Compact Dual-Band Circularly Polarized Patch Antenna With Wide 3-Db Axial Ratio Beamwidth for Beidou Applications

Li, Hongmei; Xun, Chenhui; Fang, Shaojun; Wang, Zhongbao

doi:10.2528/pierm19090502

Cited by 8 publications

(11 citation statements)

References 23 publications

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“…Also, 'O' in the 2-dimensional axial ratio indicates whether the antenna can have an axial ratio below 3 dB in the 2-dimensional region, a 360 • azimuth angle and elevation angle from -60 • to 60 • . The CP antennas in [14][15][16][17][18] have a narrow bandwidth wide-angle axial ratio. Furthermore, the 2-dimensional axial ratio region was rarely studied in [15][16][17][18][19].…”

Section: Implementation and Measurementmentioning

confidence: 99%

“…The CP antennas in [14][15][16][17][18] have a narrow bandwidth wide-angle axial ratio. Furthermore, the 2-dimensional axial ratio region was rarely studied in [15][16][17][18][19]. In particular, the antenna in [20] is not suitable for low profile antenna applications.…”

Section: Implementation and Measurementmentioning

confidence: 99%

“…Also, when the wide frequency bandwidth of the satellite communication is employed, a wideband CP antenna with wide axial ratio beamwidth is required [13]. For wide axial ratio performance, some researchers have proposed low profile CP antennas [14][15][16][17][18][19][20]. In [14], a single fed CP antenna with stepped arc-shaped arms was presented.…”

Section: Introductionmentioning

confidence: 99%

“…However, these antennas have narrow axial ratio bandwidth. In [16][17], dual-band CP antennas were investigated. A compact CP antenna with an annular metal strip loaded ground plane was employed for wide axial ratio beamwidth [16].…”

Section: Introductionmentioning

confidence: 99%

“…In [16][17], dual-band CP antennas were investigated. A compact CP antenna with an annular metal strip loaded ground plane was employed for wide axial ratio beamwidth [16]. The annular metal strips served as parasitic radiators on the ground and improved the axial ratio beamwidth.…”

Section: Introductionmentioning

confidence: 99%

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Wideband Circularly Polarized Antenna With Reconfigurable 2-Dimensional Axial Ratio Beamwidth

Kim

Han

et al. 2021

IEEE Access

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This paper proposes a wideband circularly polarized antenna with a reconfigurable 2dimensional axial ratio. For mobile satellite communication, the low profile CP antenna with wide axial ratio scanning and a wide frequency bandwidth is essential. In this paper, we propose the wideband CP antenna with an axial ratio controller. The axial ratio deteriorates when the difference between transverse modes (TM)01 and TM10 gets larger. Therefore, in the proposed antenna, the axial ratio controller is used to compensate for the difference by controlling the amplitude and phase of the received signals. The proposed antenna has three mode states for the 2-dimensional axial ratio region. In a simulation of the wideband CP antenna, the axial ratio was below 3 dB in the 2-dimensional scanning region from -60 • to 60 • at every azimuth angle in the 20% factional frequency bandwidth. To verify the proposed antenna with the axial ratio controller, the wideband CP antenna is implemented at 5.8 GHz. A low noise amplifier (LNA) and digital phase shifters are employed for the axial ratio controller. The measured axial ratio was below 3 dB in the 2-dimensional scanning region from -60 • to 60 • at every azimuth angle in the 20% factional frequency bandwidth.INDEX TERMS Wide-angle axial ratio beamwidth, Wide band axial ratio, Amplitude and phase control, 2-dimensional reconfigurable axial ratio

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Section: Implementation and Measurementmentioning

confidence: 99%

Section: Implementation and Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Wideband Circularly Polarized Antenna With Reconfigurable 2-Dimensional Axial Ratio Beamwidth

Kim

Han

et al. 2021

IEEE Access

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A Circularly Polarized Stacked Patch Antenna for Dual Band L1 & L2 GPS Applications

Reddy

Sheela

2023

Wireless Pers Commun

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Hexagonal-Triangular Combinatorial Structure Based Dual-Band Circularly Polarized Patch Antenna for GAGAN Receivers

Sahana

Jayakumar

2023

IEEE Access

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A multilayer gap-coupled dual band hexagonal microstrip patch antenna is presented for GPS Aided GEO Augmented Navigation (GAGAN) receivers. GAGAN is developed by AAI (Airport Authority of India) and ISRO (Indian Space Research Organization) exclusively for aviation purposes with the GPS frequencies L5 (1176.45 MHz) and L1 (1575.42 MHz). The proposed GAGAN antenna has three trapezoidal and four equilateral triangular patch resonators configured to form a gap-coupled hexagonal patch on the top layer and seven equilateral triangular patches with slots in between to form the middle layer. Both the layers are fed by a single coax feed to achieve a dual band compact microstrip antenna of size 55 mm x 55 mm x 3.2 mm. Instead of designing the hexagonal antenna conventionally from a circular patch antenna, the sides of the equilateral triangular patch are truncated to obtain the proposed compact hexagonal antenna as the triangular antenna occupies less area when compared to circular or square patches for a fixed frequency. To bring in novelty with improved performance, the combinatorial structured configuration has been explored through step-by-step optimization. The aspects of GAGAN requirements like circular polarization with a single input, dual band operation and high gain with gain flatness are achieved with this compact structured antenna when compared to square and circular patch antennas. The combinatorial structures such as perturbation and truncation introduced in the patches are responsible for exciting two near-degenerate orthogonal modes producing circular polarization (CP). A cross slot etched in the center patch results in gain enhancement with a gain above 3.2 dBi over a bandwidth of 20 MHz in both the bands. Five shorting pins are added to achieve high impedance matching and good CP with an axial ratio (AR) below 2 dB. The simulated and measured results are found to be in good agreement with greater than 20 MHz operational bandwidth exhibiting CP with an omni-directional radiation pattern having high cross polar levels of -22 dB. The size reduction achieved in the proposed design is 56.79% when compared to the conventional hexagonal patch antenna. The measured 10 dB impedance bandwidth is 2.7% and 2.1% for L5 and L1 bands respectively with a 3 dB AR bandwidth of 2.3% for L5 and 2.0% for L1, satisfying GAGAN requirements.INDEX TERMS Circular polarization, dual band, global positioning system (GPS), GPS aided GEO augmented navigation receivers (GAGAN), hexagonal antenna, multilayer, triangular antenna.

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Compact Dual-Band Circularly Polarized Patch Antenna With Wide 3-Db Axial Ratio Beamwidth for Beidou Applications

Cited by 8 publications

References 23 publications

Wideband Circularly Polarized Antenna With Reconfigurable 2-Dimensional Axial Ratio Beamwidth

Wideband Circularly Polarized Antenna With Reconfigurable 2-Dimensional Axial Ratio Beamwidth

A Circularly Polarized Stacked Patch Antenna for Dual Band L1 & L2 GPS Applications

Hexagonal-Triangular Combinatorial Structure Based Dual-Band Circularly Polarized Patch Antenna for GAGAN Receivers

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