A Multiple Resonant Frequencies Circular Reconfigurable Antenna Investigated with Wireless Powering in a Concrete Block

Table 1

Resonating frequencies of the CRA.

Iteration	Number of resonating frequencies	Resonating frequencies (GHz)
1	3	3.04, 6.4, 7.03
2	4	6.55, 6.85, 8.92, 9.04
3	5	6.58, 6.67, 6.97, 8.5, 9.13
4	4	4.27, 6.64, 6.91, 8.44, 9.13