Radiation properties of modified fractal microstrip antennas

Tada, Shinya; Chayono, Ridho; Shinohe, Yusuke; Kimura, Yuichi; Haneishi, Misao

doi:10.1002/ecja.20296

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…Tada et al reported a modified Sierpinski gasket microstrip antenna (SG-MSA) using an Lprobe as a feeding system. Excellent multiband performances could be achieved over the three operating frequencies without fail [3]. Rhombic microstrip antenna with multiple inverted V-shaped slots fed by the L-probe was reported as a useful model for multiband operation [4].…”

Section: Introductionmentioning

confidence: 99%

Radiation Properties of Single-Layer Multiband Rhombic MSA with Slots

Shinohe

Chayono

Haneishi

et al. 2007

2007 European Conference on Wireless Technologies

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This paper demonstrates a novel multiband rhombic microstrip antenna (MSA) with multiple slots printed on a single-layer PTFE substrate. The antenna is fed by a coplanar gap coupled with a V-shaped patch. Three inverted V-shaped slots are assumed on the rhombic patch and hence four resonant frequencies are obtained. Broadside radiation patterns and gain of over 5.0 dBi are also obtained. Experiments were carried out to verify the results estimated by IE3D simulator. Good agreements between simulated and measured results are confirmed. To further evaluate the performance, rhombic MSA with six inverted V-shaped slots is also investigated. Again, this antenna model accomplishes excellent multiband performances over the seven observed frequencies. Thus, the rhombic MSA with multiple slots is well suited as an alternative design for a multiband planar antenna.

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Section: Introductionmentioning

confidence: 99%

Radiation Properties of Single-Layer Multiband Rhombic MSA with Slots

Shinohe

Chayono

Haneishi

et al. 2007

2007 European Conference on Wireless Technologies

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“…Recently, along with multiband and wideband applications of wireless communication devices, research on fractal antennas with multiband characteristics has been carried out extensively [1][2][3][4][5][6][7][8][9][10][11][12]. However, this type of antenna has mainly been used for the radiating elements of a monopole antenna with a three-dimensional configuration for multiband operation [3,5,7].…”

Section: Introductionmentioning

confidence: 99%

Radiation properties of fractal microstrip antennas

Tada

Haneishi

Kimura

2005

Electron. Comm. Jpn. Pt. II

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SUMMARYThe fundamental configuration method and radiation characteristics are described for a new type of multiband planar antenna in which triangular microstrip antennas (MSA) with a Sierpinski fractal structure are used as the radiating elements. In order to verify the performance of the present antenna system, Sierpinski triangular microstrip antennas with multiband characteristics are fabricated for trial in the C band and X band. According to the experiment, excellent multiband characteristics can be obtained with the proposed antennas. The measured radiation patterns agree very well with those obtained by numerical calculations. Hence, it is clear that the present antenna system can be a promising format for a multiband planar antenna with a low profile.

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“…The modified Sierpinski gasket microstrip antenna (SG-MSA) fed by the embedded L-probe with a doublelayer dielectric substrate was reported by Tada et al as a multiband planar antenna [5]. Three operating frequencies with excellent radiation properties were achieved.…”

Section: Introductionmentioning

confidence: 99%

Radiation Properties of Multiband Circular MSA with Half-Ring Slots

Chayono

Haneishi²,

Kimura³

2007

IEICE Transactions on Electronics

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Novel multiband circular microstrip antennas (C-MSAs) with multiple half-ring slots are presented in this paper. Two antennafeeding systems, i.e. an embedded L-probe beneath the patch and a coplanar circular arc-shaped probe (T-probe), are used to feed the C-MSA with multiple half-ring slots. The embedded L-probe is used to excite the C-MSA with a double-layer dielectric substrate due to its tremendous performance to provide a wideband impedance matching. The coplanar T-probe is proposed to realize an excellent multiband C-MSA in a single-layer structure. The C-MSA with four half-ring slots fed by the embedded Lprobe exhibits satisfactory radiation characteristics. Five frequencies with broadside radiation patterns and gains of at least 5.0 dBi are obtained. It is also confirmed by simulation that resonant frequency and gain can be easily controlled to meet the desired frequency requirements. Moreover, the C-MSA with three half-ring slots fed by the coplanar T-probe presents satisfactory performance over the four observed frequencies with good return losses (−10 dB reference). Broadside radiation patterns with acceptable cross-polarization level and gains in the range of 3.0-7.0 dBi are obtained. Couplings between the C-MSA and the coplanar T-probe have an important contribution to obtain good return losses. It can be controlled by adjusting the distance between them and the arc angle of the coplanar T-probe appropriately. Experiments of both types of antenna were conducted to verify the simulation results and good agreements are confirmed. Due to the performances, these two C-MSAs are considered to be an effective model as a multiband planar antenna.

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Radiation properties of modified fractal microstrip antennas

Cited by 7 publications

References 8 publications

Radiation Properties of Single-Layer Multiband Rhombic MSA with Slots

Radiation Properties of Single-Layer Multiband Rhombic MSA with Slots

Radiation properties of fractal microstrip antennas

Radiation Properties of Multiband Circular MSA with Half-Ring Slots

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