Enhancement Performance Of Split Ring Resonator Structure On Microstrip Patch Antenna

Metamaterial is a type of artificial structure that is not found in the nature. This structure has become an interest among many due to its extraordinary response to electromagnetic waves. The split ring resonator is an example of a metamaterial structure, which has the potential to improve the performances of components in microwaves without changing the materials or with additional radiators. First, the possibility to reduce the size of patch antenna while maintaining the acceptable performance at 2.4 GHz with various split ring resonator configurations studied. Next, the ability to produce multi bandwidth performance for Minkowski Island antenna with Minkowski Island split ring resonator had performed. The antenna had designed and simulated with Microwave CST software. Then, the proposed antenna had been fabricated and measured. Meanwhile, the Minkowski Island split ring resonator possessed the ability to reduce the overall physical size of Minkowski patch antenna up to 75.6 % compare with basic rectangular antenna. Then, the Minkowski Island split ring resonator could create multiband resonant frequency at 2.4 GHz, 3.5 GHz, and 5.2 GHz for the Minkowski Island antenna with return loss of - 21.945 dB, - 17.154 dB and - 16.536 dB with gain of 0.874 dB, 1.410 dB and 2.940 dB, respectively. Besides, the resonant frequency could also be controlled by using different combinations size and location of Minkowski Island split ring resonators. The overall size of the antenna still could be maintained although additional split ring resonators were used. Therefore, the multiband system with compact design can be realized to improve the mobility of wireless communication system devices

Rhombic Split Ring Resonator (R-SRR) Structure on Rectangular Patch Antenna Design

Abstract- This work focusing on the effect of the complementary rhombic split ring resonator (R-SRR) structure of gain, return loss and the radiation pattern the rectangular patch antenna design. The basic rectangular patch antenna design had been simulated in CST Microwave Studio simulation software. Then, the single unit of the R-SRR had been added into the patch antenna design. The targeting frequency of this antenna is 2.40 GHz for Wireless Local Area Network (WLAN) application. Compared with the conventional microstrip patch antenna with the same aperture size, the performance gain of the patch antennas is improved obviously and suitable for targeting frequency of 2.40 GHz. The parametric studies done this work work are the different variation pattern of R-SRR, different distance between two RSRR structure and different size of R-SRR

Dual Band Printed Bow-Tie Antenna For WLAN/WIMAX Application

In this paper a dual band printed bow-tie antenna for WLAN and WiMAX application has been presented. A planar bow tie antenna consists of defected ground and symmetrical shape split ring resonator (SRR) is presented to apply to the dual band application. A triangular microstrip patch with the defected ground is used as initial bow tie antenna which worked on WiMAX Band. Further initial design (primary antenna) added with SRR to operate over 2.4-2.8 GHz for Bluetooth, Wi-Fi, ZigBee, WLAN Applications and 3.4-4.2 GHz which includes Worldwide Interoperability for Microwave Access (WiMAX) and C-band down link frequency band for satellite communications. The proposed antenna has been made on 1.6 mm thick FR-4 substrate with a size of 50x28 mm2. The proposed antenna has very wide bandwidth with the value of VSWR less than 2

The Effect of Gate-Induced Drain Leakage (GIDL) on Scaled MOSFETS of Low Power Consumptions

This project is aimed to study the impact of GateInduced Drain Leakage (GIDL) on scaled Metal-OxideSemiconductor Field-Effect Transistor (MOSFET) for low power efficient application. The MOSFET is operated with low power consumption. Microchip industries are undergoing an evolution where the size of a device is getting smaller, but the performance is great. Thus, this project studies the leakage mechanism in terms of the GIDL current on MOSFET that operates for low power and its physical size had been reduced. The output of this project will determine on what is the implications of GIDL on the performance of MOSFET with various sizes that been supplied with low voltage power. The characteristic of GIDL was studied and from those characteristics, MOSFET design parameters were proposed by referring to the International Technology Roadmap for Semiconductors (ITRS), 2011 edition. DEVEDIT and Atlas application in Silvaco TCAD software was used in this project. Three MOSFET with different physical gate length and several other parameters were designed in DEVEDIT application, then being simulated for data extraction in Atlas application. From the data extracted, it shows that as the size of MOSFET physical gate length become smaller, the leakage current tends to be higher. Apart from GIDL current (IGIDL) value, the “ON” current (ION) value and threshold voltage (VTH) value also been extracted for all MOSFET designs

An Investigation of Switchable Matched Bandstop to Bandpass Filter Based on Lossy Resonator

Filters are the basic component of transceivers and receivers in the RF front-end communication system, either as band reject or band select units. This research is about an investigation of the new switchable filter which is can switch from matched bandstop to bandpass filter based on lossy resonator, where the lossy resonator topology can be used to partially compensate for the loss. The aim of this research work is to investigate the switchable matched bandstop to the bandpass filter response using lossy resonator based on EM modeling. This filter will be realized in parallel-coupled L-shape resonator. A PIN and varactor diodes will be used to make the filter switchable. This switchable filter provides two modes of operation; matched bandstop and bandpass response. The operating frequency is 2.4 GHz. The theoretical analysis together with EM modeling of the new switchable matched bandstop to bandpass response are presented in this paper

Investigation of Minkowski Patch Antenna with Meander Line Split Ring Resonator (ML-SRR) Structure

Abstract—The objective of this paper is to investigate the effect of the meander line split ring resonator on the modified Minkowski patch antenna. In this work, a modified Minkowski patch antenna with meander line split ring resonator (ML-SRR)and quadruple-P shaped split ring resonator (QPS-SRR)structure is presented. This proposed modified patch antenna with SRRs structures achieved remarkable 2.644 dB of gain at the frequency of 2.402 GHz compared to the normal Minkowski antenna without SRR structures with only 2.348 dB. This antenna had been simulated in the CST Microwave Studio simulation software

Design Minkowski Shaped Patch Antenna with Rectangular Parasitic Patch Elements for 5.8 GHz Applications

Abstract—This paper presents the parametric study on the Minkowski shaped antenna with the rectangular parasitic patch elements. This patch antenna consists four parts – patch, feed line, ground plane and parasitic elements. The rectangular parasitic patch elements are located at the bottom of the Minkowski shaped patch. The parametric study of different patch sizes (Design 2A, Design 2B, Design 2C, Design 2D and Design 2E) is presented in this paper. The antenna parameters studied in this paper are resonant frequencies, return loss at the resonant frequency, bandwidth and realized gain. The target frequency of this antenna is 5.80 GHz for Worldwide Interoperability for Microwave Access (WiMAX) application. It shows the return loss of – 24.477 dB, bandwidth of 254 MHz (5.676 GHz to 5.930 GHz) and a gain of 2.351 dB. Index Terms—Minkowski; patch antenna; gain; return loss; bandwidt

Wireless Electrical via Electromagnetic Induction

Wireless Electricity transmission or wireless power transmission is a process that takes place in any system, where electrical energy is transmitted from a power source to an electrical load without interconnecting wires. The traditional ways using electric power cables and electric batteries are often not satisfactory for mobile devices as the use of plugs and wires will limit the mobility. Therefore, the objective of this project was to build and demonstrate the concept of wireless power transfer at relatively large distances based on magnetic induction coupling between electromagnetic resonant objects. It consists of a transmitter as an electromagnetic resonator and a receiver to which the device to be powered was attached. The transmitter emits a non-radioactive magnetic field resonating at MHz frequencies, and the receiving unit resonates in that field. The maximum voltage absorbed by the receiver load was 10V at 0 distances and decreased to 0.567V at 6 cm distance. From the experiment, the receiver had the voltage of 2.582V for input current 3A, 1.356V for input current 1A and 0.678V for input current 500mA at 0 distances. The basic principle adopted was using two coils having the same magnetic resonance, in which one was coupled to the source and the other one was coupled to a device. However, the short distance between the two coils and the large coil size that used more space created a problem. Thus, the number of turns of coil with better quality of copper wire and input current source can be increased to improve the strength of the magnetic field. This is because when the strength of the magnetic field increases, the distance between the two coils can be longer, while the smaller size of coil can be used to reduce space

Compact Circular Polarized Antenna Design with H-Shaped Slots and Stair Notches for Wireless LAN Application of 2.4 GHz

This paper presents the design of a circular polarized antenna for wireless communication system. Firstly, the linear polarization antenna is simulated in the CST Microwave Studio. This linear polarization antenna is designed by using double H-shaped slots, coplanar waveguide (CPW) and stair notches at the patch techniques. Then, the truncated corners at the patch are designed to create a circular polarization antenna. The dimension of this circular polarization antenna is 28 mm width x 33 mm length. Both antennas are designed for a single frequency operation band at 2.4 GHz. The return-loss performance of the circular polarized antenna is - 46.785 dB and – 39.758 dB for each simulation and measurement respectivel