What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?
Short antennas are more likely to cause distortion of transmitted signals
Q of the antenna will be very low
Operating bandwidth may be very limited✓Correct answer
Harmonic radiation may increase
Explanation
Making an antenna short and resonating it with a loading coil produces a high ratio of stored to dissipated energy, which means high Q, while bandwidth is inversely proportional to Q. The usable bandwidth can shrink to a few tens of kilohertz, so the claim that such an antenna has very low Q is exactly backwards.