Chapter 5

Multimode and Advanced Terminal Antennas

This chapter introduces multimode antennas for an integrated GNSS receiver, covering the GPS, GLONASS, Compass and Galileo systems. It presents several kinds of multimode GNSS antennas, including microstrip and helix antennas. For each one, some practical and novel designs are presented, such as multi-layer microstrip antennas, slotted-patch antennas, quadrifilar helix antennas, and so on. Finally, the chapter touches on high-precision terminal antennas for differential GPS, including phase centre determination and stability.