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This paper discusses the design and implementation of an RFID-based access control system for use in a University campus. This system's design begins with the design of a power-efficient and cheap passive 125Khz RFID tags and reader antennae using the HFSS software. The key antenna design goals are miniaturization, power efficiency (passive RFID), linear polarization and a narrow beam/gain width....
Direction of arrival estimation has a wide range of applications, both military and commercial, and the search for low complexity methods with high accuracy is an important research area. Many of the well-known methods rely on time averaging of received data to acquire the covariance matrix, essential in the estimation method. Some methods depend on single snapshot in time (single symbol) to generate...
Recently, a considerable attention has been paid for full duplex communication. Full duplex allows transmitting and receiving at same frequency simultaneously. As a result, the spectral efficiency can be increased two times by utilizing this type of communication. Nevertheless, the substantial issue of applying full duplex communication is the self-interference signal. This paper presents a new method...
The remarkable growth in wireless communication technologies in recent times has motivated the synergy between wireless systems and medical sciences for improved healthcare services. Several emerging wireless technologies and approaches have therefore been proposed to achieve various efficient monitoring systems for health-related activities. In this paper, localisation of a patient using the ranging...
A Monopole antenna loaded with CRLH resonator (composite right left hand) for multi-band application also for miniaturization effect, the antenna contains a monopole antenna with a defected ground at the bottom side, the antenna is loaded with a set of TL (transmission line) as inductors and capacitors. The aim of this work is to exhibit the bandwidth and the multi-band by the insertion of the CRLH,...
This paper demonstrates structural changes in variable structure control. A second order open loop unstable system was used as an illustrative example to demonstrate the structural changes; the system has real, positive open loop eigenvalues. A change of system eigenvalues implies a change of system structure. A structure may have properties such as being stable or unstable, fast/sluggish response,...
Direction of arrival (DOA) estimation is currently an active research topic playing a fundamental role in many applications including electromagnetic, tracking systems and signal processing applications. This paper evaluates the performance estimation of Pisarenko Harmonic Decomposition (PHD) algorithm and then compares it with multiple signal classification (MUSIC) method based on narrowband signal...
This paper discusses the design of an electronic stethoscope which is used to listen to the heart and lung sounds. The sounds are captured from the surface of the skin, after which they are filtered and amplified to enable the signal level to exceed the audible threshold. A loudspeaker is used to clearly listen to the processed signals. The signals are sampled, digitised and then analysed using the...
This paper presents a compact antenna design based on PIFA configuration with multi-band features. The present design operates over the lower and upper bands of LTE700/2600MHz, together with the existing standard of GSM1900MHz. An approach of size miniaturization and triple band characteristics was applied through the embedded slot over the radiator surface. The antenna occupies a small volume of...
This paper examines the benefits and drawbacks of these services, reviewing differences in infrastructure, power requirements, sensing devices, and other factors. Technologies covered include Radio Frequency Identification, GSM, GPS, A-GPS, Smart Antennas, Distributed Antenna Systems, Localization by Cell-ID, Localization by Prediction (Dead Reckoning method), Angle of Arrival (AOA), Localization...
In this paper, the hybrid optimisation process to predict the resonance frequencies of printed patch antennas is presented. The firefly method is used for optimisation whereas the spectral moment of method is used for modelling the antenna structure. The Fourier transform is applied to the equilateral triangle shape patch antenna with appropriate choice of basis to determine the Eigen solution to...
This paper presents a Tri-band multiple input multiple output (MIMO) antennae for Wi-Fi/WiMAX applications. The antenna consists of two radiating elements placed symmetrically. The overall dimensions of the antenna are 47 ×36 × 1.6 mm3. The separation distance between the two elements is 3mm (0.024λo). The Co-Planar Waveguide (CPW) technique is used as a feeding network. The Isolation factor is improved...
In this paper a CPW-Fed antenna loaded with CRLH-TL resonator (composite right left hand) and EBG (electromagnetic band gap) for multi-band and gain enhancement application also for miniaturization effect, the antenna contains a monopole antenna with two grounds on the top side, the antenna is loaded with a set of TL (transmission line) as inductors and capacitors. The aim of this work is to exhibit...
In this paper, a conical helical ring antenna array is proposed for detecting direction of arrival (DOA). This array is applied two angles of arrival (AOA) methods. These are minimum variance distortion-less response (MVDR) and MUSIC. The effect of mutual coupling is included on the estimation accuracy of angle of arrival. Six and eight elements ring antenna array with different spacing are studied...
The small size of the mobile terminal poses serious integration and antenna miniaturization challenges. In this work, we propose a compact dual-band dipole balanced antenna that is based on printed folded arms radiating elements. The performance of the proposed antenna has been analysed and optimised for the two targeted frequency bands in which indicates that a good impedance matching characteristic...
In this paper, a balanced dual segment cylindrical dielectric antenna (CDRA) with ultra wide-band operation is reported. First a T-shaped slot and L-shaped microstrip feeding line are suggested to furnish a balanced coupling mechanism for feeding two DRAs. Performance of the proposed antenna was analyzed and optimized against the target frequency band. The antenna cover the frequency range from 6...
Early detection of breast cancer using a radio frequency application is technically challenging, but potentially of great importance since it would be fast and cheap to implement. This paper explores an ideal ultra-wideband application for detecting tumour cancer within breast tissues using an FDTD numerical method. 1D, 2D and 3D FDTD models are investigated experimentally and the best ways of identifying...
This paper proposes an OFDM system to be used in the ECG Patient Monitoring System (ECG-PMS) for wireless telemedicine applications. The system needs a level of transmitted power at the patient site, and achieves a high BER performance at the hospital base station. This achieved by implementing a wavelet-based OFDM system that uses channel estimation based on the improved Data-Aided technique called...
This paper represents a low cost printed Vivaldi antenna at 3–10 GHz bandwidth for Radio telescope Feed system. The idea of this design is to minimize the number of telescope receivers for Square Kilometre Array (SKA) [1]. A minimized tapered slot antenna with a balun feed for receiver systems is proposed. The Vivaldi antenna is design on a relatively low dielectric constant substrate which operates...
In the past fifty years it has been clearly identified that the presence of biological tissues effect the performance of the antenna and considerable effort has been made to improve the characteristics of the mobile phone antenna's but very less effort has been put in to evaluate the effects of the radio frequency and energy absorption by the biological organisms and their effect. In this work as...
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