Topic
Stub (electronics)
About: Stub (electronics) is a research topic. Over the lifetime, 8172 publications have been published within this topic receiving 75018 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a planar circular slot antenna for UWB communications is presented, and the integration on this antenna of a notch filter, to reduce the possible interferences with the 5 GHz WLAN communications, has been discussed in detail.
Abstract: —The study of a planar circular slot antenna for Ultrawideband (UWB) communications is presented. The integration on this antenna of a notch filter, to reduce the possible interferences with the 5GHz WLAN communications, has been discussed in detail. Four different structures, achieved by etching a suitable pattern on the antenna circular stub, have been considered, and their features have been compared. The antenna with symmetrical and inverted-L cuts shows the best performance, and it has been therefore realized and fully characterized. It shows very good matching features over the UWB band, and notable rejection of the 5 GHz WLAN band.
128 citations
TL;DR: In this article, an improved frequency notched ultrawideband (UWB) microstrip slot antenna with a square ring resonator embedded in the tuning stub is proposed, and the antenna is investigated numerically and experimentally for its impedance matching property and radiation performance in detail.
Abstract: An improved frequency notched ultrawideband (UWB) microstrip slot antenna with a square ring resonator embedded in the tuning stub is proposed. The antenna is investigated numerically and experimentally for its impedance matching property, frequency notched characteristic and radiation performance in detail. As will be reported, compared with conventional frequency notched slot antennas, after incorporating a square ring resonator with the slot antenna's tuning stub, high, sharp band-rejection characteristic of over 20 dB is achieved, which is improved significantly.
127 citations
TL;DR: In this paper, the propagation of acoustic waves through a linear waveguide, created inside a two-dimensional phononic crystal, along which a side branch (or stub) is attached, is studied.
Abstract: We study theoretically the propagation of acoustic waves through a linear waveguide, created inside a two-dimensional phononic crystal, along which a side branch (or stub) is attached The primary effect of this resonatoris to induce zeros of transmission in the transmission spectrum of the perfect waveguide The transmittivity exhibits very narrow dips whose frequencies depend upon the width and the length of the stub When a gap exists in the transmittivity of the perfect waveguide, the stub may also permit selective frequency transmission in this gap We have considered phononic crystals constituted by either fluid or solid constituents The calculations of the band structure and transmittivity are performed by a combination of finite-difference time domain and plane-wave expansion methods
127 citations
01 Jan 2010
TL;DR: In this article, a tri-band filter with three pass-bands centered at 2.45, 3.5, and 5.25 GHz is proposed, where the DGS resonator on the lower plane constructs the first passband, and the SLR on the upper plane forms the second and third passbands, in which a DGS loop is properly used to pro- videdethecoupling betweenthe SLRs.
Abstract: Atri-bandbandpassfilterusingstubloadedresonator (SLR) and defected ground structure (DGS) resonator is proposed in this letter. The DGS resonator on the lower plane constructs the first pass-band, and the SLR on the upper plane forms the second and third pass-bands, in which a DGS loop is properly used to pro- videthecouplingbetweentheSLRs.Thethreepass-bandsarecom- bined together with a common T-shaped feed line, and a reason- able tuning method is adopted to tune the three pass-bands with smooth responses. A compact tri-band filter with three pass-bands centered at 2.45, 3.5, and 5.25 GHz is designed and fabricated. The measurement results agree well with the full-wave electromagnetic designed responses. Index Terms—Defected ground structure (DGS) resonator, stub- loaded resonator (SLR), tri-band filter, T-shaped feed line.
127 citations
TL;DR: In this paper, a tunable interdigital coplanar filter with tapped-line feedings is presented, where capacitors are used as a high contrast capacitive switch between a quarter-wavelength resonator and an open-ended stub to perform the frequency shift.
Abstract: This paper presents a tunable interdigital coplanar filter with tapped-line feedings. Microelectromechanical systems capacitors are used as a high contrast capacitive switch between a quarter-wavelength resonator and an open-ended stub to perform the frequency shift. A two-pole tunable filter with a 13% relative bandwidth has been designed, fabricated, and measured. The center frequency can be switched from 18.5 to 21.05 GHz with low return losses (less than 15 dB) and low insertion losses (3.5 dB).
126 citations