Can you name any of the two way antenna manufacturers that do? 73 Gary K4FMX
> -----Original Message----- > From: Repeater-Builder@yahoogroups.com [mailto:Repeater- > [EMAIL PROTECTED] On Behalf Of Ron Wright, Skywarn Coodinator > Sent: Tuesday, February 20, 2007 8:52 AM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Re: Antenna gain specs > > Gary, > > Most of the commerical guys do have test ranges and some very > detailed and well engineered. > > Most common below 1 GHz antennas were around long before computers > like the PC were avialable and their technology, although sound and > good, are old, go back into the 50s. > > Some of the broadcast guys are really getting serious. They have all > kinds of ways of looking at antenna performance like just measuring > the current distribution on the antenna elements to determine > performance. A broadcast antenna must meet some FCC certification > for performance/gain/pattern before it can be used because ERP is the > standard for power. > > There has been lots of advancement in computer modeling and bet many > not so good manufactures do use computer modeling as you said. > > 73, ron, n9ee/r > > > > > > > It is also interesting to note that hardly any of the manufacturers > of two > > way antennas actually have an antenna test range or have ever > tested the > > antennas on a range. Most all the patterns that you see in the > catalogs are > > computer generated. > > > > 73 > > Gary K4FMX > > > > > > > > > > Yahoo! Groups Links > > >
