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Showing 1 to 5 of 5 for “"Butler Matrix"”.
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Single-band and Dual-band Beam Switching Systems and Offset-fed Beam Scanning Reflectarray
… Each layer covers three frequency bands. A Butler matrix is one of the useful beamforming networks for a phased array antenna. A Double-Sided Parallel-Strip Line (DSPSL) is adapted for the feeding network of eight array elements. The DSPSL operate very well to feed the microstrip antenna …
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Multi-beam Antenna Arrays for Base Stations in Cellular Communication Systems
… a multi-beam antenna implemented using a Butler matrix feed network which is approaching high frequency limitations of loss and complexity and secondly, a multi-beam antenna based on a spherical Luneburg lens implemented with an artificial dielectric material which is approaching low …
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Circuit Techniques for Multiple and Wideband Beamforming
… fashions the architecture is quite similar to a Butler matrix but unlike the Butler matrix it does not use large passive components at RF. Further, we exploit the normally occurring quadrature down-conversion process to implement the tap weights. In comparison to traditional MIMO architectures, …
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Switched beam array antenna for 2.45 GHz RFID localisation
… elements require to drive the antenna array, the Butler matrix (BM). Fabricated circuits achieve significant size area reduction with similar performances compared to the conventional ones. These developments will have wide application beyond the RFID localisation system.Finally, accuracy of the …
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Exploitation of Modes in Circular Antenna Arrays
In this thesis modes on circular antenna arrays are investigated and exploited. Circular antenna arrays are specifically chosen because of their symmetric structure which enables continuity of surface currents and symmetric mutual coupling between elements of the array. This makes circular array …