Gain improvement for rectangular horn antenna by using curved-woodpile metamaterial

Kamphikul, Paowphattra; Wongsan, R.

doi:10.1109/ecticon.2016.7561349

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Furthermore, from [9,10], the quadratic-shaped woodpile EBG structure was used to enhance the gain of any horn antenna by its placement at the front of the horn's aperture with optimized spacing. In 2016, Kamphikul and Wongsan [11] continued to develop the cavity of curved woodpile EBG structure for the enhancement of the gain of the slot array antenna instead of increasing the number of slots on the array. Nevertheless, the wire medium is another metamaterial that has a woodpile EBG-type structure [12,13].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Metamaterial for the Secondary Radar Antenna System

Khamsalee

Mesawad

Wongsan

2020

J Electromagn Eng Sci

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This paper proposes the gain enhancement of dual-band and dual-polarized asymmetric horn antenna for the secondary radar system using hybrid metamaterial techniques. The hybrid metamaterial is comprised of the structures of woodpile electromagnetic bandgap (EBG) for gain enhancement of the primary main beam of the radar system at the operating frequency of 1,300 MHz with horizontal polarization; and the wire medium structure that is placed beside the EBG structure for gain improvement of the identification friend or foe (IFF) main beam, which is operated at the center frequency of 1,060 MHz with vertical polarization. Meanwhile, the cooperated structures have to function to control the directions of the primary and IFF main beams retaining at 0° and 6°, respectively, too. When the hybrid metamaterial structure is placed at the front of an asymmetric horn’s aperture, with suitable parameters and optimized spacing, it is found to increase the gains of the two beams compared to the single asymmetric horn around 3 dB and retain the directions of original main beams. The comparison of the results between simulation and measurement, such as the reflected power (S<sub>11</sub>), gain, and radiation patterns, are in good agreement.

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Section: Introductionmentioning

confidence: 99%

Hybrid Metamaterial for the Secondary Radar Antenna System

Khamsalee

Mesawad

Wongsan

2020

J Electromagn Eng Sci

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Creating a Gain Improvement Technique for a Horn Antenna using a Metamaterial Structure Inserted with a Thin Dielectric Sheet

Kamphikul¹,

Mankong²,

Wongsan³

2019

TOEEJ

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Objective: This paper proposed a new technique for the metamaterial on the structure of the curved-woodpile Electromagnetic Band Gap (EBG) inserted with a dielectric slab for gain improvement in a conventional rectangular horn antenna. Methods: We described a method to enhance gain by transferring the electromagnetic fields from the aperture of a horn through the EBG structure. Furthermore, we present the design procedures for inserting a dielectric slab into two layers of the EBG structure for the reduction of distance between the horn and proposed EBG structure. Results and Conclusions: Such a proposed technique not only has the advantage of decreasing the total length of the antenna system but also providing higher gain with a low profile structure. This idea has been verified by both simulation and experimental results. The fabricated antenna can achieve 23.9 dBi of gain or higher than the gain, which is obtained using a conventional rectangular horn antenna at around 7 dBi at an operating frequency of 10 GHz. It is apparent that a good qualitative agreement between the measurements and simulations was achieved.

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Gain improvement for rectangular horn antenna by using curved-woodpile metamaterial

Cited by 2 publications

References 5 publications

Hybrid Metamaterial for the Secondary Radar Antenna System

Hybrid Metamaterial for the Secondary Radar Antenna System

Creating a Gain Improvement Technique for a Horn Antenna using a Metamaterial Structure Inserted with a Thin Dielectric Sheet

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