Antenna with variable directional pattern
First Claim
1. An antenna of a radio apparatus with a directional pattern that can be shaped comprising:
- a radiating element;
a feed conductor of the radiating element connected to the radio apparatus at a feed point; and
at least one conductive element internal to the radio apparatus and connected only to signal ground at a ground point located relatively close to said feed point;
wherein the directional pattern of the antenna is shaped by the conductive element.
5 Assignments
0 Petitions
Accused Products
Abstract
An antenna of a radio apparatus, the directional pattern of which can be altered controllably. The antenna comprises at least one conductive element, additional from the viewpoint of the basic operation of the antenna, for shaping the directional pattern of the antenna. Such a conductive element (330, 340) is connected to signal ground at a ground point relatively near the feed point (F) of the antenna. The conductive element has a part (331) the length of which is about a quarter of the wavelength at an operating frequency of the antenna, pointing from the ground point (G) in a direction substantially opposite to the feeding direction of the radiating element (320). That part is used to equalize the directional pattern of the antenna in the receiving band. In addition, the conductive element has a second part (332) pointing from the ground point to the feeding direction of the radiating element to set a directional pattern notch at transmitting band frequencies in a desired direction.
45 Citations
10 Claims
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1. An antenna of a radio apparatus with a directional pattern that can be shaped comprising:
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a radiating element; a feed conductor of the radiating element connected to the radio apparatus at a feed point; and at least one conductive element internal to the radio apparatus and connected only to signal ground at a ground point located relatively close to said feed point; wherein the directional pattern of the antenna is shaped by the conductive element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A radio apparatus comprising an antenna having a radiating element and a feed conductor thereof connected to the radio apparatus at a feed point, the radio apparatus further comprising, at least one internal conductive element, for shaping the directional pattern of the antenna, said conductive element being connected only to signal ground at a ground point located relatively close to said feed point.
Specification