Plain-language answer: Resonance removes feedpoint reactance at one condition, but the best field antenna must also satisfy efficiency, bandwidth, pattern, size, support, and mission needs.
Why it changes the result
A resonant antenna may present an inconvenient resistance or pattern; a well-designed nonresonant system can be more practical and effective.
What to verify
Compare the complete system and intended path, then measure R, X, loss, bandwidth, and field behavior in the installed geometry.
The common mistake
Treating resonance as a universal quality score.
Complete-system boundary
Match the exact radiator, feed system, return path, frequency, height, orientation, and environment. Connector or thread fit does not establish electrical compatibility, structural capacity, or safe operation.
