Flexible Phase Difference of 4 × 4 Butler Matrix without Phase-Shifters and Crossovers

Table 2

Characteristic impedance and electrical length of the coupler.

Phase difference (°)	Parameter
	30	25	22.361	22.361	90	127.76	52.24
120	43.301	32.733	32.733	90	69.295	110.705
60	43.301	32.733	32.733	90	110.705	69.295