Butler Matrix
The Butler Matrix are a beamforming network which typically is used to feed a phased array of antenna elements. It controls the directions of a beam, or beams, of a radio transmission. The beam direction is controlled by switching power to the desired beam port.
The Butler Matrix are designed for wireless test applications using microstrip technology. The design and optimization was used based on computer simulations using ADS and HFSS. The hybrid couplers, cross-couplers, and the phase shifters are optimized one by one to get the best performances.
4×4 Butler Matrix (RI 3041)
2.4-8 GHz, 4x4 ports
Supports multichannel MIMO testing for up to 4+4 antenna ports, covering all present Bluetooth and WiFi bands from 2.4 to 7.125 GHz. It can also be used for antenna array beamforming and interface testing for multiple systems in the frequency range, and for multichannel multipath emulation.
8×8 Butler Matrix (RI 3101)
2.4-8 GHz, 8x8 ports
Supports multichannel MIMO testing for up to 8+8 antenna ports, covering all present Bluetooth and WiFi bands from 2.4 to 7.125 GHz. It can also be used for antenna array beamforming and interface testing for multiple systems in the frequency range, and for multichannel multipath emulation.
FAQs
A Butler Matrix is a beamforming network. It is typically used to feed a phased array of antenna elements and controls the direction of a beam, or beams, of a radio transmission.
A Tunable notch filter is used to remove a specific radio frequency, whereas the purpose of a Butler Matrix is to control the direction of a beam, or beams, of radio transmissions.
Beamforming is a technique that focuses a wireless signal towards a specific receiving device, creating a more direct connection that is faster and more reliable than having a signal spread in all directions from a broadcast antenna.
The Butler Matrix is a type of beamforming network used to control the direction of a beam, or beams of a radio transmission. The characteristics of the Butler Matrix include: – X inputs and X outputs, where X is usually 4, 8 or 16 – The inputs are isolated from each other – The phases of X outputs are linear with respect to their position so the beams are tilted off the main axis – None of the inputs provides a broadside beam – The phase increment between the outputs depends on which input is used.
