Browsing 2018/1 by Title

Now showing items 1-20 of 41

  • 35-GHz Wideband Vertical Off-Center-Fed Dipole and Its Array in LTCC Technology 

    Du, Ming; Xu, Jun; Ding, Xiao; Cao, Jiangping; Deng, Jianhua; Dong, Yuliang (Společnost pro radioelektronické inženýrství, 2018-04)
    A 35-GHz wideband low-temperature co-fired ceramic (LTCC) vertical off-center-fed dipole antenna and its 2×2 array are presented. The widened bandwidth of the dipole antenna is achieved by paralleling a ring-shaped stub ...

  • Analysis of Propagation of Electromagnetic Waves in Atmospheric Hydrometeors on Low-Elevation Paths 

    Grabner, Martin; Pechac, Pavel; Valtr, Pavel (Společnost pro radioelektronické inženýrství, 2018-04)
    Attenuation of electromagnetic waves in millimeter wave bands is analyzed by means of experimental measurement of received signal fluctuations on terrestrial radio links operating in frequency bands 58, 94 and 122 GHz. ...

  • Analysis of Three-Dimensional Spatial Selectivity for Rician Channel 

    Du, Derong; Zeng, Xiaoping; Jian, Xin; Yu, Feng; Miao, Lijuan (Společnost pro radioelektronické inženýrství, 2018-04)
    The spatial selectivity of multipath fading determines the spatial diversity strategy to increase the performance of the communication system. This paper analyses the three-dimensional (3-D) spatial selectivity of Rician ...

  • Analytical Evaluation of Chunk-Based Tractable Multi-cell OFDMA system 

    Kavitha, Pillappan; Shanmugavel, Sethu (Společnost pro radioelektronické inženýrství, 2018-04)
    This paper evaluates thoroughly the performance of multi-cell OFDMA system. The two types of deployment in multi-cell OFDMA system, such as Strict Fractional Frequency Reuse (FFR) and Soft FFR (SFR) were evaluated. In order ...

  • Artificial Material Integrated Ultra-wideband Tapered Slot Antenna for Gain Enhancement with Band Notch Characteristics 

    Singha, Rahul; Damera, Vakula (Společnost pro radioelektronické inženýrství, 2018-04)
    The gain of the ultra-wideband tapered slot antenna (TSA) is enhanced by using broadband artificial material with band notch characteristics. The proposed artificial material unit cell is designed by fabricating non-resonant ...

  • ASE Noise in Raman Amplifiers: Pump Depletion Impact 

    Darwish, Samer; Samra, Ahmed; Aly, Moustafa (Společnost pro radioelektronické inženýrství, 2018-04)
    This paper provides a detailed analysis for the effect of pump depletion on amplified spontaneous emission (ASE) noise power, optical signal to noise ratio (OSNR), and noise figure (NF) in forward pumped distributed Raman ...

  • Asymmetric Image Encryption Approach with Plaintext-Related Diffusion 

    Oravec, Jakub; Turan, Jan; Ovsenik, Lubos; Ivaniga, Tomas; Solus, David; Marton, Michal (Společnost pro radioelektronické inženýrství, 2018-04)
    This paper deals with topic of image encryption based on chaotic maps. A solution which has advantage of robustness against chosen-plaintext attacks is proposed. Permutations of image pixels are carried out in a way that ...

  • Asymmetric Triangular Semi-Elliptic Slotted Patch Antennas for Wireless Applications 

    Darimireddy, Naresh K.; Reddy, R. Ramana; Prasad, A. Mallikarjuna (Společnost pro radioelektronické inženýrství, 2018-04)
    Microstrip radiators with Circular Polarization (CP) are paid much attention in wireless and navigational applications. In this paper, four microstrip rectangular radiators with axially centered asymmetric Triangular-Semi ...

  • Bandwidth Performances of Reconfigurable Reflectarrays: State of Art and Future Challenges 

    Costanzo, Sandra; Venneri, Francesca; Di Massa, Giuseppe; Borgia, Antonio; Raffo, Antonio (Společnost pro radioelektronické inženýrství, 2018-04)
    Reconfigurable antennas allow to meet the increasing demands of modern RF communication systems for reconfiguration capabilities, such as beam-steering, multi-band operation, polarization flexibility or frequency agility. ...

  • A Carrier Synchronization Algorithm for SDR-based Communication with LEO Satellites 

    Kozlowski, Sebastian (Společnost pro radioelektronické inženýrství, 2018-04)
    In this work a carrier synchronization algorithm for communication with low Earth orbit (LEO) satellites was proposed. The algorithm has a form of a software routine and is intended to be run on a typical personal computer ...

  • A Compact Rectangular Monopole Antenna Design with a Novel Feed for an Improved UWB Performance 

    Madanan, Gopikrishna; Das Krishna, Deepti; Aanandan, Chandroth Karuvandy (Společnost pro radioelektronické inženýrství, 2018-04)
    Printed wideband antennas, if not optimised both in frequency & time domain, often fail to qualify for UWB applications. This is primarily observed in designs based on multiple resonances. The excitation of different modes ...

  • Compact UWB Filtering-Antenna with Controllable WLAN Band Rejection Using Defected Microstrip Structure 

    Alhegazi, Ammar; Zakaria, Zahriladha; Shairi, Noor Azwan; Salleh, Azahari; Ahmed, Sharif (Společnost pro radioelektronické inženýrství, 2018-04)
    An ultra-wideband (UWB) filtering-antenna with controllable band notch is reported in this paper. The filtering-antenna consists of a modified monopole antenna and defected microstrip structure (DMS). The monopole antenna ...

  • The Correlation Characteristics of Polarization Backscattering Matrix of Dense Chaff Clouds 

    Tang, Bo (Společnost pro radioelektronické inženýrství, 2018-04)
    This paper studied the correlation characteristics of the polarization backscattering matrix of the dense chaff cloud with uniform orientation and location distributions in circular symmetry region. Based on the theoretical ...

  • Data Mining Techniques in Artificial Neural Network for UWB Antenna Design 

    Xiao, Li-Ye; Shao, Wei; Yao, Zhi-Xin; Gao, Shanshan (Společnost pro radioelektronické inženýrství, 2018-04)
    With data mining techniques for the preprocessing of training patterns, an artificial neural network (ANN) model is proposed for parametric modeling of electromagnetic behavior of ultrawide band (UWB) antennas in this ...

  • Design of Miniaturized 10dB Wideband Branch Line Coupler Using Dual and T-Shape Transmission Lines 

    Kumar, Mukesh; Islam, S. K. Nurul; Sen, Gobinda; Parui, Susanta Kumar; Das, Santanu (Společnost pro radioelektronické inženýrství, 2018-04)
    This paper presents a design mechanism of miniaturized wideband branch line coupler (BLC) with loose coupling of 10 dB. Dual transmission lines are used as a feed network which provides a size reduction of 32% with a ...

  • Design of Multi-Band Filters Using Parallel Connected Topology 

    Cheab, Sovuthy; Wong, Peng Wen; Soeung, Socheatra (Společnost pro radioelektronické inženýrství, 2018-04)
    This paper presents the design of multi-band filters using parallel connected topology. The resonator in each branch is the dual-mode resonator which provides two resonant modes per passband for miniaturization. The coupling ...

  • Differential Full Diversity Spatial Modulation using Amplitude Phase Shift Keying 

    Dwarika, Kavishaur; Xu, Hongjun (Společnost pro radioelektronické inženýrství, 2018-04)
    Diversity is a fundamental concept used to reduce the adverse effects of fading in wireless communications. Differential full diversity spatial modulation (DFD-SM) is a differential spatial modulation (DSM) scheme that ...

  • DoA Estimation in EM Lens Assisted Massive Antenna System Using Subsets Based Antenna Selection and High Resolution Algorithms 

    Shaikh, Sarmad Ahmed; Tonello, Andrea M. (Společnost pro radioelektronické inženýrství, 2018-04)
    In recent times, massive antenna array technology has captured significant attention among wireless communication researchers. This is a field with strong potential to increase rates of data transfer; mitigate interference ...

  • Effect of the Aperture Ratio on the Impedance Bandwidth of an Aperture Coupled Microstrip Antenna 

    Kim, Jae-Hyun; Kim, Boo-Gyoun (Společnost pro radioelektronické inženýrství, 2018-04)
    The effect of the aperture ratio on the impedance bandwidth of an aperture coupled microstrip antenna (ACMA) is investigated according to the coupling strength from a microstrip feed line to a patch. Since the coupling ...

  • Exploiting Support Vector Machine Algorithm to Break the Secret Key 

    Hou, Shourong; Zhou, Yujie; Liu, Hongming; Zhu, Nianhao (Společnost pro radioelektronické inženýrství, 2018-04)
    Template attacks (TA) and support vector machine (SVM) are two effective methods in side channel attacks (SCAs). Almost all studies on SVM in SCAs assume the required power traces are sufficient, which also implies the ...