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In this paper, the parallel Adaptive Cross Approximation (ACA) algorithm is introduced to reduce the memory and CPU time requirements for solving the Time-Domain Integral Equation (TDIE). Marching-On-in-Degree (MOD) is selected to be the equation solver so as to avoid the late-time oscillation in Marching-On-in-Time (MOT); ACA is a purely algebraic algorithm whose formulation and implementation are...
In this letter, a new compact antenna design with triple-sense circular polarization (CP) is presented for ultra-wideband (UWB) communication applications. The UWB property is obtained by utilizing a compact complementary planar monopole. In order to achieve multiband CP waves on base of UWB operation, the measurement has been taken such as etching a T-shaped slit in the antenna ground and adding...
In this paper, compact ultra-wideband (UWB) antenna with controllable notched bands is proposed for UWB communication applications. The antenna utilizes co-directional complementary split ring resonator (CSRR) to achieve dual suitable notched bands in small enough size. The center frequencies of the notched bands can be electronically tuned by changing the effective electrical length of the CSRR,...
This paper presents a novel hybrid technique for analyzing complex antennas around the coated object, which is termed the iterative vector fields with Physical Optics (PO). A closed box is used to enclose the antenna and then the complex field vector components on the box' surfaces can be obtained using Huygens principle. The equivalent electromagnetic currents on Huygens surface are computed by Higher-order...
A compact ultra-wideband (UWB) antenna with dual band-notched characteristics is presented. The proposed antenna consists of a folded fork-shaped radiator and a modified ground plane. The modified ground plane with trapezoid shaped slots on its top edge effectively increases the bandwidth of the proposed antenna. To avoid potential interferences, the arms of the forked-shaped radiator are folded to...
The design, fabrication and measurement of multi-arm spiral metamaterial are introduced in this paper. The parameter retrieval results and transmission measurement both validate that the multi-arm spiral resonator (SR) have a magnetic and an electric response in the lower and higher frequency regions, which provide us a more convenient way to construct the dual-band left-handed metamaterial (LHM)...
This paper presents a quad-band filter using centrally shorted-stub loaded resonators operated at the first and third passbands and stepped impedance resonators fixed at the second and fourth passbands. A special feed structure consisting of two stepped impedance lines is proposed, and a pair of parallel coupling lines is loaded at the center of the shorted-stub loaded resonators to enhance the couple...
In this paper, thin wire structure with different radius is studied by using method of moments (MoM) based on pulse basis function. An electromagnetic model is presented to analyse thin wire structure with different radius approximately. Numerical results based on the present model have better agreement with HFSS results, which show that this present model is effective for analysing thin wire antenna...
In this paper, electromagnetic-field-coupled resonators are introduced and investigated. The electric mode at lower frequency and magnetic mode at higher frequency, originated from coupling of the electric field and magnetic field, are validated through a measurement inparallel-plate waveguide system, parameter retrieval algorithm and surface currents distributions. The new resonators with distinct...
In this paper, a type of thin planar absorbing structure of Jerusalem cross slot (JCS) is presented, which has the virtue of wider bandwidth and broader adjustment range. The absorption frequency band can be flexibly adjusted by the slot parameters. The influences of various structure parameters of JCS, incident wave polarization and variation of incident angles on the absorption characteristics are...
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