EMBEDDED CHIP ANTENNA HAVING COMPLEMENTARY RADIATOR STRUCTURE

Abstract

Disclosed herein is an embedded chip antenna. The embedded chip antenna having a complementary radiator structure includes two radiators that have identical radiation characteristics and are respectively arranged on both sides of a feed point. According to the present invention, the radiator of a chip antenna has a single physical radiator structure, but is electrically formed of a plurality of partial radiators symmetrical with respect to a feed point, and radiation operations in high and low frequency bands are separately performed. Therefore, complementary operational characteristics that counteract external effects are implemented, so that, when part of a human body, such as the hand, affects one partial radiator on one side of the chip antenna, the other partial radiator on the other side thereof independently operates, thereby minimizing performance degradation originating from the outside of the antenna.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is an exploded perspective view of an embedded chip antenna according to a first embodiment of the present invention;

FIG. 2 is a perspective assembled view illustrating the embedded chip antenna of FIG. 1;

FIG. 3 is a perspective assembled view of an embedded chip antenna according to a second embodiment of the present invention;

FIG. 4 is a perspective view illustrating an example of the installation of the embedded chip antenna of FIG. 2;

FIG. 5 is a perspective assembled view of an embedded chip antenna according to a third embodiment of the present invention;

FIG. 6 is a perspective assembled view of an embedded chip antenna according to a fourth embodiment of the present invention;

FIG. 7 is a graph showing the standing-wave ratio of an embedded chip antenna according to an embodiment of the present invention; and

FIG. 8 is a graph showing standing-wave ratios in the case in which one end of the embedded chip antenna installed as in FIG. 4 is gripped by the hand.

Claims

1. An embedded chip antenna having a complementary radiator structure, comprising two radiators that have identical radiation characteristics and are respectively arranged on both sides of a feed point.

2. The embedded chip antenna as set forth in claim 1, wherein each of the radiators has a shape of a cylinder having a longitudinal through hole, and a dielectric having a relative high dielectric constant is inserted into the through hole.

3. The embedded chip antenna as set forth in claim 1, wherein each of the radiators comprises: a first radiation part for performing radiation in a high frequency band; anda second radiation part of performing radiation in a low frequency band.

4. The embedded chip antenna as set forth in claim 3, wherein the second radiation part comprises the first radiation part and an extended radiation part extended from the first radiation part.

5. The embedded chip antenna as set forth in claim 3, wherein each of the radiators has a shape of a cylinder having a longitudinal through hole, and a dielectric having a high relative dielectric constant is inserted into the through hole.

6. The embedded chip antenna as set forth in claim 5, wherein each of the extended radiation part and the second radiation part has a helical structure or a meander line structure.

7. The embedded chip antenna as set forth in claim 5, wherein the relative dielectric constant of the dielectric is within a range of 7˜13.

8. The embedded chip antenna as set forth in claim 5, wherein an electrical length of the first radiation part is a reference wavelength (λh) within a range of 0.03˜0.05 in a high frequency band, which is measured from the feed point.

9. The embedded chip antenna as set forth in claim 5, wherein an electrical length of the second radiation part is a reference wavelength (λ1) within a range of 0.4˜0.6 in a low frequency band, which is measured from the feed point.

10. An embedded chip antenna having a complementary radiator structure, comprising a first radiator, having a first resonant frequency, and a second radiator, having resonant characteristics identical to those of the first radiator, due to change in resonant characteristics thereof for an external reason, such as an effect of a hand, the first and second radiators being respectively arranged on both sides of a feed point.