Novel Quadrifilar Helix Antenna Combining GNSS, Iridium, and a UHF Communications Monopole.

摘要

A GPS/GNSS/Iridium antenna co-located with a UHF communications monopole on a handset was developed to provide integrated communications and navigation capability. The GPS/GNSS/Iridium antenna is a folded Quadrifilar Helix Antenna (QHA) with novel features to improve frequency coverage compared to existing QHA designs. The GNSS frequencies covered include modernized GPS (L1, L2, L5), GLONASS, Galileo, and Beidou (Compass), spanning from 1164 to 1300 MHz and 1559 to 1611 MHz. The Iridium communications band (1611-1626 MHz) is also covered. This antenna can be co-located concentrically (co-axially) around a 225-400 MHz UHF monopole. Two QHA models were built and tested co- located with the UHF monopole on a handset box.