Time-Modulated Antenna Array for Real-Time Adaptation in Wideband Wireless Systems—Part I: Design and Characterization

Bogdan, Grzegorz; Godziszewski, Konrad; Yashchyshyn, Yevhen; Kim, Cheol Ho; Hyun, Seung

doi:10.1109/tap.2019.2902755

Cited by 30 publications

(13 citation statements)

References 41 publications

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“…6. Details on the design and specification can be found in [25]. The TMAA is composed of two layers: a superstrate with the permittivity of 2.2 (RT/duroid588) and a substrate with the permittivity of 3.66 (RO4003C).…”

Section: Time-modulated Antenna Arraymentioning

confidence: 99%

Experimental investigation of beam-steering applied to 2 × 2 MIMO system with single receiving RF chain and time-modulated antenna array

Bogdan

Godziszewski

Yashchyshyn

2020

Int. J. Microw. Wireless Technol.

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Multiple antennas and multiple radio frequency (RF) chains in both the transmitter and receiver are required in conventional radio systems employing the multiple-input multiple-output (MIMO) method. This paper presents an experimental investigation of a beam-steering time-modulated MIMO receiver with a single RF chain. Implementation of the receiver is based on a time-modulated antenna array (TMAA) and a software-defined radio. The sidebands generated inherently by the TMAA are utilized as virtual spatial channels with the beam-steering functionality. Performance of the system is investigated experimentally. The bit error rate and condition number of the channel matrix are examined for different radiation patterns in order to determine favorable configurations in a given multipath environment. Obtained results show a considerable impact of the beam-steering on the performance of MIMO transmission.

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Section: Time-modulated Antenna Arraymentioning

confidence: 99%

Experimental investigation of beam-steering applied to 2 × 2 MIMO system with single receiving RF chain and time-modulated antenna array

Bogdan

Godziszewski

Yashchyshyn

2020

Int. J. Microw. Wireless Technol.

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“…This feature is in contrast to TMA approaches performing a phase weighting of the antenna elements in, e.g. [19], [20], and allows us to formulate analog precoding design problems as convex problems.…”

Section: Time-variant Spdt Tma Analog Precodingmentioning

confidence: 99%

“…The rigid antenna weighting patterns in [17] prevent for adaptation to channel conditions. Conversely, a relatively flexible scanning is possible using TMAs provided in [18]- [22] operating in phased array mode, but approaches in [18], [19] require two antenna arrays working simultaneously. Recently, authors in [21], [22] investigated the use of stair-step pulses to further increase the available bandwidth for the data signal by a factor of 8.…”

Section: Introductionmentioning

confidence: 99%

Wideband Hybrid Precoding Using Time Modulated Arrays

González-Coma

Castedo

2020

IEEE Access

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Hybrid digital-analog precoding is a cost effective solution for transmitting over the large bandwidths and huge antenna arrays available in the millimeter wave frequency bands. In this work we focus on the transmission of wideband signals over hybrid precoders that utilize Time-Modulated Arrays in the analog domain. We consider analog precoders constructed with Single-Pole-Double-Throw switches which are both flexible and efficient. We pose two Orthogonal Frequency-Division Multiplexing symbol configurations to cope with the harmonic interference introduced by the Time-Modulated Array. One does not take advantage of the wireless channel frequency diversity and the other does. We optimize digital and analog precoders to maximize the achievable rate in both symbol configurations. Optimization takes into account the switching devices efficiency and the inherent losses of this antenna technique. Finally, we show the excellent performance obtained with the proposed approach, in terms of achievable rate, compared to that of conventional phased arrays.

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“…• An accurate and simple way to electronically steer the antenna beampattern by modifying the on-off switching instants [7], [8].…”

Section: Introductionmentioning

confidence: 99%

“…Alternative TMA approaches with single-pole multiplethrow (SPMT) switches have been subsequently considered [7], [9], [19]. However, these approaches provide a low-loss feeding network at the expense of a modest harmonic windowing [7], [19] or, conversely, they exhibit a suitable harmonic windowing at the cost of high-loss feeding networks [9].…”

Section: Introductionmentioning

confidence: 99%

Multibeam Single-Sideband Time-Modulated Arrays

et al. 2020

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The design of efficient time-modulated arrays (TMAs) for multi-beam steering purposes must be based on both a type of periodical sequences that guarantees an adequate windowing of exploited harmonics, and a feeding network capable of providing low hardware insertion losses. Compliance with these two requirements is not simple and is aggravated by the fact that, as the number of exploited harmonic beams increases, not only drastically decreases the antenna efficiency, but also the beam steering flexibility. In this work, we propose three different single sideband (SSB) feeding networks for multibeam TMAs constructed considering different combinations of single-pole multiple-throw (SPMT) basic modules. The proposed feeding networks simultaneously accomplish excellent levels of modulation efficiency, reasonable hardware insertion losses, and beam scanning flexibility. In addition, a comparison with standard phased arrays in terms of performance, phase sensitivity, complexity, and cost-effectiveness is carried out.INDEX TERMS Time-modulated arrays, beam steering, multibeam.

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Time-Modulated Antenna Array for Real-Time Adaptation in Wideband Wireless Systems—Part I: Design and Characterization

Cited by 30 publications

References 41 publications

Experimental investigation of beam-steering applied to 2 × 2 MIMO system with single receiving RF chain and time-modulated antenna array

Experimental investigation of beam-steering applied to 2 × 2 MIMO system with single receiving RF chain and time-modulated antenna array

Wideband Hybrid Precoding Using Time Modulated Arrays

Multibeam Single-Sideband Time-Modulated Arrays

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