeter-Wave Fresnel Zone Plate Lens with new technological process
Antoine Jouade, Jonathan Bor, Mohamed Himdi, Olivier Lafond
Published online : 01-05-2017
Article Access
View abstract
Fresnel Zone Plate lens (FZPL) antennas working in the V and W band are reported in this paper with half and quarter phase correction respectively. A low cost and straightforward technological process is used to manufacture the dielectric lenses using only one foam material where the dielectric constant is controlled. Simulation and measurement results are in good agreement that confirms the viabi
0 document found for International Journal

ArtWhere Création de site Internet