Stub (electronics)

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

Design of Miniaturized HTS Dual-Band Bandpass Filters Using Stub-Loaded Meander Line Resonators and Their Applications to Tri-Band Bandpass Filters

Abstract: We have designed a miniaturized high-temperature superconducting dual-band bandpass filters (DBPFs) using stub-loaded meander line resonators and their applications to tri-band bandpass filters (TBPFs). The DBPF enables independent control of the center frequencies of the first and second bands. The bandwidths of the DBPF can be flexibly adjusted using a capacitance-loaded microstrip line between the resonators. The DBPF was designed and analyzed using an electromagnetic simulator and fabricated using an YBa 2 Cu 3 O y thin film on an Al 2 O 3 substrate. The center frequencies are 3.5 and 5.0 GHz; two bands have 2% bandwidth. The measured frequency responses of the DBPF were in good agreement with the simulated frequency responses. The TBPF was realized by combining the DBPF and a single-band bandpass filter (SBPF) that uses a folded stepped-impedance resonator with common input and output. The DBPF constructs the first and third bands of 3.5 and 5.0 GHz, and the SBPF forms the second band of 4.25 GHz. The frequency responses of the simulated TBPF meet the design parameters.

Comprehensive Analysis of the Impact of via Design on High-Speed Signal Integrity

Abstract: In all modern high-speed digital board designs, every slightest discontinuity on the board has to be considered carefully, especially the vias, which are abundantly used in digital design. As frequency increases and signal rise time reduces, via causes impedance discontinuities resulting in signal reflections and hence deterioration of signal integrity (SI) and system performance. The paper carries out a comprehensive study of the impacts of various via design parameters on SI using a full-wave electromagnetic simulator (CST microwave suite). The design parameters under study are via diameter, via height and the excess via stub in a multilayer PCB. The study allows high-speed digital designers to have a more in-depth assessment of via design and its effect on SI performance.

A low-profile dual port UWB-MIMO/diversity antenna with band rejection ability

Abstract: A band notched ultra-wideband (UWB) antenna is presented in this article as a good prospect for multiple-input multiple-output (MIMO)/diversity application. The proposed MIMO antenna is constituted of two modified rectangle-shaped patch antenna elements. A stepped stub is extended from the modified ground plane as a decoupling element between the radiators to realize a good isolation level between them. A band rejection response is obtained by connecting an open resonant stub to each of the radiators. The simulated prototype is fabricated and tested for verification. Results reveal that the proposed prototype provides a 10 dB return loss bandwidth from 3.08 to 10.98 GHz with band notch characteristics from 4.98 to 5.96 GHz, and a good port isolation level (S21 ≤ 20). Diversity performances are ensured in terms of total active reflection coefficient, envelope correlation coefficient (<0.013 except notch band), diversity gain (≈9.51 dB), mean effective gain ratio (≈1), and channel capacity loss (≤0.35 bps/HZ except notch band). It evidences that the presented band notched UWB antenna can be a good prospective for MIMO/diversity applications.

Ultra-wideband power divider using three parallel-coupled lines and one shunt stub

Abstract: An ultra-wideband power divider with out-of-band filtering and DC blocking functions is presented. The divider consists of three parallel-coupled lines, a short-circuited shunt stub and a resistor. The divider was implemented in a two-layer printed circuit board with a high dielectric constant. The measurements show a minimum insertion loss of −0.4 dB in the middle band and a rejection of −17 to −18 dBc at 1.5 and 11.5 GHz, respectively.

Weighting device for game club including tapered shaft

Abstract: A warm-up weight for athletic implements such as golf clubs having an enlarged head with a tapered stub having its point of smallest diameter connected to a tapered shaft having its narrower end connected to the stub. The warm-up weight includes a rigid generally annular core having a compressible casing thereon and including an axial passage and a generally radial channel permitting insertion of the weight onto the implement. In use, the narrower end of the tapered shaft is passed through the radial channel into the axial passage, the weight is slid down along the tapered stub into frictional engagement therewith, and the weight is rotated approximately 90*.