Planar Endfire Circularly Polarized Antenna Using Combined Magnetic Dipoles

Lu, Wen‐Jun; Shi, Jing-Wen; Tong, Kin‐Fai; Zhu, Hongbo

doi:10.1109/lawp.2015.2401576

Cited by 95 publications

(49 citation statements)

References 21 publications

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“…Note that with the employment of the horn antenna instead of printed magnetic dipoles, the gain of the proposed antenna is significantly higher than those in Refs. . Radiation patterns at 11.9 GHz, 12.1 GHz and 12.3 GHz in both the xz‐ and yz ‐planes are shown in Figure and end‐fire beams are observed.…”

Section: Resultsmentioning

confidence: 92%

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Substrate integrated waveguide circularly polarized horn‐dipole antenna with improved gain

Luo

Børnemann

2016

Micro & Optical Tech Letters

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A substrate integrated waveguide (SIW) horn antenna is combined with a dipole to achieve circular polarization (CP). First, it is established that CP can be achieved by combining a horn and a dipole. To excite the dipole, double‐sided tapered and balanced transmission lines are employed at the central part of the horn aperture. Secondly, after the position and the size of the dipole are determined, a directional circularly polarized beam in the plane of the substrate is achieved. Finally, the proposed antenna is fabricated and measured. Experimental results are in good agreement with simulations. Measured results show that an effective bandwidth of 5% for axial ratio (AR) less than 3 dB and return loss (RL) better than 10 dB from 11.8 to 12.4 GHz is achieved. In particular, the maximum gain of the proposed antenna is as high as 7.5 dBi due to the design of the horn structure. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2973–2977, 2016

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Section: Resultsmentioning

confidence: 92%

“…However, this antenna does not permit low‐cost fabrications due to its three‐dimension (3D) structure. Printed magnetic dipoles combined with a loop or a linear dipole were designed and shown to exhibit directional beams parallel with substrates. However, the maximum gains of the two antennas are 2.6 dBi and 2.3 dBi.…”

Section: Introductionmentioning

confidence: 99%

Substrate integrated waveguide circularly polarized horn‐dipole antenna with improved gain

Luo

Børnemann

2016

Micro & Optical Tech Letters

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“…Let the monopole and the dipole are excited equally and separated by a distance of d . In that case equivalent electric field at a point P (distance r ) in the far field of the combined antennas would be given from as

E_{equiv .} = E_{false(λ / 4 false) monopole} + e^{- j}^{false(k d sin θ normalc} °^{normals ϕ + δ false)} E_{dipole}

…”

Section: Theoretical Conceptmentioning

confidence: 99%

“…End fire CP generation designs can be categorized into four types. These are turnstile structures , complementary dipoles , orthogonal dipoles , and orthogonal mode generation within radiator .…”

Section: Introductionmentioning

confidence: 99%

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End-fire bidirectional circularly polarized composite antenna

Bhattacharjee

Mitra

Chaudhuri

2017

Microw. Opt. Technol. Lett.

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A compact planar antenna with circular polarization (CP) along end fire direction is presented. End fire CP is achieved by the combination of patch equivalent electrical monopole and dipole antenna over the same substrate with a single feed. The calculated dimensions of the two antennas obtained through mathematical analysis are successful in achieving a perfect CP in the end fire direction provided a proper phase difference is maintained between them. Almost symmetrical bi‐directional radiation is obtained at both the end fire directions. Additional merits of the antenna include light weight, compactness, and simple design. The proposed antenna showed an enhanced axial ratio bandwidth of 22.2% with maximum gain of 3.54 dB. Mathematical analysis and simulation results were validated with experimental results for the given antenna. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1382–1388, 2017

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Planar endfire circularly polarized antenna using concentric annular sector complementary dipoles

Bai

You

et al. 2016

Int. J. RF Microw. Comput. Aided Eng.

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A novel planar endfire circularly polarized (CP) antenna is presented and explored by using concentric annular sector complementary dipoles. The antenna is composed of a semicircular disk radiator operating at TM 11 mode and a concentric annular sector dipole operating at one-half wavelength mode. A set of closed-form formulas is derived to reveal the operation principle and employed to determine the geometrical parameters of the proposed CP antenna. The design approach is both numerically and experimentally validated. Good agreement between the theoretical, numerical and experimental results has demonstrated its endfire radiation beam in parallel with its plane. The fractional impedance bandwidth for |S 11 | < 210 dB is up to 6.45%, and axial ratio (AR) bandwidth of less than 3 dB is up to 14.43% in fraction, in addition to its simple geometry with only seven design parameters. K E Y W O R D S circularly polarized antenna, complementary dipoles, endfire, planar antenna Int. J. RF Microw. Comput. Aided Eng. 2016; 26: 829-838 wileyonlinelibrary.com/journal/mmce V C 2016 Wiley Periodicals, Inc. | 829

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Planar Endfire Circularly Polarized Antenna Using Combined Magnetic Dipoles

Cited by 95 publications

References 21 publications

Substrate integrated waveguide circularly polarized horn‐dipole antenna with improved gain

Substrate integrated waveguide circularly polarized horn‐dipole antenna with improved gain

End-fire bidirectional circularly polarized composite antenna

Planar endfire circularly polarized antenna using concentric annular sector complementary dipoles

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