A design of broadband dual-polarized antenna with low cross polarization and high isolation was presented. The antenna is composed of a cross dipole, a folded ground, two feeding networks, and a reflector. The impedan...A design of broadband dual-polarized antenna with low cross polarization and high isolation was presented. The antenna is composed of a cross dipole, a folded ground, two feeding networks, and a reflector. The impedance bandwidth was enhanced by utilizing the mutual coupling between the two dipoles. A kind of meandering folded Marchand balun was skillfully integrated on the support column of the antenna to excite the dipole differentially, which can deliver both balanced （within 0.5 dB） power splitting and consistent （±5°） phase shifting from 1.71 GHz to 2.17 GHz. The standing wave ratios （SWRs） of each port are less than 1.5. By using this feeding network, the antenna has good performance in isolation （〉 45 dB） and cross polarization （〉 30 dB） over the entire operating frequency band. Moreover, the gain （-8.6 dB） of the proposed antenna is stable with frequency and the antenna structure is very firm due to the support column. The proposed antenna can be easily formed an array for digital cellular system （DCS）, personal communications service （PCS） and 3rd generation （3G） applications.展开更多
Given the flaws in traditional cascading design of the filtering antennas, a kind of filtering antenna based on the defected ground structure （DGS） is proposed. It adopts the method of co-design to integrate the fil...Given the flaws in traditional cascading design of the filtering antennas, a kind of filtering antenna based on the defected ground structure （DGS） is proposed. It adopts the method of co-design to integrate the filter and the antenna into one substrate, resulting in a miniaturized size of 34 mmx30 ram. In the design, the structure with dumbbell shape is etched on the ground of dual-band antenna, aiming for the low-pass property of the filtering antenna. The simulated results show that the filtering antenna＇s co-design can effectively enlarge the bandwidth of the pass-band and suppress the bandwidth of T-patch, whose pass-band can cover the bandwidths of wireless local area network （WLAN） 21~ GHz, wideband code division multiple access （WCDMA） 2.1 GHz, long term evolution （LTE） 2.3/2.5/2.6/2.8 GHz etc. In addition, the filtering antenna＇s physical module is fabricated and measured, whose test results are basically consistent with the ones of simulation. Moreover, the filtering antenna with liner polarization has a good radiation pattern of omni-direcfion, and can be applied to the terminals of wireless mobile system.展开更多
基金supported by the National Natural Science Foundation of China (61301032)
文摘A design of broadband dual-polarized antenna with low cross polarization and high isolation was presented. The antenna is composed of a cross dipole, a folded ground, two feeding networks, and a reflector. The impedance bandwidth was enhanced by utilizing the mutual coupling between the two dipoles. A kind of meandering folded Marchand balun was skillfully integrated on the support column of the antenna to excite the dipole differentially, which can deliver both balanced （within 0.5 dB） power splitting and consistent （±5°） phase shifting from 1.71 GHz to 2.17 GHz. The standing wave ratios （SWRs） of each port are less than 1.5. By using this feeding network, the antenna has good performance in isolation （〉 45 dB） and cross polarization （〉 30 dB） over the entire operating frequency band. Moreover, the gain （-8.6 dB） of the proposed antenna is stable with frequency and the antenna structure is very firm due to the support column. The proposed antenna can be easily formed an array for digital cellular system （DCS）, personal communications service （PCS） and 3rd generation （3G） applications.
基金supported by the National Natural Science Foundation of China (61401054)the Science and Technology Research Project of Chongqing Municipal Education Commission (KJ130512)
文摘Given the flaws in traditional cascading design of the filtering antennas, a kind of filtering antenna based on the defected ground structure （DGS） is proposed. It adopts the method of co-design to integrate the filter and the antenna into one substrate, resulting in a miniaturized size of 34 mmx30 ram. In the design, the structure with dumbbell shape is etched on the ground of dual-band antenna, aiming for the low-pass property of the filtering antenna. The simulated results show that the filtering antenna＇s co-design can effectively enlarge the bandwidth of the pass-band and suppress the bandwidth of T-patch, whose pass-band can cover the bandwidths of wireless local area network （WLAN） 21~ GHz, wideband code division multiple access （WCDMA） 2.1 GHz, long term evolution （LTE） 2.3/2.5/2.6/2.8 GHz etc. In addition, the filtering antenna＇s physical module is fabricated and measured, whose test results are basically consistent with the ones of simulation. Moreover, the filtering antenna with liner polarization has a good radiation pattern of omni-direcfion, and can be applied to the terminals of wireless mobile system.
