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Stub (electronics)

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


Papers
More filters
Proceedings ArticleDOI
01 Sep 2006
TL;DR: In this paper, the authors proposed a bandpass filter with single or multi notched bands for the purpose of "DAA: Detect and Avoid", to avoid the interference between the UWB radio system and the existing radio system.
Abstract: This paper presented ultra-wideband (UWB) bandpass filters with single or multi notched band(s) for the purpose of "DAA: Detect and Avoid", to avoid the interference between the UWB radio system and the existing radio system. The filter is based on a novel UWB bandpass filter which consists a broadside-coupled microstrip-coplanar waveguide structure and exhibited its excellent ultra-wideband property, proposed by authors recently. The single and multi notched bands operation was implemented by integrating stub(s) in the broadside-coupled conductors. The resonance of each stub introduces a narrow rejection band in the UWB passband which then results in a single or multi notched band(s). Such UWB bandpass filter with notched band is useful and required in practical systems in order to avoid the interference between the UWB radio system and existing radio systems. The notched band can be easily designed to some specific frequency band(s) by tuning the length of the stub(s). Simulation, design, fabrication and measurement of the UWB bandpass filters with notched bands have been carried out mainly following FCC's spectrum mask. The proposed filters demonstrated both excellent ultra-wide bandwidth (from 2.8 GHz to 10.2 GHz) and rejection performance (> 50 dB at central frequencies for a single notched band, or 21 dB and 27 dB for triple bands), as well as good out-band performance better than the requirement of FCC's mask.

67 citations

Patent
Daniel T. Mcgrath1
03 May 2002
TL;DR: In this paper, a reflect array antenna comprises a nonelectrically conductive substrate with an array of antenna elements supported on the substrate, each antenna element comprises a plurality of patch radiating elements arranged in rows and columns, the notches being angularly displaced around the circumference of the element.
Abstract: A reflect array antenna comprises a non-electrically conductive substrate with an array of antenna elements supported on the substrate. Each antenna element comprises a plurality of patch radiating elements arranged in rows and columns. Each patch radiating element comprises a plurality of notches formed in the element, the notches being angularly displaced around the circumference of the element. A plurality of stub short transmission lines are individually positioned in each of the plurality of notches and a plurality of switches individually couple one end of a notch to one of the plurality of stub short transmission lines.

67 citations

Journal ArticleDOI
TL;DR: In this article, a low-cost CMOS ultra wideband (UWB) impulse transmitter module with a compact form factor is proposed for impulse-radio communications, which consists of a CMOS impulse generator, a compact bandpass filter (BPF), and a printed planar UWB antenna.
Abstract: In this paper, a low-cost CMOS ultra-wideband (UWB) impulse transmitter module with a compact form factor is proposed for impulse-radio communications. The module consists of a CMOS impulse generator, a compact bandpass filter (BPF), and a printed planar UWB antenna. The impulse generator is designed using a Samsung 0.35-/spl mu/m CMOS process for low-cost and low-power fabrication. The measurement shows the fabricated chip makes a train of sharp triangular pulses with a peak voltage of about 2.8 V under the supply voltage of 3.3 V. To make an impulse fit the Federal Communications Commission (FCC) spectrum mask, the compact BPF is developed using a coupled strip line and a tapered stub. Also, the compact planar UWB antenna is developed. All of the components of the UWB transmitter module are fabricated on a single package using system-on-package technology for miniaturization. The proposed UWB transmitter is tested in an office environment. The measured results show that the generated UWB signal meets the FCC regulation, and the peak-to-peak amplitude of received UWB signal at 1-m distance on line of sight is 16 mVpp with a 10-dB-gain low-noise amplifier in the receiver.

67 citations

Patent
08 Nov 2000
TL;DR: In this article, a method for repairing a turbine nozzle segment (10) having at least one vane (12) disposed between outer and inner bands is provided. But this method is not suitable for the case of a single vane.
Abstract: A method is provided for repairing a turbine nozzle segment (10) having at least one vane (12) disposed between outer and inner bands The method includes separating the inner band (16) from the nozzle segment (10), and joining the inner band (16) to a newly manufactured replacement casting (30) having an outer band and a vane (34) The replacement casting (30) includes an airfoil stub (44) The airfoil stub (44) is received in a recess formed in the inner band (16) Joining is completed by joining the airfoil stub (44) to the inner band (16) The replacement casting (30) may be modified from a newly manufactured singlet casting

67 citations

Journal ArticleDOI
TL;DR: This work introduces slow-light enhanced subwavelength scale refractive index sensors which consist of a plasmonic metal-dielectric-metal (MDM) waveguide based slow- light system sandwiched between two conventional MDM waveguides and finds that, as the group velocity decreases, the sensitivity of the effective index of the waveguide mode to variations of the refractive Index of the fluid filling the sensors increases.
Abstract: We introduce slow-light enhanced subwavelength scale refractive index sensors which consist of a plasmonic metal-dielectric-metal (MDM) waveguide based slow-light system sandwiched between two conventional MDM waveguides. We first consider a MDM waveguide with small width structrue for comparison, and then consider two MDM waveguide based slow light systems: a MDM waveguide side-coupled to arrays of stub resonators system and a MDM waveguide side-coupled to arrays of double-stub resonators system. We find that, as the group velocity decreases, the sensitivity of the effective index of the waveguide mode to variations of the refractive index of the fluid filling the sensors as well as the sensitivities of the reflection and transmission coefficients of the waveguide mode increase. The sensing characteristics of the slow-light waveguide based sensor structures are systematically analyzed. We show that the slow-light enhanced sensors lead to not only 3.9 and 3.5 times enhancements in the refractive index sensitivity, and therefore in the minimum detectable refractive index change, but also to 2 and 3 times reductions in the required sensing length, respectively, compared to a sensor using a MDM waveguide with small width structure.

67 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023205
2022471
2021294
2020397
2019433
2018472