Wireless Universal Serial Bus Dongle Research Articles

Compact dual‐band antenna for 2.4/5.2/5.8 GHz WLAN service for laptop computer applications

ABSTRACTIn this study, a compact dual‐band antenna for wireless universal serial bus dongle applications is proposed. The proposed structure consists of a conventional folded monopole antenna (driven element) and a strip pattern that extends from the ground (GND) plane (shorten parasitic element). The proposed antenna exhibits triple‐resonance (f1, f2, and f3). The first two resonance frequencies (f1 and f2) are generated by adding the shorted parasitic element. The third resonance frequency (f3) is generated by the folded monopole antenna. The first resonance frequency (f1) covers 2.4‐GHz wireless local area network (WLAN) service, whereas the second and third resonance frequencies (f2 and f3) cover 5.2/5.8‐GHz WLAN service. Thus, dual‐band operation for 2.4/5.2/5.8‐GHz WLAN service can be easily performed. The antenna occupies a small area of 7 × 20 mm2. It can be easily connected to the edge of the system GND plane or the supporting metal frame of a laptop computer. Details of the proposed antenna are presented and studied. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2207–2213, 2015

Compact multiband antenna with CRLH‐TL ZOR for wireless USB dongle applications

AbstractA compact multiband antenna with composite right‐ and left‐handed transmission line (CRLH‐TL) zeroth‐order resonator for wireless universal serial bus dongle applications is proposed in this article. The proposed antenna occupying a small volume of 12 × 28 × 5.8 mm3 comprises a folded monopole which can generate two resonant modes to cover the GSM850/900 (820–960 MHz) and the LTE2500 operation (2500–2690 MHz) and a CRLH‐TL ZOR structure which is capacitively excited by the folded monopole to generate zeroth‐order resonant mode to cover LTE700 (746–787 MHz). The proposed antenna offers nearly omnidirectional radiation patterns, the measured peak gain are obtained from 0.8 to 3.4 dBi, and measured antenna efficiency varies from about 40–56% in the whole operation band. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1133–1138, 2014

Design of USB dongle antenna for WLAN applications using theory of characteristic modes

A compact universal serial bus (USB) antenna design for wireless USB dongle application is presented. The use of the theory of characteristic modes (CMs) to design such an antenna is novel and leads to a systematic antenna design scheme. The physical insight that the CM offers is of great importance for designing such an antenna. The systematic placing of reactive loads on the antenna body plays a key role in matching the antenna at the desired frequency bands. The proposed antenna's overall size is (48 × 10 mm) and it can serve the WLAN IEEE 802.11 a/b/g/n bands (2.4/5.5 GHz). It could also be used for the Bluetooth and LTE applications.

A compact wideband strip antenna for wireless USB dongle application

A wideband strip antenna easy for integration with the printed circuit board of a wireless universal serial bus dongle is presented.By simply inserting slots into a rectangular patch, dual resonances with a wide continuous bandwidth of 1.98 GHz (2.9–4.88 GHz) are obtained. The antenna comprising dual-folded strips and fed by a short microstrip line is simple and has a compact size of only 9.5 × 10 mm2. Prototypes of this design have been constructed and verified to show good agreement between the simulated and measured results. In addition, design evolution of the presented antenna is performed to provide insights into the antenna-operating mechanism. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:302–304, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27331

Printed wideband notched antenna for wireless USB dongle attached to laptop computer

In the paper, a printed notched antenna for eight-band long term evolution (LTE)/global system for mobile communications (GSM)/universal mobile telecommunications system (UMTS) wireless universal serial bus (USB) dongle application is proposed. As a low profile and easily fed by a 50- microstrip feed line, the presented antenna comprises a matching network (including a serial chip capacitance 3 pF and a parallel chip inductance 8.5 nH) and a big radiating patch with a notch in the design, totally occupying a size of Based on the USB dongle system ground plane and laptop system ground plane, the radiating patch along the gap between the radiating patch and USB dongle system ground plane can generate a foundational resonant mode at about 750 MHz to cover lower bandwidth of 698–960 MHz, while the desired upper operating bands (DCS1800/PCS1900/UMTS2100/LTE2300/2500) can be obtained by the radiating patch (the notch separates the big radiating patch into two portions in order to excite another resonant mode at about 2650 MHz). Experimental results show that very good total power radiation characteristics and an adequate coverage of the whole 698–960 and 1710–2690 MHz bands are achieved, making it promising for USB dongle in laptop computer.

Miniature ultra-wideband antenna for wireless universal serial bus dongle applications

A miniature ultra-wideband (UWB) antenna for wireless universal serial bus (USB) dongle applications is presented. The proposed antenna comprises a half-circular quasi-self-complementary structure together with a triangular cut on a bent microstrip feed line. As a result of its simple geometry and compact size, the antenna can be easily integrated and printed on wireless USB dongle printed circuit boards. The dimension of the proposed antenna is only 16 mm×16.1 mm whereas the footprint size of the dongle board is 16 mm×60 mm, similar to that of a conventional USB flash disc. The simulated and measured results show that the antenna can achieve a UWB 10 dB impedance bandwidth with reasonable radiation properties. It also exhibits a much-reduced ground plane effect compared to the stand-alone design. In addition, a parametric study is performed to provide insights into the antenna operating mechanism.

A Compact Ultrawideband Slotted Patch Antenna for Wireless USB Dongle Application

A compact planar ultrawideband (UWB) antenna suitable for wireless universal serial bus (USB) dongle application is presented. By simply cutting notches and embedding types of slots into a rectangular patch, multiple resonances with effective bandwidth enhancement were achieved. A prototype of the proposed antenna was constructed and measured to show an ultrawide operating band with 10-dB return-loss bandwidth of about 10.42 GHz ranging from 2.86 to 13.38 GHz, which sufficiently covers the operating band, 3.1-10.6 GHz, of the new wireless personal area network (WPAN) using UWB technique. Also, monopole-like radiation patterns and larger than 3 dBi of peak antenna gain have been measured across the operating band. This design has an overall size of only 11 × 15 × 0.8 mm3 and is very suitable for use in an USB device.

Compact stub-loaded meander-line antenna for wireless USB dongle devices

A planar meander-line monopole antenna was designed for wireless Universal Serial Bus (USB) dongle devices. The proposed antenna shows dual-wideband resonant characteristics and supports the WiBro, Bluetooth, WLAN, WiMAX, and S-DMB (Satellite Digital Multimedia Broadcast) services. The designed antenna measures 19 × 50 × 1 mm3, which is suitable for compact USB dongles. The measured 2:1 bandwidths of the voltage standing wave ratio are 18.1% (2.26–2.71 GHz) and 16.4% (5.09–6.0 GHz). The measured peak gain is 3.49 dBi, and efficiency is higher than 56%. The radiation patterns are also nearly omni-directional. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2279–2282, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25430

Design of a planar ultra‐wideband miniature monopole antenna for wireless USB dongle devices

AbstractThis article proposes a 3.1–5 GHz ultra‐wideband antenna, defined by a −10 dB return loss.The simplified planar antenna structures, compact size, and low profile make it profitable to the application of the embedded antenna in wireless universal serial bus dongle devices. The slit shape on the monopole radiator is tuned for miniature antenna size. A parasitic stub on the ground is adopted to increase antenna bandwidth for achieving 3.1–5 GHz impedance bandwidth. To reduce manufacturing cost and practical fabrication, we also propose a simplified rectangular antenna structure. It is found that wideband characteristics of the simplified rectangular structure antenna are similar to that of semicircular base structure. Finally, the antenna prototypes are fabricated and the antenna characteristics are measured. The radiation patterns are omnidirectional in azimuth cut. Moreover, the S‐parameter of antenna characteristics has been measured. The consistency between the simulated results and the measurement results confirms the practicability of these techniques. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1013–1016, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25121

A compact internal UWB antenna for wireless USB dongle application

AbstractThis article presents a compact internal ultra‐wideband antenna for wireless universal serial bus dongle application. The proposed antenna has a simple configuration and is easy to implement by bending a simple metal plate. To widen the impedance bandwidth, the proposed antenna has a vertical patch with a bevel structure and a horizontal patch with a narrow slit. The proposed antenna satisfies the 10‐dB return loss requirement over the frequency band of 2.9–10.85 GHz (7.95 GHz) and so easily covers the UWB band of 3.1–10.6 GHz. The effects of the system ground plane on the impedance matching of antenna are studied experimentally. The detailed design of the proposed antenna is described, and experimental results including radiation patterns and peak gains are presented. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1643–1646, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23468

Wideband omnidirectional L‐shaped monopole antenna for a wireless USB dongle

AbstractA new omnidirectional monopole antenna well suited to application in a wireless universal serial bus dongle for wideband operation is presented. The antenna is an L‐shaped metal‐plate monopole antenna consisting of a rectangular monopole element and a matching portion. The antenna is suitable to be mounted at the top region of a host dongle as a concealed antenna and can provide a very wide operating bandwidth of larger than 6.8 GHz (∼3.4–10.2 GHz). In addition, omnidirectional radiation is obtained for frequencies across the operating bandwidth. Effects of the system ground‐plane length on the antenna's impedance and radiation characteristics are also analyzed. Details of the proposed antenna are described, and a prototype of the design example is constructed and studied. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 625–628, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22217