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Proceedings ArticleDOI

Design of CPW wide slot antenna with tuning stub for wideband applications

17 Dec 2010-pp 2198-2201
About: This article is published in International Conference on Control, Automation and Systems.The article was published on 2010-12-17. It has received 6 citations till now. The article focuses on the topics: Stub (electronics) & Wideband.
Citations
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Book ChapterDOI
28 Mar 2012
TL;DR: A compact low profile microstrip patch antenna suitable for Global System for Mobile Communications (GSM) and Worldwide Interoperability for Microwave Access (WiMAX) applications is presented and exhibits omni-directional radiation patterns with reasonable gain on all operating frequency bands.
Abstract: This paper presents a compact low profile microstrip patch antenna suitable for Global System for Mobile Communications (GSM) and Worldwide Interoperability for Microwave Access (WiMAX) applications. FR4 epoxy is used as substrate with relative permittivity 4.4 and tangent loss 0.02. The prototype contains slots, shorted pin, partial ground, tuning stub and dual feeding techniques. Parametric analysis has been carried out to observe the effects of techniques. Simulation results show that antenna has enough impedance bandwidth to cover the desired frequency bands. The prototype is fed using transmission line. Antenna exhibits omni-directional radiation patterns with reasonable gain on all operating frequency bands. Characteristic analysis and simulation of prototype was done using Ansoft HFSS (High Frequency Structure Simulator).

18 citations

Proceedings ArticleDOI
17 Dec 2010
TL;DR: Based on D-partition method, a fast calculation approach for PI controller stable region is introduced in this article, which can be applied to any self-stable systems with or without time-delays, while only the process frequency responses are needed.
Abstract: Based on D-partition method, a fast calculation approach for PI controller stable region is introduced. The boundary of the PI stable region is calculated first using D-partition method, and then several sets of equations and inequalities are introduced sequentially to judge which side of the boundary is stable. The approach is simple, and can be applied to any self-stable systems with or without time-delays, while only the process frequency responses are needed. To illustrate its feasibility, some examples are given.

11 citations

Proceedings ArticleDOI
06 Apr 2014
TL;DR: In this paper, a multiband coupled on-board printed handset antenna capable of providing wideband operation for GSM 1800/1900, UMTS and LTE 2300/2500 is presented.
Abstract: A multiband coupled on-board printed handset antenna capable of providing wideband operation for GSM 1800/1900, UMTS and LTE 2300/2500 is presented. Antenna consists of coupling monopole resonators which are extended from the feed and main ground plan to accommodate integration with circuit board of mobile handset. Antenna can easily be fabricated with the help of extended line and ground without disturbing main circuit board of handset, considering the presence of protruded components over circuit board. The antenna design uses fork-shaped monopole coupling resonators extended from active element and ground plane. These resonators along with prolonged length from patch and ground, as a function of resonating wavelength, control the bandwidth of antenna. Monopoles driven from patch and ground contribute the lowest and higher order resonant modes to form three wide operating bands centered at about 1800, 2500 and 5200MHz to cover GSM1800/1900/UMTS/LTE2300/2500. The results of this study confirmed that extended planner monopoles couple to form lower and higher resonant modes. This study provides new understanding on coupling monopole resonators and their application in handset antenna designing.

5 citations

Proceedings ArticleDOI
17 Dec 2010
TL;DR: Based on desired dynamic equation (DDE), a kind of PI controller tuning method is discussed in this article, where the stable region of controller tunable parameter is calculated and compared with traditional PI controller, and then the necessity of introducing a scaling factor L is explained for better control performance.
Abstract: Based on desired dynamic equation (DDE), a kind of PI controller tuning method is discussed in this paper. Using Nyquist stability criterion, the stable region of controller tunable parameter is calculated and compared with traditional PI controller, and then the necessity of introducing a scaling factor L is explained for better control performance. The DDE-based PI tuning method is applied to a gasifier temperature control. The simulation results show its feasibility with lower tuning efforts and better performance.

3 citations

01 Oct 2010
TL;DR: The authors of this paper have thought over of developing such interface to open up benefits from VLSI design to control and automation domain and the issues and considerations for developed such interface are discussed.
Abstract: Today’s machine automation systems are demanding for better throughput, faster response, built in safety features and high speed communication support, besides satisfying IEC61131-3 control specification. MEMS sensors & actuators along with increased control logic complexities are stretching limits of conventional Programmable Logic controllers (PLCs) generally used for industrial and high end application control. This is because PLCs are implemented using sequential controllers. Throughput, response time, complex operation and flexible expansion in such case get limited due to typical fetch, decode and execute cycle. Field programmable Gate Arrays (FPGAs) which architecturally can satisfy these requirements, are proposed in the literature as prospective devices to implement PLCs. However, these devices have not been commonly accepted by control & automation industry. One of the important factors is difficulty in understanding FPGA design flow and its design specification standard. Currently, there is no proven interface available in the market to bridge between IEC control specification and FPGA design specification. Authors of this paper have thought over of developing such interface to open up benefits from VLSI design to control and automation domain. The issues and considerations for developing such interface are discussed in this paper. As this is multidisciplinary work, and not much work has been done in this area, possible research opportunities are discussed along with validation platform considerations.