Stub (electronics)

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

A novel miniaturized UWB antenna with four band‐notches

Abstract: In this article, an effective design method is presented to design a miniaturized UWB antenna with four band-notches. By carefully integrating C-shaped slots, L-shaped open circuit stub, and T-shaped parasitic strip onto the primitive miniaturized antenna, four band-notches (VSWR > 2) could be achieved at 3.38–3.65 GHz, 4.95–6.05 GHz, 7.42–7.78 GHz, and 8.1–8.9 GHz to reject WiMAX, WLAN, X-band satellite communication, and ITU 8 GHz band signals. Simulated and measured results show that this antenna could operate from 3.15–11.1 GHz (VSWR < 2), and maintain omnidirectional directivity patterns at H-plane. Moreover, the proposed antenna has a very compact size of 18.6 × 22 × 1.5 mm3. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1202–1206, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27546

Modular encapsulated cross-connect terminal unit

Abstract: A terminal unit which is both modular and encapsulated is disclosed. The cable stub and cross-connect blocks are connected to the unit. The unit contains hinged panels on which the cross-connect blocks are mounted. The stub pairs are wired to the rear of the blocks. The rear of the blocks and the base wherein the cable stub enters the unit are then encapsulated. The assembled encapsulated modular unit may then be installed in a suitably arranged terminal enclosure.

Adjusting a characteristic of a conductive via stub in a circuit board

Abstract: A circuit board construction which reduces unwanted electrical effects and lower signal quality resulting from the use of vias in relatively thick circuit boards or in circuit boards carrying signals of relatively high frequency. The circuit board includes a through-hole in the circuit board substrate for carrying a conductive via stub, the stub having an inherent stub characteristic; and a compensation element, such as a surface mount capacitor, positioned on the substrate such that when the stub is carried by the through-hole the inherent stub characteristic is adjusted to define a compensated stub characteristic.

A compact quad‐band band‐pass filter using novel stub‐loaded SIR structure

Abstract: A compact quad-band band-pass filter (BPF) based on a novel stub-loaded step-impedance resonator (SL-SIR) is analyzed and designed in this article. The proposed SL-SIR, which is found to have the advantages of introducing four narrow passbands and providing more degrees of freedom to adjust the resonant frequencies, is investigated by using even/odd mode analysis. A prototype of a quad-band BPF centerd at 1.5, 2.5, 3.5, and 5.2 GHz is designed and fabricated. The simulated and measured results are in good agreement with each other. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:538–542, 2014

Design and Development of an Inexpensive Sub-Nanosecond Gaussian Pulse Transmitter

Abstract: A design of a hybrid Gaussian pulse transmitter using a transistor-based pulse generator and two pulse-shaping networks, a shorted stub delay circuit and a 90° hybrid coupler, is presented. A transistor-based pulse generator drives the pulse-forming network to achieve a sub-nanosecond pulsewidth. The shorted stub delay line was modified to optimize the frequency response and phase linearity. The transistor-based pulse generator is an inexpensive way of producing a square pulse of sharp rise time; this design achieved 280-ps rise time. A Schottky diode was used to eliminate the negative part of the output pulse as well as to reduce the ringing. Multiple simulations and measurements were performed to study the circuit behavior. The measurement results demonstrated a pulsewidth as sharp as 153 ps with 0.83-V amplitude and a low ringing on the order of 10%. The Gaussian monopulse was obtained by feeding the Gaussian pulse to a broadband 90° hybrid, which acts as a differentiator in the time domain. The pulse has a width on the order of 100 ps. The transmitter circuit was completed by connecting the monopulse circuit with an antenna. The measured radiated pulse in the far field of the transmitter is a second derivative Gaussian pulse with 85 ps of pulsewidth.