hfss rfid input power problem

hy for all I'm trying to simulate rfid microstrip antenna with complex input impedance witch 25.5 +145*j

i used a lumped port for the exitation
my problem is that when i use a power of 1w as source i find in result
incident power = 5.74
accepted power = 0.17
radiated power is 0.06

the obtained gain is 0.45
and the directivity is 4.82

i can't find out the sollution pleeaze does any one know about this

why there is no perfect E in your design?
why patch is has not assigned boudaries?

in fact am using directly a materialized pach with 33 micrometer thickness by assigning martial to be copper it seems to be more realistic since it is close to reality
and it don't affect the sumulation too much but my problem is that when using a complex lumped port for excitation the power is strangely modified