Compact multipath-resistant antenna system with integrated navigation receiver

摘要

A patch antenna system with improved multipath resistance includes a top antenna assembly and a bottom antenna assembly. Each antenna assembly includes a radiator patch and a ground plane separated by a dielectric medium. The radiator patch on the top antenna assembly is excited by an exciter and an excitation circuit. The bottom antenna assembly is electromagnetically coupled to the top antenna assembly. The resonant frequency of the bottom antenna assembly is approximately equal to the resonant frequency of the top antenna assembly. Electromagnetic fields induced in the bottom antenna assembly are in opposite phase to the electromagnetic fields excited in the top antenna assembly. Amplitudes of electromagnetic fields induced in the bottom antenna assembly are subtracted from amplitudes of electromagnetic fields excited in the top antenna assembly, and multipath signals are suppressed. Single band and dual band antenna systems suitable for global navigation satellite systems can be implemented.

主权项

1. A patch antenna system comprising:
a first antenna assembly comprising:
a first ground plane having a first perimeter, a first surface, and a second surface, wherein the second surface is opposite the first surface;a first radiator patch having a second perimeter, wherein the first radiator patch is spaced apart from the first surface;a first dielectric medium disposed between the first radiator patch and the first surface; andan exciter configured to excite first electromagnetic signals in the first radiator patch; a second antenna assembly electromagnetically coupled to the first antenna assembly, the second antenna assembly comprising:
a second ground plane having a third perimeter, a third surface, and a fourth surface, wherein:
the fourth surface is opposite the third surface;the third surface is adjacent to the second surface;the first ground plane is disposed between the second ground plane and the first dielectric medium; andthe second ground plane is electrically connected to the first ground plane;a second radiator patch having a third fourth perimeter, wherein:
the second radiator patch is spaced apart from the fourth surface;the second ground plane is disposed between the first ground plane and the second radiator patch; andthe second radiator patch is configured to excite second electromagnetic signals in response to third electromagnetic signals induced by the first electromagnetic signals;a second dielectric medium disposed between the second radiator patch and the fourth surface; and a signal port electrically connected to the first radiator patch and electromagnetically coupled to the second radiator patch.