sassyboy
Full Member level 1
- Joined
- Sep 20, 2003
- Messages
- 98
- Helped
- 28
- Reputation
- 56
- Reaction score
- 13
- Trophy points
- 1,288
- Location
- United Kingdom
- Activity points
- 1,426
Hello. I am working on a project to improve wifi strength of an android tv box in a classroom. It comes with a 50 ohm dipole antenna. In the classroom, the router or repeater is situated in the rear of the classroom. I proposed replacing the antenna with a transmission line fed patch antenna. Simulation indicates 7.14dBi directional gain compare to under 3dBi in the dipole. I was quite positive with my proposal.
I installed the "Wifi Analyzer" app to measure the signal strength of both dipole and the patch. I designed the patch using FR4 substrate and measured the return loss on VNA. When I plugged the dipole antenna, the app measured signal strength of -50dB, while the patch antenna measured lower at -58dB. I was disappointed that it didn't work to my expectation.
I have come to a conclusion that the wall in the classroom scatter the EM waves which meant that the omnidirectional antenna has an advantage over the more directional patch antenna. Would you agree?
I am planning to try a PIFA antenna or a circularly polarised patch antenna to see if this improves the signal strength. Does anyone have a suggestion?
I installed the "Wifi Analyzer" app to measure the signal strength of both dipole and the patch. I designed the patch using FR4 substrate and measured the return loss on VNA. When I plugged the dipole antenna, the app measured signal strength of -50dB, while the patch antenna measured lower at -58dB. I was disappointed that it didn't work to my expectation.
I have come to a conclusion that the wall in the classroom scatter the EM waves which meant that the omnidirectional antenna has an advantage over the more directional patch antenna. Would you agree?
I am planning to try a PIFA antenna or a circularly polarised patch antenna to see if this improves the signal strength. Does anyone have a suggestion?