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. A Broadband Reflectarray Antenna using the Triangular Array ... A Broadband Reflectarray Antenna using the Triangular Array ... thick foam layer backed by the ground plane is ... on the reflectarray surface the length of slots were
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 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.
US3633207A - Modulated impedance feeding system for log…
Examples: * Dipole and loop. * Microstrip and slot ... J. Huang, “Microstrip reflectarray antenna for the SCANSCAT radar application”, ... Phasing approaches: variable size, element rotation, delay lines. orˆ ir. i. R. ... Substrate. Ground Plane ... Prediction of Slot Shape and Slot Size for Improving the Performance ... The predicted shape is being represented here by a dummy variable “S” where S .... An SMA connector with a 6.8 mm long pin (1 mm for ground plane, 5.1 mm for air-gap, .... Pirinoli P. Neural network characterization of reflectarray antennas. Slots in Ground Planes - Henry Ott The most important thing that I can say about slots in ground planes, is don't have them! If you do have slots, no traces can cross over them. If a trace does cross ... PEC core b=a = 0:975 An Offset-Fed X-Band Reflectarray Antenna ... Abstract—An X-band circularly polarized reflectarray antenna with an offset feed is ... technique for phase compensation, which allows the rotation of the slot in- stead of the element .... slot width s and the rotation angle 'are variables. ..... are fabricated separately, and assembled with a solid aluminum ground plane beneath.
Planar UWB antenna with multi-slotted ground plane -…
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 …
A Ku-band reflectarray using variable rings and slots on ...
US5229777A - Microstrap antenna - Google Patents
Reflectarray Element Based on Aperture-Coupled Patches With ... 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. 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.