Ultra wide‐band bow‐tie slot antenna fed by a CPW‐to‐CPW transition loaded with inductively coupled slots

Abstract

The bandpass filter with a wide stopband bandwidth is proposed from using a folded hybrid over/under-coupled line structure. A sample 2.4/3-GHz diplexer composed of the folded filters in a direct-parallel topology layout is presented with good performance. A simple but rather accurate prediction method is proposed to calculate the dimensions of the extended over/under-coupled section. Moreover, a novel technology based on the folded line topology to relocate the third zero is demonstrated for a wider rejection bandwidth. The filter and diplexer are studied and demonstrated for the folded topology with a proper connection line design between filters. The significantly improved out-of-band specification should be applicable in many mobile communications. ACKNOWLEDGMENTS

Printed Microstrip-Line-Fed Elliptical Slot Antenna with Very Wide Bandwidth

“…Therefore, various configurations have been presented in antenna design to enhance operating bandwidths, such as wide slot [1][2][3][4][5][6][7][8][9], CPW-fed monopole [10], bow-tie slot [11], sleeve shaped [12,13]. Among these designs, the slot antenna is a good candidate owing to its wide impedance bandwidth, simple structure, low profile and easy fabrication.…”

A compact open‐ended slot antenna design for ultrawideband applications

“…However, conventional planar UWB antennas may exhibit a large aperture size (larger than 0.6λ o ), which results in difficulty to integrate with mobile communication devices with compact sizes. Thus, planar UWB antennas with close‐end slot designs are proposed [9–14], so that wideband characteristics can be achieved while enable a size reduction in antenna size. However, these designs [9–14] have demonstrated unstable antenna's gain due to smaller radiating area of the antennas.…”

“…Thus, planar UWB antennas with close‐end slot designs are proposed [9–14], so that wideband characteristics can be achieved while enable a size reduction in antenna size. However, these designs [9–14] have demonstrated unstable antenna's gain due to smaller radiating area of the antennas. To overcome the disadvantages mentioned above, planar UWB antennas with open‐ended slots are proposed [15–21].…”

Modified bow‐tie slot antenna for the 2.4/5.2/5.8 GHz WLAN bands with a rectangular tuning stub

“…Moreover, compared with microstrip patch antennas, slot antennas have the advantages of wider bandwidth, superior impedance matching, lower dispersion, lower radiation loss, and the possibility of obtaining a bidirectional radiation pattern [2]. Although a number of bow-tie antennas and bow-tie slot antennas have been proposed for wide bandwidths [3][4][5][6][7][8][9][10], however, studies on the bow-tie slot antenna for triple-band applications are rare. Only studies on bow-tie antennas for dual-band applications had been published [11,12].…”