Circular Polarization and Mode Reconfigurable Wideband Orbital Angular Momentum Patch Array Antenna

Liu, Qiang; Chen, Zhi Ning; Liu, Yuanan; Li, Fuhai; Chen, Yu; Mo, Zhihong

doi:10.1109/tap.2018.2803757

Cited by 81 publications

(35 citation statements)

References 27 publications

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“…In the microwave frequency range, for the generation of LG modes, a variety of methods have been proposed. The most common is an antenna array (typically short dipoles or patches) arranged around a circumference and producing a signal with an incremental phase shift sequentially over the array elements [4,13]. Generation of OAM mode l = 3 has been demonstrated at 18 GHz using a Cassegrain antenna fed by a 4 × 4 waveguide Butler matrix [14].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Laguerre–Gaussian mode purity produced by three-dimensional-printed microwave spiral phase plates

Isakov

Allen

et al. 2020

R. Soc. open sci.

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Computer-aided design software and additive manufacturing provide flexibility for the direct fabrication of multi-material devices. This design and fabrication versatility has been investigated for the manufacture of dielectric spiral phase plates (SPP) that generate electromagnetic waves with helical wavefronts. Three types of SPPs designed to produce an orbital angular momentum (OAM) mode number l = |1| were additively manufactured using material extrusion and polyjet fabrication methods. The OAM mode characteristics of the transformed helical microwaves as a function of the SPP geometrical features were investigated experimentally in the 12–18 GHz frequency range. The SPPs were further combined with an additively manufactured dielectric lens that provided a marked improvement in OAM mode purity. Finally, multiplexing and de-multiplexing of two OAM modes were demonstrated successfully using an optimum SPP geometry and arrangement.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Laguerre–Gaussian mode purity produced by three-dimensional-printed microwave spiral phase plates

Isakov

Allen

et al. 2020

R. Soc. open sci.

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“…These microstrip antennas are limited to a narrow impedance bandwidth of about 2% and a low OAM purity of about 72% 16 . In addition, the array antennas 17–21 are proposed to generate OAM beams by controlling a phase shift of the successive element. But the number of the array elements limits the order of the OAM mode and more elements are needed to ensure that the main lobe is in the pure mode region 17 .…”

Section: Introductionmentioning

confidence: 99%

Generation of Broadband High-Purity Dual-Mode OAM Beams Using A Four-Feed Patch Antenna: Theory and Implementation

Huang

et al. 2019

Sci Rep

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A broadband four-feed circular patch antenna is demonstrated to generate high-purity dual-mode vortex beams carrying orbital angular momentum (OAM) for the first time. The electric field formula of the circularly polarized (CP) component is derived for analyzing radiation characteristics of different OAM modes, such as the CP property, phase and amplitude distributions. Theoretical calculation and numerical simulation results show that the four-feed patch antenna operating in the TMn1 mode can generate ±n OAM waves. A prototype of a four-feed circular TM21-mode patch antenna is fabricated and measured to verify the effectiveness of the theoretical analysis. The proposed antenna consists of a four-feed patch with an air-coupled parasitic patch and a four-way phase-shifting feeding network. Experimental results show that the proposed antenna can generate a left-hand CP OAM with mode l = +2 and a right-hand CP OAM with mode l = −2. The OAM beams are generated in a wide band from 5.50 to 6.50 GHz with a mode purity over 90%. The proposed method is very suitable for the generation of wideband, dual-mode and high-purity OAM beams in the microwave and millimeter wave bands.

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“…To achieve these needs, the first solution is to design antennas with reconfigurable polarization and wideband characteristics [1,2,3,4,5,6,7,8]. Array antennas adopted a Wilkinson power divider [1] and a power divider with a phase shifter [2] to obtain a wide axial-ratio bandwidth (ARBW). These antennas, however, require complex feeding networks.…”

Section: Introductionmentioning

confidence: 99%

“…These have a tapered configuration or a wide open-end configuration, which excites multimode resonances to achieve the wideband CP. Instead of using a PIN-diode as an electrical switching technique [1,2,3,4,5], other interesting techniques were proposed in [6,7]. The water spiral structure was used for the wideband CP performance in [6].…”

Section: Introductionmentioning

confidence: 99%

Simple Reconfigurable Circularly Polarized Antenna at Three Bands

Park

Yun

2019

Sensors

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In this paper, a simple design for a triple-band circularly polarized (CP) antenna with the capability of switching its polarization between dual-sense CPs is presented. The proposed antenna is comprised of a monopole loop antenna as a primary radiator. By placing a parasitic loop around the primary radiator, an additional CP band is achieved. Reconfigurability of the polarization between right-hand CP (RHCP) and left-hand CP (LHCP) at three different frequencies of 2.5, 3.3, and 3.8 GHz was realized by controlling the ON/OFF states of two PIN diodes. For validation, the fabricated antenna yielded an impedance bandwidth of 52.6% (2.34–4.01 GHz), while the axial ratio bandwidths for both the RHCP and LHCP states were 3.5% (2.47–2.56 GHz), 6.6% (3.20–3.42 GHz), and 2.4% (3.74–3.83 GHz). The measured broadside gains within the axial ratio bandwidth were 1.2, 2.7, and 1.4 dBi, respectively. Compared to other reconfigurable multi-band CP antennas, the proposed design is the first work to achieve a reconfigurable polarization at three distinct bands at a low fabrication cost by using only two diodes. The proposed antenna is suitable for WLAN and WiMAX applications.

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Circular Polarization and Mode Reconfigurable Wideband Orbital Angular Momentum Patch Array Antenna

Cited by 81 publications

References 27 publications

Evaluation of the Laguerre–Gaussian mode purity produced by three-dimensional-printed microwave spiral phase plates

Evaluation of the Laguerre–Gaussian mode purity produced by three-dimensional-printed microwave spiral phase plates

Generation of Broadband High-Purity Dual-Mode OAM Beams Using A Four-Feed Patch Antenna: Theory and Implementation

Simple Reconfigurable Circularly Polarized Antenna at Three Bands

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