about antenna coupling

[flywke]

Hi
anybody knows of wide beam antenna coupling, the -3dB beamwidth is 90 deg.
And one is transmitting antenna,the other is receive antenna, the work frequency is in the millimeter wave scope, the distance between them is about 20λ.
Please tell me how to deal with this task ?and if this project can acted as a PH.D project?
Thanks in advance!

 

[plasma]

I attached this PDF look at chapter 14.4 to end

pl

 

[flywke]

These two antennas with large electrical size are set side by side, the distance between them is about 20λ. They act as transmitting and receiving antennas of cw radar.The aim to analyze the mutual coupling is to decrease the influence of coupling.

 

[serdaraga]

mutual coupling is directly related with seperation of the antennas
so with one parasitic element placed 20 lam. away from the transmitter
wouldnot generate big mutual impedance so no big deterioration in the patern
even there is large beamwidth. by the way a cw radar or an altimeter that kind
of mc investigation can be a BS thesis but IMHO not an MS thesis.
After all you should think of the whole patern of the antennas not only the
main beam width, with 2 elements there is only one degrees of freedom
so beamforming MC compensation is problem. but shielding between the antennas may help reducing MC effects but badly effects the directivity and patern.