Compact circular polarization antenna system with reduced cross-polarization component

摘要

A compact GNSS antenna system reduces directional diagram level in the rear hemisphere primarily for LHCP component. It can be used for reducing multipath reception. A dual-band antenna system for receiving radio signals includes an active Microstrip Patch (MP) High Frequency (HF) circularly-polarized radiator disposed directly on a radiating patch of an active MP low-frequency (LF) radiator. The radiating patch of the active MP LF radiator serves as a ground plane of the MP HF radiator. A loop HF radiator is coaxially arranged around the ground plane of the MP HF radiator. A passive LF radiator is under the ground plane of the active MP LF radiator. A loop LF radiator is axially located around the ground plane of the active MP LF radiator. The loop HF radiator and the loop LF radiator are each excited by a transmission line and a power circuit to generate RHCP waves.

主权项

1. A dual-band antenna system for receiving radio signals comprising:
an active Microstrip Patch (MP) High Frequency (HF) circularly-polarized radiator disposed directly on a radiating patch of an active MP low-frequency (LF) radiator and receiving radio signals at a first frequency, wherein the radiating patch of the active MP LF radiator serves as a ground plane of the MP HF radiator and receives radio signals at a first frequency; a loop HF radiator that is coaxially arranged around the ground plane of the MP HF radiator; and a passive LF radiator under the ground plane of the active MP LF radiator.