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This paper presents the design of serial feed radiators in cylindrical lens antenna system for mobile base station application. The authors are developing a cylindrical lens antenna featuring a simple configuration compared to the present array antenna configuration. In order to achieve the cylindrical lens antenna, bifurcated beam radiation shall be produced by the feed elements. In this paper, the...
A design of Substrate Integrated Waveguide (SIW) diplexer is proposed. The diplexer is formed using two SIW circular cavity resonators designed individually and combined through a T-junction. The circular cavity structure using TM010 mode is employed in the design of this diplexer. To prove the concept, the diplexer is fabricated using Rogers RT5880 with dielectric constant, □r = 2.2 and height of...
In this paper, design of a filtenna with reconfigurable band-rejection for Ultra Wideband (UWB) communication applications is presented. The proposed antenna is a simple circular radiation patch structure with half ground plane. The band-rejection characteristics is achieved by integrating straight open stub in the feed line to overcome the interference Wireless Local Area Network (WLAN) that operated...
This paper presents a novel design of 4 GHz substrate integrated waveguide (SIW)radiating bandpass filter using multilayer technique on the Printed Circuit Board.The circular cavity structure using TM010 mode for both filter and rectangular antenna areemployed in the design of this radiating bandpass filter. To realize the technique, modes of SIW filter and microstrip antenna are coupled using rectangular...
This paper presents a free space microwave measurement methods which are non-destructive and noncontact to determine the corrosion under a thin paint on aluminium panel. For free space microwave measurements techniques, the measured parameters are reflection coefficients S11, transmission coefficients S21, dielectric constants, loss factors, and complex permittivity as a function of frequencies. This...
This paper presents design of a flood monitoring system which consists of flood detector, monitoring display and Short Messaging Services (SMS) gateway. Eagle Layout Editor 5.4 software was used to design hardware schematic diagram of the project. Graphical User Interface (GUI) display and Short Messaging Services (SMS) Gateway were developed using Visual Basic 6.0 and Ubuntu Server Edition respectively...
This paper presents a design of a multilayer bandpass filter. The filter is constructed from a combination of end-coupled and ring resonators for digital broadcasting applications. The filter is designed to work at 2.6 GHz with a bandwidth of 4%. A 0.75-mm-thick of Roger RO3003 substrate with dielectric constant, εr of 3.0 is used as a core material of the circuit. The bandpass filter was simulated...
A pseudo-elliptic bandpass filter based on two top-coupled parallel-connected ring resonators is presented. Each ring contributes to the creation of two (2) poles leading to a 4th order response of the filter. Based on the topology, two (2) transmission zeros are obtained at both sides of the passband, ensuring the high selectivity of the filter. Centered at 2 GHz with 15% relative bandwidth a proof...
Two methods for the calculation of complex permittivity of double-layer dielectric materials measured by a spot-focusing free-space measurement system have been developed. Standard materials have been used to test these methods and further works will be carried out on SiO2 wafer. The dielectric constants obtained were close to the published values. The two methods developed are Transmission Method...
This paper presents a 2.55-2.61 GHz bandpass filter using hairpin resonators in a multilayer configuration for digital broadcasting application. A combination of four-pole hairpin resonators was designed to operate at center frequency of 2.58 GHz with a bandwidth of 60 MHz. The best return and insertion losses in the passband are -23.753 dB and -2.4955 dB, respectively. The circuit was simulated using...
This paper recommends a compact circular antenna on metamaterial substrate for C-band applications. The antenna has been designed to improve the performance of gain directivity, return loss and size. The size of the new metamaterial antenna has been reduced by a factor of 2.4 and the gain directivity was increased from 4.17 dBi in conventional design on Flame Retardant 4 (FR-4) to 5.66 dBi in the...
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