The present invention discloses a reconfigurable wideband phase-switched screen (PSS) based on an artificial magnetic conductor (AMC). Gap capacitance between patches is controlled by changing the capacitance of varactors, so that periodic units have a plurality of continuous frequency points. A phase difference between two adjacent frequency bands is 143°-217°, so that the periodic structure absorbs incident electromagnetic waves in a wide frequency band, and the broadband PSS is implemented with a relative bandwidth of 45.2%. The AMC structure according to the present invention is simple in structure and easy to process, with a thickness less than one twentieth of the working wavelength, and greatly reduces size and costs.

A frequency tunable dielectric apparatus applied to building components is disclosed, which is used to increase the transmittance and the transmission bandwidth of signals. The dielectric apparatus includes a structural body, a frequency-tuning component, and a positioning component. The structural body is formed of a dielectric material with an equivalent dielectric constant value ranging from more than 1 to less than 200000. The structural body is coupled to the target component by the positioning component to form a composite structure. The minimum equivalent diameter of the dielectric structure corresponding to the composite structure on the projected area of the surface through which the RF signal passes on the surface of the target component is not less than one-eighth of the working wavelength. By changing the spacing, the dielectric apparatus may be used to tune the working frequency and enhance the transmittance and transmission bandwidth.

A method for optimizing user equipment wireless localization using K reconfigurable intelligent surfaces reflecting signal(s) transmitted between a base station and the user equipment, the method including, whatever an a priori position of the user equipment selecting at least one reconfigurable intelligent surface to activate among the K reconfigurable intelligent surfaces, determining phases of elements of the at least one reconfigurable intelligent surface, by minimizing a predetermined cost function, depending on the a priori position, and accounting for a predetermined position error bound of the user equipment, while ensuring that at most K reconfigurable intelligent surfaces are selected, ensuring that the minimum Euclidian distance between two consecutive selected reconfigurable intelligent surfaces of a predetermined configuration, is strictly higher than a predetermined value limiting interference between additional multipath components generated by the at least one reconfigurable intelligent surface.

An electromagnetic non-line-of-sight imaging method based on time reversal and compressed sensing is provided. The electromagnetic signal passively scattered by the target behind the obstacle is received by the antenna, the contour imaging of the target is realized by using compressed sensing, the signal-to-noise ratio of the electromagnetic signal of the target is improved by using time reversal for the contour area, so as to achieve the purpose of staring at and detecting the non-line-of-sight target; a random radiation signal is transmitted for multiple times through active metasurface modulation, compressed sensing is performed for calculation imaging after receiving the signal to judge the number of targets and the contour area in the occluded area; for the target contour area, the amplitude and phase of signals obtained at different positions are adjusted by the active metasurface, so as to focus and scan the electromagnetic signals at different positions behind the obstacle. The method can detect the target in the unsealed scene behind the wall and the metal structure (3) which cannot be penetrated by electromagnetic signals, and expand the detection capability of the traditional detection and imaging radar.

A communication device includes a display device, a phase tuning layer, and a mmWave (Millimeter Wave) module. The display device includes a first display portion and a second display portion. The pixel density of the first display portion is greater than that of the second display portion. The phase tuning layer is adjacent to the second display portion. The mmWave module generates a wireless signal. The wireless signal is propagated through the second display portion and the phase tuning layer.

An FSS unit element includes: multiple conductors extending outward from the central portion of the FSS unit element; and at least one circuit element connected to the multiple conductors at the central portion of the FSS unit element, and disposed with fewer than the number of the multiple conductors.

Disclosed is an electromagnetic-circuit co-design approach for massively reconfigurable, multifunctional, and high-speed programmable metasurfaces with integrated chip tiling. The ability to manipulate the incident electromagnetic fields in a dynamically programmable manner and at high speeds using integrated chip tiling approach is also disclosed. The scalable architecture uses electromagnetic-circuit co-design of metasurfaces where each individual subwavelength meta-element is uniquely addressable and programmable. The disclosed device comprises a large array of such meta-elements. The design relies on integrated high frequency switches designed in conjugation with meta-element for massive reconfigurability of incident amplitude and phase. The disclosed chip is multi-functional and can perform beamforming, high speed spatial light modulation, dynamic holographic projections, and wavefront manipulation.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as long term evolution (LTE). According to various embodiments, an antenna apparatus may include: an array antenna including a sub-array, a power divider, and a reconfigurable phase shifter circuit, the reconfigurable phase shifter circuit may be configured to provide a first phase shift value based on a switch in a first state, and provide a second phase shift value different from the first phase shift value based on the switch in a second state.

A cloaking and/or deception system comprises: a structure having a plurality of resonators characterized by a controllable resonance frequency, wherein the resonators are arranged to collectively ensure that variation of the resonance frequency over a predetermined range of resonance frequencies generates a phase shift between the an electromagnetic wave incident on the structure and an electromagnetic wave scattered off the structure; and a controller configured for controlling the resonance frequency to provide a time-varying resonance frequency characterized by a temporal function which comprises a linear time-dependence.

Embodiments of this application relate to a method for controlling an antenna polarization direction and an antenna system. A first feed array and a second feed array whose polarization directions are orthogonal are disposed in the antenna system. A polarization direction of a beam of a third planar array may be adjusted by adjusting parameters such as beam widths/a beam width of the first feed array and/or the second feed array, phase centers/a phase center of the first feed array and/or the second feed array, and a phase difference between the first feed array and the second feed array.