Dual-band strip antenna supporting left-hand and right-hand circular polarization

• US 20060232475A1
• Filed: 04/15/2005
• Published: 10/19/2006
• Est. Priority Date: 04/15/2005
• Status: Abandoned Application

• Current Assignee: Cirex Technology Corporation
• Original Assignee: Cirex Technology Corporation
• Inventors: Huang, Yuh-Hui, Fang, Ching-Shu
• Application Number:
  US11/106,494
• Publication Number:
  US 20060232475A1
• Time in Patent Office: Days
• US Class Current: 343/700.MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 5/378 Combination of fed elements with parasitic elements
• CPC Class Codes: H01Q 9/0414 in a stacked or folded configuration
• CPC Class Codes: H01Q 9/0428 radiating a circular polarised wave

Abstract

A dual-band strip antenna supporting left-hand circular polarization and right-hand circular polarization includes at least a first base and a second base stacked to each other, an antenna conductor coated between the two bases, and a feeder connected to the antenna conductor through indirect capacitor coupling. The antenna conductor includes a bottom metal layer coated on the bottom of the first base through pattern defining and functioned as a bottom ground conductor; a second metal layer coated on a surface of the first base through pattern defining, the second metal layer functioned as low-frequency band antenna and a bottom ground electrode of the second base; a top metal layer coated on a surface of the second base through pattern defining, the top metal layer functioned as high-frequency band antenna. The dual-band strip antenna of the present invention overcomes the problem of necessity of switch, low efficient and high cost.

Claims

1-11. -11. (canceled)

12. A dual-band strip antenna used for satellite terminal, comprising:

a first panel base and a second panel base stacked thereon; and

an antenna conductor coated between surfaces of the first panel base and the second panel base, including;

a bottom metal layer individually coated at center of a bottom surface of the first panel base and functioned as a bottom ground conductor of the first panel base;

an intermediate metal layer as a right-hand circular polarization metal plate, individually coated at center of a top surface of the first panel base and functioned as low-frequency band antenna and a bottom ground electrode of the second panel base;

a top metal layer as a left-hand circular polarization metal plate, individually coated on at center of a top surface of the second panel base and functioned as high-frequency band antenna; and

a feeder feeding to the antenna conductor by connecting merely to the top metal layer.

13. The dual-band strip antenna as in claim 12, wherein the feeder is a feeding terminal or an indirectly coupling capacitor.

16. The dual-band strip antenna as in claim 12, wherein the metal layers have high Q value and anti-oxidation property.