ACES Publication Search
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| Title: | ACES Express Journal September 2016 Cover |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 9 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 1796 KB |
| Title: | ACES Express Journal September 2016 Front/Back Matter |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 9 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 36 KB |
| Title: | ACES Express Journal September 2016 Full |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 9 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 4374 KB |
| Title: | Capacitance Extraction for Microstrip Lines Using Conformal Technique Based on Finite-Difference Method |
| Abstract: | In this paper, a novel method using conformal technique of finite-difference method (FDM) is proposed to capacitance extraction of microstrip lines. Instead of deriving the average dielectric constant ?, this method uses electric field numerical weights to process the inhomogeneous cells, and takes the discontinuous effects of both inhomogeneous Ampere cell and Faraday cell into account. Besides, a new boundary condition is proposed, where the cells obeying exponential distribution are added at boundary. The new method shows good agreement with the measurement and traditional methods. |
| Author(s): | Y. Sun, X. Wang |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 9 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 1882 KB |
| Title: | Ultra-Wideband Microstrip Antenna for Body Centric Communications |
| Abstract: | A novel low profile reconfigurable wide band microstrip antenna for impulse radio ultra-wideband (IR-UWB) WBANs and targeted for on-body sensor node has been introduced. The printed monopole antenna consists of a heart shaped radiating patch and an elliptical ground plane. This antenna has a frequency bandwidth of 130% with a VSWR of 1.5 and average gain is about 3.6 dBi. There is a slot on the patch which is loaded by two varactor diodes to form a tunable notch band. The antenna operates from 2.4 GHz to 12 GHz. The proposed antenna is a good candidate for medical purpose since it has a sufficient amount of gain and bandwidth. We used active circuit to increase the flexibility of setting rejection band to prevent having interference from other sources such as Wi-Fi. The antenna is fabricated and there is a good agreement between the simulation and measurement results. |
| Author(s): | A. Darvazehban, T. Rezaee |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 9 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 1530 KB |
| Title: | A Simple Analytical Method to Calculate Bending Loss in Dielectric Rectangular Waveguides |
| Abstract: | We present a simple analytical method to compute attenuation in bent dielectric rectangular waveguides. An approximate formulation for the attenuation constant is first derived by determining the ratio of average power loss per unit length to the average power propagating along the waveguide. Since the waveguide has been simplified into a slab in the process of derivation, losses at the four edges of the structure have been neglected. To account for these losses, the perturbation theory has been employed. The total loss is found to agree closely with that obtained via the Finite Element Method (FEM). Unlike the FEM which requires considerable computational time and power to solve, we demonstrate that the analytical method proposed here can easily be applied and it gives sufficiently accurate result. |
| Author(s): | K. H. Yeap, A. W. C. Tan, K. C. Lai, H. Nisar |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 9 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 1455 KB |
| Title: | Ultra-Wide Bandwidth Enhancement of Single-Layer Single-Feed Patch Antenna Using the Theory of Characteristic Modes |
| Abstract: | The Theory of Characteristic Modes (TCM) is proposed as a systematic approach to antenna design to achieve the goal of finding the antenna structure with optimum broadband behavior. This theory provides a physical insight to the radiating nature of microstrip patch antennas and reduces the design optimization time. In this work, the resonant behavior of the highly radiating structure of the single U-slot rectangular patch on a single-layer ?r = 4.4 substrate is analyzed using TCM. Modal analysis of this single-layer structure with different single feed excitations concludes that VSWR ? 2 impedance bandwidth in the order of 96% can be achieved with a single T-probe feed. Experimental results, included here, show VSWR ? 2 impedance bandwidth in the order of 71%. |
| Author(s): | M. M. Elsewe, D. Chatterjee |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 9 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 1411 KB |