Design and Implementation of Reconfigurable Reflectarray ... Various reflectarray element designs were considered which included variable size patches, patch with variable length slot, patch with fixed slot fed by variable length stripline. After careful study and systematic evaluation, it was decided that the element – patch with variable length slot in the ground plane was best suited US6774851B1 - Antenna with variable phase shift - Google ... The present invention relates to a reflectarray antenna. The reflectarray antenna comprises a dielectric substrate layer disposed on a ground plane. An array of radiating elements such as microstrip patches of similar size are arranged into a regular lattice configuration on the top surface of the substrate layer. A periodic configuration of slots of variable size are provided at the bottom ... Reflectarray Antennas: Analysis and Synthesis Techniques ... 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 A Ku-band reflectarray using variable rings and slots on ...
Reflectarray with variable slots on ground plane
(PDF) Phase range improvement of unit cell of reflectarray There are a few kinds of phase compensation methods available for the fixed-beam reflectarray such as using open-circuited stubs [5], variable patch size [6], slot-loaded ground plane [7], slot-loaded patch [8] and the usage of electronic components [9]. A Broadband Reflectarray Using Patch With Slot Ring On A Broadband Reflectarray Using Patch With Slot Ring On Ground Plane Elements Fei Xue1, 2, Hongjian Wang1, Min Yi1, and Xingchao Dong1, 2 1CAS Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing, 100190, China 2University of Chinese Academy of Sciences, Beijing, 100049, China ABSTRACT—A broadband center-fed reflectarray …
Slots in Ground Planes - Henry Ott Consultants
A Broadband Reflectarray Using Patch With Slot Ring On A Broadband Reflectarray Using Patch With Slot Ring On Ground Plane Elements Fei Xue1, 2, Hongjian Wang1, Min Yi1, and Xingchao Dong1, 2 1CAS Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing, 100190, China 2University of Chinese Academy of Sciences, Beijing, 100049, China ABSTRACT—A broadband center-fed reflectarray … PIER B Online - Design and Analysis of Microstrip PIER B : Progress In Electromagnetics Research B "Analysis and design of a microstrip reflectarray using patches of variable size," IEEE Symposium on Antennas and ... M. R., J. Shaker, M. Cuhaci, and A. Sebak, "Reflectarray with variable slots on ground plane," IEEE Proc. Microwave, Antennas and Propagat., Vol. 150, No. 6, 436-439 ... Reflectarray Antennas: Analysis and Synthesis Techniques 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 Electromechanical beamsteering reflectarray antenna for X
US6281847B1 - Electronically steerable and direction finding…
Mar 12, 2007 · Abstract: A phase-shifter element for printed reflectarrays with more than 4 cycles of phase delay is presented in this work. 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 patches coupled through a slot to variable length lines.
A unit cell composed of a microstrip ring and a slot on the ground plane is presented. The phase response range of the unit cell at 18 GHz is over 440° with a smooth phase variation. A Ku band reflectarray is designed and measured at 18 GHz to verify its performance. The maximum gain and half-power beam width is 31.7 dB and 4.7°, respectively.
Bi-Function Multi-Beam Graphene Lens Antenna for Terahertz ... Different methods to control the phase of the re-radiated wave have been introduced such as using elements with variable sizes, slots with variable lengths on the ground plane, and microstrip reflectarray with elements having variable rotation angles [10] . A broadband Ku-Band microstrip In [6], a novel bandwidth ... reflectarray unit cells in [13]. Variable-length slots on the ground plane have been used to adjusting the phase. It has been shown that fractal configurations can reduce the size of the reflectarray unit cell and increase the maximum phase swing. A novel fractal microstrip element on a single layer substrate Design of Liquid Crystal Based Tunable Reflectarray Antenna ... thickness of 0.787mm backed by a ground plane. The dimensions of resonant patch element are kept 8.4mm x 11.8mm (LxW) for resonance within X-band frequency range. It can be observed from Fig. 1 (b) that the E-fields are sinusoidaly distributed with maximas at the corners of the resonant patch element. Therefore the surface currents will be Phase Characterization of Reconfigurable Reflectarray Antennas
A DRA reflectarray with variable slot loading length supported on dielectric substrate with conducting ground plane is constructed as shown in Figure 1. The unit cell consists of rectangular DRA, with length L, width W, height H, a slot in the ground plane, with length L s and width W s, a dielectric layer of thickness h, and a conducting ... (PDF) Phase range improvement of unit cell of reflectarray ... There are a few kinds of phase compensation methods available for the fixed-beam reflectarray such as using open-circuited stubs [5], variable patch size [6], slot-loaded ground plane [7], slot-loaded patch [8] and the usage of electronic components [9]. Reflectarray antennas: A review - e-fermat.org or surfacewave generation , because of the ground plane. Reflectarray antennas: A review Eduardo Carrasco (1) and Jose A. Encinar (2) ... attached to four variable length phase delay lines was presented in [11], in the frequency range from 9.6 GHz to 11.2 GHz. Fig. 3. Basic model of a 1-bit phase-shifter consisted of a microstrip