Antenna Db

[bravokilo]

Ahlburuto, hi! Si BravoKilo ito, may mga discussion ata sa Absolute Beginner on antennas.  Yep the ARRL antenna Handbook will help. Kaso wala na namin makita sa market.  The last one sold was P800, orig at locally printed.  May nagawa kaming xerox and we are willing to let go for P500.

I cut antennas for two way radios at any frequency.  Sa tanong mo, thebest for your plce would be a log periodic array or stacked dipoles.  Marami makita nito sa Norte at ang gamit nila kawad, di aluminum.

You have to know kung may relay and TV stations dyan.  Gie me your exact location. Tignan ko sa map at anong mayroon dyan.problema kung nasa likod ka ng Makiling.

Kung talagang fringe area ka, log periodic is my recommendation kung isa lang ang antenna gusto gamitin. Ang log periodic kasi mas malakin ang bandwith,meaning masagap niya mas maraming stations. Nest wold be the stacked array.  makita mo apat, anim o walong tenga tenga horizontally positioned. Pag folded dipole, 300 ohms ang isa. May computation yan to get the resulting impedance.  Kung dedicated naman, gamitin mo ng Yagi antenna. Naka tuned dun sa specific TV station.  Yung tanong sa decibel, sa libro yan as you add more directors.energy is not increased but focused on the receiving element.  Yung tinatagan na "lobes". Evry 3 db doubles the signal strength.  Yung  dipole in free space is considered the standard at 1 db daw yun. 

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