Time-domain integration method of moments used for ultra wideband response of monopole antenna

A finite-ground coplanar waveguide (FGCPW)-fed compact ultra-wideband flag-shaped monopole antenna is presented. The antenna consists of a FGCPW-fed monopole asymmetrically loaded with a rectangle strip. The antenna has a compact size of 21.85 × 28 × 1.6 mm3. Parametric analysis is conducted to understand the effect of various parameters on the antenna performance. Simple design equations are presented to provide reliable initial design of the antenna if a different substrate is to be used. Constant gain and monopole-like radiation patterns are observed along the entire operating range from 3.1 to 12 GHz. Investigation of the time domain characteristics reveals that the proposed antenna exhibits excellent pulse handling capabilities.

Download Full-text

Direct time-domain integration method for exponentially damped linear systems

Computers & Structures ◽

10.1016/j.compstruc.2004.08.004 ◽

2004 ◽

Vol 82 (29-30) ◽

pp. 2453-2461 ◽

Cited By ~ 58

Author(s):

S. Adhikari ◽

N. Wagner

Keyword(s):

Linear Systems ◽

Time Domain ◽

Integration Method ◽

Domain Integration

Download Full-text

The Time-Domain Integration Method of Digital Subtraction Angiography Images

Computational and Mathematical Methods in Medicine ◽

10.1155/2018/5284969 ◽

2018 ◽

Vol 2018 ◽

pp. 1-5

Author(s):

Shuo Huang ◽

Le Cheng ◽

Bin Zhu ◽

Ping Zhou ◽

Yu Sun ◽

...

Keyword(s):

Digital Subtraction Angiography ◽

Time Domain ◽

Noise Suppression ◽

Integration Method ◽

Enhancement Effect ◽

Digital Subtraction ◽

Denoising Method ◽

Signal Image ◽

The Time Domain ◽

Domain Integration

The clarity improvement and the noise suppression of digital subtraction angiography (DSA) images are very important. However, the common methods are very complicated. An image time-domain integration method is proposed in this study, which is based on the blood flow periodicity. In this method, the images of the first cardiac cycle after the injection of the contrast agent are integrated to obtain the time-domain integration image. This method can be used independently or as a postprocessing method of the denoising method on the signal image. The experimental results on DSA data from an aortic dissection patient show that the image time-domain integration method is efficient in image denoising and enhancement, which also has a good real-time performance. This method can also be used to improve the denoising and image enhancement effect of some common models.

Download Full-text