Antenna apparatus
An antenna apparatus is disclosed. The antenna apparatus is structured by a ground plate that is shaped like a plate, and a feeding unit that is formed by a plate-like member, the feeding unit extending from the ground plate generally perpendicular to the ground plate at a predetermined angle to the ground plate for a predetermined length.
1. An antenna apparatus, comprising:
a ground plate that is disposed on a printed wiring board;
a feeding unit that extends from the ground plate at a predetermined angle in reference to the ground plate for a predetermined length, in a direction that perpendicularly intersects the ground plate; and
a radio frequency circuit unit disposed on the printed wiring board and connected to the feeding unit by a microstrip line;
wherein the feeding unit is shaped like a semicircle plate extending from one end of the ground plate in the direction that perpendicularly intersects the ground plate for the predetermined length and a top part of a curved surface of the feeding unit is connected to the microstrip line,
wherein the ground plate is formed by electrically conductive patterns disposed along and at both sides of the microstrip line, and
wherein the feeding unit is capable of rotational movement about at least two axes, a first axis being parallel to the ground plate and a second axis being perpendicular to the ground plate.
2. The antenna apparatus as claimed in claim 1 , wherein the feeding unit is arranged not perpendicular to the ground plate.
3. The antenna apparatus as claimed in claim 1 , wherein the feeding unit is a plate like member, and is attached to the ground plate.
4. The antenna apparatus as claimed in claim 1 , wherein the printed wiring board is made from a high dielectric material.
5. The antenna apparatus as claimed in claim 1 , wherein the ground plate and the feeding unit are constituted by a pattern for the ground plate and a pattern for the feeding unit, respectively, formed on a flexible printed wiring board, a portion occupied by the pattern for the feeding unit being bent in reference to a portion occupied by the pattern for the ground plate such that the feeling unit extends for the predetermined length in the direction that perpendicularly intersects the ground plate.
6. An antenna apparatus, comprising:
a ground plate disposed on a printed wiring board;
a feeding unit that extends from the ground plate;
a radio frequency circuit unit disposed on the printed wiring board; and
a microstrip line connecting the radio frequency circuit unit to the feeding unit;
wherein the ground plate is formed by electrically conductive patterns disposed along and at both sides of the microstrip line, and
wherein the feeding unit is capable of rotational movement about at least two axes, a first axis being parallel to the ground plate and a second axis being perpendicular to the ground plate.
7. An antenna apparatus, comprising:
a ground plate disposed on a printed wiring board;
a feeding unit that extends from the ground plate; and
a radio frequency circuit unit disposed on the printed wiring board and connected to the feeding unit by a microstrip line,
wherein the feeding unit is capable of rotational movement about at least two axes, a first axis being parallel to the ground pirate and a second axis being perpendicular to the ground plate.