常見(jiàn)例句雙語(yǔ)例句The small electrical antenna is characteristic of a low input impedance and a low efficiency.傳統(tǒng)的電小天線其特點(diǎn)是低輸入電阻和低效率。The Characteristic impedance and attenuation characteristic calculation of the antenna tuner for wire antennas are derived in this paper. And some analysis methods are given.本文導(dǎo)出線天線的天線調(diào)諧器的特性阻抗和衰減特性的計(jì)算，并對(duì)其進(jìn)行了分析。The process of adjusting impedance so that the input impedance of an antenna equals or approximates the characteristic impedance of its transmission line over a specified range of frequencies.天線匹配指定頻率范圍內(nèi)，調(diào)整阻抗使得天線的輸入阻抗等于或大致等于其發(fā)射線路特性阻抗的過(guò)程。 返回 antenna characteristic impedance