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A novel wrist conformal dual-band antenna structure is proposed for application in watch-type wireless devices. Simulation results show that this structure can achieve good performance in dual GSM bands and high efficiency when worn on hand. Based on this structure, a dual-element diversity antenna is also proposed. More research regarding this novel structure will be done in the future.
A three port triple band aperture coupled microstrip antenna has been designed, manufactured and measured. Effective impedance matching has been achieved in desired bands of operation in good agreement with the simulated results.
We present the idea of a simple frequency reconfigurable patch antenna that operates at multiband from 2 GHz to 4.5 GHz in this paper. By changing the position of the microstrip connecting elements on the antenna patches, the operating frequency will shift with fixed radiation patterns. Both simulated and measured results are provided and shown in good agreement.
Microstrip patch antennas with inset feed have been studied extensively over the past two decades because of its practical advantage when used in mobile wireless systems. The length of MPA, however, is comparable to a half wavelength with single resonant frequency and bandwidth around 2%. In this paper, we describe a novel approach to reduce the antenna size and provide multiband operation. Electromagnetic...
A triple-band unidirectional coplanar antenna is developed for WLAN/WiMax wireless applications. The triple-band planar antenna consists of a top-loaded dipole for the 2.4-GHz band, two longer dipoles for 3.5-GHz band, and 2 shorter dipoles for the 5-GHz band. The triple-band antenna is printed on a coplanar substrate. The antenna achieves a similar directional radiation pattern at all of the three...
The geometry and numerical results of a dual-band circularly polarized microstrip antenna with two isolated outputs have been presented in this paper. Good return loss has been obtained for both frequency bands. Moreover, a gain response with a strong suppression in the frequency range located between both Galileo bands has been achieved. Due to its high level of integration and high of out-of-band...
Printed reflectarray applications are significantly increasing in recent years, because they represent an ideal antenna solution, having the same radiating performances of the standard parabolic reflector, but with reduced thickness, since the reflecting surface is planar. Here, we present the preliminary analysis of a prototype dual band planar antenna, realized using the reflectarray technology...
This paper presents a reflectarray configuration which supports the operation of six frequency bands. The proposed reflectarray has two substrate layers and each layer accommodates array elements of three frequency bands. Reflection phase curves of the array elements of different frequency bands are simulated. Interactions among elements are also explored.
A printed dipole antenna with a parasitic element of dual-band operation is proposed for WiMAX applications. The lower-operating band is obtained from dipole arms. By using the technique of coupling dipole arms and a parasitic element is proved to form a dual-band operation. The proposed antenna was successfully implemented and verified. It also has a compact size and good radiation performances.
The idea of this paper is to use simple symmetrical structures offering the possibility of pattern diversity or beam switching by using various feed points. Therefore, this paper focuses on a Sierpinski shaped patch antenna, offering the possibility to adjust the main beam of the antenna in three directions by using three different feed points in one structure. In contrast to the investigations in...
The radiation properties of a circular patch antenna with u-slot designed on glass epoxy FR-4 substrate are obtained and compared with that of a normal circular patch antenna designed under identical conditions. The modified antenna not only resonates at two different frequencies allotted by IEEE 802.16 working group for lower band (2.495-2.695 GHz) operation for WiMax systems but also presents marked...
The design of a novel dual-band PIFA of compact size for WLAN application has been presented. This new miniaturized PIFA is capable to operate in dual-band that cover 2.4-2.4835 GHz band for 802.11/b/g and 5.15-5.825 GHz band for 802.11a (indoor and outdoor) for application. The operation in the upper band is achieved by the introduction of a ground slot which is excited by the same feed used for...
A dual band microstrip plasmonic resonator antenna has been designed using a SRR and a feed line that also functions as a monopole antenna. This is the new aspect of the antenna design. The feed line is placed adjacent to the SRR, so that there is sufficient coupling to excite the plasmonic resonance and at the same time the line can radiate as an independent monopole antenna. The antenna has two...
In order to achieve multi-frequency operation from square ring antennas, two or more square rings are stacked and electromagnetically excited by a feed line located outside the bottom ring. The separation between rings is kept very small so that, the feed line can excite them all, and the overall height remains small. The number of rings is the same as the resonances in this configuration.
In this paper we investigate the characteristics of a novel penta-band antenna suitable for handset terminals. The structure combines shorted parasitic patches, capacitive loads and slots to achieve operation at 5 different frequencies, namely the GSM, DCS, PCS, UMTS, HIPERLAN = 2 and IEEE 802.11a bands. We demonstrate that a 2.5:1 voltage standing wave ratio (VSWR) is realized, along with good efficiency,...
A stacked rectangular MSA for triple band operation and an antenna for VICS, mobile-Wimax and ETC applications in ITS has been designed. The three resonant modes have been achieved by shorting the upper patch to the lower patch of the stacked rectangular MSA and by loading a helical pin on the lower patch conductor. The relations between three resonant frequencies for the geometry of the helical pin...
A dual-band element that operates in two separate industrial, scientific, and medical (ISM) bands is presented that provides dual-linear or dual-circular polarization in each band. The element is ideal for wireless communication applications utilizing multiple protocol and/or Bluetooth technology. This design is realizable in cost effective printed circuit board technology making it an attractive...
Antenna for mobile terminal of satellite navigation GPS and/or communication e.g. IRIDIUM, GLOBALSTAR systems is proposed. The novel design presented here takes two semi-ring patches of different radii, fed by a single microstrip line via a crossed slots in the ground plane, to produce an antenna with a CP axial ratio < 3 dB, and different impedance bandwidth, depending on frequency of operation...
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