 
 <prompt> Wetin be the name of the rod wey dem dey use for radio to receive or transmit frequencies or signals? Based on the question wey dey above, write a context wey contain the answer. E fit be 1 - 20 sentences. Context: <response>: Instead, e dey often make sense to get antenna wey e impedance no dey change too much over certain bandwidth. E come be say the amount of reactance wey you go see for the terminals of a resonant antenna when the frequency dey shift, like by 5%, e dey depend well well on the diameter of the conductor wey dem use. A long thin wire wey dem use as half-wave dipole (or quarter wave monopole) go get reactance wey dey plenty pass the resistive impedance wey e get for resonance, wey go cause poor match and generally unacceptable performance. If dem use tube wey diameter be like 1/50 of e length for the element, e go get reactance for the altered frequency wey no go too much, and e go reduce the mismatch wey go only small-small spoil the antenna net performance. So dem dey use thick tubes for the solid elements of such antennas, including Yagi-Uda arrays. 