Abstract
A novel two-layer 4 × 4 Butler matrix by feeding substrate integrated waveguide is designed and realized. The proposed Butler matrix has broadband operation frequency range of over 8.5 to 10.6 GHz with excellent phase and amplitude performance. The proposed design in this letter prevents the loss of amplitude and phase shifts in Butler matrix and decreases amplitude imbalance to less than 0.6 dB. This is achieved by reducing the size of Butler matrix and avoiding the use of a line length which causes a phase shift.
Original language | English |
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Article number | 7327245 |
Pages (from-to) | 772-774 |
Number of pages | 3 |
Journal | IEEE Microwave and Wireless Components Letters |
Volume | 25 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 2015 |
Bibliographical note
Publisher Copyright:© 2015 IEEE.
Keywords
- Beamforming feed network
- Butler matrix
- Substrate integrated waveguide
- microwave component