Antenna arrangement for connecting an external device to a radio device
First Claim
1. An arrangement for connecting an external device to a radio device via its antenna, the arrangement comprising a coupler to be placed on top of a casing of the radio device at the antenna and to be connected to the external device with a intermediate cable, the coupler comprising a coupling element for transferring radio frequency energy between the radio device and said intermediate cable, whereina radiating element of the antenna is a conductive part of the casing of the radio device, in which case the coupling element is placed against the radiating element when the coupler is set in its place, andthe radiating element has only electromagnetic coupling to other conductive parts of the radio device.
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0 Petitions
Accused Products
Abstract
An arrangement by which an external device is connected to a radio device via its antenna without modifying the radio device mechanically. The radiating element (311) of the antenna of the radio device is a conductive part of its casing, which is fed electromagnetically by means of a feed element (322). The connecting is implemented by a coupler (310) to be placed at the antenna on top of the casing, from which coupler there is an intermediate cable (350) to the external device. The coupler includes a coupling element (311), from which there is electromagnetic coupling to the radiating element (321) through a thin dielectric membrane, or direct galvanic coupling. From the coupling element to the jumper cable there is electromagnetic coupling through an intermediate element (312), or direct galvanic coupling. Because the radiating plane is located on the outer surface of the radio device, its distance to the coupling element can be made very small. Thus the attenuation caused by the coupler on the transfer path from the antenna port of the radio device to the external device is lower than in the known arrangements.
52 Citations
10 Claims
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1. An arrangement for connecting an external device to a radio device via its antenna, the arrangement comprising a coupler to be placed on top of a casing of the radio device at the antenna and to be connected to the external device with a intermediate cable, the coupler comprising a coupling element for transferring radio frequency energy between the radio device and said intermediate cable, wherein
a radiating element of the antenna is a conductive part of the casing of the radio device, in which case the coupling element is placed against the radiating element when the coupler is set in its place, and the radiating element has only electromagnetic coupling to other conductive parts of the radio device.
Specification