Not true at all. Since the gain of a Yagi comes from focusing the RF energy in a particular region, and that gain is measured against either an omni-directional antenna (dBi - gain in dB compared to an isotropic antenna) or against a standardized dipole (dBd), the two antennas in question in the original post (the G7 - an omni, and a Yagi) can't have the same gain. http://whatis.techtarget.com/definition/0,,sid9_gci214570,00.html
The two antennas do need to present the same impedance at the frequency of interest in order for the power dividers to work as designed. The power dividers are based on the impedance matching characteristics of the 1/4 wavelength line section. If the impedance of the two antennas don't match, the power division will be skewed accordingly. The products previously offered by ZD Engineering back in the 90s all took advantage of this. ZD Engineering was bought out by another organization, and I think those people are part of this list IIRC... At 07:50 PM 2/19/2008, you wrote: >I was told once a long time ago that the antennas need to be the same gain, >Is this true? > >Rod > > > > > >Yahoo! Groups Links > > >
