High-gain antennas have the advantage of longer range and better signal quality, but must be aimed carefully at the other antenna. An example of a high-gain antenna is a parabolic dish such as a satellite television antenna. Low-gain antennas have shorter range, but the orientation of the antenna is relatively unimportant. An example of a low-gain antenna is the whip antenna found on portable radios and cordless phones. Antenna gain should not be confused with amplifier gain, a separate parameter measuring the increase in signal power due to an amplifying device.
আরও শক্তিশালী করার জন্য একটা ডিভাইস যুক্ত করার মাধ্যমে কতটা কার্যকরী হওয়া যায়, সেটার পরিমাপ কী?
amplifier gain