Hi,
The antenna in my design is based on DN023 868M/915M PCB antenna. In order to tune it, I simulates DN023 868M PCB antenna (L6=9mm) in HFSS but gets very bad results.
The following are HFSS model parameters for the antenna:
Substrate: 0.8mm FR-4 er=4.4
Antenna is on the top of the substrate. Ground is on the bottom of the substrate. Both Antenna and ground's boundary are PerfE
Airbox shape is 345mmx345mmx345mm,(the full wave length of 868MHz is 345mm) and the antenna is in the center of the airbox.
My questions are: why I can't get good S11 results listed in DN023 document? is there anything wrong in my HFSS setup?
Thanks,
Kevin