votientu
Member level 2
Hi every one, I refer one document about ITS (intelligent transport system) and it make me so confused.
Firstly, I just care about ITS's antenna so I just ask you about its antenna like others application.
For example, it works between 5855-5925MHz (70MHz bandwidth), and it does not interfer other app.
So, it has some conditions such as: < -55 dBm/MHz e.i.r.p. below 5850 MHz , what does this mean, please ???
In my opinion, I can design an antenna radiate at 5.9GHz but it's very hard to make it like a filter just radiate
at 5.9GHz (S11 at 5.9 is -40dB) and very small radiation at 5.850 (S11 is -3dB) to have e.i.r.p <-55dBm/MHz below 5850 MHz
Thank you !
Firstly, I just care about ITS's antenna so I just ask you about its antenna like others application.
For example, it works between 5855-5925MHz (70MHz bandwidth), and it does not interfer other app.
So, it has some conditions such as: < -55 dBm/MHz e.i.r.p. below 5850 MHz , what does this mean, please ???
In my opinion, I can design an antenna radiate at 5.9GHz but it's very hard to make it like a filter just radiate
at 5.9GHz (S11 at 5.9 is -40dB) and very small radiation at 5.850 (S11 is -3dB) to have e.i.r.p <-55dBm/MHz below 5850 MHz
Thank you !