Journal ArticleDOI
Design of Resistor-Loaded Reflectarray Elements for Both Amplitude and Phase Control
TLDR
In this paper, two amplitude-controllable reflectarray elements with different phase tuning techniques are presented, where the reflection amplitude and phase can be controlled separately, and a full 360° phase range is achieved with a dynamic amplitude control over 10 dB.Abstract:
Conventional reflectarray elements have only phase-control property, and this letter presents novel reflectarray elements with both amplitude and phase control using proper resistor loading. Two amplitude-controllable reflectarray elements are presented with different phase tuning techniques. It is shown that the reflection amplitude for each element only depends on the resistor value, while the reflection phase only depends on the element size or the element rotation angle. Thus, the reflection amplitude and phase can be controlled separately, and a full 360° phase range is achieved with a dynamic amplitude control over 10 dB. Both elements are fabricated and measured using a customized waveguide. The measured results agree well with the simulations, which verify the effectiveness of the proposed designs.read more
Citations
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Journal ArticleDOI
Towards Smart and Reconfigurable Environment: Intelligent Reflecting Surface Aided Wireless Network
Qingqing Wu,Rui Zhang +1 more
TL;DR: In this paper, the authors provide an overview of the IRS technology, including its main applications in wireless communication, competitive advantages over existing technologies, hardware architecture as well as the corresponding new signal model.
Journal ArticleDOI
Intelligent Reflecting Surface-Aided Wireless Communications: A Tutorial
TL;DR: This paper provides a tutorial overview of IRS-aided wireless communications, and elaborate its reflection and channel models, hardware architecture and practical constraints, as well as various appealing applications in wireless networks.
Posted Content
Towards Smart and Reconfigurable Environment: Intelligent Reflecting Surface Aided Wireless Network
Qingqing Wu,Rui Zhang +1 more
TL;DR: This article addresses the key challenges in designing and implementing the new IRS-aided hybrid (with both active and passive components) wireless network, as compared to the traditional network comprising active components only.
Journal ArticleDOI
Intelligent Reflecting Surface Meets OFDM: Protocol Design and Rate Maximization
TL;DR: In this article, an IRS-enhanced orthogonal frequency division multiplexing (OFDM) system under frequency-selective channels is considered and a practical transmission protocol with channel estimation is proposed.
Journal ArticleDOI
Capacity Characterization for Intelligent Reflecting Surface Aided MIMO Communication
Shuowen Zhang,Rui Zhang +1 more
TL;DR: In this article, the fundamental capacity limit of RIS-aided point-to-point multiple-input multiple-output (MIMO) communication systems with multi-antenna transmitter and receiver in general, by jointly optimizing the IRS reflection coefficients and the MIMO transmit covariance matrix, is characterized.
References
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Journal ArticleDOI
Reconfigurable Reflectarrays and Array Lenses for Dynamic Antenna Beam Control: A Review
TL;DR: The paper describes the fundamental design approaches employed in realizing reconfigurable designs, and explores advanced capabilities of these nascent architectures, such as multi-band operation, polarization manipulation, frequency agility, and amplification.
Posted Content
Reconfigurable Reflectarrays and Array Lenses for Dynamic Antenna Beam Control: A Review
TL;DR: In this article, the authors present a review of the technologies and topologies of reconfigurable reflectarray and array lens designs, and surveys a range of experimental implementations and achievements that have been made in this area in recent years.
Journal ArticleDOI
Simulation of a phased-array antenna in waveguide
P. Hannan,M. Balfour +1 more
TL;DR: In this paper, a method for simulating a large planar phased-array antenna in order to determine the performance of its radiating elements has been developed, where simple measurements of a few elements inside of waveguides, their performance in the antenna array as a function of frequency, scan angle and polarization may be determined.
Journal ArticleDOI
A Thin and Broadband Absorber Using Double-Square Loops
Juan Yang,Zhongxiang Shen +1 more
TL;DR: In this paper, a two-dimensional (2D) periodic array of double-square loops printed on a dielectric substrate is used to absorb the incident electromagnetic wave, which can reduce a conducting plate's RCS greatly over a wide frequency range.
Journal ArticleDOI
Design, development, and testing of X-band amplifying reflectarrays
TL;DR: In this article, the design and development of two X-band amplifying reflectarrays is presented, which use dual-polarized aperture coupled patch antennas with FET transistors and phasing circuits to amplify a microwave signal and radiate it in a chosen direction.
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