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PC Based Optical Salinity Sensor for Different Temperatures

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Photonic Sensors 2012年第2期2卷 187-192页

作者： Savarimuthu ROBINSON rangaswamy nakkeeran Department of Electronics and Communication Engineering Pondicherry Engineering College Puducherry-605 014India

同类，紧张用 photonic 水晶戒指共鸣器(PCRR ) 的调制咸度传感器为从 0% ～ 100% 监视海水的咸度被建议并且设计(到 100 g/L 的 0 g/L ) 在

关键词：盐度传感器温度光学 PC 强度调制输出信号环形谐振器折射率

Bridging electrical power and entropy of ONU in EPON

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Optoelectronics Letters 2021年第2期17卷 102-106页

作者： Bhargav Ram Rayapati nakkeeran rangaswamy Department of Electronics Engineering School of Engineering and TechnologyPondicherry UniversityPondicherry 605014India

This letter deliberates bridging of overall electricity power requirements of the optical network unit(ONU) with the entropy noted through the ONU state transition models considered in ethernet passive optical network(EPON). The entropy depends on the steady state and transition probabilities of data. On the other hand, the power requirements(consumption) of ONUs depend on the steady sate probability of ONUs. The potential relation derived between the entropy and electrical power reveals that they related exponentially but for their logarithmic reliance. Also, the relation is validated through the numerical simulation. The deduced relation has its importance to understand the nuances of one entity given the other.

关键词： power ONU network

Performance Analysis of Unified Failure Model for Emerging WiMAX Networks

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Wireless Engineering and Technology 2012年第2期3卷 72-76页

作者： Rajesh Anbazhagan nakkeeran rangaswamy Department of Electronics Engineering School of Engineering and Technology Pondicherry University Puducherry India

In this paper, we present a failure model for WiMAX network developed by considering the collision due to contention, unavailability of bandwidth and channel error assuming them as independent events. Using this model, the performance of bandwidth request based on contention resolution with exponential increase and exponential decrease (EIED) backoff is investigated and observed low contention efficiency with high access delay. Hence, we modify the EIED mechanism by computing the backoff factor with average contention window and estimating the response time from the transmission failure. Simulations validate the developed model with modified EIED backoff and shows better performance than conventional scheme.

关键词： WiMAX Medium Access Control Contention Resolution Backoff Mechanism

Development of Hexagonal MMR Based UWB Bandpass Filter with 5 GHz Notch Band

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Journal of Electromagnetic Analysis and Applications 2011年第8期3卷 337-341页

作者： Kaliyavarathan Thirumalaivasan rangaswamy nakkeeran 不详

This paper presents an experimental verification of ultra-wideband bandpass filter (BPF) for UWB applications and notch filter in order to suppress 5 GHz narrowband service when it coexists with UWB radio system. The BPF consists of a hexagonal shaped multiple mode resonator (MMR) with interdigital coupling at both sides. Notch filter is derived from BPF by introducing four embedded open stubs near by the MMR. The developed BPF has insertion loss of –2 dB and the minimum return loss about –35 dB, while for the notch filter they are –3 dB and –40 dB respectively. The group delay obtained for bandpass filter is below 0.2 ns and for notch filter, it is about 0.3 ns. With the above structural features the overall dimensions of the filter is 38 mm (length) × 3.2 mm (breadth) × 1.6 mm (height) and the percentage fractional bandwidth (FBW) of the proposed filter is about 120.48%.

关键词： Ultra-Wideband Mmr Bandpass Filter Notch Band Narrowband Microstrip

Development of Compact Ultra-Wideband (UWB) Microstrip Bandpass Filter

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Journal of Electromagnetic Analysis and Applications 2011年第8期3卷 333-336页

作者： Kaliyavarathan Thirumalaivasan rangaswamy nakkeeran 不详

Miniaturized Ultra-Wideband (UWB) microstrip bandpass filter with wide passband is presented. The filter is developed based on modified multiple mode resonator, which is formed by transversely attaching three pairs of non-uniform and folded stubs with lowpass and highpass sections. Both sides of high-impedance section are linked with two feed lines via direct coupled lines, resulting UWB bandpass filter. The designed filter provides 7 GHz passband between 2.5 and 9.5 GHz with approximately, –0.5 dB insertion loss, –35 dB minimum return loss at 6.85 GHz, linear phase over the passband and 110% of fractional bandwidth at –3 dB. The computed group delay variation in the passband for the filter is 0.02 ns. The overall dimension of the filter is 10.7 mm (length) × 3 mm (width) × 1.6 mm (thickness).

关键词： Ultra-Wideband Microstrip Bandpass Filter Multiple Mode Resonator Group Delay