 
 <prompt> How person fit sabi the wave? Based on the last question, write small tori wey get the answer. E fit be 1 - 20 sentences. Context: <response>: For example, for 30 MHz (10 m wavelength) true resonant 1⁄4-wavelength monopole go dey almost 2.5 meters long, and if you use antenna wey only 1.5 meters tall, you go need to add loading coil. Dem fit talk say the coil don lengthen the antenna to achieve electrical length of 2.5 meters. But the resistive impedance wey go dey achieved go dey lower pass the impedance of resonant monopole, and e fit need further impedance matching. Apart from lower radiation resistance, the reactance go dey higher as the antenna size dey reduce, and the resonant circuit wey dey form from the antenna and tuning coil go get Q factor wey go rise and eventually cause the bandwidth of the antenna to no dey enough for the signal wey dey transmitted. Na this one dey set the size of antennas for 1 MHz and lower frequencies. 