Stub (electronics)

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

Broadband plate antenna

Abstract: A broadband plate antenna ( 402 ) is disclosed, which includes a ground conductor ( 407 ) and a radiating element ( 406 ) which is separated from the ground conductor ( 407 ). The antenna also includes an impedance matching stub ( 404 ) electrically coupled to the radiating element ( 406 ), and means for feeding the radiating element ( 406 ), wherein the means for feeding includes a feed point ( 410 ) disposed on the impedance matching stub ( 404 ).

Broadband aperture-coupled circularly polarized microstrip antenna fed by a three-stub hybrid coupler

Abstract: A novel aperture-coupled circularly polarized microstrip antenna with a three-stub hybrid coupler feed circuit in order to generate broadband circular polarization radiation is proposed. The bandwidth is 32.3% for 2:1 VSWR and 42.6% for 3-dB axial ratio. The achievable maximum gain is 8.8 dBic. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 38–41, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11280

Printed Quasi-Yagi Antennas Using Double Dipoles and Stub-Loaded Technique for Multi-Band and Broadband Applications

Abstract: Double dipoles on a single-layer substrate are utilized to construct a triple-mode printed quasi-Yagi antenna for the multi-band and broadband antenna applications. A stub-loaded dipole generating two resonant modes (i.e., lower dual-mode dipole) is allocated on the underside of a simple dipole (i.e., upper single-mode dipole) introducing the third resonant mode. Using these three resonant modes, three compact printed quasi-Yagi antennas, i.e., tri-band, dual-band, and broadband printed quasi-Yagi antennas, are designed with the same antenna prototype but different parameter values. Seen from the measured results, all of these three antennas have good unidirectional radiations, high radiation efficiencies, and low cross-polarization levels at the operating frequencies within the impedance bandwidths.

Compact CPW UWB diversity slot antenna with dual band‐notched characteristics

Abstract: A compact coplanar waveguide (CPW) fed ultrawideband (UWB) slot antenna for multiple-input-multiple-output (MIMO)/diversity applications is presented in this letter. The antenna consists of two coplanar waveguides (CPWs) feeding circular radiating elements and a protruded stub, which is placed at between them. The circular radiating elements are arrange orthogonally and fed perpendicularly to obtain polarization diversity. Notched band at X-band communication downlinks is achieved by etching split ring resonator slots in the radiators and the other notched band at WLAN system is achieved by the collaboration of arc-shaped strips and the protruded stub. The protruded stub not only can help to achieve band rejection but also can reduce mutual coupling between two ports. As all of the structures are printed in one layer, it can be very easily to be integrated with RF front-end circuits. Simulated and measured results show that the proposed antenna meets the 10-dB impedance bandwidth from 3.4 to 12 GHz and isolation better than 15 dB at most of the band. Good diversity performance in terms of envelope correlation coefficient and the ratio of mean effective gain demonstrates that the antenna is quite suitable for MIMO UWB applications. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:989–994, 2016

Combined mailer and return envelope assembly

Abstract: A single web is folded twice upon itself to provide an outgoing mailer The first fold is secured in place to define a return envelope having an envelope pocket and a sealable flap The second fold is removably secured over the first fold and may be separable into two parts, one of which being a receipt stub Also, a removable return stub is formed adjacent the return envelope