Broadband Millimeter-Wave Circularly Polarized Open-Ended Waveguide Antenna Using Stubs and Its Application in Forming an Array

Zhang, Jingyi; Chen, Qiaoyu; Wu, Wen; Fang, Da‐Gang

doi:10.1109/tap.2022.3216496

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…12 Two stubs employed at the open-end of the waveguide were very effective in adjusting the phase and amplitude of the orthogonal fields. 13 A pair of strip-shaped patches were etched on the top surface of the substrate integrated waveguide (SIW) cavity to adjust the phases of TM 211 and TM 121 modes and achieve CP to the antenna array. 14 It should be concluded that almost all the techniques mentioned above to achieve CP radiation in waveguide antennas often cost the antennas extra structures or circuits, increasing their volume and complexity.…”

Section: Introductionmentioning

confidence: 99%

“…Two parallel plates acting like a waveguide were used to feed an array of septum polarisers 12 . Two stubs employed at the open‐end of the waveguide were very effective in adjusting the phase and amplitude of the orthogonal fields 13 . A pair of strip‐shaped patches were etched on the top surface of the substrate integrated waveguide (SIW) cavity to adjust the phases of TM 211 and TM 121 modes and achieve CP to the antenna array 14 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A low‐profile circularly polarized cavity‐based waveguide aperture antenna

Mahmud,

Mohammed,

Jarjees

et al. 2024

Micro & Optical Tech Letters

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This article proposes a new design of a circularly polarized (CP) aperture antenna based on a dual‐mode rectangular waveguide cavity‐resonator. A capacitive iris is employed to attain a strong coupling between the cavity and the input port, resulting in a larger fractional bandwidth (FBW) than a conventional aperture antenna. Another capacitive iris is embedded at the corner of the radiating aperture and extended into the cavity to maintain equal amplitude and a phase difference of 90° between the radiated electric (E) fields of the TE101 and TE110 modes, and thus yielding CP radiation. The proposed antenna has been fabricated using a computer numerical control machine. The antenna has an FBW of 18% at center frequency (f0) f0 = 10 GHz when the reflection coefficient (S11) S11 = −10 dB. The 3‐dB axial ratio bandwidth is 7%. A gain of 8.0 dBic is found at 10.06 GHz. The low profile and competitive performance of the antenna make it a good candidate in radar applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A low‐profile circularly polarized cavity‐based waveguide aperture antenna

Mahmud,

Mohammed,

Jarjees

et al. 2024

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…Besides the AR bandwidth, gain, manufacturing process, and cost, there are other considerations, including antenna structures [27]- [30], application scenarios [31], multibeam arrays [32], [33], reconfigurable characteristics [34], dual-CP [35]- [37], and bidirectional radiation [38], [39], etc. A nonplanar helix antenna was investigated in [28] which radiates an end-fire CP wave and obtains an AR bandwidth of up to 46%.…”

Section: Introductionmentioning

confidence: 99%

Millimeter Wave Planar Wideband Circularly Polarized Antenna Loaded Triangular Patch for End-Fire Radiation

Xu,

Sima,

Wei

et al. 2023

IEEE Access

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A planar wideband circularly polarized (CP) end-fire antenna is presented for millimeter-wave (mm-wave) applications. First, the antenna consists of an open-ended substrate integrated waveguide (SIW) feeding line in the middle, a pair of stacked substrates with shorted triangular patches on both upper and lower sides, and an offset parallel strip. The shorted triangular patch is viewed as a horizontally polarized electric dipole, while the open-ended SIW is equivalent to an enhanced magnetic dipole due to the stacked substrates. Wide axial ratio (AR) performance is achieved by simultaneously exciting the two dipoles with orthogonal phase supplied by the offset parallel strip. Then, working principle and parameter analysis are explained and discussed for a further understanding. Finally, a prototype is fabricated and measured to verify the design scheme, which demonstrates wideband impedance bandwidth and AR bandwidth performance, novel and efficient radiating structure, simple and small antenna size. This indicates that the proposed antenna is a promising candidate to design wideband end-fire CP antenna in the mm-wave frequency band.INDEX TERMS Circularly polarized, end-fire antenna, millimeter wave, triangular patch.

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A Circularly Polarized Strip Dipole Antenna Array With Working Bandwidth Above 40% for Wireless and Satellite Communications

Tan,

Fan,

et al. 2024

Antennas Wirel. Propag. Lett.

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Broadband Millimeter-Wave Circularly Polarized Open-Ended Waveguide Antenna Using Stubs and Its Application in Forming an Array

Cited by 4 publications

References 21 publications

A low‐profile circularly polarized cavity‐based waveguide aperture antenna

A low‐profile circularly polarized cavity‐based waveguide aperture antenna

Millimeter Wave Planar Wideband Circularly Polarized Antenna Loaded Triangular Patch for End-Fire Radiation

A Circularly Polarized Strip Dipole Antenna Array With Working Bandwidth Above 40% for Wireless and Satellite Communications

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