Radiation Efficiency Improvement Method for Multifeed Circular Polarization Antenna Array with Mutual Coupling Effect

Table 2

Measured improved input impedance of each port.

Port	𝑎1	𝑎2	𝑎3	𝑎4	𝑎5	𝑎6	𝑎7
Impedance	52−17∗𝑗	48−23∗𝑗	53−21∗𝑗	61−19∗𝑗	56−16∗𝑗	51−21∗𝑗	56−28∗𝑗
Port	𝑏1	𝑏2	𝑏3	𝑏4	𝑏5	𝑏6	𝑏7
Impedance	55−6∗𝑗	53−16∗𝑗	54−27∗𝑗	51−22∗𝑗	55−17∗𝑗	56−29∗𝑗	59−22∗𝑗