Distributed phase type circular polarized wave antenna and high-frequency module using the same

• US 20060197706A1
• Filed: 02/14/2006
• Published: 09/07/2006
• Est. Priority Date: 02/14/2005
• Status: Active Grant

• Current Assignee: Hitachi Cable Limited (Proterial Ltd.)
• Original Assignee: Hitachi Cable Limited (Proterial Ltd.)
• Inventors: Ogawa, Tomoyuki, Takei, Ken
• Granted Patent: US 7,663,550 B2
• Time in Patent Office: Days
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence
• CPC Class Codes: H01Q 9/28 Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines waveguide horns or mouths H01Q13/00; slot antennas H01Q13/00

Abstract

A distributed phase type circular polarized wave antenna is composed of a group of narrow conductor lines 2a, 2b, 2c and 2d, and the group of the narrow conductor lines 2a, 2b, 2c and 2d are laid out in a two-dimensional plane. Complex vectorial sums of respective projections of current induced in each point of the narrow conductor lines 2a, 2b, 2c and 2d in two directions orthogonal to each other in the two-dimensional plane are determined, such that amplitudes of the complex vectorial sums are equal to each other in the two directions and a phase difference between the complex vectorial sums in the two directions is 90°.

Claims

1. A distributed phase type circular polarized wave antenna, comprising:

a plane;

a power feed point formed on the plane; and

a plurality of narrow conductors having a substantially one-dimensional current distribution, the narrow conductor groups being distributed in two dimension on the plane;

wherein;

absolute values of sums of projections of complex vectors of current distributions induced on the narrow conductors in first and second directions orthogonal to each other defined on the plane are determined in amplitude and phase, such that an amplitude ratio of the absolute values is from 0.7 to 1.3 and a phase difference of the absolute values is from 80°

to 100°

.

2. The distributed phase type circular polarized wave antenna, according to claim 1, wherein:

the narrow conductors are coupled to each other and the power feed point is included in the narrow conductors.

3. The distributed phase type circular polarized wave antenna, according to claim 1, wherein:

the narrow conductors are formed on a grounded conductor plate having a finite grounding potential.

4. The distributed phase type circular polarized wave antenna, according to claim 3, wherein:

a space between the narrow conductors and the conductor plate is filled with a dielectric material.

5. The distributed phase type circular polarized wave antenna, according to claim 3, wherein:

a space between the narrow conductors and the conductor plate is filled with a dielectric material.

6. The distributed phase type circular polarized wave antenna, according to claim 2, further comprising:

a thin dielectric sheet laminating the narrow conductors.

7. The distributed phase type circular polarized wave antenna, according to claim 2, further comprising:

a coaxial cable having an end coupled to the power feed point and another end being a power feed point for connection to outside.

8. The distributed phase type circular polarized wave antenna, according to claim 2, further comprising:

a flexible printed cable having an end coupled to the power feed point and another end being a power feed point for connection to outside.

9. The distributed phase type circular polarized wave antenna, according to claim 4, further comprising:

a layered conductor comprising dielectric layers formed on a surface of the grounded conductor plate; and

a conductor formed in the dielectric material, the conductor being connected to the power feed point and coupled to the layered conductor.

10. The distributed phase type circular polarized wave antenna, according to claim 4, further comprising:

a layered conductor comprising dielectric layers formed on a surface of the grounded conductor plate; and

a conductor formed on a side surface of the dielectric material, the conductor being connected to the power feed point and coupled to the layered conductor.

11. The distributed phase type circular polarized wave antenna, according to claim 5, further comprising:

a layered conductor comprising dielectric layers formed on a surface of the grounded conductor plate; and

a conductor formed in the magnetic material, the conductor being connected to the power feed point and coupled to the layered conductor.

12. The distributed phase type circular polarized wave antenna, according to claim 5, further comprising:

a layered conductor comprising dielectric layers formed on a surface of the grounded conductor plate; and

a conductor formed on a side surface of the magnetic material, the conductor being connected to the power feed point and coupled to the layered conductor.

13. A distributed phase type circular polarized wave antenna, comprising:

a convex curved surface;

a power feed point formed on the convex curved surface; and

a plurality of narrow conductors having a substantially one-dimensional current distribution, the narrow conductor groups being distributed in two dimension on the convex curved surface;

wherein;

absolute values of sums of projections, on a plane contacting the convex curved surface, of complex vector additional values of respective current distributions induced on the narrow conductors in first and second directions orthogonal to each other defined on the convex curved surface are determined in amplitude and phase, such that an amplitude ratio of the absolute values is from 0.7 to 1.3 and a phase difference of the absolute values is from 80°

to 100°

.

14. A high-frequency module, comprising:

a distributed phase type circular polarized wave antenna which comprises;

a plane;

a power feed point formed on the plane; and

a plurality of narrow conductors having a substantially one-dimensional current distribution, the narrow conductor groups being distributed in two dimension on the plane;

wherein;

absolute values of sums of projections of complex vectors of current distributions induced on the narrow conductors in first and second directions orthogonal to each other defined on the plane are determined in amplitude and phase, such that an amplitude ratio of the absolute values is from 0.7 to 1.3 and a phase difference of the absolute values is from 80°

to 100°

.

15. A portable radio terminal, comprising:

a distributed phase type circular polarized wave antenna which comprises;

a plane;

a power feed point formed on the plane; and

a plurality of narrow conductors having a substantially one-dimensional current distribution, the narrow conductor groups being distributed in two dimension on the plane;

wherein;

absolute values of sums of protections of complex vectors of current distributions induced on the narrow conductors in first and second directions orthogonal to each other defined on the plane are determined in amplitude and phase, such that an amplitude ratio of the absolute values is from 0.7 to 1.3 and a phase difference of the absolute values is from 80°

to 100°

.

16. A portable radio terminal, according to claim 15, wherein:

a high-frequency module includes the distributed phase type circular polarized wave antenna.