antenna receiver (410 Mhz)

[mot1622]

hiii,

i try to fined solution for my problem , i'm using transmitter (410 Mhz) low ( gain , voltage) (i can't change Tx) with distance 4 Km (not LOS) walls .

which antenna can receive propagation wave ( reflection , refraction ..) , i'm using yagi antenna with 40 db and i can't receive signal .

how can receive receive propagation wave ( reflection , refraction ..) with out change Tx and what the perfect Rx antenna with specification for that .

for more infor contact whit me

thanks for helping

 

[Moleculo]

Try two or more yagis in a phased array.

 

[mot1622]

?

thank you Moleculo for replay

that mean use two or more phased array antenna like :

RPG - SXDD0510 - UHF


or by this antenna :

Active Highend measurement antenna Aaronia HyperLOG 4060X. 


regards

 

[Moleculo]

thank you Moleculo for replay

or by this antenna :

Active Highend measurement antenna Aaronia HyperLOG 4060X.*

That antenna shows 45dbi gain! It looks to me like a log periodic design. If it really has 45dbi gain, that's the one I would try!

 

[mot1622]

??

hii Moleculo

but what about the multipath propagation (reflection ....) it can receive signal

and what about phased array antenna can solve multipath propgation


thanks

 

[W5LZ]

I think your best bet would be the 'multi' phased array solution. While that second antenna would be very nice for DF'ing and testing, it isn't a practical antenna for daily use. (Not to mention cost!)
The more antenna elements in an array, the better the signal, but there are limits to that. There are diminishing returns for each additional array element. One of those limits is in the resulting size of the array, not to mention cost again.
Reflections, multi-path, etc, are also problems, but usually can be 'worked around' by positioning and phasing of each element. That can get very, very complicated very fast.
- 'Doc