Slots in Ground Planes - Henry Ott Consultants The lowest impedance signal return path is in a plane directly under the signal trace. Slots in ground planes divert the ground current flow (see figure), thereby producing a high ground impedance (Inductance) and a ground plane voltage drop that is the cause of increased emissions from the cables connected to the board. CiteSeerX — Reflectarray Antennas One major hurdle in the designing of reflectarrays is the compensation of phase difference between various elements. This paper presents reviews of various techniques for phase compensation, like using variable sizes of the patch, adding stubs of variable lengths and use of variable size slots on the ground plane. Perforated Dielectric Resonator Antenna Reflectarray - ACES ground plane instead of a planar ground plane has broadened the impedance bandwidth to 1.4 times. This paper reports a new type of reflectarray using rectangular DRA elements for linear R polarization. Perforated substrate and rectangular concave dipped ground plane are used to improve the gain bandwidth of the reflectarray. This paper
Slotted Tunable Reflectarray Antenna - core.ac.uk
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 ... Design and Analysis of Microstrip Reflectarray Antenna ... There are a few kinds of phase compensation methods available for the fixed-beam reflectarray such as using open-circuited stubs [4], variable patch size [5], slot-loaded ground plane [6], slot-loaded patch [7] and the usage of electronic components [8]. Stubs produce some dissipative losses as well as spurious radiation when it is being bent. (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 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 Based on Aperture-Coupled Patches With ...
In variable size patch reflectarray, the element well below the resonant frequency covers more areatakes place from the ground plane while the larger patches occupy most of the area of unit cell where the reflection isbandwidth performance of the reflectarray with variable slots in patch element. 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.
IEEE Transactions on Microwave Theory and Techniques, 1994, vol. 42, no. 8, p. 1514–1523.
US4083046A - Electric monomicrostrip dipole antennas - Google… The electric monomicrostrip dipole antenna is a family of new electric mistrip antennas. The electric monomicrostrip dipole antenna consists of a thin electrically conducting element formed on one side of a dielectric substrate; the ground … US3665480A - Annular slot antenna with stripline feed - Google… Radiation from the annular slot is provided with orthogonal linear polarization: or a continuously variable polarization such as circular or elliptical polarization in accordance with the relative phase and amplitude of electromagnetic … US5714961A - Planar antenna directional in azimuth and/or… A number of probes, coupled to the ring-slot elements, selectively excite a separate resonant mode on each ring-slot element.
Slotted Tunable Reflectarray Antenna
Bi-Function Multi-Beam Graphene Lens Antenna for Terahertz ... 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 Reflectarray Element Based on Aperture-Coupled Patches ... 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. Reflectarray with slots of varying length on ground plane ...
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 Reflectarray with variable slots on ground plane | Request PDF 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 variable slots on ground plane - IET ...