The antenna preferably includes a high impedance surface with a plurality of antenna elements disposed on said surface, a plurality of associated demodulators and power sensors and a switch. US4259670A - Broadband microstrip antenna with automatically… Variable impedance devices (e.g., series resonant circuits and/or transmission line tuning stubs) are connected to predetermined locations on a microstrip radiator patch for changing the effective resonant dimensions of the antenna as a … US5905465A - Antenna system - Google Patents For example, a screw can be placed through clearance holes in the upper ground plane 46, the upper and lower flanges 62a, 62b of the mode suppressor 58, and the lower ground plane 48 and secured with a fastener on the lower side.
Microstrip Reflectarrays Myths and Realities JINA Conference…
Reflectarray with variable slots on ground plane Dual Sized Varying Slot Lengths Loading Dielectric Resonator Reflectarray. Reflectarray with variable slots on ground plane, The radiation patterns of the designed reflectarray at 10 GHz are shown in Figure 4. That technique broaden the bandwidth by superposition the two bandwidths. Varying Slot Lengths Strip Loading Squared Dielectric Dual DRA sizes supported on ground plane with variable slot lengths is il-lustrated in[16] for getting full phase cycle using superposi-tion.A reflectarray antenna consists of elements of rectangular dielectric resonator (DRA) with slot loading of different lengths is proposed for bandwidth...
A polarization converting surface for reflecting impinging radio frequency waves. The surface includes a ground plane and a plurality of elements disposed in an array a distance from the ground plane.
Comparison of Resonant Elements of Microstrip Reflectarray ... length phase delay lines, (b) Variable - size dipoles or loops, (c) Variable - size patches, (d) Variable angular rotations. The building block of the reflectarray antenna is unit cell. Unit cell may contains single layer or multiple layer patches. As shown in Figure , there are several methods for 1 reflectarray elements to a planar phase ... Eduardo Carrasco - Assistant Professor - Universidad ... The proposed reflectarray element allows very linear phase curves and is based on the combination of two previously studied and demonstrated concepts: variable length slots on a ground plane and ... Reflectarray Element Based on Aperture-Coupled Patches With ...
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.
Equivalent circuit of a reconfigurable triple-slot reflectarray cell Apr 27, 2016 ... distance to the ground plane change. Only a ... circuit plane is really present [14]. .... Validation with variable internal slot and fixed external slots. Bandwidth Performances of Reconfigurable Reflectarrays: State of Art ... Reflectarrays, reconfigurable antennas, bandwidth. 1. Introduction. Nowadays ..... A microstrip patch loaded by a slot in the ground plane, opportunely integrated ...
US3633207A - Modulated impedance feeding system for log…
Compact rectangular microstrip antenna with group of …
Radiation Analysis and Characteristics of Conformal Reflectarray Antennas: Analysis of Design Optimization of Bandwidth and Loss Performance of Reflectarray Antennas Based on Material Properties: Neural Network Characterization of Reflectarray Antennas: Recent Developments of Reflectarray Antennas in Dual-Reflector Configurations