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Summary form only given. The characteristics of the uniplanar feed configuration to the rectangular dielectric resonator antenna based on the coplanar waveguide would be discussed. A comparative performance of the inductive, capacitive and the square loop feeds based on the coplanar waveguide would be addressed. It is observed that the capacitive feed to the antenna exhibits dual resonance with comparable...
In this paper the analysis and design of compact CPW-fed slot antenna that operates in the IEEE 802.11a frequency band from 5.15 GHz to 5.35 GHz for wireless applications through a single grounded coplanar waveguide port for achieving sectorized radiation pattern is presented. The antenna is designed on a RT/duroid 5880 substrate with a permittivity 2.22 and with the size of 18.8 mm times 12.3 mm...
Summary form only given. Microwave technology was considered as a war time secrecy initially and it was just after the golden period (1935-1945) of Microwaves, its applications started encompassing the non-military fields as well. Since then, the entire Microwave field has undergone tremendous revolution and gone through a ses change. The first planar transmission line dasiaStrip transmission linepsila...
Conformal mapping has been used extensively for the design of planar lines. However, this approach needs to be improved for the design of CPS. Two different approximations have been used in this connection; duality between CPW and CPS, and partial capacitance approach. The validity of these assumptions is investigated in this paper. Conformal mapping method is combined with FEM to determine epsivre...
Artificial neural networks (ANNs) have been promising tools for many applications. In recent years, a computer-aided design approach based on ANNs has been introduced to microwave modelling, simulation and optimization. In this work, the characteristics parameters of edge coupled coplanar waveguides (CPWs) have been determined with the use of models. These neural models were trained with LM, BR, QN,...
A dual band RFID applications in 800 - 900 MHz and 2400 MHz band is presented. The Asymmetric Coplanar Strip (ACS) fed antenna consists of inverted L shaped monopole with a capacitive loading to provide necessary impedance matching and current distribution. The antenna has wide bandwidth from 790 MHz to 1050 MHz and from 2350 MHz to 2640 MHz coving the RFID UHF and Microwave frequencies. The uniplanar...
This paper presents the design and RF characterization of micro electromechanical system (MEMS) switches realized on elevated coplanar waveguide for high-speed applications. The capacitive air gap between signal line and the cantilever is 1 um. The lowest actuation voltage obtained is 6 V. The insertion loss of switch and its associated transmission line is -0.31 dB (mainly contributed by the transmission...
Neural networks recently gained attention as fast and flexible vehicles to microwave modeling, simulation and optimization. After learning and abstracting from microwave data, through a process called training, neural network models are used during microwave design to provide instant answers to the task learned. This paper presents simple and accurate ANN models for the analysis and synthesis of CPS...
In pulse shaping circuits, a transmission line having characteristics of higher impedance, fast transition, low insertion loss is needed. Elevated Coplanar Waveguide (ECPW) has been identified as the transmission line to achieve such characteristics. An equivalent circuit model for ECPW based on the S-Parameter approach is proposed and the RF performance is obtained. The proposed model reveals that...
In most devices on printed circuit boards (PCBs), there are many types of micro strip transmission line and coplanar waveguide (CPW) discontinuities, such as steps, air gaps, bends, etc. These discontinuities have strong effects on the signal transmission and reflection. In certain cases, this disruption of the normal fields of the line result in current crowding leading to storage of magnetic energy,...
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