Miniaturization Design for 8 × 8 Butler Matrix Based on Back-to-Back Bilayer Microstrip

Table 1

The structural parameters of phase shifters with different shifted phase.

Shifted phase	𝑊1	𝑊2	𝑆1	𝑆2	𝐿1	𝐿2
22.5°	2.30	1.63	0.60	0.67	3.80	2.50
45°	2.30	1.71	0.22	0.32	4.20	4.20
67.5°	2.00	1.40	0.20	0.20	3.90	3.90

Unit: mm.