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Fuze echo is an important factor affecting fuze-warhead matching efficiency. Based on the combination of physical optics algorithm and method of equivalent currents, the modeling of near-field echo of extended target was built. A typical encounter model of missile and target was taken as example to study the change of target echo under different irradiation conditions. From the analysis of the results,...
The change of the target RCS with the transmission polarization mode is regular. Firstly, the polarization angle is defined to represent different transmission polarization modes; Secondly, the trajectory of target RCS varying with polarization angle of incident electromagnetic wave is pointed out to be a cosine curve by formula derivation. The simulation results show that the trajectory from formula...
The model of horn antenna was built. The radiation field of the antenna was simulated and used as the incident wave. The influence of the distance between target and antenna as well as the antenna beam on the near-field scattering characteristic was studyed from near-field RCS and angular glint. The result was compared with the far field condition's. The results show that when the antenna is near...
A new compact differential dual- frequency antenna with signal layer substrate is described, and the antenna is symmetric. Compared with the conventional differential dual-frequency antenna, the split-rectangle ring ground plane is attached on the back,and the two E-shaped microstrip patches with feeding line are printed on the top of the substrate, thus the dimension of the antenna is reduced effectively...
A miniaturized branch-line coupler is achieved by using the unit cells of novel center-symmetrical spiral-interdigital resonator (CSSIR) in this article. Due to its intrinsic convoluted structure, CSSIR can be completely embedded in the microstrip line, and a compact transversal dimension is realized. The electromagnetic characteristics of CSSIR are analyzed by Ansoft Designer and equivalent circuit...
In view of the application problem of the tactic maneuver of stealth target, the electromagnetic model of one typical stealth target is established and all airspace static RCS is gained in firstly. Secondly, the relationship between tactic maneuver and the line of sight of radar is analyzed. And then the dynamic RCS series is exhibited through different yaw, pitch and rolling maneuver. Finally, the...
The application of traditional Composite Right/Left Handed Transmission Line based on micro-strip slit and Complementary Split Ring Resonators (CSRRs) is limited because of its narrow bandwidth and high insertion loss in passband. In order to solve these problems, microstrip slit based on Minkowski fractal is used to broad the bandwidth, and bilateral stubs are loaded to improve band-stop characteristic...
A compact and planar dual band antenna for Bluetooth and ultra-wideband (UWB) application is presented. The antenna exhibits a dual band operation covering Bluetooth (2.4–2.484 GHz) and UWB (3.1–10.6 GHz) frequency bands. It is composed of a semi-bevelled-rectangle patch and an L-shaped strip and fed by a microstrip line. The antenna is built on a FR4 substrate with only 21×40 mm2 surface area. Details...
A novel planar scissors monopole antenna for ultrawideband (UWB) communication is presented in this paper. Printed on a dielectric substrate and fed by a 50 microstrip line, a planar scissors monopole has been demonstrated to provide an ultra-wide bandwidth with voltage standing wave ratio (VSWR) less than 2 with satisfactory radiation properties. Details of the antenna design and measured results...
A compact planar monopole antenna with standard band-notched characteristic suitable for ultra-wideband (UWB) applications is presented. This microstrip-fed antenna, consisting of a bevelled and slotted rectangular planar monopole with a vertical tuning stub, only occupies a small size of 30(W)×35(L) ×1.6(H) mm3 included the ground plane. The length and width of the stub primarily determine the notched...
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