Null Steering in Failed Antenna Arrays

Table 1

Element excitations corresponding to Case 1.

Element position	Single null at 20° without any fault		Recovery of null with two faults at 3rd and 18th position		Recovery of null with four faults at 2nd, 3rd, 18th and 19th position
	Amplitude	Phase (Deg)	Amplitude	Phase (Deg)	Amplitude	Phase (Deg)
1	0.2528	0.0887	0.0183	5.0180	0.0493	7.9004
2	0.2498	3.2166	0.1109	2.3413	0.0000	0.0000
3	0.3713	1.7141	0.0000	0.0000	0.0000	0.0000
4	0.5084	2.2080	0.2727	2.6761	0.3252	3.6915
5	0.6307	0.4111	0.4391	2.1064	0.4086	6.1520
6	0.7114	0.2294	0.5917	4.4168	0.6109	5.7187
7	0.7839	0.5271	0.7583	1.5168	0.7446	4.2470
8	0.8678	0.2244	0.8502	2.3563	0.8904	1.8244
9	0.9374	0.4477	0.9469	1.0522	0.9640	0.3368
10	1.0000	0.0560	1.0000	1.3101	1.0000	0.0005
11	1.0000	0.0560	1.0000	1.3101	1.0000	0.0005
12	0.9374	0.4477	0.9469	1.0522	0.9640	0.3368
13	0.8678	0.2244	0.8502	2.3563	0.8904	1.8244
14	0.7839	0.5271	0.7583	1.5168	0.7446	4.2470
15	0.7114	0.2294	0.5917	4.4168	0.6109	5.7187
16	0.6307	0.4111	0.4391	2.1064	0.4086	6.1520
17	0.5084	2.2080	0.2727	2.6761	0.3252	3.6915
18	0.3713	1.7141	0.0000	0.0000	0.0000	0.0000
19	0.2498	3.2166	0.1109	2.3413	0.0000	0.0000
20	0.2528	0.0887	0.0183	5.0180	0.0493	7.9004