Antenna structure and radio communication apparatus including the same

Abstract

An antenna structure (1) comprising a dielectric base (6) arranged in a non-ground region (Zp) of a substrate (3), and a feeding radiation electrode (7) provided on the dielectric base (6) wherein the outward side face along the edge on one side of the substrate (3) in the dielectric base (6) becomes the side face (6a) on the top side, and a feeding electrode (10) is provided along the side face of the dielectric base (6) in the non-ground region (Zp) of the substrate (3) or on the outside of the substrate (3). One end side of the feeding radiation electrode (7) becomes the feeding end Q side connected with the feeding electrode (10), and the other end side of the feeding radiation electrode (7) becomes the open end K. In the feeding radiation electrode (7), a current path from the feeding end Q side to the open end K has a loop mode extending at least from the top side side face (6a) to the upper surface (6b) of the dielectric base (6). The feeding radiation electrode portion formed on the top side side face (6b) of the dielectric base (6) forms a capacitance for enhancing antenna characteristics in conjunction with the feeding electrode (10).

Description

technical field [0001] The present invention relates to an antenna structure provided in a wireless communication device such as a cellular phone, and a wireless communication device equipped therewith. Background technique [0002] An example of an antenna structure is shown in a schematic perspective view in FIG. 11a. The antenna configuration is shown in a schematic exploded state in FIG. 11 b. In Fig. 11c, a state in which the antenna configuration is viewed from the bottom side is shown. This antenna structure 1 has an antenna 2 mounted on a non-ground region Zp of a circuit board. That is, on the circuit board 3 , the ground region Zg where the ground 4 is formed and the ground region Zp where the ground 4 is not formed are adjacently arranged with the non-ground region Zp as one end side of the circuit board 3 . The antenna 2 is mounted on the non-ground area Zp of the circuit board 3 . In addition, as the substrate of the non-ground area, a glass epoxy substrate ...

AI Technical Summary

Problems solved by technology

As a result, there are problems that the Q value of the antenna characteristics becomes high, the frequency band for wireless communication becomes narrow, and there are problems that the conduction loss or dielectric loss increases and the antenna characteristics deteriorate.

In this case, the radio waves emitted from the energized radiating electrode 7 or the non-energized radiating electrode 8 are hindered by the metal or the high dielectric, so there is a problem that the gain of the antenna is degraded.

In addition, there is a problem that the impedance of the energized radiating electrode 7 or the non-energized radiating electrode 8 changes due to the far-near displacement of an object regarded as the ground, thereby deteriorating the antenna characteristics.

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