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A printed dipole, with integrated parasitic elements, features a broad operating bandwidth. A conventional antenna design was implemented and the single-band characteristics (2.4 to 2.9GHz) were measured. The insertion of symmetrical parasitic elements at the side of the radiating elements was then investigated. A proposal is made to use a rhombic radiation patch with parasitic elements to increase the resonance modes of a printed dipole-type antenna for wideband operation. Wireless applications were obtained by optimizing the dimensions of the printed dipole-type antennas. For WLAN systems, a broadband antenna with two inverted-L slits in the parasitic elements was also studied. In addition, detailed design steps and experimental results for the designs were investigated. [ABSTRACT FROM AUTHOR]

The article focuses on the antenna being proposed as it supports a dual-band operation at 2.23 to 2.62 gigahertz (GHz) and 4.84 to 5.38 GHz, having good radiation characteristics. It is noted that the proposed antenna is said to have a simple structure, low profile in small dimensions. Hence, it is concluded that it will be an attractive candidate for WLAN applications while there must be a suitable applications of installation in notebook computers.

The article features the design for the Printed Dipole that delivers high benefits for Wireless Local Area Networks (WLANs). It notes that due to the growing use of Internet access worldwide, the technology has changed to complexity requiring versatile antennas providing high performance output. It mentions that although the dipole has sensible performance relative to the resonant frequency, its information measure at the required LAN is nevertheless determined.

The article discusses the issues concerning the commercial processing workload (CPW)-fed rectangle-trapezoid-rectangle shaped monopole antenna for ultra-wideband (UWB) systems. UWB technology has been widely used in various wireless communications applications and has attracted much attention for communications systems. It states that UWB is suitable for high-speed wireless communications within wireless personal area network (WPAN). It emphasizes that the size of the antenna of UWB platform for portable devices is a critical issue because of its effects in wide impedance bandwidth.

A compact design for a dual-band inicrostrip-fed antenna for WLAN USB is presented. The antenna structure consists of a bent copper sheet and a 50 Ω microstrip line. By adjusting the shape and dimensions of the copper sheet, the dual-band characteristics of the proposed antenna can be obtained, The measured bandwidth of the proposed USB antenna covers the WLAN bands (2.45/5.2/5.8 GHz) with a return loss greater than 10 dB. Furthermore, the effect of the metal below the USB antenna is also investigated. Details of the antenna design and experimental results of the constructed prototypes are presented and discussed. [ABSTRACT FROM AUTHOR]

This article describes a compact and simple coplanar waveguide mono pole antenna for ultra- wideband (UWB) applications. The overall size of the printed antenna is 26 x 35 x 1.6 mm, which is very compact, low profile and can be integrated in an ultra-wideband transceiver for further integration. The wideband performance is achieved by properly choosing the dimensions of the rectangle-semicircle-rectangle shape of the antenna. The design of the proposed antenna is suitable for ultra-wideband applications, which covers the 3.1 to 10.6 GHz band. The printed coplanar wave guide antenna is fed by a 50 Ω microstrip line, with a small rectangle for broadband operation. For a -10 dB return loss, the operating bandwidth of the antenna is 3.1 to 11 GHz. The antenna gain varies from 1.47 to 5.02 dBi. Both impedance and radiation characteristics of this antenna are studied. The proposed antenna has a very simple geometrical structure and proves to be a good candidate for ultra- wideband applications. [ABSTRACT FROM AUTHOR]

In this design, a novel rhombic CPW-feed antenna is presented to achieve broadband operation. The antenna has dimensions of 28.5 × 17.0 × 0.8 mm and has good radiation characteristics. The proposed antenna uses a coplanar waveguidefeeci line with a rhombic radiation patch to cover the frequency band limited by the Federal Communications Commission (FCC)for the ultra-wideband (UWB) standard. The fabricated antenna achieved a -10 dB impedance bandwidth covering from 3.1 to 11.9 GHz (approximately 117 percent). However, the frequency band from 5.15 to 5.825 GHz is used in the IEEE 802. ha standard and HIPERLAN/2. A straight slit, embedded in one of the symmetrical ground plane, plays the role of a filter to eliminate the unwanted band. The effects of varying the location and length of the slit and the structure of the ground and mono pole patch on the antenna performance have also been studied. [ABSTRACT FROM AUTHOR]

In this article, a novel design of a printed coplanar waveguide (CPW)-fed monopole antenna is implemented to simultaneously satisfy wireless local area network (WLAN,) and worldwide interoperability for microwave access (WiMAX) applications. First, a printed half-elliptic monopole antenna constructed for broadband operation. A printed half-elliptic monopole antenna, with two sections of the metal surface etched, was then investigated to obtain a dual-band operation with two bands: 2.30 to 4.15 GHz and 4.93 to 5.83 GHz. The low band (2.5 to 2.7 GHz) is quite near the middle band (3.3 to 3.8 GHz) of WiMAX, resulting in a large coupling effect or interference between these two bands; a band-reject function is needed to suppress the undesired frequency band between the low band and the middle band of WiMAX. Therefore, by etching two narrow slits on the dual-band printed mono pole antenna, a triple-band antenna design for WLAN/WiMAX applications can be obtained. The low cost, ease of manufacture, good impedance match and good radiation pattern properties of the proposed antenna are also investigated. [ABSTRACT FROM AUTHOR]

A novel design of a printed heart-shaped monopole antenna, with a ring-section slot for IEEE 802.16a and ultra-wideband (UWB) applications, is proposed where the 5.150 to 5.825 GHz frequency band has been rejected. The measured bandwidth ranges, for a return loss greater than 10 dB, are 2.30 to 5.02 GHz and 6.08 to 12.37 GHz. The parameters that affect the frequency and efficiency of the Proposed antenna have been investigated. [ABSTRACT FROM AUTHOR]

A cross semi-elliptic, monopole antenna with a band-rejected characteristic is presented and investigated. By embedding four L-shaped slits on the cross semi-elliptic monopole, an antenna with a rejected band from 5.29 to 6.20 GHz can be implemented. The good dipole-like radiation characteristics of the constructed prototype are shown. The broadband bandwidth and good radiation properties of the proposed design make it suitable for wireless applications when a rejected band is needed. [ABSTRACT FROM AUTHOR]

The article describes a triple-band polygonal slot antenna suitable for WiMAX applications. The polygonal slot antenna has broadband features. The triple-band antenna can be achieved by properly choosing the length and location of the two narrow strips. The article examines the good impedance matching, good radiation patterns and antenna gain of the proposed triple-band polygonal slot antenna.

The article examines the broadband design of a small non-symmetric ground open slot antenna. The microstrip open slot antennas have been designed to attain wider bandwidths with shorter vertical lengths. The article also describes a quarter-wavelength slot antenna with an L-shaped horizontal and vertical tuning stub.

Across semi-elliptic monopole antenna with a finite ground plane is presented. Both impedance and radiation characteristics' of this antenna are studied. Experimental results indicate that an impedance bandwidth of 10.15 GHz is achieved at operating frequencies from approximately 1.85 to 12 GHz, which covers the bands of most wireless and ultrawideband (UWB) applications. By cutting four narrow slits on the cross semi-elliptic monopole antenna, a band-rejected (5.24 to 6. 04 GHz).UWB antenna can be implemented. Good dipole-like radiation characteristics of the constructed prototype are also shown in this article. The broad bandwidth and good radiation properties of the proposed design are suitable for UWB applications. [ABSTRACT FROM AUTHOR]

A novel compact rectangular slot antenna printed on a dielectric substrate and fed by a 50Ω microstrip is presented. Both impedance and radiation characteristics of this antenna are studied. Experimental results indicate that a 2:1 VSWR bandwidth of 3.95 GHz is achieved at operating frequencies from approximately 1.83 to 5.78 GHz, which is approximately five times that of a convectional printed wide-slot antenna. The good radiation characteristics of the constructed prototype antenna are also shown in this article. The broadband bandwidth and good radiation properties of the proposed design are suitable for most wireless applications. [ABSTRACT FROM AUTHOR]

Microstrip-line-fed, printed isosceles triangular slot antennas, with a small rectangular slot for broadband operation, are proposed and experimentally investigated. Both impedance and radiation characteristics of these antennas are studied. Experimental results indicate that a 2:1 VSWR is achieved over a bandwidth of 2.9 GHz, between 2.33 and 5.23 GHz, which is nearly 4.6 times that of conventional microstrip-line-fed, printed isosceles triangular slot antennas. [ABSTRACT FROM AUTHOR]