In this paper, a rectangular triple-band microstrip antenna has been designed for Bluetooth application by successively loading notches and slots of different dimension in radiating patch. The conventional microstrip antenna suffers with narrow impedance bandwidth. The current work affords an alternate option to enhance the bandwidth of antenna that resonates in triple-band operation. Initially, the antenna is resonating in single-band but after loading slots, the bandwidth of microstrip antenna has been obtained 1.97% (lower band), 10.35% (middle band) and 33.16% (upper band) resonating in triple-band with three resonant frequency at 1.422 GHz (lower resonant frequency), 1.791 GHz (middle resonant frequency) and 2.467 GHz (higher resonant frequency). The suggested antenna has upper frequency band in the range of 2.045–2.858 GHz resonating at 2.467 GHz frequency and it is appropriate for Bluetooth applications (2.40–2.48 GHz) and both lower band useful for other wireless (L-band) applications. The return loss of upper band is − 34.52 dB at 2.467 GHz. The suggested microstrip antenna is directly fed by 50 ohm microstrip line feed. The suggested antenna has been designed, simulated and analyzed by IE3D simulation software.

本文通过在辐射贴片中连续加载不同尺寸的缺口和缝隙，为蓝牙应用设计了矩形三频微带天线。常规的微带天线具有窄的阻抗带宽。当前的工作提供了另一种选择，以增强在三频操作中谐振的天线带宽。最初，天线在单频带中谐振，但是在加载时隙后，微带天线的带宽已获得三重谐振的三频带（分别为1.97％（低频带），10.35％（中频带）和33.16％（高频带））谐振。谐振频率为1.422 GHz（较低的谐振频率），1.791 GHz（中等谐振频率）和2.467 GHz（较高的谐振频率）。建议的天线具有在2.045–2.858 GHz范围内以2谐振的较高频带。频率为467 GHz，适用于蓝牙应用程序（2.40–2.48 GHz），并且两个较低频段均适用于其他无线（L波段）应用程序。在2.467 GHz时，高频带的回波损耗为− 34.52 dB。建议的微带天线直接由50欧姆微带线馈电馈电。建议的天线已通过IE3D仿真软件进行了设计，仿真和分析。