ANTENNA OF INVERTED F ANTENNA TYPE INTEGRATED INTO A PRINTED CARD, AND SYSTEM
An IFA type antenna is integrated into a printed card, the printed card having a main-extension plane. The IFA type antenna has a first electrically conducting element, serving as earth plane, a second electrically conducting element, serving as radiating element of the antenna, an electrically conducting connection, serving to short-circuit the first electrically conducting element and the second electrically conducting element, and an excitation element being in electrical contact with the second electrically conducting element. The second electrically conducting element has a first part, a second part and a third part in various planes of the printed card.
1 . An IFA type antenna being integrated into a printed card, the printed card having a main extension plane, the IFA type antenna comprising:
a first electrically conducting element, serving as a ground plane;
a second electrically conducting element, serving as a radiating element of the antenna;
an electrically conducting connection, serving to short-circuit the first electrically conducting element and the second electrically conducting element; and
an excitation element being in electrical contact with the second electrically conducting element,
wherein the second electrically conducting element comprises a first part, a second part and a third part,
the first part of the second electrically conducting element being positioned in a first plane parallel to the main extension plane of the printed card,
the second part of the second electrically conducting element being positioned in a second plane parallel to the main extension plane of the printed card,
the third part of the second electrically conducting element being positioned in a third plane parallel to the main extension plane of the printed card,
the first plane and the second plane being separated and the first and second part of the second electrically conducting element being connected by a fourth part of the second electrically conducting element, the first plane and the third plane being separated and the first and third part of the second electrically conducting element being connected by a fifth part of the second electrically conducting element.
2 . The IFA type antenna as claimed in claim 1 , wherein the second plane and the third plane are identical.
3 . The IFA type antenna as claimed in claim 1 wherein the first part of the second electrically conducting element is positioned on a first side of the printed card, and the second part of the second electrically conducting element and/or the third part of the second electrically conducting element is positioned or are positioned on a second side of the printed card, the second side being opposite to the first side of the printed card.
4 . The IFA type antenna as claimed in claim 3 , wherein
the first electrically conducting element,
the electrically conducting connection, and/or
the excitation element
is positioned or are positioned on the first side of the printed card or on the second side of the printed card.
5 . The IFA type antenna as claimed in claim 1 wherein the printed card comprises a first opening for the fourth part of the second electrically conducting element and/or the printed card comprises a second opening for the fifth part of the second electrically conducting element.
6 . The IFA type antenna as claimed in claim 1 wherein
the first part of the second electrically conducting element has a first length of extension,
the second part of the second electrically conducting element has a second length of extension,
the third part of the second electrically conducting element has a third length of extension,
the fourth part of the second electrically conducting element has a fourth length of extension,
the fifth part of the second electrically conducting element has a fifth length of extension,
the total length of the second electrically conductive element—typically corresponding to a quarter of the main operating wavelength of the IFA type antenna—corresponds to the sum of the first length, the second length, the third length, the fourth length and the fifth length.
7 . The IFA type antenna as claimed in claim 1 wherein a capacitor is provided between the first electrically conducting element and the second part of the second electrically conducting element.
8 . The IFA type antenna as claimed in claim 6 wherein the fourth and fifth length corresponds to a fortieth of the main operating wavelength of the IFA type antenna.
9 . The IFA type antenna as claimed in claim 6 wherein the second and third length corresponds to a twelfth of the main operating wavelength of the IFA type antenna.
10 . The IFA type antenna as claimed in claim 6 wherein the first length corresponds to a tenth of the main operating wavelength of the IFA type antenna.
11 . A system for use in a motor vehicle, comprising an IFA type antenna, the IFA type antenna being integrated into a printed card, the printed card having a main extension plane, the IFA type antenna comprising:
a first electrically conducting element, serving as a ground plane;
a second electrically conducting element, serving as a radiating element of the antenna;
an electrically conducting connection, serving to short-circuit the first electrically conducting element and the second electrically conducting element; and
an excitation element being in electrical contact with the second electrically conducting element,
wherein the second electrically conducting element comprises a first part, a second part and a third part,
the first part of the second electrically conducting element being positioned in a first plane parallel to the main extension plane of the printed card,
the second part of the second electrically conducting element being positioned in a second plane parallel to the main extension plane of the printed card,
the third part of the second electrically conducting element being positioned in a third plane parallel to the main extension plane of the printed card,
the first plane and the second plane being separated and the first and second part of the second electrically conducting element being connected by a fourth part of the second electrically conducting element, the first plane and the third plane being separated and the first and third part of the second electrically conducting element being connected by a fifth part of the second electrically conducting element.