Time-Modulated Antenna Array With Dual-Circular Polarization

Bogdan, Grzegorz; Bajurko, Paweł; Yashchyshyn, Yevhen

doi:10.1109/lawp.2020.2999643

Cited by 8 publications

(7 citation statements)

References 16 publications

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“…where H and V polarizations are the CMS of each other. The objective function defined in (16) assures that the switching sequence provides equal array gain at the fundamental frequency for both polarizations. Note that the beam at the fundamental frequency is not steerable, thus (16 ) optimizes the beam at the broadside direction.…”

Section: Designing the Switching Sequencementioning

confidence: 99%

“…The objective function defined in (16) assures that the switching sequence provides equal array gain at the fundamental frequency for both polarizations. Note that the beam at the fundamental frequency is not steerable, thus (16 ) optimizes the beam at the broadside direction. In addition to (16), in (17) another objective function is defined at the 1 st sideband to obtain the maximum array gain for an arbitrary angle (θ 1 ).…”

Section: Designing the Switching Sequencementioning

confidence: 99%

“…Note that the beam at the fundamental frequency is not steerable, thus (16 ) optimizes the beam at the broadside direction. In addition to (16), in (17) another objective function is defined at the 1 st sideband to obtain the maximum array gain for an arbitrary angle (θ 1 ). Note that θ 1 can be any angle within the scan range of the array.…”

Section: Designing the Switching Sequencementioning

confidence: 99%

“…Therefore, for the first scenario we aim to optimize the array gain at the 1 st sideband, thus we choose L 1 = 4 dBi. Replacing the objective functions defined in (16) and ( 17) into (15) and utilizing the GA optimization for θ 1 = 30 o with 200 generations and population size of 100 gives the optimized switching sequence shown in Fig. 2(a).…”

Section: Designing the Switching Sequencementioning

confidence: 99%

“…Generally, diversity is added to the system by sending the same data in different times, frequencies, polarizations or even different directions in space [15]. Recently, a TMA with dual circular polarization is proposed where it can provide orthogonal circular polarizations in different sidebands [16]. However, the proposed setup is not scalable, only 4 antenna elements, and it is only suitable for 0 o direction.…”

Section: Introductionmentioning

confidence: 99%

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A Time Modulated Array With Polarization Diversity Capability

et al. 2021

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The Time Modulated Array (TMA) provides multiple radiation beams at different frequencies, by turning the radiating elements on and off. In this paper, we propose to add polarization diversity to a wireless communication link by leveraging the capabilities of the TMA. The proposed architecture switches between two orthogonal polarizations, instead of turning the antenna off, providing polarization diversity for the receivers. We show that the beams of each polarization at the sidebands are exactly the same. However, the switching sequence should be optimized for the fundamental frequency to provide the same radiation level at each sideband. Two different switching sequences are proposed, which are optimized for different conditions. To evaluate the switching sequences and the diversity order of the system, an 8-element array with dual polarization antennas is fabricated. The radiating antenna element is a dual feed ring slot antenna, designed for 5.8 GHz with 10% fractional bandwidth. Both the single antenna and the array are measured in an anechoic chamber. The measurements indicate that the prototype provides full diversity gain along with multiple beam generation and beam steering, while it is very low cost and has low complexity.

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Section: Designing the Switching Sequencementioning

confidence: 99%