# x band phase array antenna?

Status
Not open for further replies.

#### jaehlee99

##### Junior Member level 1
In the X-band system, I would like to guess the size of phase arrary antenna. Assuming the 42dBi, how many radiator do I need to achieve 42dBi gain? What is the array size?

#### zlatkoMM

##### Full Member level 5
If we use that phase array is created by loop (full wave size) is cca 2dB(maximum) than you can easy calculate 42dB.
42/2 = 21 ~ 20 elements.
of course if you build antenna for example wifi 2.4Ghz then there is no problem in size but for larger vawe lenght might
be a problematic. One of options is qurtain quad as good shape of phase array type of antenna.

good luck..!

didaremf

### didaremf

Points: 2

#### jaehlee99

##### Junior Member level 1
If we use that phase array is created by loop (full wave size) is cca 2dB(maximum) than you can easy calculate 42dB.
42/2 = 21 ~ 20 elements.
of course if you build antenna for example wifi 2.4Ghz then there is no problem in size but for larger vawe lenght might
be a problematic. One of options is qurtain quad as good shape of phase array type of antenna.

good luck..!

Thank zlatkoMM,

In case of CCA, how much does the sidelobe have ?

#### zlatkoMM

##### Full Member level 5
In case of CCA, how much does the sidelobe have ?

jaehlee
I am not sure that i properly understand word 'sidelobe' ??
In real 1.2dB gain have ordinary dipole, but because one loop of full vave have 2 dipole (2.4) and + lost is circa about
2.

Status
Not open for further replies.