By: KA5WNX
The Single Quad Loop Antenna
The basic quad antenna is simple, yet found to be one of the sought after designs by Ham Radio Operators around the world.
The quad claims a gain of 5dbi over isotropic source. The center conductor goes to one leg of a wire loop, and the outer conductor (braided wire) goes to the other end.
The quad antenna impedance ranges from 36 ohms to 107 ohms depending upon the transmission line used.
Seperation of the center and outer conductor where the coax or other feedline connect should not extend beyond 1" inch.
Always mount the quad at least half of it's total length of wire, or greater height above the ground or building for best results.
The quad claims a gain of 5dbi over isotropic source. The center conductor goes to one leg of a wire loop, and the outer conductor (braided wire) goes to the other end.
The quad antenna impedance ranges from 36 ohms to 107 ohms depending upon the transmission line used.
Seperation of the center and outer conductor where the coax or other feedline connect should not extend beyond 1" inch.
Always mount the quad at least half of it's total length of wire, or greater height above the ground or building for best results.
The driven element formula is: 984/frequency in MHz.
For example: 98MHz in the FM Radio Band would be 984/98 Mhz.
The total length would be 10 feet and 1/2" inch.
Calculated Length = 10.048 feet.
To get the inches instead of a decimal point, just subtract the feet, and multiply 12 times the decimal point left over.
For example: 98MHz in the FM Radio Band would be 984/98 Mhz.
The total length would be 10 feet and 1/2" inch.
Calculated Length = 10.048 feet.
To get the inches instead of a decimal point, just subtract the feet, and multiply 12 times the decimal point left over.
