I never thought I'd come to this, what's this aaaaaaaaall about?

[Kostas Liakakis]

"Christos Ricudis" <ricudis at paiko.gr> wrote in message
news:MSGID_2=3A413=2F11.98=40fidonet_9f4b0368 at fidonet.org...
> Hello Kostas!
>
>   On 23 Oct 01, Kostas Liakakis wrote to Christos Ricudis with subject
"Re: I
> never thought I'd come to this, what's this aaaaaaaaall about?":
>
>  KL> H keraia exei kapoio kerdos (gain). Me alla logia enisxuei thn
>  KL> ekpomph. Opos blepeis akomh kai h mh kateu0yntikh exei gain 8dbi.
>  KL> H plhros kateu0yntikh, exei 24dbi gain mias kai ekpempeis pros
>  KL> mia sygkekrimenh kateu0ynsh.
>
> H keraia enisxyei thn ekpomph. Mprabo, molis parabiases thn arxh
diathrhshs ths
> energeias (ontws, telika ekanan la8os :>).
>
> Ayto poy allazei einai h pyknothta isxyos, Watts/m^2, kai akribws ayto
> ekfrazei to gain. To gain einai o logos ths isxyos poy apaiteitai sthn
eisodo
> ths keraias mas pros thn isxy eisodou mias isotropikhs keraias wste h
entash
> toy HM pediou sthn idia apostash na einai idia stis dyo keraies. Se
periptwsh
> poy den orizetai katey8ynsh, 8ewroume to maximum gain ths keraias, poy
> brisketai sthn koryfh toy main lobe - ekei ekfrazontai kai ta 24dbi twn
> paraflextors.

Nai mana mou, alla auth ton 24dbi einai kateu0yntikh me euros 10 moires V
kai 5-6 H.

> To orio asfaleias ths IEEE gia pyknothta isxyos einai peripoy 1mW/cm^2 se
mh-
> elegxomeno periballon. H wavelan kartoula moy exei megisth isxy ekpomphs
> nomizw gyrw sta 30 mW.


Ego to exo diabasei san 14dbm. Einai 25mW. sto egrapsa.


> Exoume 24db gain, opote :
>      30(mW)*10^(24/10)
> Pd = ----------------- = 0.0599972873 mW/cm^2
>      4*3.14*100(cm)^2

Eimape, den einai omni-directional, alla uni-directional. H omni pou exo
ypospin mou einai gyro sta 8dbi.

-K.