关键词: 贴片天线, 双频圆极化天线, 精确导航终端天线, 双频宽带, 小型化

Abstract: A novel patch antenna with a slotted surface and a radiation frame is presented. HFSS software simulation results show that both the impedance bandwidth and the axial ratio bandwidth are significantly increased compared with the normal sole patch antenna, and higher gain together with better dual-band characteristics can be obtained as well. Its dual bandwidth is able to cover frequency band L1 and L2 of four satellite systems including GPS/GLONASS/GALILEO/Compass. Therefore, in place of the dual patch antenna, it is particularly suitable for the use of handheld high precision navigation terminals. Furthermore, this novel patch antenna has the advantages of wider bandwidth, smaller size and lower cross-section over other dual-band circularly polarized patch antennas, which leads to a promising prospect.

Key words: patch antenna, dual-band circularly polarized antenna, precision navigation terminal antenna, dual bandwidth, miniaturization