Wide-beam circularly polarized microstrip antenna with high front-to-back ratio for CNSS application

Yuan, Yuan; Wang, Min; Yin, Yu-Feng; Wu, Wen

doi:10.1109/apcap.2017.8420318

Cited by 6 publications

(6 citation statements)

References 9 publications

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“…Table 1 illustrates the performance comparisons between the proposed antenna and the previously reported representative wide‐beam CP antennas. In comparison with the works in Zheng et al, 3,9 Luo et al, 23 and Yuan et al, 20 the proposed antenna shows wider AR bandwidth. While the HPBW is also larger than the work in Zheng et al, 3,9 and Luo et al 23 Although the work in Liu et al 24 and Yuan et al 20 exhibits wider HPBW, the size is larger than the proposed one.…”

Section: Fabrication and Experimental Resultsmentioning

confidence: 55%

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Design of circularly polarized antenna with wide overlapped axial‐ratio and gain beamwidths for upper hemispherical coverage

Ren,

Liu,

et al. 2024

Micro & Optical Tech Letters

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In this letter, a circularly polarized antenna with wide overlapped axial ratio and gain beamwidth is proposed for upper hemispherical coverage. By bending half of the dipoles to the vertical direction, and connecting eight metal columns to the ground, the half‐power beamwidth (HPBW) of all cut planes can be increased effectively. On the basis, one reactive impedance structure is applied as the reflector to achieve unidirectional radiation, as well as increase the 3‐dB axial ratio beamwidth (ARBW) of the antenna. Miniaturized four‐feed networks are utilized to provide excitation, and the shielding technique is applied to reduce its influences on the antenna radiation performances. Measurements show that the proposed antenna can operate in the range of 1.51–1.59 GHz, which covers the upper band of global navigation satellite system (GNSS). Besides, at 1.561 GHz, the measured HPBWs and 3‐dB ARBWs are larger than 131° and 135° in all cut planes. The wide overlapped beamwidth of the proposed antenna with small size indicates the potential applications in high‐precision GNSS navigations.

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Section: Fabrication and Experimental Resultsmentioning

confidence: 55%

“…However, due to the use of dielectric lens, there exists the drawbacks of large size and heavy weight. In Yuan et al, 20 parasitic strips and reflectors are loaded to broad both the HPBW and the 3‐dB ARBW. Measurement results show that the HPBW and 3‐dB ARBW are 147° and 180°, separately.…”

Section: Introductionmentioning

confidence: 99%

Design of circularly polarized antenna with wide overlapped axial‐ratio and gain beamwidths for upper hemispherical coverage

Ren,

Liu,

et al. 2024

Micro & Optical Tech Letters

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show abstract

“…Similar with the analysis in section A, the final AR in air should be expressed by the new polar angle θ , which is equal to θ t2 . Hence, the angles of θ, θ i1 , θ t1 , θ i2 in (10) should be expressed as functions of θ t2 by using (11).…”

Section: Theoretical Analysis Of Ar For Proposed Lensmentioning

confidence: 99%

“…However, this approach suffers from complexity in geometric structure. The second approach is to compensate vertical current components at low elevation, such as horizontal dipoles and vertically attached top-hat elements [5], parallel dipoles [6], [7], parasitic elements [8]- [11] and crossed-dipole antennas [12], [13]. High purity of circular polarization and better 3-dB ARBW performance are gained by this method.…”

Section: Introductionmentioning

confidence: 99%

3-D-Printed Dielectric Lens With Cone-Shaped Cavity for Axial Ratio Beamwidth Enhancement of Circularly Polarized Patch Antenna

Fang

Wang

et al. 2019

IEEE Access

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A 3-D-printed dielectric lens is proposed in this paper to widen the 3-dB axial-ratio beamwidth (ARBW) of conventional circularly polarized (CP) patch antenna. The proposed lens is constructed by a solid dielectric cylinder with a cone-shaped air cavity. To illustrate the working principle, the geometric optics method is introduced, then refractions of the CP wave caused by the lens are theoretically analyzed and the related equations of axial ratio (AR) are derived. Besides, the key parameters that affect the ARBW of the CP antenna are adequately investigated, and the general rules are summarized to design it conveniently. To provide two orthogonal modes at center frequency, a dual-feed network is used to drive the patch antenna. To demonstrate, prototypes with and without lens are designed, fabricated, and measured. The experimental results show a good agreement with the simulated ones in terms of returned loss, radiation pattern, gain, and AR. The measured 15-dB impedance bandwidth is 20.4%, the 3-dB AR bandwidth is 17.5%, and the peak gain at main radiated direction is 5.5 dBic. Furthermore, the compared results in measurements show that by using the proposed lens, the 3-dB ARBW of CP antenna can be extended effectively from 82 • to 162 • , which is highly demanded in global navigation satellite system for reducing multipath interference. Finally, the applicability of the proposed lens is discussed including the available frequency bandwidth, the size of ground plane, and the feasibility for other types of CP patch antennas. INDEX TERMSCircularly polarized (CP) patch antenna, dielectric lens, wide axial-ratio beamwidth (ARBW).

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“…Recently, a parasitic ring is stacked on the radiation patch to effectively widen the HPBW to 140° [7]. Parasitic strips [8] are also proposed to achieve wide HPBW. Nevertheless, these technologies [3][4][5][6][7] are presented for single-band applications.…”

Section: Introductionmentioning

confidence: 99%

Beamwidth-Enhanced Low-Profile Dual-Band Circular Polarized Patch Antenna for CNSS Applications

Liu

Xun

Fang

et al. 2019

International Journal of Antennas and Propagation

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A low-profile dual-band circular polarized (CP) patch antenna with wide half-power beamwidths (HPBWs) is presented for CNSS applications. Simple stacked circular patches are used to achieve dual-band radiation. To enhance the HPBW for the two operation bands, a dual annular parasitic metal strip (D-APMS) combined with reduced ground plane (R-GP) is presented. A single-input feed network based on the coupled line transdirectional (CL-TRD) coupler is also proposed to provide two orthogonal modes at the two frequency bands simultaneously. Experimental results show that the 10 dB impedance bandwidth is 32.7%. The 3 dB axial ratio (AR) bandwidths for the lower and upper bands are 4.1% and 6.5%, respectively. At 1.207 GHz, the antenna has the HPBW of 123° and 103° in the xoz and yoz planes, separately. And the values are 127° and 113° at 1.561 GHz.

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Wide-beam circularly polarized microstrip antenna with high front-to-back ratio for CNSS application

Cited by 6 publications

References 9 publications

Design of circularly polarized antenna with wide overlapped axial‐ratio and gain beamwidths for upper hemispherical coverage

Design of circularly polarized antenna with wide overlapped axial‐ratio and gain beamwidths for upper hemispherical coverage

3-D-Printed Dielectric Lens With Cone-Shaped Cavity for Axial Ratio Beamwidth Enhancement of Circularly Polarized Patch Antenna

Beamwidth-Enhanced Low-Profile Dual-Band Circular Polarized Patch Antenna for CNSS Applications

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