The PacketRadio Operator's Antenna Handbook

QUICK INDEX

An improved 6 Meter "High-Performance" Base-Station Dipole.

HF Antenna Cutting Chart

VHF & UHF Antenna Cutting Chart

Determine correct spacing between antennas to achive proper isolation.

A two meter dipole

It's very portable and EZ to build; A TV twin-lead two meter J-Pole

Detailed drawing of a two meter "J" Pole antenna.

Detailed drawing of a six meter "J" Pole antenna.

Design your own "J" Pole antenna.

Design your own QUAD antenna.

A 4 element, six meter QUAD design using Design-A-Quad.

Lots of Antenna, RF Field, Path Loss, Free Space Loss, VSWR, ETC.. CALCULATORS.

BUT FIRST.... let's review some antenna "basics" in pictorial form.

CLICK ON the small graphic to view full size.

CLICK ON the small graphic to view full size.

CLICK ON the small graphic to view full size.

A=Benz-O-Matic propane torch; B=Lead-Free solder; C=Tape measure: D=Tubing cutter; E=Sharpie marking pen; F=Solder Paste; G=1/2 inch copper caps; H=Hardcopy of the above drawing; I=Wet Towel; J=PreCut, ready to assemble parts of the 2 meter J-Pole.

CLICK HERE AND DESIGN YOUR OWN "J" Pole

Design-A-Quad Antenna

Calculate the total wire length for each element of a quad antenna.
REFLECTOR = 1030 / F (MHz)
DRIVEN = 1005 / F (MHz)
DIRECTOR 1 = 975 / F (MHz)
DIRECTOR 2 = 960 / F (MHz)

ELEMENT SPACING between:
1) Reflector & Driven Element = 730 / F (MHz)
2) Driven Element & 1st Director= 600 / F (MHz)
3) 1st Director & 2nd Director = 600 / F (MHz)

Enter the formula for the antenna calculation
Divided by Freq MHz

Total wire-length in feet is FEET.
Total wire-length in inches is INCHES.
One of four sides in FEET = <- Use ONLY this number for "element spacing" when entering the element spacing numbers (constants; 730 or 600) above!
Total all spacing measurements (in inches) then add 2 inches for each end.

THE QUAD SHOWN BELOW IS AN EXAMPLE OF A QUAD DESIGN USING DESIGN-A-QUAD ABOVE

Calculate Vertical Isolation of Omni Antennas! CLICK the "BACK" arrow to return to this page!

Calculate Horizontal Isolation between Omni Antennas CLICK the "BACK" arrow to return to this page!

Calculate Base to Mobile Path Loss CLICK the "BACK" arrow to return to this page!

Calculate Free Space Path Loss CLICK the "BACK" arrow to return to this page!

Convert dBs - Watts/volts CLICK the "BACK" arrow to return to this page!

Calculate (absolute) Wavelength CLICK the "BACK" arrow to return to this page!

Calculate VSWR (Standing-Wave) CLICK the "BACK" arrow to return to this page!

Calculate 1/4 wave xformer CLICK the "BACK" arrow to return to this page!

Grouped Calculation Formulas CLICK the "BACK" arrow to return to this page!

Buck "[email protected]"

© 0110 1996-99 G. E. "Buck" Rogers Sr.

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