A curl antenna

Nakano, Hisamatsu; Okuzawa, S.; Ohishi, K.; Mimaki, H.; Yamauchi, Junji

doi:10.1109/8.267357

Cited by 153 publications

(62 citation statements)

References 10 publications

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“…The curved section is defined by the Archimedean spiral function, where the periphery of the outermost curved section is chosen to be more than two wavelengths at an operation frequency. Therefore, this radiation element is regarded as an extended version of the curl antenna [10] or a simplified version of the two-wire Archimedean spiral antenna [11].…”

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confidence: 99%

A monofilar spiral antenna and its array above a ground plane-formation of a circularly polarized tilted fan beam

Nakano

Shinma

Yamauchi

1997

IEEE Trans. Antennas Propagat.

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Abstract-A monofilar spiral antenna is analyzed in the presence of a conducting plane reflector, using the method of moments. The circumference of the spiral antenna is chosen to be 2.3 wavelengths. A tilted beam of circular polarization is realized by superposing the fields from two active regions. The gain of the tilted beam is approximately 8 dB. The frequency bandwidths for 1-dB gain drop and 3-dB axial ratio criterions are 12% and 23%, respectively. An array consisting of the four monofilar spiral antennas is also analyzed, where the array element spacing is chosen to be 0.8 wavelength at a design frequency f 0 . The input impedances of the four spirals are almost the same as the impedance of the single monofilar spiral antenna at f 0 . The array radiates a tilted fan beam with a gain increase of approximately 6 dB from the gain of the single spiral antenna at f0. The frequency bandwidth for a 3-dB axial ratio criterion is almost the same as that of the single spiral antenna.

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A monofilar spiral antenna and its array above a ground plane-formation of a circularly polarized tilted fan beam

Nakano

Shinma

Yamauchi

1997

IEEE Trans. Antennas Propagat.

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“…In this RWPFAA, the pin-fed radiating elements were long helices. Similar RWPFAAs, but with low profile helical and curl radiating elements, were later suggested by Nakano et al [2,3]. At about the same time, Haneishi and Saito described an RWPFAA with microstrip radiating elements [4].…”

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confidence: 64%

On Reducing the Phase Errors in the Aperture of a Radial Waveguide Pin-Fed Non-Resonant Array Antenna

Pazin¹,

Leviatan²

2007

PIER

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Abstract-With a proper design, the aperture field of a conventional radial waveguide pin-fed non-resonant array antenna (RWPFAA) can be rendered equiphase at a given central frequency. However, when the operating frequency deviates from this central frequency, the aperture field will exhibit an undesired conical phase error. To alleviate this problem, we propose a novel design in which the frequency-dependent aperture phase error distribution is rendered serrated. The gain and side-lobes of an RWPFAA with serrated phase error distributions are studied by resorting a simple model of a line source as well as a more representative model of a circular aperture. The theoretical results are supplemented by numerical data. Schemes of RWPFAAs comprising two and three sections, which render the phase error distribution in the antenna aperture serrated, are suggested.

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“…The annular region of the arm has a total length of 175.7 mm (1.37λg). This satisfies the criteria of a curl antenna (λg < arm length < 2λg) [27]. Note that a straight-line section of length L0 = 7 mm is added to the arm to increase a horizontal current for attaining a better axial ratio.…”

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A Four-Arm Circularly Polarized High-Gain High-Tilt Beam Curl Antenna for Beam Steering Applications

Zhou

Pal

Mehta

et al. 2018

Antennas Wirel. Propag. Lett.

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A curl antenna

Cited by 153 publications

References 10 publications

A monofilar spiral antenna and its array above a ground plane-formation of a circularly polarized tilted fan beam

A monofilar spiral antenna and its array above a ground plane-formation of a circularly polarized tilted fan beam

On Reducing the Phase Errors in the Aperture of a Radial Waveguide Pin-Fed Non-Resonant Array Antenna

A Four-Arm Circularly Polarized High-Gain High-Tilt Beam Curl Antenna for Beam Steering Applications

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