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Hi!
I'm doing a bit of research work on Full Duplex simultaneous wireless communications, and multiple transmit antennae are used in my proposed system. I am still in the early stages of my research work, and I do not have experience with designing antennae yet. So I have a lot of doubts on how multiple antenna systems work in practice. I will take the case of MIMO, since it is an existing technology.
In my work, I am focussing on Half Wave dipole antennae. The operating frequency is around 5 GHz (WiFi 802.11n) if it helps.
As I understand it, multiple antennae are placed near to each other in a MIMO system. I've read up some theory on antennae, and I have come across something called mutual coupling that reduces the power transferred to a remote receiver if an antenna is close to other antennae in the near field. So won't mutual coupling affect MIMO transmission? Or is the antenna separation in a way that mutual coupling won't be an issue? I understand that diversity schemes require antenna to be separated by about half of the wavelength of transmission. As this distance comes within the near field, won't mutual coupling be a problem? How are antennae separated in MIMO systems?
Is it possible to calculate how much power would be transferred to a nearby antenna (if I understand the phenomenon correctly) because of mutual coupling? That would be of particular interest to me, as it has direct implications on my work.
I hope someone can give me some insight on this, since google seems to have failed me.
I'm doing a bit of research work on Full Duplex simultaneous wireless communications, and multiple transmit antennae are used in my proposed system. I am still in the early stages of my research work, and I do not have experience with designing antennae yet. So I have a lot of doubts on how multiple antenna systems work in practice. I will take the case of MIMO, since it is an existing technology.
In my work, I am focussing on Half Wave dipole antennae. The operating frequency is around 5 GHz (WiFi 802.11n) if it helps.
As I understand it, multiple antennae are placed near to each other in a MIMO system. I've read up some theory on antennae, and I have come across something called mutual coupling that reduces the power transferred to a remote receiver if an antenna is close to other antennae in the near field. So won't mutual coupling affect MIMO transmission? Or is the antenna separation in a way that mutual coupling won't be an issue? I understand that diversity schemes require antenna to be separated by about half of the wavelength of transmission. As this distance comes within the near field, won't mutual coupling be a problem? How are antennae separated in MIMO systems?
Is it possible to calculate how much power would be transferred to a nearby antenna (if I understand the phenomenon correctly) because of mutual coupling? That would be of particular interest to me, as it has direct implications on my work.
I hope someone can give me some insight on this, since google seems to have failed me.
