Simulation of two monopole antenna

1. The difference betwen S11, S22; S21 and S12;
2. i would like to visualise the horizontaal Gain so i clik in create far field report ;radiation patern but i found this fig but in my cas i want just one curve.
3. i would like to know if i can know the value of these paramters
   • the distance between transmitting and receiving antennas;
   • the maximum directivities of the transmitting antenna and receiving antenna;
   • the distance between the image of the transmitting antenna and receiving antenna.
   • the value of S11,S12,S22
   from the hfss simulation .

ings said:

Hello, i succed to simulate two monopole antenna in hfss but i dont understand the simulation results because i m beginner in hfss:

1. The difference betwen S11, S22; S21 and S12;

Click to expand...

1. 
   RF books will teach you about S-parameter. Guillermo Gonzalez, "Microwave Transistor Amplifiers, Analysis and Design, 2nd. Ed.", Prentice Hall, New Jersey is the best book i came across in this subject matter.
   
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   ings said:

   [*]the distance between transmitting and receiving antennas;
   [*]the maximum directivities of the transmitting antenna and receiving antenna;

   Click to expand...

   this i think involve friis equation. i dont know if hfss has it because im not familiar with the software