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In this letter, we present a multiframe L-slot planar dipole loaded with a single microstripline for multiband antenna systems. The multiband is achieved by creating a multiframe L-slot on a host dipole and also by loading the host dipole antenna with a single microstripline to generate a couple of shunts and series of capacitive gaps with an inductive strip, eventually forming -like resonators. The antenna supports several wireless communication bands including: LTE bands at and GHz; WLAN bands at , 5.2, and 5.8 GHz; WiBro/WiMAX bands atGHz. In addition, to validate the multiband behaviors, we also proposed a simple equivalent circuit for the designed antenna in which biconical transmission lines were adopted to model the host dipole sections. The simulation, fabrication, and measurement of the proposed antenna were implemented. As a result, its reflection coefficients were found to be better than 7 dB for most operating frequencies along with a sufficiently large bandwidth and good radiation patterns.Index Terms-Dipole antennas, multiband antennas, printed antennas, slot antennas and smart antennas.

examples show a detected power of only $30 pW (i.e., À75 dBm) very close to the detection background level. As characterized, most of the losses come from the wire bending. Changing the geometry in next evolutions of the setup can eventually reduce them efficiently. Improvements are also expected both in resolution and sensitivity by using sharper needles for which high electric field enhancements are expected in the near-field [8]. 2. M. Awad, M. Nagel, and H. Kurz, Tapered Sommerfeld wire terahertz near-field Imaging, Appl Phys Lett 94 (2009), 051107. 3. R. Adam, L. Chusseau, T. Grosjean, A. Penarier, J.-P. Guillet, and D. Charraut, Near-field wire-based passive probe antenna for the selective detection of the longitudinal electric field at terahertz frequencies,ABSTRACT: A compact multiple-input-multiple-output antenna array at 700 MHz has been proposed for long-term evolution-standardized handsets. A simple shunt element-based decoupling technique has been used to realize high isolation between the strongly coupled antenna elements. The antennas with and without decoupling have been evaluated for envelope correlation coefficient, radiation efficiency, and channel capacity characteristics.ABSTRACT: In this article, computer-aided design of a broadband single balanced waveguide mixer covering full K-band (18 to 26.5 GHz) is presented. Emphasis has been given on simple design approach of the mixer using commercially available CAD (computer-aided design) tools. The mixer circuit is implemented on suspended stripline etched on soft substrate that is integrated with RF (radio frequency) and LO (local oscillator) waveguides. Conversion loss of 6-8 dB with 8.5 GHz instantaneous IF (intermediate frequency) bandwidth has been achieved with þ10 dBm LO power at 35 GHz and the RF swept from 18 to 26.5 GHz. A systematic design approach of the mixer is presented with its simulated and experimental results.

A planar slotted waveguide array antenna has been designed at 9.37 GHz for X-band radar applications. The antenna consists of multiple branchline waveguides with broadwall radiating shunt slots and a main waveguide to feed the branch waveguides through a series of inclined coupling slots. The antenna feed point is located at the center of the main waveguide. Element weights in the array have been calculated bysampling a continuous circular Taylor aperture distribution at the 25 dB sidelobe level in both the E and Hplanes. A commercially available electromagnetic (EM) simulation tool has been used to characterize the individual isolated slot and that data hassubsequently been used to design the planar array. The array is finally analyzed in a CST Microwave studio and the measured and simulated results have been found to be in good agreement.

RecQ, which encodes a DNA helicase, was selected in searching for a marker gene of Bacillus subtilis and related species via genome mining. RecQ gene sequence similarity of type strains among Bacillus species used in this study ranged from 66.2% to 96.6%, whereas orthologous average nucleotide identity ranged from 72.6% to 95.8%. According to the phylogenetic tree based on recQ sequences, each type strain of all Bacillus species or subspecies used in this study was placed in a unique taxonomic position. Four B. subtilis subspecies, Bacillus tequilensis and Bacillus vallismortis were grouped in one cluster (cluster A). Strains of B. subtilis subsp. subtilis were classified into A1 cluster, and divided into subgroups. Isolates from Natto, Japanese fermented bean food, were classified into one subgroup, whereas those from Cheonggukjang, Korean fermented bean food, were divided into several subgroups within A1. Type strains of Bacillus halotolerans and Bacillus mojavensis were grouped into another cluster (cluster B), related to cluster A. Bacillus siamensis, Bacillus velezensis and Bacillus amyloliquefaciens were grouped into an independent cluster (cluster E). Sequencing of recQ was useful for the classification or differentiation of B. subtilis and closely related species. Therefore, recQ gene can be applied to the classification of these taxa.