| 摘要 |
An antenna arrangement (300) comprises a ground conductor (102) on which is mounted an antenna (304). The antenna is small relative to a wavelength at operational frequencies of the antenna arrangement (300) and the dimensions of the antenna (304) are selected so that the combined impedance of the antenna (304) and ground conductor (102) is suitable for driving via a conventional matching circuit. This condition is met when the bandwidth of the arrangement is dominated by that of the antenna and ground conductor, rather than that of the matching circuit. In one embodiment the antenna is a triangular conducting element which is considerably wider than its height, the length being sufficient to give a reasonable resistance and the width being sufficient to reduce the reactance to a level that can reasonably be matched. |
