Double Biquad TV antenna

[aurel 22]

Easy and simple to build double biquad TV antenna ch 21-69

 

[Admin 2545]

I don't think so", let's see ... !!!

I think this is the best...

[aurel 22]

Hi JoMy

Well in my case not, i build this type of antenna for 2.4ghz few months back

and i can tell you that signal gain is lower than with ordinary double biquad.

So following logic i build this Double biquad for TV reception and work really well even without baloon tranformer.

I don't have time to exeperiment with this one for TV ,i am busy with oter things.

[Admin 2545]

Well, but my double-biquad antenna should be about 14-15dBi...!!!

[Fred 2]

On 19/09/2019 at 8:46 AM, Admin said:

Well, but my double-biquad antenna should be about 14-15dBi...!!!

I admire your confidence and hard work. Well done.

[Fred 2]

On 19/09/2019 at 8:46 AM, Admin said:

Well, but my double-biquad antenna should be about 14-15dBi...!!!

I have to try this some day. Thanks Admin. 

 

[Inspironator 0]

Can you show the gain plot for this antenna and help me with the meaning of S1, s1.  Are they the same or different meanings?  Thanks!

[clanon 246]

S11 is the measurement of the antenna (or any electromagnetic black box) of

ABSORPTION and RADIATION (efficiency)

It shows how "deep" RESONANCE is at a given Frequency and hence BANDWIDTH  (Q factor)

PS: first 1 is the energy out

and the second 1 is the ENERGY in

OUTput / INput  = Efficiency 

It should be equal or bigger than -20 db