quick question: phased array radar

[devil6600]

hi
can anyone tell me if a phased array radar can be designed for 100mhz? if it can be done then i'll try to build one, it would be a good learning.
thanks

 

[FvM]

There's a relation of wavelength to required antenna size as well as detectable object size, that can be strongly hold against it.

 

[tony_lth]

But there are some P-band phased array radar, about 400M. Such as many wind profile radars.

---------- Post added at 22:33 ---------- Previous post was at 22:32 ----------

It is truly big of the antenna, such as VaisaLa wind profile radar, the antenna is about 2mX2mX2m.

 

[FvM]

I found references about a 8x8 m antenna array for the 400 MHz Vaisala wind profile radar, and 40x40 m for another type using frequencies around 50 MHz.

 

[tony_lth]

For the 2mX2m antenna, attached is the picture. And I don't know what the freq it is.

 

[devil6600]

thanks guys for response
i want to build it, object size/range does not matter to me, i just want to build one myself. if frequency is 2Ghz then antenna size can be reduced to few cms but how do i calculate antenna size for phased array radar? also it would require patch antenna?
thanks