A Size-Reduced, Circularly Polarized, Log-Periodic Dipole Array

Leon, Kevin A; Haney, Joshua B; Lim, Su Jun

doi:10.1109/lawp.2021.3131974

Cited by 2 publications

(5 citation statements)

References 16 publications

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“…This is because our proposed antenna does not utilize a large metal reflector. In [23] and [24], the antennas are designed based on unequal length crossed dipole. Differently, our proposed antenna is designed based on equal length crossed dipole.…”

Section: Discussionmentioning

confidence: 99%

“…The peak gain is benefited from the larger size to some extent. It is worth mentioning that the size reduction methods in [23] and [24] can be applied to our proposed antenna to reduce the size. This article proposes a detailed investigation of CP LPDA.…”

Section: Discussionmentioning

confidence: 99%

“…The CP line arrays based on LPDA have no bandwidth limiting factors other than dipole length ideally. The investigation of CP LPDA is limited and only a few researches has focused on the realization of CP LPDA [23], [24], [25]. In [23], a set of crossed dipoles with a distance logarithmically increased was proposed.…”

Section: Introductionmentioning

confidence: 99%

“…The investigation of CP LPDA is limited and only a few researches has focused on the realization of CP LPDA [23], [24], [25]. In [23], a set of crossed dipoles with a distance logarithmically increased was proposed. Each crossed dipole cell contains two dipoles with different lengths to realize CP.…”

Section: Introductionmentioning

confidence: 99%

“…Different from [23], [24], [25], crossed dipole with equal length is employed in the proposed CP LPDA. The CP radiation is achieved by separating the crossed dipoles with a distance of λ/8.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Investigation of a Circularly Polarized Log-Periodic Dipole Antenna

Wei,

Zhang,

Sun

et al. 2024

IEEE Open J. Antennas Propag.

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In this letter, a circularly-polarized (CP) log-periodic dipole antenna (LPDA) is investigated. Eight crossed dipole cells with a logarithmically increased λ/8 separation are employed to form the proposed CP LPDA. The dipoles with increased length and spacing are fed in series by an air-filled parallel line. The working mechanism of the generation of back-fire CP radiation is illustrated by an array analyzation. Besides, the LPDA design factors for both polarizations are analyzed in detail to realize an optimized CP performance. To validate the performance of the proposed eight-element CP LPDA, a prototype was fabricated and measured. The measured axial ratio (AR) bandwidth (0.8-2.5 GHz) is coincident with the impedance bandwidth (0.8-2.43 GHz), and it can be further increased with more elements. The overlapping bandwidth with VSWR < 2, AR < 3 dB, gain variation < 3 dB, and back-fire gain > 5 dBic is 0.94-2.43 GHz (2.6:1), and the radiation pattern is stable across the entire band.INDEX TERMS Circularly-polarized (CP), frequency independent, log-periodic dipole antenna (LPDA), wideband.L

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%