Antenna construction including a ground plane and radiator
First Claim
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1. An antenna construction having a ground plane and a radiator, and having at least one resonance frequency comprising:
- at least one matching element at the open end of the antenna construction, said matching element being in a galvanic connection with the radiator such that the capacitive coupling between the matching element and ground plane at the at least one resonance frequency is stronger than the capacitive coupling between the radiator and ground plane.
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Abstract
An antenna construction according to the invention has a radiator, ground plane and at least one matching element. The matching element is capacitively coupled to a ground potential. By varying the number, location and strength of the capacitive coupling of the matching elements the characteristics of the antenna construction, such as the number of resonance frequencies, resonance frequencies and radiator impedance at the feed point can be controlled in a versatile manner.
99 Citations
12 Claims
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1. An antenna construction having a ground plane and a radiator, and having at least one resonance frequency comprising:
at least one matching element at the open end of the antenna construction, said matching element being in a galvanic connection with the radiator such that the capacitive coupling between the matching element and ground plane at the at least one resonance frequency is stronger than the capacitive coupling between the radiator and ground plane. - View Dependent Claims (2, 3, 4, 5)
- 6. A mobile communications device which has an antenna construction comprising at least a ground plane and radiator comprising in the antenna construction of the mobile communications device at least one matching element at the open end of the antenna construction, the matching element being in a galvanic connection with the radiator such that the capacitive coupling between the matching element and ground plane at said at least one resonance frequency is stronger than the capacitive coupling between the radiator and ground plane.
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8. An antenna construction having a ground plane and a radiator, and having at least one resonance frequency comprising:
at least one matching element in galvanic connection with the radiator such that the capacitive coupling between the matching element and ground plane at the at least one resonance frequency is stronger than the capacitive coupling between the radiator and ground plane, further comprising a separate conductive patch wherein at least one matching element includes a matching element that is capacitively coupled to said separate conductive patch. - View Dependent Claims (9, 10, 11)
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12. A mobile communications device which has an antenna construction including at least a ground plane and radiator comprising in the antenna construction of the mobile communications device at least one matching element in galvanic connection with the radiator such that the capacitive coupling between the matching element and ground plane at the at least one resonance frequency is stronger than the capacitive coupling between the radiator and ground plane further comprising in the antenna construction of the mobile communications device,
a conductive patch, and a capacitive element for connecting the conductive path to the ground plane, wherein at least one matching element includes matching elements that are capacitively coupled to the conductive patch.
Specification