2-Meter (144-148 MHz) 4-Element Cubical Quad Antenna, dimensions per On-Line Calculator. Q: Suppose it was connected to a TV.....analyzed using 4nec2.
Several On-Line Calculators return the same design, such as: http://www.csgnetwork.com/antennae5q2calc.html
Ch2-6 & FM Band: Mostly omnidirectional, but with no more Raw Gain than Rabbit Ears and Very Excessive SWR.
Ch7-13: About 3 dBi Raw Gain, but with maximum in the REVERSE direction. SWR is still excessive, although using a 300-ohm Balun vice normal 50-ohm connection can provide a moderate improvement.
UHF: Azimuthal Patterns are very inconsistent with very low Raw Gain. Maximum Gain is on Rear Sidelobes on Ch14, off to the Sides on Ch32, Forward on Ch51 and off to the Sides on Ch69. SWR is excessive on many channels, although using a 300-ohm Balun vice normal 50-ohm connection can provide a significant improvement.
SUMMARY: Poor SWR, but Raw Gain is minimally usable on Ch7-13. UHF is extremely poor.
Date(s): 14 Jun 2010. Album by holl_ands. 1 - 11 of 11 Total. 12142 Visits.
enlarge 72KB, 1024x716 1 4-Element 2-m Cubical Quad - per On-Line Calculator 3D View
enlarge 160KB, 1024x662 2 4-Element 2-m Cubical Quad - per On-Line Calculator Top View
enlarge 217KB, 1024x844 3 4-Element 2-m Cubical Quad - per On-Line Calculator Front View
enlarge 154KB, 1152x584 4 4-Element 2-m Cubical Quad - per On-Line Calculator 2-meter Raw Gain FORWARD
