A Double-OAM-Mode Helical Antenna

Dang, Weiguo; Yong-zhong, Zhu; Yu, Yang; Zuo, Kaiwei

doi:10.1109/icmmt.2018.8563261

Cited by 1 publication

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There was a significant change in the performance of the GRIN SPP when the lens was used (figure 6c). Together with an increase of the critical elevation angle θ c for mode l = +1, at higher frequencies (15)(16)(17)(18) the mode weight curve had a step-like shape (bold curve) with a high mode purity within the area defined by πρ2sinθ c , where θ c = 19°. With the lens, the GRIN SPP was now the best performing.…”

Section: Reducing Orbital Angular Momentum Beam Divergencementioning

confidence: 99%

“…Such an implementation allows the generation of multiple OAM-carrying beams at several harmonic frequencies simultaneously, as well as enhancing the field intensity of each mode [16]. A microstrip ring with a matched load (phase changes along a circle of 2πl) has been proposed to produce a circular travelling wave with a double OAM mode at 5 GHz [17]. Radiating element design is especially convenient for integration into radio frequency circuits.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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.

View full text Add to dashboard Cite

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.

show abstract

Section: Reducing Orbital Angular Momentum Beam Divergencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%