A Novel Planar Endfire Circularly Polarized Antenna With Wide Axial-Ratio Beamwidth and Wide Impedance Bandwidth

You, Man; Lu, Wen‐Jun; Bai, Xue; Li, Zhu; Zhu, Hongbo

doi:10.1109/tap.2016.2593929

Cited by 59 publications

(39 citation statements)

References 31 publications

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“…The prototype is designed on a substrate with relative permittivity of ɛ r = 2.65, tan δ = 0.001, and thickness H = 1.0 mm. A nonuniform loop configuration is employed to tune the led/retarded phase difference between the currents propagating along the adjacent arms . In practical implementation, a balun is required to accomplish the connection between the antenna and the instruments as described in .…”

Section: Results and Validationmentioning

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: Results and Validationmentioning

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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“…Alternatively, the peripheral E‐fields distributions along the thickness or height direction of the system printed circuit board (PCB) should be employed to contribute primary radiation. As shown in Figure , the resultant antenna element of the proposed MIMO system is a microstrip magnetic dipole antenna at its basic form that has one edge opened, and with the other three edges shorted to the ground plane by using via‐holes . In this way, a virtual magnetic current distribution will be generated on the aperture, that is, the edge of the PCB.…”

Section: Theory and Design Approachmentioning

confidence: 99%

“…In addition, the center frequencies of the antenna elements are also slightly shifted downward of less than 4%. In practical designs, such a minor frequency shift can be eliminated by carefully adjusting the length of the magnetic dipole …”

Section: Antenna Design and Parametric Studiesmentioning

confidence: 99%

Conceptual design and implementation of a four‐element MIMO antenna system packaged within a metallic handset

Gao

2018

Micro & Optical Tech Letters

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The conceptual design of a multiple input multiple output (MIMO) antenna system packaged within a metallic handset for future wireless communications is proposed, simulated, and implemented. The presented MIMO antenna system is composed of four‐identical slotted microstrip magnetic dipoles. The whole antenna system is installed within an emulated handset with a metallic back cavity and frames. A few antenna prototypes are fabricated and measured to validate the conceptual design. Owning to the inherent microstrip magnetic dipole configuration, the packaged MIMO antenna system exhibits a good impedance matching, a high element isolation, an acceptable average radiation efficiency of about 40%, and a wide beam coverage performance at 3.5 GHz‐band. Compared to conventional single input single output (SISO) wireless communication systems, the channel capacity can be nearly tripled by employing the designed MIMO handset.

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“…To reduce the profile of CP antenna, some printed complementary antennas have been proposed in Refs. . In Ref.…”

Section: Introductionmentioning

confidence: 99%

A planar end‐fire circularly polarized complementary Yagi antenna

Dong

Wang

Liu

2019

Micro & Optical Tech Letters

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A novel end‐fire circularly polarized (CP) antenna is presented by integrating a vertically polarized magnetic Yagi array, a horizontally polarized electric Yagi array, various lengths of the directors and common driven elements. Slots with nine Jesus crosses are etched on the common driven elements to extend the impedance matching bandwidth of magnetic Yagi array, while various length of directors are employed to obtain wide axial ratio (AR) bandwidth. The designed CP antenna is both numerically and experimentally validated, and experimental results agree well with electromagnetic simulated results. The fractional impedance bandwidth for ∣S 11∣ < 10 dB is up to 20.7%, and AR bandwidth of less than 3 dB is up to 16.0% in fraction.

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A Novel Planar Endfire Circularly Polarized Antenna With Wide Axial-Ratio Beamwidth and Wide Impedance Bandwidth

Cited by 59 publications

References 31 publications

Balanced circularly polarized square loop antenna under even-mode resonance

Balanced circularly polarized square loop antenna under even-mode resonance

Conceptual design and implementation of a four‐element MIMO antenna system packaged within a metallic handset

A planar end‐fire circularly polarized complementary Yagi antenna

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