A reconfigurable reflectarray antenna in Ka-band using optically excited silicon

Alizadeh, Peter; Andy, Andre Sarker; Parini, C.G.; Rajab, Khalid Z.

doi:10.1109/eucap.2016.7481611

Cited by 5 publications

(4 citation statements)

References 7 publications

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“…This type of reconfiguration technique is based on the use of photoconductive switches, made of a semiconductor material (silicon or gallium arsenide) [44,45]. In optical reconfiguration, the photoconductive switches obviate the need for metallic wires, and bias lines are used which provide less interference and high isolation compared to electrical switches [46][47][48]. In addition, they exhibit extremely fast switching speeds, switching in nanoseconds.…”

Section: Optical Reconfigurationmentioning

confidence: 99%

Reconfigurable Antennas: Switching Techniques—A Survey

et al. 2020

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Due to the fast development of wireless communication technology, reconfigurable antennas with multimode and cognitive radio operation in modern wireless applications with a high-data rate have drawn very close attention from researchers. Reconfigurable antennas can provide various functions in operating frequency, beam pattern, polarization, etc. The dynamic tuning can be achieved by manipulating a certain switching mechanism through controlling electronic, mechanical, physical or optical switches. Among them, electronic switches are the most popular in constituting reconfigurable antennas due to their efficiency, reliability and ease of integrating with microwave circuitry. In this paper, we review different implementation techniques for reconfigurable antennas. Different types of effective implementation techniques have been investigated to be used in various wireless communication systems such as satellite, multiple-input multiple-output (MIMO), mobile terminals and cognitive radio communications. Characteristics and fundamental properties of the reconfigurable antennas are investigated. writing-review and editing, N.O.P. and R.A.A.-A.; investigation, N.O.P., H.J.B., Y.I.A.A.-Y. and A.M.A.; resources, N.O.P. and R.A.A.-A.; for other cases, all authors have participated. All authors have read and agreed to the published version of the manuscript.

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Section: Optical Reconfigurationmentioning

confidence: 99%

Reconfigurable Antennas: Switching Techniques—A Survey

et al. 2020

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“…Optical reconfiguration utilizes photo-conductive switches, formed by laser light incident on some semiconductor material [27]. Embedding this type of switches eliminates the need for metallic connections and biasing while providing fast switching speed [27], however, high optical power level is consumed through the laser light activation, especially in highly resistive Si [28]. Physically / Mechanically reconfigurable antennas is implemented by manually altering the structure of an antenna to enable reconfigurability [30], [31].…”

Section: Introductionmentioning

confidence: 99%

“…(28.57%, 19%, 22% and 14.81%, respectively) in Table 4 in terms of AR/S 11 B.W. as well as when comparing [79], [80], [94] (19.2%, 20.8%, 23.5%, respectively) to…”

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confidence: 99%

Electrical Reconfigurability in Modern 4G, 4G/5G and 5G Antennas: A Critical Review of Polarization and Frequency Reconfigurable Designs

2023

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This paper presents a critical review of modern 4G, 4G/5G, and 5G antennas, which employ PIN diodes and Varactors for polarization or frequency reconfiguration. For the reviewed 4G and 5G polarization reconfigurable antennas, a new parameter named spectrum utilization "AR/S 11 B.W." is defined for the first time to predict the shared spectrum between the impedance bandwidth and the axial ratio bandwidth for circularly polarized antennas. The calculated spectrum utilization for many designs revealed that the majority of implementations failed to achieve full utilization of the available bandwidth. Besides, employing multiple PIN diodes is shown useful in improving the spectrum utilization and in supporting multiple polarization states. For the reviewed 4G, 4G/5G and 5G frequency reconfigurable antennas, the focus is mainly on comparing the available tuning range, fractional bandwidth and the Fractional Bandwidth Change (FBWC) upon tuning. The latter parameter, is defined and calculated in this work to measure the change in the FBW upon tuning. Utilizing multiple Varactors is shown promising in improving a 4G antenna's fractional bandwidth, while combining Multiple PINs and Varactors in one design is found efficient in improving the FBWC and the tuning range in the 5G spectrum.

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“…Despite the potential advantage of continuous reconfiguration without the need for unpredictable bias lines, optical reconfiguration has an inherent disadvantage in that it requires high power illumination sources [6]. Nevertheless, it has been shown that a high power infrared light emitting diode (IR-LED), as opposed to a bulky laser source can provide sufficient optical illumination power [7,8]. The use of an IR-LED light source removes the need for a large and expensive optical source, giving this method of reconfiguration the potential for large-scale applications, as developed in this Letter.…”

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confidence: 99%

Optically reconfigurable unit cell for Ka‐band reflectarray antennas

2017

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A new method for achieving amplitude reconfiguration in a reflectarray antenna is presented in this letter. The individual unit-cell is a compact multilayer structure, including a silver inkjet printed layer for rapid prototyping of the reflectarray. A small infrared light emitting diode (IR-LED) illuminating a silicon wafer provides the reconfiguration in the system. Various illumination intensities of the IR-LED allow for differing magnitudes of reflection from the unit-cell. This provides the potential for radiation pattern tapering or amplitude modifications of the gain of the reflectarray. Simulation and measurement results for a single unit-cell are presented here, with the matching between measurement and simulation also allowing for the change in the values of conductivity of the silicon to be extracted.

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A reconfigurable reflectarray antenna in Ka-band using optically excited silicon

Cited by 5 publications

References 7 publications

Reconfigurable Antennas: Switching Techniques—A Survey

Reconfigurable Antennas: Switching Techniques—A Survey

Electrical Reconfigurability in Modern 4G, 4G/5G and 5G Antennas: A Critical Review of Polarization and Frequency Reconfigurable Designs

Optically reconfigurable unit cell for Ka‐band reflectarray antennas

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