ANTENNA AND RADIO COMMUNICATION APPARATUS

• US 20100289707A1
• Filed: 05/13/2010
• Published: 11/18/2010
• Est. Priority Date: 05/14/2009
• Status: Abandoned Application

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: TAKAMURA, Ayumi
• Application Number:
  US12/779,748
• Publication Number:
  US 20100289707A1
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in 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 9/30 with feed to end of elongated active element, e.g. unipole H01Q9/44 takes precedence

Abstract

A ground electrode is formed on upper and lower surfaces of a substrate. Along a part of one side of the substrate, a non-ground area is formed on the upper and lower surfaces of the substrate. In the non-ground area on the upper surface of the substrate, a substrate-side radiation electrode is formed along an edge of the substrate. An earth terminal at one end of the substrate-side radiation electrode is electrically connected to the ground electrode or is grounded. A dielectric-block-side radiation electrode and a capacitance forming electrode are formed on a dielectric block. There is a capacitive coupling portion in an inter-electrode gap between an end of the dielectric-block-side radiation electrode and an end of the capacitance forming electrode. A capacitor is connected in series in the middle of the substrate-side radiation electrode.

Claims

1. An antenna comprising:

a radiation electrode having a first end, a second end and a capacitive coupling portion at the first end, the radiation electrode being grounded at the second end;

a dielectric block on which the capacitive coupling portion is disposed;

a substrate having the second end of the radiation electrode thereon, the substrate having the dielectric block mounted thereon; and

a capacitor inserted in series with the radiation electrode on the substrate.

2. The antenna according to claim 1, further comprising a feed electrode electrically connected to the capacitive coupling portion, disposed on the substrate, and grounded at one end.

3. The antenna according to claim 2, wherein the capacitor is disposed between the second end of the radiation electrode and the center of the radiation electrode.

4. The antenna according to claim 3, wherein a capacitance value of the capacitor is about 0.5 to 3.0 times a capacitance value at the capacitive coupling portion.

5. The antenna according to claim 2, wherein a capacitance value of the capacitor is about 0.5 to 3.0 times a capacitance value at the capacitive coupling portion.

6. The antenna according to claim 1, wherein the capacitor is disposed between the second end of the radiation electrode and the center of the radiation electrode.

7. The antenna according to claim 6, wherein a capacitance value of the capacitor is about 0.5 to 3.0 times a capacitance value at the capacitive coupling portion.

8. The antenna according to claim 1, wherein a capacitance value of the capacitor is about 0.5 to 3.0 times a capacitance value at the capacitive coupling portion.

9. A radio communication apparatus comprising:

an antenna; and

a housing having the antenna therein, wherein the antenna includes;

a radiation electrode having a first end, a second end and a capacitive coupling portion at the first end, the radiation electrode being grounded at the second end;

a dielectric block on which the capacitive coupling portion is disposed;

a substrate having the second end of the radiation electrode thereon, the substrate having the dielectric block mounted thereon; and

a capacitor inserted in series with the radiation electrode on the substrate.

10. The radio communication apparatus according to claim 9, further comprising a feed electrode electrically connected to the capacitive coupling portion, disposed on the substrate, and grounded at one end.

11. The radio communication apparatus according to claim 10, wherein the capacitor is disposed between the second end of the radiation electrode and the center of the radiation electrode.

12. The radio communication apparatus according to claim 11, wherein a capacitance value of the capacitor is about 0.5 to 3.0 times a capacitance value at the capacitive coupling portion.

13. The radio communication apparatus according to claim 10, wherein a capacitance value of the capacitor is about 0.5 to 3.0 times a capacitance value at the capacitive coupling portion.

14. The radio communication apparatus according to claim 9, wherein the capacitor is disposed between the second end of the radiation electrode and the center of the radiation electrode.

15. The radio communication apparatus according to claim 14, wherein a capacitance value of the capacitor is about 0.5 to 3.0 times a capacitance value at the capacitive coupling portion.

16. The radio communication apparatus according to claim 9, wherein a capacitance value of the capacitor is about 0.5 to 3.0 times a capacitance value at the capacitive coupling portion.