Toward High-Performance Wideband GNSS Antennas-Design Tradeoffs and Development of Wideband Feed Network Structure

Tamjid, Farshid; Foroughian, Farnaz; Thomas, Chris M.; Ghahreamani, Ahmadreza; Kazemi, Robab; Fathy, Aly E.

doi:10.1109/tap.2020.2983800

Cited by 21 publications

(12 citation statements)

References 23 publications

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“…To clearly explain the contribution of our work, a performance comparison with several state-of-the-art antennas (including wideband CP spiral) is summarized in Table II. As compared with the proposed antenna, the designs in [7], [8], [17], [18] and [19] show similar or wider IBW and AR bandwidth, but larger and more complex feeding networks were introduced in [7], [17], [18], and [19], and high profile of 0.24λ0 was employed in [8]. Besides, as another key performance, AR beamwidth were not taken into account in these works.…”

Section: Resultsmentioning

confidence: 99%

“…Generally, stacked or parasitic patches can be used to broaden AR bandwidth [4]- [5], but the achievable value is usually lower than 19% because of the inherent high Q-factor of patch antennas. External feeding networks and L-probe coupling techniques are introduced in [6]- [7] to further enhance the AR bandwidth, however, these methods unfortunately increase the overall size and complexity of the antennas as a byproduct. Besides, crossed-dipole antennas [8]- [9] can easily realize wideband CP feature, but they suffer from high profile of one quarter wavelength.…”

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confidence: 99%

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A Travelling-Wave-Fed Slot Spiral Antenna With Wide Axial-Ratio Bandwidth and Beamwidth for GNSS Applications

Zhong

Xiao

2021

IEEE Open J. Antennas Propag.

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A travelling-wave-fed slot spiral antenna with wide axial-ratio (AR) bandwidth and beamwidth for GNSS applications is proposed in this paper. The evolution procedure of the proposed antenna can be classified into three steps. Firstly, 12 identical spiral slots are arranged concentrically in a compact area, and AR roundness in low elevation plane is improved by virtue of good rotational symmetry of slot radiators. Secondly, a two-turn travelling-wave feed line is sequentially coupled to the slots, and wideband response of desired magnitude ratio and phase difference of Eθ and Eφ is obtained by optimizing the number and growth rate of microstrip turns. Thirdly, by supporting the antenna with a modified metallic cavity, the CP radiation performance in low elevation plane is well improved, and thus a widened AR beamwidth is obtained. Finally, the proposed antenna with satisfactory performance is realized in a diameter of 0.56λ0 and height of 0.12λ0, where λ0 is the free-space wavelength at center frequency 1.4 GHz. Measured bandwidth of |S11| fully covers the entire GNSS bands, and the 3-dB AR bandwidth ranges from 1.14 to 1.67 GHz (37.7%). Moreover, the 3-dB AR beamwidth exceeds 140° at 1.4 GHz. Index Terms-Axial ratio bandwidth, axial ratio beamwidth, circularly-polarized, travelling-wave-fed, wideband GNSS antenna.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

A Travelling-Wave-Fed Slot Spiral Antenna With Wide Axial-Ratio Bandwidth and Beamwidth for GNSS Applications

Zhong

Xiao

2021

IEEE Open J. Antennas Propag.

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“…To obtain dual-or multi-mode navigation, wideband or multi-band circular polarized (CP) antennas have been reported. For example, the crossed-dipole structure, 1 monopole structure, 2 wideband feed network, 3,4 meta-surface, 5 spiral-slot structure, 6 and coupling feed technology 7 are separately proposed for realizing wideband operation. While stacked structure, [8][9][10] frequency-reconfigurable technology, 11 and two-element conformal structure 12,13 are often investigated to cover multi-frequency bands for compatible with different navigation systems.…”

Section: Introductionmentioning

confidence: 99%

Design of triple‐band dual‐sense shared aperture circular polarized antenna for multimode BeiDou communication and navigation integration

Liu

Wang

et al. 2022

Int J RF Mic Comp-Aid Eng

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In the article, a triple-band dual-sense shared aperture circular polarized (CP) antenna is proposed for multimode BeiDou communication and navigation applications. By integrating the stub-loaded rectangle patch with the shorting-pin-loaded ring patch, the coverage of GPS L2, GPS L5, BDS-2 B2, BDS-2 B3, and BDS-1 L/S bands is realized. Besides, wideband filtering orthogonal feed network is adopted for feeding the ring patch to reduce the mutual coupling interference between the two patches. The slot-loaded ground plane is also employed for further decoupling. For validation, a prototype is designed, fabricated, and measured. The results indicate that the polarization of right-handed circular polarization (RHCP) is obtained at 1.2 GHz with a peak gain of 5.4 dBic for navigation service. While left-handed circular polarization (LHCP) and RHCP are realized at 1.615 GHz and 2.49 GHz, respectively, with the peak gains of 6.7 dBic and 7.4 dBic for communication service.

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“…But only the upper band realizes CP radiation, the lower band realizes linearly polarized radiation. Antennas 3,4 achieve wide impedance bandwidth and wide AR bandwidth by changing the feed structure, but this also causes the feed structure to be complex and difficult to fabricate. Because the patch antenna itself has a relatively narrow bandwidth and cannot cover the whole band of GNSS, the dipole antenna is mainly used.…”

Section: Introductionmentioning

confidence: 99%

Broadband circularly polarized tapered dipole antenna for GNSS applications

Zhao

et al. 2022

Int J RF Mic Comp-Aid Eng

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A broadband circularly polarized (CP) dipole antenna for global navigation satellite system (GNSS) is proposed. The antenna consists of a compact feed structure and four dipoles rotating in sequence. The series-fed power splitter network is adopted in the feed structure to achieve a 90 phase shift and four equal power outputs. Tapered dipoles are applied to the radiator to increase the impedance bandwidth, while blade-shaped parasitic patches are added next to each dipole to increase the axial ratio (AR) bandwidth. In order to increase the front-to-back ratio (FBR) of the antenna, a suitable circular hole is cut in the center of the reflector. Compared with the traditional reflector, the FBR is increased by about 5 dB on average in the whole band. The measurement results show that the impedance bandwidth with jS11j < À10 dB is about 51% (0.98-1.64 GHz), and the 3-dB AR bandwidth is about 35% (1.16-1.65 GHz). Detailed simulation and experimental results of radiation characteristics are presented and discussed.broadband, circularly polarized dipole antenna, high front-to-back ratio, sequential rotation

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Toward High-Performance Wideband GNSS Antennas-Design Tradeoffs and Development of Wideband Feed Network Structure

Cited by 21 publications

References 23 publications

A Travelling-Wave-Fed Slot Spiral Antenna With Wide Axial-Ratio Bandwidth and Beamwidth for GNSS Applications

A Travelling-Wave-Fed Slot Spiral Antenna With Wide Axial-Ratio Bandwidth and Beamwidth for GNSS Applications

Design of triple‐band dual‐sense shared aperture circular polarized antenna for multimode BeiDou communication and navigation integration

Broadband circularly polarized tapered dipole antenna for GNSS applications

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