A novel Method for mounting Gunn Diode in Active Slot-Ring Antenna

An Active Slot-Ring Antenna (ASRA) has been studied through experiments and analysis in order to find the optimum location of the active device so that the best performance in antenna characteristics is realized in terms of power radiated and power received. Analyses have been carried out in terms of equivalent {ABCD} matrix parameters. Radiation pattern and locking characteristics of the ASRA have been measure and presented in support of the analytical methods. Keywords: Active Slot-Ring Antenna (ASRA), Gunn diode, Bias tuning, Radiation pattern

A Study on Active Microstrip Circular Patch Antenna

A two/three terminal active device integrated with a microstrip circular patch antenna is known as an Active Microstrip Circular Patch Antenna. In case of active antenna maximum possible radiated power can be realized when i) the generated power is maximized and ii) the radiator is matched to the intrinsic impedance of free space. To provide the best radiation performance a new relation based on nonlinear interaction between the device and circuit has been developed in this paper. Theoretical result verified with the experimental proofs. Keywords: Active Microstrip Circular Patch Antenna, Gunn Diode, Radiation Pattern

Search for jet extinction in the inclusive jet-pT spectrum from proton-proton collisions at s=8 TeV

Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published articles title, journal citation, and DOI.The first search at the LHC for the extinction of QCD jet production is presented, using data collected with the CMS detector corresponding to an integrated luminosity of 10.7  fb−1 of proton-proton collisions at a center-of-mass energy of 8 TeV. The extinction model studied in this analysis is motivated by the search for signatures of strong gravity at the TeV scale (terascale gravity) and assumes the existence of string couplings in the strong-coupling limit. In this limit, the string model predicts the suppression of all high-transverse-momentum standard model processes, including jet production, beyond a certain energy scale. To test this prediction, the measured transverse-momentum spectrum is compared to the theoretical prediction of the standard model. No significant deficit of events is found at high transverse momentum. A 95% confidence level lower limit of 3.3 TeV is set on the extinction mass scale

Searches for electroweak neutralino and chargino production in channels with Higgs, Z, and W bosons in pp collisions at 8 TeV

Searches for supersymmetry (SUSY) are presented based on the electroweak pair production of neutralinos and charginos, leading to decay channels with Higgs, Z, and W bosons and undetected lightest SUSY particles (LSPs). The data sample corresponds to an integrated luminosity of about 19.5 fb(-1) of proton-proton collisions at a center-of-mass energy of 8 TeV collected in 2012 with the CMS detector at the LHC. The main emphasis is neutralino pair production in which each neutralino decays either to a Higgs boson (h) and an LSP or to a Z boson and an LSP, leading to hh, hZ, and ZZ states with missing transverse energy (E-T(miss)). A second aspect is chargino-neutralino pair production, leading to hW states with E-T(miss). The decays of a Higgs boson to a bottom-quark pair, to a photon pair, and to final states with leptons are considered in conjunction with hadronic and leptonic decay modes of the Z and W bosons. No evidence is found for supersymmetric particles, and 95% confidence level upper limits are evaluated for the respective pair production cross sections and for neutralino and chargino mass values

Rice production technology manual

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