RF is RF, it should work. And 75 ohms is not that much of a mismatch for pro wireless audio systems.
However, the point may be moot, since any ultra-wideband antenna will exhibit different impedance values at different frequencies within its tuned range. I have measured well performing antennas, that are sold as pro audio gear with 50 Ohm impedance, which have actual impedance ranging from 25 to 80 Ohms across their range, yet still showed acceptable return loss of -10dB to -30dB throughout their range when connected via 50 Ohm cable to test equipment calibrated to 50 Ohms.
Is (Though I don't necessarily agree that an RL of -10dB is acceptable - it certainly isn't in the LMR, cellular and microwave industries, where higher power is the norm. Although it's only 10% reflected power, that could be enough to upset an IEM/IFB PA without an isolator.)
+1And, it works in reverse also.Our Professional Wireless Systems helical antenna gets terrific digital tv reception. It was one of those "Why didn't we think of that sooner?" moments !
Hi Henry,I'm with you 100% on that. Fortunately, values that poor usually show up at the extreme edges of the published range of operation. There are exceptions, though.Here's a plot of a very commonly used $900 German antenna, brand new and fresh out of the box. My instruments were calibrated to the cable connector at the antenna end. I have tested several of these, from different production lots, in different audio shops and at different venues, and the plots are almost identical. The low end of the band leaves much to be desired. The readouts in the right column are for the cursor location near 470 MHz, and it's downright awful.
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