Research Article
Flexible Phase Difference of 4 × 4 Butler Matrix without Phase-Shifters and Crossovers
Figure 8
Output phase difference of the Butler matrix when: (a) port 1 is excited; (b) port 2 is excited; (c) port 3 is excited; (d) port 4 is excited.
(a) |
(b) |
(c) |
(d) |