Reflectarray with variable slots on ground plane

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US6774851B1 - Antenna with variable phase shift - Google ...

Broadrange Reflectarray Element with Combined Slot and ... Broadrange Reflectarray Element with Combined Slot and Dielectric Resonator Resonances Shin-Rou LEE 1, Eng-Hock ... 986 S. R. LEE, E. H. LIM, F. L. LO, ET AL., BROADRANGE REFLECTARRAY ELEMENT WITH COMBINED SLOT AND … Wave Port Slotted Ground Electric Field PEC Wall PEC Wall x z ... perforated ground plane and rectangular concave dip 12 GHz ... Triple-slot phase-shifting cell loaded with one variable ... Triple-Slot Phase-Shifting Cell Loaded with One Variable Capacitance for Reflectarray Applications T. Makdissy, R. Gillard, E. Fourn, E. Girard and H. Legay assess the potential of the cell to achieve the des This letter presents a new linearly polarized phase-shifting cell for reflectarray applications. A novel broadband and high-gain microstrip reflectarray ... A novel broadband and high-gain microstrip reflectarray antenna with variable polarization. Authors; Authors and affiliations ... A Ka-band microstrip reflectarray with elements having variable rotation angles. ... Shaker J, Cuhaci M, et al. Reflectarray with variable slots on ground plane. In: IEE Proceedings of Microwave Antennas Propagation ...

A first disk having radiating elements formed thereon, a second disk having radiating elements formed thereon and overlying the first disk, an electromagnetic energy reflecting disk overlying the second disk and having a first plurality of …

reflectarray simulation - edaboard.com DRA reflectarray is quite challenge, even you got good simulation result, especially when you come to fabrication of the DRA reflectarray, in practical it is very difficult to position all the DRA blocks accurately like what you designed in simulation and the fabricated DRA reflectarray always end up with DRAs position get shifted by 0.5mm-1mm ... layout - Single ground plane vs split planes? - Electrical ... My question is, where do you draw the line between using a single plane in vs designing the ground planes? I don't; I keep the planes as continuous as possible and almost never use slots - they are bad for a few reasons which I will describe.

US6774851B1 - Antenna with variable phase shift - Google ...

Reconfigurable reflectarrays and array lenses for dynamic antenna beamThe solutions in Table I are classied according to whether the control is made using variable lumpedThe microstrip lines and the ground plane with. the slot were printed on both sides of a 0.5-mm thick... A wideband, single layer reflectarray antenna with... |… The proposed unit cell of the reflectarray antenna comprises a patch loaded with two distinct slots, viz. a square ring and a cross loop, printed on a low loss substrate, which is backed by a foam-loaded ground plane. The unit cell element offers a linear and large dynamic reflection phase range, which is... X Band two layer printed reflectarray with shaped reflectarrays can be able to generate many combinations of different scan angles and different beam shapes as in phased arrays. On the other hand, the main disadvantage of reflectarrays is their narrow bandwidth. There are two factors that limit the frequency bandwidth. In reflectarrays, resonant type...

Progress in Reflectarray Antenna Research: From ... - Eucap 2013

Fig. 2 shows the jagged slot plane of the unit cell in details. Corresponding to each coupling slot on PCB1, one set of jags with specified slopes is made in lateral edges of the jagged slot plane on the top layer of PCB2 in such a way that the jags meet coupling slots from their outer side. Reflectarray Antennas: Analysis and Synthesis Techniques International Journal of Antennas and Propagation is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles on the design, analysis, and applications of antennas, along with theoretical and practical studies relating the propagation of electromagnetic waves at all relevant frequencies, through space, air, and other media. A novel broadband and high-gain microstrip reflectarray ... This article proposes a new kind of microstrip reflectarray ... microstrip reflectarray antenna with variable polarization ... with variable slots on ground plane. ... Slotted Tunable Reflectarray Antenna in the scattering from patch and reflection from ground plane can be avoided. This effect therefore provides the opportunity to limit the mutual coupling effects. Another significant advantage is the reduction of phase errors. In the design of reflectarray with variable size patches, the phase errors occur due to the fact that the for