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State College, PA, United States

Li Y.,Harbin Engineering University | Li W.,Harbin Engineering University | Yu W.,2COMU Inc.
Microwave and Optical Technology Letters | Year: 2014

A compact coplanar waveguide (CPW)-fed circular slot ultrawideband (UWB) antenna with dual-band filtering characteristic is presented in this article. The dual-band filtering characteristic is achieved by inserting an arc-rectangle-shaped stepped impedance resonator in the circular ring radiation patch and etching a spiral stepped impedance resonator in the CPW-fed transmission line. The numerical and experimental results demonstrate that the proposed antenna can operate on a frequency band between 2.7 and 12 GHz with voltage standing wave ratio less than 2, except for that two filtering bands between 4.8 and 6 GHz and between 7.6 and 8.6 GHz are used to prevent the potential interference from WLAN band and X-band. In addition, the proposed antenna has a compact size and omnidirectional radiation pattern, which is suitable for UWB communication applications. © 2014 Wiley Periodicals, Inc. Source

Li Y.,Harbin Engineering University | Li W.,Harbin Engineering University | Yu W.,Harbin Engineering University | Yu W.,2COMU Inc.
Applied Computational Electromagnetics Society Journal | Year: 2013

In this paper a multi-band/Ultra- Wideband (UWB) Multiple Input Multiple Output (MIMO) antenna, which is composed of two identical microstrip fed triple notch band UWB antennas and a Radial Stub Loaded Resonator (RSLR), is proposed and verified numerically and experimentally. The antenna is designed to meet the requirement of multi-band/UWB communication applications. A Defected Microstrip Structure (DMS) Band-Stop Filter (BSF) and an invert π-shaped slot are employed to design the triple notch band UWB antenna. The resonance characteristics of the DMS-BSF and the band notch functions are presented to realize the proposed triple notch band UWB antenna. The isolation of the multi-band/UWB-MIMO antenna has been enhanced by inserting an RSLR loaded T-shaped stub between two identical triple notch band antennas. Both simulation and measurement results are presented to illustrate the performances of the proposed multi-band/UWB-MIMO antenna. © 2013 ACES. Source

Livesey M.,Accenturem Kingsley Hall | Costen F.,University of Manchester | Yang X.,2COMU Inc.
IEEE Antennas and Propagation Magazine | Year: 2012

The utilization of vector-arithmetic logic units is a promising way to speed up FDTD computations from the viewpoint of hardware acceleration. This paper studies how a streaming SIMD extensions (SSE) implementation can be effi ciently developed, and the situation where SSE is benefi cial for FDTD computations. © 1990-2011 IEEE. Source

2COMU Inc. | Date: 2012-04-10

Computer software and hardware for use providing electro-magnetic simulation for general electromagnetic problem simulation.

Li Y.,Harbin Engineering University | Li W.,2COMU Inc. | Yu W.,Harbin Engineering University | Yu W.,2COMU Inc.
Microwave and Optical Technology Letters | Year: 2013

In this article, a coplanar waveguide (CPW)-fed ultrawideband (UWB) antenna with two sharp frequency rejection functions is proposed. The dual band-notched characteristic is realized by etching a stepped impedance split-ring resonator (SISRR) and a stepped impedance resonator (SIR) in a circular radiating patch and a CPW transmission stripline, respectively. The central frequency of the two notch bands can be controlled by adjusting the SISRR and the SIR parameters. Simulation and experimental results obtained for this antenna show that it exhibits a good radiation behavior within the UWB frequency range and it also has the dual band-notched characteristics in the wireless local-area networks band and X-band, which can mitigate the potential interference between UWB systems and the designated existing narrow-band systems. Copyright © 2013 Wiley Periodicals, Inc. Source

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