双频带巴伦馈电的宽带双频印刷偶极子设计

研究一种巴伦馈电双频印刷偶极子天线。为了使印刷偶极子天线工作在WLAN 频段，H 形状的缝隙开在偶极子两个臂上。优化无巴伦馈电的辐射单元，使得天线在回波损耗小于-10 dB 的情况下工作在2.4 GHz (2180-2750 MHz)和5.2 GHz (5040-5480 MHz)。为了展宽带宽，本文设计了一种改进的Marchand 巴伦，它能提供两个谐振点以增加阻抗带宽。通过优化辐射单元和双频带巴伦，设计了工作在2150-2750 MHz 和5050-6230 MHz 的印刷偶极子天线。设计公式在文章中已经给出，计算和测试结果吻合得很好。

Wideband and Dual-Band Design of Aprinted Dipole AntennaIntegrated With Dual-Band

A dual-band printed dipole antenna with integrated balun feed is given in this paper. H-slot is etched on the armsof the printed dipole antenna to achieve the dual-band operation with resonances at WLAN bands. The radiating element withoutbalun is optimized and operates at 2.4 GHz (2180-2750 MHz) and 5.2 GHz (5040 MHz-5480 MHz) where return loss are less than-10 dB. In order to further get a lager bandwidth, a modified Marchand balun is designed for dual-band operation, which canprovide two resonances in each band to enhance impedance bandwidth. By co-designing the radiating element with the dual-bandbalun, an antenna covering 2150-2750 MHz and 5050-6230 MHz bands has been achieved. The design equations for modifiedbalun have been presented and agreement between calculation and measurement is good.