Four-Arm Sinuous Antenna With Low Input Impedance for Wide Gain Bandwidth

Kim, Dong-Hyun; Park, Chan Yeong; Kim, Young-Wan; Kim, Hyun; Yoon, Young Joong

doi:10.1109/access.2022.3163821

Cited by 7 publications

(6 citation statements)

References 30 publications

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“…Table 2 presents a comparative analysis between the proposed sinuous antenna and prior research on sinuous antennas. Notably, previous studies have explored sinuous antennas with wide bandwidth characteristics [22][23][24]27,28,37]. Other research groups have used lenses to achieve high gain [38,39] or improved the cross-polarization isolation of the antenna [40].…”

Section: Experiments and Discussionmentioning

confidence: 99%

“…It was initially introduced by Duhamel in 1987 [20]. Using frequency-independent characteristics, sinuous antennas were found to be suitable for various applications such as UWB radar [21][22][23], GPR [24,25], electromagnetic pulse (EMP) [26], electronic support measures (ESMs) [27], and direction-finding systems [28,29]. However, the antennas studied were designed to meet the performance requirements of the application, and the sizes of the antennas were not considered.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, its application to various scenarios can be challenging due to its larger size. To address this challenge, researchers have attempted to apply the gap-loading technique to conventional sinuous antenna designs [27,30] or modify sinuous curve designs to enable miniaturization [23].…”

Section: Introductionmentioning

confidence: 99%

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Miniaturization and Bandwidth Enhancement of Fractal-Structured Two-Arm Sinuous Antenna Using Gap Loading with Meandering

Kim,

Keun,

Yoo

et al. 2023

Fractal Fract

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A sinuous antenna is a frequency-independent antenna known for its wide bandwidth and consistent gain, which makes it valuable in broadband applications such as ultrawideband (UWB) radar and ground-penetrating radar (GPR). However, sinuous antennas tend to be rather large. Consequently, numerous studies have explored miniaturization methods, with the gap-loading method emerging as a prominent approach. Unfortunately, it is still difficult to achieve broad bandwidths for conventional miniaturized sinuous antennas. In this paper, we use a novel approach incorporating a meander shape into the sinuous curve and employing gap loading with meandering. This innovative technique results in the development of a fractal-structured two-arm sinuous antenna characterized by an ultra-compact size and significantly expanded bandwidth. Adding a meander line in the outermost part maximizes the capacitance, thereby enhancing the gap-loading effect and minimizing the overall size of the sinuous antenna. In addition, the introduction of an inner meander line increases the inductance, contributing to a further expansion of the antenna’s bandwidth. For example, the electrical length of the antenna without the meander line is 0.552 × 0.552 × 0.052 λg3, while the electrical length of the antenna with the meander line is only 0.445 × 0.445 × 0.036 λg3, i.e., 19.4% smaller. The antenna lacking the outermost meander line exhibits a 10 dB impedance bandwidth, spanning from 0.74 to 10.53 GHz. In contrast, the antenna featuring the outermost meander line has a 10 dB impedance bandwidth, extending from 0.51 to 10.72 GHz, which results in a remarkable enhancement in the fractional bandwidth (by 8.1%). Hence, the proposed antenna design is a good candidate for broadband applications that require miniaturization.

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Section: Experiments and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Miniaturization and Bandwidth Enhancement of Fractal-Structured Two-Arm Sinuous Antenna Using Gap Loading with Meandering

Kim,

Keun,

Yoo

et al. 2023

Fractal Fract

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show abstract

“…The antenna diameter was 250 mm, and a ground plane of dimension 250 mm × 250 mm, 30 mm behind the slot antenna was employed to achieve a directive radiation pattern. The antenna proposed in [21] had an impedance bandwidth in the range of 0.45 GHz-6 GHz with a reference impedance of 100 ohms and a diameter of about 290 m. The performance of the fabricated antenna with wideband balun was verified evidencing a gain between −1 dBi and 5.5 dBi.…”

Section: Introductionmentioning

confidence: 95%

An Antipodal Vivaldi Antenna for a Drone-mounted Ground Probing Radar

Pisa,

Pastori,

Cicchetti

et al. 2024

PIER M

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An antenna operating between 300 MHz and 700 MHz, designed to be used on a ground penetrating radar installed on an Unmanned Aerial Vehicle (UAV) for the exploration and characterization of the buried ice deposits on Mars, is presented. To this end, a lightweight, high-gain Vivaldi antenna having compact dimensions and high operating bandwidth has been taken into consideration. This antenna, equipped with circular-loaded rectangular slots etched on its radiating arms, exhibits improved performance in terms of size, return loss, gain, and fidelity factor with respect to a conventional antipodal Vivaldi antenna. Experimental measurements performed on a prototype of the Vivaldi antenna with slots showed a return loss lower than −12 dB with realized gains between 4 dBi and 6.5 dBi in the 300-700 MHz frequency band.

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“…However, in antennas that use EBG characteristics, antenna radiation performance deterioration is observed near the EBG band. The impedance bandwidth is still narrow compared to the absorber-filled cavity-backed structures, making them unsuitable for ESM systems [25]. Like the various types of reflectors mentioned above, high gain and wide gain bandwidth cannot be achieved through these simple structures.…”

Section: Introductionmentioning

confidence: 99%

Four-Arm Log-Periodic Toothed Antenna With Hybrid Reflector Composed of Inhomogeneous Metamatarial Elements for Electronic Support Measures

Kim,

Park,

Lee

et al. 2023

IEEE Access

Self Cite

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A novel method of enhancing radiation performance is demonstrated by applying a hybrid reflector composed of inhomogeneous metamaterial elements to a four-arm log-periodic toothed antenna. The operation of the antennas by various metamaterial cells is observed, and the causes of the radiation performance deterioration and narrow bandwidth are investigated through the field distribution analysis. The metamaterial cells are arranged in suitable positions under the antenna for good radiation performance and wide bandwidth according to AMC and EBG characteristics. In the proposed hybrid reflector, surface wave suppression characteristics are used for impedance stabilization by placing the I-shaped EBG cell under the inactive region of the antenna. The performance of the fabricated antenna with dual linear polarization capability is verified by measuring co-and cross-polarization radiation patterns. The newly proposed hybrid reflector for the four-arm log-periodic toothed antenna represents an over 4 dBi realized gain within an impedance ratio bandwidth of over 11.6:1.INDEX TERMS Four-arm LP-toothed antenna, electronic support measures, wide gain bandwidth, metamaterial, high impedance surface, artificial magnetic conductor, electromagnetic bandgap.

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Four-Arm Sinuous Antenna With Low Input Impedance for Wide Gain Bandwidth

Cited by 7 publications

References 30 publications

Miniaturization and Bandwidth Enhancement of Fractal-Structured Two-Arm Sinuous Antenna Using Gap Loading with Meandering

Miniaturization and Bandwidth Enhancement of Fractal-Structured Two-Arm Sinuous Antenna Using Gap Loading with Meandering

An Antipodal Vivaldi Antenna for a Drone-mounted Ground Probing Radar

Four-Arm Log-Periodic Toothed Antenna With Hybrid Reflector Composed of Inhomogeneous Metamatarial Elements for Electronic Support Measures

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