A curvature sensor based on a polarization-dependent in-fiber Mach-Zehnder interferometer (MZI) is proposed. The MZI fabricated by core-offset fusion splicing one section of polarization maintaining fiber (PMF) between two single mode fibers (SMFs). Two independent interference patterns corresponding to the orthogonal modes for PMF are obtained. couple efficiency core and cladding decreased with increasing bending part. variation part can be obtained detecting fringe visibility patterns....

A millimeter-wave frequency-scanned antenna based on continuous transverse stubs applications is presented in this communication. The waveguide CTS radiation slots are fed by a wideband quasi-TEM linear source generator (LSG). To increase the scanning angle, nonuniform slow-wave structure employed underneath to control amplitude and phase distributions. LSG constructed of parallel-plate excited modified three-stage 1-to-8 power divider, generating high-quality wave over wide frequency band....

This letter presents a millimeter-wave (mmW) continuous transverse stub (CTS) leaky-wave antenna (LWA) with pencil-beam broadside radiation, high scanning-rate, and low sidelobe levels (SLLs) characteristics. A parallel-plate waveguide (PPW) meander delay line is employed to control the phase constant of proposed LWA. By adjusting length electromagnetic TEM-mode PPW line, difference between adjacent radiating elements can be altered, achieving flexible scanning-rate. Match stubs close...

This paper presents a new type of continuous transverse stub (CTS) antenna array with novel linear source generator (LSG). The conventional multilayer parallel-plate waveguide (PPW) feed and pillbox structure are eliminated replaced more compact partially corporate network. helps to achieve lower profile (or reduction layers) high performance broadband efficiency. For validation, two prototypes demonstrated-one based on hollow waveguides operating at 34-41 GHz (Array-I) the other substrate...

This article presents a Ku-band full-corporate-feed dual linearly polarized (LP) hollow-waveguide (HW) septum antenna array. A modified low-profile polarizer, worked as the radiating element, is designed to push radiation nulls out of desired passband upon odd-mode excitation, which helps achieve stable and consistent performance for both H-pol V-pol. Square coaxial lines are employed realize two sets full-corporate feeding networks with compact size, enabling close spacing between adjacent...

An all-metal phased array with full polarization reconfigurability is presented in this article. Septum polarizers as elements are first used to achieve left-handed and right-handed circular polarizations (LHCP RHCP), arbitrary linear (LPs) can be further synthesized. Two pairs of metal ridges loaded into the septum polarizer reduce profile aperture size so that spacing between two adjacent constrained about half free-space wavelength at center operating frequency. Phased arrays...

A millimeter-wave 45° linearly polarized corporate-fed slot array antenna is presented in this communication. key feature the much reduced number of metallic layers and, therefore, complexity array, as compared with other competitive designs. With profile, high cross-polarization discrimination (XPD) and low sidelobe level (SLL) are still achieved by a combination techniques. The back cavity 2 ×2 subarray optimized to confine H-field along direction radiation slots, enhancing its XPD. Stubs...

This letter presents a high-gain 32 × 32-element full corporate-feed array antenna using simplified assembly of only two split blocks. is made possible by new feeding configuration which eliminates the cavity-backed layer used in conventional designs. E-plane T-junctions, as well single-ridge waveguide output structure, are network to reduce its size. helps realize one-to-one corresponding excitation between port feed and radiation slots. In addition, transition structure from double-ridge...

This article presents a <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$K$ </tex-math></inline-formula> -band high gain monopulse variable inclination continuous transverse stub (VICTS) antenna for satellite-aided vehicular communications. The radiating part is divided into four regions and fed by an air-filled single-layer E-plane waveguide comparator cascaded with two groups of mirror-symmetric...

The effect of austenitizing temperature on the microstructures and -20 ¤ impact toughness HSLA100 steel was investigated by Gleeble-3500 thermal simulator.Its were observed SEM EBSD, relevant transformation kinetics also analyzed means dilatometer.The results show that microstructure changes gradually from granular to lath bainite with increasing temperature.The highest samples achieved at 1000 ¤, in which martensite-austenite (M/A) islands are finer dispersed density high angle boundaries...

This letter introduces a new <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">K-/Ka</i> -band diplexer-integrated simplified rotary joint. The stator and rotor are arranged to construct guided-wave structure based on gap waveguide (GW) technology, which supports stable rotation without leakage. A bandpass filter (lower band channel) two-path high-pass (upper designed the form diplexer enable wideband dual-band operation. coaxial probe-based...

This letter presents a continuous transverse stub (CTS) array antenna with high aperture efficiency, low sidelobes, and cross-polarization characteristics over an E-band. The consists of full-corporate-feed 32-slot CTS 45° linear polarizer. A multiple-aperture excited parallel-plate waveguide structure works as source generator to generate the quasi-TEM wave uniform amplitude distribution whole operating band from 71 86 GHz. polarizer contains two layers slots, shifting polarization...

This letter presents a wideband high performance 45° linearly polarization 8 × 8-slot array antenna. The gap waveguide technology is utilized to realize the proposed antenna, so that electromagnetic (EM) leakage among metallic blocks can be cancelled. 2 4-slot subarrays are used construct An additional cavity power divider layer inserted between layers of original dividers and radiation slots balance amplitude phase distributions in frequency band. suppresses grating lobes. Triangular loaded...

This article presents a Tx/Rx dual-band combined-aperture variable inclination continuous transverse stub (VICTS) antenna for low-earth-orbit (LEO) satellite-on-the-move (SOTM) applications. The beam directions the Tx and Rx bands are kept consistent during scanning, so that allows duplex link. topology of VICTS is derived from requirement directions. Nonuniform slow wave structures (SWSs) used to achieve required phase difference phase-changing rate (PCR) between radiation slots in two...

This article presents a dual-band shared-aperture variable inclination continuous transverse stub (VICTS) antenna with large beam coverage for both frequency bands. A novel hybrid radiating structure is introduced to enable approximately consistent initial direction at the boresight bands and therefore coverage, by exciting different sets of radiation elements each two The formed interlaced conventional CTS those backed double-ridge waveguide slots. latter suppresses lower band while...

Multiview video coding (MVC) is a key technology in free-viewpoint television. MVC based on traditional existing codec system has been studied widely, but all of them need powerful computational capacity processing. Parallel process can facilitate the efficient implementation encoder and decoder required as function by MPEG. In this paper, parallelization methodology for hyper-space theory presented tested local area multi-computer - message passing interface (LAM-MPI) parallel platform...

This communication introduces a Ku-band differentially-fed dual-polarized antenna array (DPAA) using structural composite transmission line (SCTL) network. The element is excited by new hybrid differential structure with dumbbell slot and two L-shaped probes, which generates radiation high isolation cross-polarization discrimination (XPD). substrate integrated waveguide (SIW) the power divider based on delay microstrip constitute SCTL, directly cascaded SCTL-based feeding A two-dimensional...

Abstract This letter presents a Ku‐band horizontally polarized (HP) omnidirectional antenna based on single‐ridge trapezoidal waveguide (STW). Four groups of longitudinal slots are etched pair back‐to‐back arranged STWs to achieve the HP radiation performance. The number and distribution each slot group optimized reduce gain variation. An out‐of‐phase stripline power divider cascaded with two probe‐based vertical dividers is used excite all radiating in series‐parallel hybrid structure,...