Miniaturisation of printed inverted-F antenna using chip coupler for Bluetooth applications

Abstract

Bluetooth ferrite antenna was fabricated on Co 2 Z-glass composite substrate and characterized in an anechoic chamber for radiation pattern and antenna gain. The developed Co 2 Z-glass composite showed 1.97 of l 0 and 7.43 of e 0 at 2.45 GHz. The magnetic and dielectric losses were less than 0.01 in the range of 1 to 3 GHz. The fabricated antenna having volume of 36 mm 3 (3 Â 8 Â 1.5 mm 3 ) showed wide BW (390 MHz at VSWR < 2). The antenna gain was measured in the frequency range of 2.2 to 2.6 GHz. The measured 3D peak-and average-gains at 2.45 GHz were 2.45 and À1.89 dBi, respectively. In addition, the maximum 3D peak gain and RE were 3.32 dBi at 2.35 GHz and 77.7% at 2.3 GHz, respectively. These results imply that the Co 2 Z-glass composite is an underpinning magneto-dielectric material for GHz antenna application. ABSTRACT: Fiber core size determination from power transmission modulation for different fibers is reported. Three different fibers are tested and power variations of lateral displacement of the second fiber are obtained (lamp, red LED). From the averaged bandwidths of the response curves the core diameter of each fiber is determined.

Broadband bluetooth antenna based on Co2Z hexaferrite‐glass composite

“…The performance and comparison of the Bluetooth antennas are summarized in Table 1. The BW and gain of the ferrite antenna were broader and higher than those of dielectric chip antennas [6][7][8][9]. This is because Co 2 Z-glass composite possesses relatively high permeability and shows low magnetic losses in the GHz range, and also nonembedded radiator structure.…”

A 2.45/5.8 GHz folded monopole antenna for WLAN applications

“…A conventional printed Inverted-F-Antenna (PIFA) [1], [6] covers almost all of these requirements, but usually demands one long dimension on the Printed Circuit Board (PCB) due to the aspect-ratio. A printed folded (hairpin) monopole antenna [7], [8] without the extensive horizontal arm offers smaller size, dual-band operation with a second resonance which is closer to the first resonance than the PIFA, good omnidirectional radiation characteristics, high efficiency and easy to manufacture.…”

Miniaturized Dual-Band Wireless Local Area Network Antenna Using Low-Temperature Co-Fired Ceramic Technology

“…Many effective ways have been proposed to improve antenna performance and reduce the size (Rowell & Murch, 1997;Choi et al, 2001;Moon & Park, 2003;Wong, 2006;Ryu et al, 2010). A planar inverted-F antenna (PIFA) for mobile telephone handsets was introduced in Rowell and Murch (1997).…”

“…The narrow meander lines printed on the ceramic material and the bottom face of the substrate were connected through via-holes. Some other surface-mountable chip antennas for wireless local area network (WLAN) operations were proposed in Wong (2006) and Ryu et al (2010). They had small volume and good performance.…”