Planar antenna device

Claim 2

An antenna device for a portable radio communication device, comprising: a conductive first plate, a conductive second plate parallel to and spaced by a first spacing apart from the first plate on a first side thereof and having a first edge, a conductive first grounding means essentially perpendicular to and interconnecting the first and second plates along a portion of the first edge of the second plate, the first plate provided with a first aperture at a first distance from the first grounding means, a first conductor extending across the first aperture, the first plate and the first conductor providing first and second feed portions, respectively, to be connected to transmitting/receiving circuitry of the radio communication device, and another structure including a third conductive plate and a second grounding means corresponding to the second plate and the first grounding means, respectively, is arranged so as to form, together with a portion of the first conductive plate, a side profile having a general form of the capital letter G.

Claim 3

The antenna device according to claim 1, wherein the first conductor provides the second feed portion at the one side of the first aperture and has on the other side an open end at essentially one quarter of a wavelength.

Claim 4

The antenna device according to claim 1, wherein the first conductor provides the second feed portion at the one side of the first aperture and is connected essentially immediately on the other side to the first plate.

Claim 5

The antenna device according to claim 1, wherein the second plate is provided with a second aperture at a second distance from the first grounding means so as to facilitate excitation of the second plate in two different resonant modes.

Claim 6

The antenna device according to claim 1, wherein the first conductor extends across the first aperture parallel to and spaced apart from the first plate on a second side thereof.

Claim 7

The antenna device according to claim 1, wherein the first conductor extends across the first aperture spaced apart from the first plate on the first side thereof.

Claim 8

The antenna device according to claim 6, wherein the first conductor extends through an opening in the first grounding means, and the first conductor and the first grounding means are electrically insulated from each other.

Claim 9

The antenna device according to claim 6, wherein the first plate is provided with a second aperture at a distance from the first grounding means, a second conductor extends across the second aperture parallel to and spaced apart from the first plate on a second side thereof, the second conductor providing a third feed portion, to be connected to transmitting/receiving circuitry of the radio communication device.

Claim 10

The antenna device according to claim 1, wherein the first conductor is arranged in a same plane as the first plate which has a slot in order to leave a spacing between the first plate and the first conductor, said spacing extending on both sides of the first conductor at least from the second feed portion to the first aperture.

Claim 11

The antenna device according to claim 1, said another structure further including a second aperture corresponding to the first aperture, so as to facilitate operation within two separated frequency bands.

Claim 12

The antenna device according to claim 1, wherein the first conductor includes a transmission line being at least one in a group consisting of a microstrip line, a stripline, and a coplanar wave guide.

Claim 13

The antenna device according to claim 1, wherein the first aperture has essentially a shape of one in a group consisting of a rectangle, a circle, an oval, an ellipse, a bow tie, and an arc.

Claim 14

The antenna device according to claim 1, wherein the first conductor includes a quarter wave transformer and at least one transmission line segment.

Claim 15

The antenna device according to claim 1, wherein the second and third conductive plates are each provided with at least one dividing slot formed by two or more substantially coextending plate portions.

Claim 16

An antenna device for a portable radio communication device, comprising: a conductive first plate, a conductive second plate parallel to and spaced by a first spacing apart from the first plate on a first side thereof, and having a first edge, a conductive grounding means essentially perpendicular to and interconnecting the first and second plates along a portion of the first edge of the second plate, the first plate provided with a first aperture at a first distance from the grounding means, a first conductor extending across the first aperture spaced apart from the first plate on the first side thereof, and the first plate and the first conductor providing first and second feed portions, respectively, to be connected to transmitting/receiving circuitry of the radio communication device.

Claim 17

An antenna device for a portable radio communication device, comprising: a conductive first plate, a conductive second plate parallel to and spaced by a first spacing apart from the first plate on a first side thereof, and having a first edge, a conductive grounding means essentially perpendicular to and interconnecting the first and second plates along a portion of the first edge of the second plate, the first plate provided with a first aperture at a first distance from the grounding means, a first conductor extending across the first aperture spaced apart from the first plate on the first side thereof, and the first plate and the first conductor providing first and second feed portions, respectively, to be connected to transmitting/receiving circuitry of the radio communication device.

Claim 18

The antenna device according to claim 15 wherein the first conductor extends through an opening in the grounding means, the first conductor and the grounding means are electrically insulated from each other.

Claim 19

The antenna device according to claim 15, wherein the first plate is provided with a second aperture at a distance from the grounding means, a second conductor extending across the second aperture parallel to and spaced apart from the first plate on a second side thereof, the second conductor providing a third feed portion, to be connected to transmitting/receiving circuitry of the radio communication device.

Claim 20

The antenna device according to claim 15, wherein the first conductor provides the second feed portion at the one side of the first aperture and has on the other side an open end at essentially one quarter of a wavelength.

Claim 21

The antenna device according to claim 15, wherein the first conductor provides the second feed portion at the one side of the first aperture and is connected essentially immediately on the other side to the first plate.

Claim 22

An antenna device according to claim 15, wherein the second plate is provided with a second aperture at a second distance from the grounding means so as to facilitate excitation of the second plate in two different resonant modes.

Claim 23

The antenna device according to claim 15, wherein the antenna device further comprises a conductive third plate parallel to and spaced apart from the first plate on the first side thereof, the third plate connected to the second plate at the first edge and extending from the first edge in a direction opposite to that of the second plate, the first plate is provided with a second aperture at a second distance from the grounding means at a side thereof opposite to that of the first aperture, the first conductor extending across the second aperture as well as across the first aperture.

Claim 24

The antenna device according to claim 21, wherein the third plate is provided with a third aperture at a third distance from the grounding means so as to facilitate excitation of the third plate in two different resonant modes.

Claim 25

The antenna device according to claim 15, wherein the first conductor includes a transmission line being at least one in a group consisting of a microstrip line, a stripline, and a coplanar wave guide.

Claim 26

The antenna device according to claim 15, wherein the first aperture has essentially a shape of one in a group consisting of a rectangle, a circle, an oval, an ellipse, a bow tie, and an arc.

Claim 27

The antenna device according to claim 15, wherein the first conductor includes a quarter wave transformer and at least one transmission line segment.

Claim 28

The antenna device according to claim 15, wherein the second conductive plate is provided with at least one dividing slot formed by two or more substantially coextending plate portions.

Claim 29

An antenna device for a portable radio communication device, comprising; a conductive first plate, a conductive second plate parallel to and spaced by a first spacing apart from the first plate on a first side thereof and having a first edge, a conductive grounding means essentially perpendicular to the first and second plates and interconnecting the first and second plates along a portion of the first edge of the second plate, the first plate provided with a first aperture at a first distance from the grounding means, a first conductor extending across the first aperture, the first plate and the first conductor providing first and second feed portions, respectively, to be connected to transmitting/receiving circuitry of the radio communication device, and the first conductor providing the second feed portion at a first side of the first aperture and is connected essentially immediately on a second side of the first aperture to the first plate.

Claim 30

An antenna device for a portable radio communication device, comprising; a conductive first plate, a conductive second plate parallel to and spaced by a first spacing apart from the first plate on a first side thereof and having a first edge, a conductive grounding means essentially perpendicular to the first and second plates and interconnecting the first and second plates along a portion of the first edge of the second plate, the first plate provided with a first aperture at a first distance from the grounding means, a first conductor extending across the first aperture, the first plate and the first conductor providing first and second feed portions, respectively, to be connected to transmitting/receiving circuitry of the radio communication device, and the first conductor providing the second feed portion at a first side of the first aperture and is connected essentially immediately on a second side of the first aperture to the first plate.

Claim 31

The antenna device according to claim 27, wherein the second plate is provided with a second aperture at a second distance from the grounding means so as to facilitate excitation of the second plate in two different resonant modes.

Claim 32

The antenna device according to claim 27, wherein the antenna device further comprises a conductive third plate parallel to and spaced apart from the first plate on the first side thereof, the third plate connected to the second plate at the first edge and extends from the first edge in a direction opposite to that of the second plate, the first plate is provided with a second aperture at a second distance from the grounding means at a side thereof opposite to that of the first aperture, the first conductor extending across the second aperture as well as across the first aperture.

Claim 33

The antenna device according to claim 29, wherein the third plate is provided with a third aperture at a third distance from the grounding means so as to facilitate excitation of the third plate in two different resonant modes.

Claim 34

The antenna device according to claim 27, wherein the first conductor includes a transmission line being at least one in a group consisting of a microstrip line, a stripline, and a coplanar wave guide.

Claim 35

The antenna device according to claim 27, wherein the first aperture has essentially a shape of one in a group consisting of a rectangle, a circle, an oval, an ellipse, a bow tie, and an arc.

Claim 36

The antenna device according to claim 27, wherein the first conductor includes a quarter wave transformer and at least one transmission line segment.

Claim 37

The antenna device according to claim 27, wherein the second conductive plate is provided with at least one dividing slot formed by two or more substantially coextending plate portions.

Claim 38

An antenna device for a portable radio communication device, comprising: a conductive first plate, a conductive second plate parallel to and spaced by a first spacing apart from the first plate on a first side thereof and having a first edge, a conductive grounding means essentially perpendicular to and interconnecting the first and second plates along a portion of the first edge of the second plate, the first plate provided with a first aperture at a first distance from the grounding means, a first conductor extending across the first aperture, the first plate and the first conductor providing first and second feed portion, respectively, to be connected to transmitting/receiving circuitry of the radio communication device, and the first conductor arranged in a same plane as a the first plate which has a slot in order to leave a spacing between the first plate and the first conductor, said spacing extending on both sides of the first conductor at least from the second feed portion to the first aperture.

Claim 39

An antenna device for a portable radio communication device, comprising: a conductive first plate, a conductive second plate parallel to and spaced by a first spacing apart from the first plate on a first side thereof and having a first edge, a conductive grounding means essentially perpendicular to and interconnecting the first and second plates along a portion of the first edge of the second plate, the first plate provided with a first aperture at a first distance from the grounding means, a first conductor extending across the first aperture, the first plate and the first conductor providing first and second feed portion, respectively, to be connected to transmitting/receiving circuitry of the radio communication device, and the first conductor arranged in a same plane as a the first plate which has a slot in order to leave a spacing between the first plate and the first conductor, said spacing extending on both sides of the first conductor at least from the second feed portion to the first aperture.

Claim 40

The antenna device according to claim 35, wherein the first conductor provides the second feed portion at a first side of the first aperture and has on a second side an open end at essentially one quarter of a wavelength.

Claim 41

The antenna device according to claim 35, wherein the first conductor provides the second feed portion at a first side of the first aperture and is connected essentially immediately on a second side to the first plate.

Claim 42

The antenna device according to claim 35, wherein the second plate is provided with a second aperture at a second distance from the grounding means so as to facilitate excitation of the second plate in two different resonant modes.

Claim 43

The antenna device according to claim 35, wherein the antenna device further comprises a conductive third plate parallel to and spaced apart from the first plate on the first side thereof, the third plate connected to the second plate at the first edge and extends from the first edge in a direction opposite to that of the second plate, the first plate is provided with a second aperture at a second distance from the grounding means at a side thereof opposite to that of the first aperture, the first conductor extends across the second aperture and across the first aperture.

Claim 44

The antenna device according to claim 39, wherein the third plate is provided with a third aperture at a third distance from the grounding means so as to facilitate excitation of the third plate in two different resonant modes.

Claim 45

The antenna device according to claim 35, wherein the first aperture has essentially a shape of one in a group consisting of a rectangle, a circle, an oval, an ellipse, a bow tie, and an arc.

Claim 46

The antenna device according to claim 35, wherein the first conductor includes a quarter wave transformer and at least one transmission line segment.

Claim 47

The antenna device according to claim 35, wherein the second conductive plate is provided with at least one dividing slot formed by two or more substantially coextending plate portions.

Claim 48

An antenna device for a portable radio communication device, comprising: a conductive first plate, a conductive second plate parallel to and spaced by a first spacing apart from the first plate on a first side thereof and having a first edge, a conductive first grounding means essentially perpendicular to and interconnecting the first and second plates along a portion of the first edge of the second plate, the first plate provided with a first aperture at a first distance from the first grounding means, a first conductor extending across the first aperture, the first plate and the first conductor providing first and second feed portions, respectively, to be connected to transmitting/receiving circuitry of the radio communication device, the conductive first plate is provided with a second grounding means, on the first side of said first plate and opposite to the firsnt grounding means, the first aperture is located between the first grounding means and the second grounding means, a third conductive plate interconnected at a first edge to the conductive first plate via the second grounding means, the second and third conductive plates extending from their respective grounding means towards each other, leaving a spacing between the edges that are facing each other, and a conductive layer arranged between the conductive first, second and third plates.

Claim 49

An antenna device for a portable radio communication device, comprising: a conductive first plate, a conductive second plate parallel to and spaced by a first spacing apart from the first plate on a first side thereof and having a first edge, a conductive first grounding means essentially perpendicular to and interconnecting the first and second plates along a portion of the first edge of the second plate, the first plate provided with a first aperture at a first distance from the first grounding means, a first conductor extending across the first aperture, the first plate and the first conductor providing first and second feed portions, respectively, to be connected to transmitting/receiving circuitry of the radio communication device, the conductive first plate is provided with a second grounding means, on the first side of said first plate and opposite to the firsnt grounding means, the first aperture is located between the first grounding means and the second grounding means, a third conductive plate interconnected at a first edge to the conductive first plate via the second grounding means, the second and third conductive plates extending from their respective grounding means towards each other, leaving a spacing between the edges that are facing each other, and a conductive layer arranged between the conductive first, second and third plates.

Claim 50

The antenna device according to claim 44, wherein the second and third conductive plates are arranged in a same plane and are parallel to the conductive first plate and the conductive layer, the first and second grounding means are arranged parallel to each other at opposed edges of the conductive first plate, the first aperture is parallel to the second grounding means.

Claim 51

The antenna device according to claim 44, wherein the first conductor extends across the first aperture parallel to and spaced apart from the first plate on a second side thereof.

Claim 52

The antenna device according to claim 44, wherein the first conductor extends across the first aperture spaced apart from the first plate on the first side thereof.

Claim 53

The antenna device according to claim 47, wherein the first conductor extends through an opening or aperture in the first grounding means, the first conductor and the first grounding means are electrically insulated from each other.

Claim 54

The antenna device according to claim 44, wherein the first conductor is arranged in a same plane as the first plate which has a slot in order to leave a spacing between the first plate and the first conductor, said spacing extending on both sides of the first conductor at least from the second feed portion to the first aperture.

Claim 55

The antenna device according to claim 44, wherein the first conductor provides the second feed portion at the one side of the first aperture and has on the other side an open end at essentially one quarter of a wavelength.

Claim 56

The antenna device according to claim 44, wherein the first conductor provides the second feed portion at the one side of the first aperture and is connected essentially immediately on the other side to the first plate.

Claim 57

The antenna device according to claim 44, wherein the first conductor includes a transmission line being at least one in a group consisting of a microstrip line, a stripline, and a coplanar wave guide.

Claim 58

The antenna device according to claim 44, wherein the first aperture has essentially a shape of one in a group consisting of a rectangle, a circle, an oval, an ellipse, a bow tie, and an arc.

Claim 59

The antenna device according to claim 44, wherein the first conductor includes a quarter wave transformer and at least one transmission line.

Claim 60

The antenna device according to claim 44, wherein the second and third conductive plates are each provided with at least one dividing slot formed by two or more substantially coextending plate portions.