Crossed Dipole Antennas: A review

Ta, Son Xuat; Park, Ikmo; Ziolkowski, Richard W.

doi:10.1109/map.2015.2470680

Cited by 157 publications

(73 citation statements)

References 76 publications

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“…When the circumference of a helix is approximately approaching to about one guided‐wavelength, the axial mode is excited and an endfire CP beam is resulted in. The second one is the cross‐dipole CP antenna . A pair of orthogonal dipoles is excited with equal magnitude and in quadrature‐phase to realize CP radiation.…”

Section: Introductionmentioning

confidence: 99%

Balanced circularly polarized square loop antenna under even-mode resonance

Yuan

Gao

et al. 2018

Int J RF Microw Comput Aided Eng

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Design approach to a novel balanced, circularly polarized (CP) square loop antenna under even‐mode resonance is proposed in this paper. The loop antenna is diagonally fed by a fork‐like dipole launcher. By matching the respective natural boundary condition of the loop radiator and the dipole launcher, the resonant even‐mode with inherent CP radiation characteristic can be sufficiently excited. Both the bi‐ and uni‐directional cases are designed and investigated. A bi‐directional CP loop antenna with a 3‐dB ratio axial ratio (AR) bandwidth of 6.6% is designed at first. A uni‐directional antenna having a planar metallic reflector is further designed. The uni‐directional loop antenna exhibits excellent uni‐directional CP performance with a high front‐to‐back ratio of 40dB and a 3‐dB AR bandwidth of 7.6% in both theory and experiment.

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Section: Introductionmentioning

confidence: 99%

Balanced circularly polarized square loop antenna under even-mode resonance

Yuan

Gao

et al. 2018

Int J RF Microw Comput Aided Eng

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“…The parasitic patches were printed on the top side of substrate 1. The crossed dipoles were built on both sides of substrate 2 and are directly fed by the 50 Ω coaxial line [12]. The crossed dipoles included double vacant quarter-printed rings to produce the CP radiation.…”

Section: Crossed-dipole Antenna Loaded With Parasitic Patchesmentioning

confidence: 99%

“…On the other hand, a single-feed crossed-dipole antenna is a common, modern antenna used to produce circularly polarized (CP) radiation [12]. CP radiation is obtained when the length of the dipoles satisfies the following conditions: the real parts of their input admittances are equal and the phase angles of their input admittances differ by 90° [13].…”

Section: Introductionmentioning

confidence: 99%

“…However, the crossed-dipole antennas equipped with a metallic reflector suffers from a large profile, which is approximately λ/4. This problem has been overcome by using an artificial surface instead of the metallic reflector, see [12] and the references therein. Further, several studies have demonstrated that surface waves propagating on a finite artificial surface when excited generate extra CP radiation for the crossed-dipole antenna, which can be employed for extending the antenna bandwidth [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Bandwidth-Enhanced Low-Profile Antenna with Parasitic Patches

Kedze

2017

International Journal of Antennas and Propagation

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This paper presents low-profile broadband antennas, which are composed of four parasitic patches placed between planar radiators and a perfect electric conductor ground plane. Two types of planar radiators, a conventional dipole and a crossed dipole, are employed to produce linearly polarized (LP) and circularly polarized (CP) radiations, respectively. The radiator and parasitic patches are realized on thin substrates to lower the cost. Owing to the presence of parasitic patches, the antenna performance improves in terms of profile reduction, resonant frequency decrease, and bandwidth enhancement. These improvements are discussed and confirmed computationally and experimentally. The LP design with the overall dimensions of 120 mm × 120 mm × 16.3 mm (0.64λ 0 × 0.64λ 0 × 0.087λ 0 at 1.6 GHz) has a |S 11 | < −10 dB bandwidth of 1.465-1.740 GHz (17.2%), a broadside gain of 8.5-8.8 dBi, and a radiation efficiency > 96%. The CP design, which has the same physical size as the LP case, has a |S 11 | < −10 dB bandwidth of 1.388-1.754 GHz (23.3%), a 3 dB AR (axial ratio) bandwidth of 1.450-1.685 GHz (15.0%), a right-hand CP broadside gain of 7.8-8.7 dBic, and a radiation efficiency > 90%.

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“…However, the configurations of these CP antennas are complicated, and it is difficult to implement them for multi-band operations or to provide a bandwidth enhancement. A crossed-dipole antenna is a common, modern antenna used to produce CP radiation [12]. Recently, some advances in the design of single-feed crossed-dipole antennas, such as their miniaturization and multi-band operation, were reported [13]- [16].…”

Section: Introductionmentioning

confidence: 99%