Radiation From Cavity-Backed Fractal Aperture Antennas

Ghosh, Basudeb; Sinha, Shishir; Kartikeyan, M. V.

doi:10.2528/pierc09110104

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…A slot antenna was located above a plane reflector for one quarter of a wavelength [9]. In [10,11], different cavities and apertures were studied for stable unidirectional radiation and wide impedance matching. Notwithstanding, these methods have the disadvantages of bulky structures and large variations in beam width over the operating band.…”

Section: Introductionmentioning

confidence: 99%

A Wideband Magneto-Electric Dipole Antenna Using CPW Structure

Xie¹,

Deng²,

Yin³

2013

PIER C

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A new wideband magneto-electric dipole antenna using coplanar waveguide (CPW) structure is proposed in this paper. The proposed antenna consists of a pair of horizontal triangular patches and two vertically oriented L-shaped strips. By introducing triangular patches working as an electric dipole, the antenna can operate in a wide band. With the use of L-shaped strips equivalent to a magnetic dipole, the antenna is low in profile. A microstrip feed line is located between the two L-shaped strips to form a coplanar waveguide structure and excite the antenna. By carefully adjusting the gap between the feed line and the strips, the impedance bandwidth can be improved largely. A parametric study is performed to provide information for designing and optimizing such an antenna. A prototype is fabricated and measured. The simulated and measured results show that the impedance bandwidth for SWR less than 2 of the proposed antenna is 58. . Due to the complementary nature of the antenna, the proposed antenna has a unidirectional radiation pattern with low-polarization and low back-lobe radiation over the whole operating band. Furthermore, the gain of the antenna is stable across the entire bandwidth.

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Section: Introductionmentioning

confidence: 99%

A Wideband Magneto-Electric Dipole Antenna Using CPW Structure

Xie¹,

Deng²,

Yin³

2013

PIER C

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“…A multi-band Cantor fractal monopole antenna covering GSM, DCS, PCS, UMTS, and WLAN applications have been presented in [59]. In [60], several dual-band cavity-backed fractal aperture antennas are investigated where the problem formulation is done by using a hybrid finite element-boundary integral method. A triangular monopole antenna [61] on Sierpinski gasket fractal-based ground plane is proposed to obtain a dual-band characteristic for the 8011 standard (WLAN).…”

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confidence: 99%

Fractal antennas and arrays: a review and recent developments

Karmakar

2020

Int. J. Microw. Wireless Technol.

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In mathematical definition, a fractal is a self-similar subset of Euclidean space whose fractal dimension strictly exceeds its topological dimension which in turn involves a recursive generating methodology that results in contours with infinitely intricate fine structures. Fractal geometry has been used to model complex natural objects such as clouds coastlines, etc., that has space-filling properties. In the past years, several groups of scientists around the globe tried to implement the structure of fractal geometry for applications in the field of electromagnetism, which led to the development of new innovative antenna configurations called “fractal antennas” which is primarily focused in fractal antenna elements, and fractal antenna arrays. It has been demonstrated that by exploiting the recursive nature of fractals, several marvellous kinds of properties can be observed in antennas and arrays. The primary focus of this article is to provide a compressed overview of the developments in fractal-shaped antennas as well as arrays over the last few decades where the most prominent contributions mostly from IEEE journals have been highlighted. The open intention of this review work is to show an encouraging path to antenna researchers for its advancement using fractal geometries.

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“…Since unidirectional patterns are required for applications in WLAN and pulse RADARs [10][11][12][13], a square cavity is made at the wide slot of the proposed planar antenna. An inverted microstripfed cavity backed antenna presented in [12], has a CP bandwidth of only 15%.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth Enhancement of Circularly Polarized Square Slot Antenna

Joseph¹,

Fukusako²

2011

PIER B

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Abstract-Bandwidth enhancement technique of circularly polarized square slot antenna is presented in this paper. A square slot antenna with the components of L-probe separated could achieve an axial ratio (AR) bandwidth of 33.84%. Placing Stubs in the slot by studying the electric field behaviour could enhance the AR bandwidth by around 10%. Creating an L-shaped slot on the ground plane, where the electric field rotates in the desired clockwise direction, can further enhance the bandwidth by 7%. A < −10 dB S 11 bandwidth of 46.15% and < 3 dB AR bandwidth of 50.35% could be achieved with the present design. Unidirectional patters are obtained by having a cavity at the wide slot of the antenna and shows a measured bandwidth of 41.79% in S 11 and 44.97% in AR. Both antennas show a cross polarization discrimination of more than 15 dB on a wide azimuth range. The measured results well comply with the simulated results.

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Radiation From Cavity-Backed Fractal Aperture Antennas

Cited by 6 publications

References 10 publications

A Wideband Magneto-Electric Dipole Antenna Using CPW Structure

A Wideband Magneto-Electric Dipole Antenna Using CPW Structure

Fractal antennas and arrays: a review and recent developments

Bandwidth Enhancement of Circularly Polarized Square Slot Antenna

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