Generation of OAM Radio Waves Using Circular Vivaldi Antenna Array

Table 1

Detailed dimensions (unit: mm).

𝑙1	3.75
𝑤1	3.6
𝑙2	4.25
𝑤2	1.6
𝑙𝑓	7
𝑤𝑓	0.4
𝑙𝑔	60
𝑤𝑔	30
𝑙𝑎	30
𝑙𝑏	16
𝑙𝑐	1.4
𝑟𝑠	2
𝑟out	40
𝑟in	39.2