Spiral cylindrical ceramic circular polarized antenna

• US 20060038739A1
• Filed: 08/21/2004
• Published: 02/23/2006
• Est. Priority Date: 08/21/2004
• Status: Abandoned Application

• Current Assignee: Hsin-Ho Ko, I-Peng Feng
• Original Assignee: Hsin-Ho Ko, I-Peng Feng
• Inventors: Feng, I-Peng, Ko, Hsin-Ho
• Application Number:
  US10/923,907
• Publication Number:
  US 20060038739A1
• Time in Patent Office: Days
• US Class Current: 343/895
• CPC Class Codes: H01Q 1/362 for broadside radiating helical antennas
• 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 11/08 Helical antennas

Abstract

A spiral cylindrical ceramic circular polarized antenna, wherein a cylindrical ceramic body is made of microwave ceramic material with the dielectric constant equal to or greater than 20, and spiral radiation metallic electrodes are printed on the ceramic body to cause 90 degrees of phase difference between the neighboring spiral radiation metallic electrodes. A BALUN and transformer component, PCB, or ceramic ground plane is configured on the bottom tie-plate of the ceramic body to transfer the feed signal from unbalanced signal to balanced signal and to offer a matching impedance. With this design, two mutually perpendicular electromagnetic fields are formed to create CPW (Circular Polarized Wave), in order to facilitate the reception of GPS satellite signal.

Claims

1. A spiral cylindrical ceramic circular polarized antenna, including:

a ceramic body made of microwave dielectric material with the dielectric constant equal to or greater than 20;

a metallic ring printed on the cylindrical surface of the ceramic body, with its length difference on the ceramic body forming circular polarized with the different of their lengths is about λ

/4 at operating frequency;

a ceramic ground plane, into which a BALUN and transformer component or circuitry is embedded, for transferring unbalanced signal to balanced signal and providing impedance matching; and

on which a vertical hole is drilled through with a through-hole technique to connect two terminals of the circuitry, and connect to the circuitry of the cylindrical ceramic body to touch with the metallic ring.

2. The spiral cylindrical ceramic circular polarized antenna according to claim 1, wherein the ceramic ground plane can also be vertically inserted into the ceramic body.

3. The spiral cylindrical ceramic circular polarized antenna according to claim 1, wherein the phase difference between the neighboring spiral radiation metallic electrodes is 90 degrees.

4. The spiral cylindrical ceramic circular polarized antenna according to claim 1, wherein the length of the neighboring spiral radiation metallic electrodes is less than that of the other two radiation metallic electrodes.

5. The spiral cylindrical ceramic circular polarized antenna according to claim 1, wherein the dielectric constant of the ceramic ground plane is greater than 5.

6. The spiral cylindrical ceramic circular polarized antenna according to claim 1, wherein PCB can be used to replace the ceramic ground plane.