By: KA5WNX
The Delta Quad Antenna
The basic delta quad antenna is simple, yet found to be one of the easiest to put up designs for both low band and high band radio frequencies.
The delta quad claims a gain of 5 dbi 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 31 ohms to 109 ohms depending upon the transmission line used, with 52 ohms as the norm.
Separation of the center and outer conductor where the coax or other feedline connect should not extend beyond 1" inch. Always mount the Delta quad at least half of it's total length of wire, or greater height above the ground or building for best results.
Like the quad loop antenna, the delta quad loop uses the same formula for the wire loop. The delta quad is feed at the top of the triangle.
Formula: The driven element formula is: 984/frequency in MHz.
To get the inches instead of a decimal point, just subtract the feet, and multiply 12 times the decimal point left over.
The delta quad claims a gain of 5 dbi 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 31 ohms to 109 ohms depending upon the transmission line used, with 52 ohms as the norm.
Separation of the center and outer conductor where the coax or other feedline connect should not extend beyond 1" inch. Always mount the Delta quad at least half of it's total length of wire, or greater height above the ground or building for best results.
Like the quad loop antenna, the delta quad loop uses the same formula for the wire loop. The delta quad is feed at the top of the triangle.
Formula: The driven element formula is: 984/frequency in MHz.
To get the inches instead of a decimal point, just subtract the feet, and multiply 12 times the decimal point left over.
