A Butler matrix is a beamforming network used to feed a phased array of antenna elements. Its purpose is to control the direction of a beam, or beams, of radio transmission. It consists of an matrix ( some power of two) with hybrid couplers and fixed-value phase shifters at the junctions. The device has input ports (the beam ports) to which power is applied, and output ports (the element ports) to which antenna elements are connected. The Butler matrix feeds power to the elements with a progressive phase difference between elements such that the beam of radio transmission is in the desired direction. The beam direction is controlled by switching power to the desired beam port. More than one beam, or even all of them can be activated simultaneously.
The concept was first proposed by Butler and Lowe in 1961.[1] It is a development of the work of Blass in 1960.[2] Its advantage over other methods of angular beamforming is the simplicity of the hardware. It requires far fewer phase shifters than other methods and can be implemented in microstrip on a low-cost printed circuit board.[3]
A Butlermatrix is a beamforming network used to feed a phased array of antenna elements. Its purpose is to control the direction of a beam, or beams...
radio waves at a single frequency at a time. The PESA must utilize a Butlermatrix if multiple beams are required. The AESA can radiate multiple beams...
Matrix Resurrections is a 2021 American science fiction action film produced, co-written, and directed by Lana Wachowski, and the first in the Matrix...
every object in the system. It was first introduced by Butler W. Lampson in 1971. An access matrix can be envisioned as a rectangular array of cells, with...
minimization or cancellation mode Conventional beamformers, such as the Butlermatrix, use a fixed set of weightings and time-delays (or phasings) to combine...
element by a certain amount of time, and then adds them together. A Butlermatrix allows several beams to be formed simultaneously, or one beam to be...
A Glitch in the Matrix is a 2021 American documentary film directed by Rodney Ascher. The film had its world premiere at the Sundance Film Festival on...
budgetary constraints allowing manufacturers to be more competitive. Butlermatrix "Infineon Hits Bulk-CMOS RF Switch Milestone". EE Times. 20 November...
delays and antenna arrays, are used in beam-forming networks such as the Butlermatrix, to create a radio beam in any prescribed direction. Star coupler Beam...
audio cassette tape system, developed by a team led by Lou Ottens. Butlermatrix for beamforming first proposed. April 3 – A Leadbeater's possum, a marsupial...
The Extractors (2019), and Keanu Reeves in The Matrix Reloaded (2003), John Wick (2014), and The Matrix Resurrections (2021). As a martial artist, Bernhardt...
London: Routledge. Butler, Judith (1999). Gender Trouble: Feminism and the Subversion of Identity. Ettinger, Bracha L. (2006), "The Matrixial Borderspace",...
bureaucracy. This may include total quality management, culture management and matrix management, amongst others. None of these however has left behind the core...
fiction film The Matrix particularly draws from Neuromancer both eponym and usage of the term "matrix". "After watching The Matrix, Gibson commented...
of machines with human-like intelligence dates back at least to Samuel Butler's 1872 novel Erewhon. Since then, many science fiction stories have presented...
William Gibson's Neuromancer novel, and movies like Blade Runner, and The Matrix. Technology portal Bright green environmentalism Ecological modernization...
phosphate into a matrix of canals. They form a ring in between the membranes, and begin to expand outwards. As they expand they make a bony matrix. This hardened...
72 kDa type IV collagenase also known as matrix metalloproteinase-2 (MMP-2) and gelatinase A is an enzyme that in humans is encoded by the MMP2 gene. The...
with other malaria vaccines. The most effective malaria vaccine is the R21/Matrix-M, with a 77% efficacy rate shown in initial trials and significantly higher...
content or extracellular matrix (extracellular matrix) content. The most common way being to look at the extracellular matrix content. The SLP has fewer...
Collins refers to the various intersections of social inequality as the matrix of domination. These are also known as "vectors of oppression and privilege"...
(PDF) on March 3, 2009. Retrieved June 27, 2008. "MediaWiki Features". WikiMatrix. Archived from the original on February 2, 2023. Retrieved February 2, 2023...
Barometer". All Things Considered. NPR. Retrieved March 14, 2018. "Decca matrix 70348. Paper doll / Mills Brothers - Discography of American Historical...
Global Information
