Stub (electronics)

About: Stub (electronics) is a research topic. Over the lifetime, 8172 publications have been published within this topic receiving 75018 citations.

Combined mine probe and marker

Abstract: A combined probe and marker for probing mines as well as marking mines oncehey have been discovered, and marking a path free of mines, comprises a rod rigidly connected to a handle. At the upper end of the handle, there is a recess for frictionally holding a Combat Light Device. In another version of this invention, the handle has a central bore followed by a concentric threaded bore at the lower end of the handle. The rod is affixed to one of the threaded ends of a stub which has a middle enlarged section for removably attaching and storing the rod.

A New Wide-Stopband Low-Pass Filter with Generalized Coupled-Line Circuit and Analytical Theory

Abstract: A generalized coupled-line circuit is introduced to construct a wide-stopband low-pass fllter in this paper. This circuit conflguration includes two-section coupled lines and a connected transmission-line stub. Due to the symmetry of this proposed structure, closed-form equations for scattering parameters are investigated. The transmission zeros and poles locations for difierent circuit parameters are discussed, and the corresponding design curves are given. For theoretical veriflcations, four typical numerical examples are designed, calculated and illustrated. Furthermore, two single-stage low-pass fllters (LPF 1 and LPF 2) with the 1-dB cutofi frequencies of 0.72GHz and 1.45GHz are fabricated and measured. The implemented LPF 2 has 19-dB stopband rejection in the range of 2.05 to 6.36GHz. Finally, two LPF cells (LPF 1 and LPF 2) and an additional connected transmission line are used to construct a new two-stage low-pass fllter (LPF 3) with extended stopband. The measured 16-dB stopband of LPF 3 is up to 7.5GHz while the 1-dB passband range is from DC to 0.67 GHz. The advantages of this proposed low-pass fllter are avoiding any lumped elements and compact layout structure.

A 5.8-GHz Band Highly Efficient 1-W Rectenna With Short-Stub-Connected High-Impedance Dipole Antenna

Abstract: This article describes a 5.8-GHz band highly efficient 1-W rectenna that consists of a bridge diode, directly connected to a short-stub-connected high-impedance dipole antenna, with a designed antenna resistance of $580~\Omega $ . The proposed antenna topology realizes circuit functionalities of impedance transform, impedance matching, harmonic reaction, and dc blocking while maintaining a high antenna radiation efficiency. Lossy circuit components between the antenna radiator and the bridge diode can be eliminated for a highly efficient rectification. In experimental investigations, the measured rectification efficiency of the 5.8-GHz band rectifier is 92.8% at an input power of 1 W, and the estimated antenna radiation efficiency from the measured antenna gain is 96.9%, including loss due to circuit functionalities and interconnection. With lesser additional losses, the proposed antenna can be integrated with circuit functionalities to achieve a highly efficient rectenna. The measured rectification efficiency is almost the same as the fundamental limitation restricted by the rectifier diodes’ performance.

Method for repairing and producing integrally bladed rotors for a turbine or turbo engine

Abstract: A method for repairing/manufacturing an integrally bladed rotor for a turbine or turbo engine, in which, in the case of a repair, at least one vane section to be replaced is removed leaving a stub section to which a replacement vane section is to be welded, and, in the case of manufacturing, a carrier to be provided with vanes has stubs projecting over its peripheral surface, to each of which a vane is to be welded, includes the steps of: arranging an inductor around the front face of the stub section or stub; positioning a replacement vane section or vane at a small radial distance from and aligned with the stub section or stub; and welding the replacement vane section or vane to the stub section or stub, respectively, in a protective gas atmosphere by exciting the inductor with high-frequency current and moving the opposing heated part surfaces together.

Sensing Application in Fano Resonance With T-Shape Structure

Abstract: A T-shape plasmonic structure, consisting of a stub resonator coupled with bus waveguide and cavity, has been investigated numerically and theoretically. Due to the near-field coupling mechanism between bright and dark modes, plasmon induced transparency can be observed in transmission spectrum. Moreover, it is demonstrated theoretically that the first order resonance mode can exist or not in the cavity by adjusting lateral displacement ( S ), which leads to the appearance or disappearance of the narrow transmission dip together with a steep Fano resonance in reflection spectrum. The effects of different parameters on a figure of merit (FOM) are investigated in detail. In sensing applications, the T-shape structure yields a sensitivity of ∼1090 nm shift per refractive index unit and a FOM of 33340. The results indicate that the width of cavity ( w c) is more sensitive than the distance ( g ) and length ( L ) for FOM. The transparency and Fano resonance effects may have potential applications in optical switch, slow-light devices, and nano sensor in highly integrated optical circuits.