Topic: Criteria of optimum design of printed antenna(surface mount antenna)

Criteria of optimum design of printed antenna(surface mount antenna) What criteria should we look and compare which is the optimum printed or surface mount antenna.   Criteria Must include:(could add more criteria if you can find)  1. Antenna Shape: Triangle;Square;rhombus;etc.  2. Resonate Frequency.  3. Bandwidth.  4. Total Efficiency.  5. Return Losses.  6. Matching(Impedance Matching).  7.Key Factors Affecting the Performance of printed antenna or surface mount antenna