context: Although a resonant antenna has a purely resistive feed-point impedance at a particular frequency, many (if not most) applications require using an antenna over a range of frequencies. An antenna's bandwidth specifies the range of frequencies over which its performance does not suffer due to a poor impedance match. Also in the case of a Yagi-Uda array, the use of the antenna very far away from its design frequency reduces the antenna's directivity, thus reducing the usable bandwidth regardless of impedance matching.
question: యాంటీనా ఫ్రీక్వెన్సీ (Antenna 's frequency) ఉపయోగించదగిన స్పెక్ట్రమ్ను సూచించడానికి ఏ పదాన్ని ఉపయోగించవచ్చు?
answers: bandwidth