An X-Band Circularly Polarized Reflectarray Using Split… The proposed reflectarray prototype is fabricated using the same substrate assumed in the element design. The array plane is divided into four quarters for5(a). They are then assembled and fixed on a solid aluminum ground plane. Wooden frames are incorporated to support both the array plane and... Broadband Reflectarray with Convex Strip Elements Microstrip reflectarrays are very attractive aperture antennas because of their planar structure and a simple feed system [1]. However, the bandwidth isA. Reflectarray Antenna. Figure 1 shows basic geometry of microstrip reflectarrays consisting of a planar strip array of dipoles with variable length... Reconfigurable Reflectarray Antenna... A reflectarray prototype has been measured in a far-field anechoic chamber facility at NUST, giving a gain of 14dB and axial ratio>20dB at the operating frequency of 10GHz.The unit cell consists of a microstrip patch on the top layer and variable length slot in the ground plane.
An X-Band Circularly Polarized Reflectarray Using Split…
Reflectarray Antennas - PDF Free Download Reflectarray using printed patch elements with variable-length delay lines. 4. Introduction to reflectarray antenna.coupling slot in ground plane. patch radiation. thin membranes. air or honeycomb substrate. ground plane time delay. Report "Dielectric Resonator Reflectarray with Two DRA… DRA ground plane with variable slot length dielectric substrate conducting reflector. (a). (b). Fig.1 Unit cell DRA reflectarray with two DRA sizes andThe dielectric layer thickness is 2 mm with εr = 1. Variable slot length ls is used. The reflectarray size was 276 x 276 mm2 with elements spacing of...
A Reflectarray with Octagonal Unit Cells for 5-G Applications
In [15], slots with varying lengths on the ground plane were used to design reflectarray antennas. In [16], slot antennas with microstrip delay lines were used in the design of reflectarray ... A Ku-band reflectarray using variable rings and slots on the ... 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. Reflectarray Element Based on Aperture-Coupled Patches With ... 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. US6774851B1 - Antenna with variable phase shift - Google Patents
US4287518A - Cavity-backed, micro-strip dipole antenna array…
Request PDF on ResearchGate | Reflectarray with variable slots on ground plane | A reflectarray structure based on a planar aperture coupled antenna configuration is presented. The required phase ... Reflectarray with slots of varying length on ground plane ... In [15], slots with varying lengths on the ground plane were used to design reflectarray antennas. In [16], slot antennas with microstrip delay lines were used in the design of reflectarray ... Reflectarray element using variable ring with slot on ... A novel structure using a variable microstrip ring with a slot ring on part of the ground plane is proposed as an auxiliary unit cell in a reflectarray. A progressive phase range larger than 682° has been achieved by changing the sizes of the microstrip rings and adding slot rings on part of the ground plane. A K-band reflectarray has been fabricated and shows very good performance. Reflectarray element using variable ring with slot on ... A novel structure using a variable microstrip ring with a slot ring on part of the ground plane is proposed as an auxiliary unit cell in a reflectarray. A progressive phase range larger than 682deg has been achieved by changing the sizes of the microstrip rings and adding slot rings on part of the ground plane. A K-band reflectarray has been fabricated and shows very good performance.
A simple circular ring loaded with an open-circuited stub with variable length was also stud-ied and it was found that it wasperforated ground plane and rectangular concave.The effect of the radii R1 of under-loading slots on the TEz111 mode of the DRA reflectarray unit element is studied by further...
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]. There are several designs for reflectarray and transmitarray using dipoles, microstrip patches, and dielectric resonator antennas which have 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 antenna is ... 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 ... Electromechanical beamsteering reflectarray antenna for X ...
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 ... Varying Slot Lengths Strip Loading Squared Dielectric ... Ka-band variable DRA reflectarray lengths supported on substrate of same dielectric constant of DRA was de-signed[14]. A X-band rectangular DRA and circular polari-zation at X-band[15] are investigated. Dual DRA sizes supported on ground plane with variable slot lengths is il-lustrated in[16] for getting full phase cycle using superposi-tion.