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EP0571124A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Mobile data terminal

Assignee: International Business Machines Corp
•
Filing: 1993-05-11
•
Granted: —
•
Expires: 2013-05-11
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Abstract

Abstract An external antenna 20 for use with a mobile battery powered data processing terminal 12 is disclosed, the terminal including a radio frequency communication device 36, such as a cellular telephone transceiver. Multiple antenna elements are mounted within a D-shaped flexible tubular member 38 having a very low dielectric constant which is then affixed to the external surface of the data processing terminal, utilizing an adhesive on the flat surface thereof. The flexible tubular member is preferably mounted along at least two edges of the data processing terminal display module such that spatial or polarization diversity for the multiple antenna elements may be provided. A coaxial connector 21 is utilized to couple the multiple antenna elements to a radio frequency communication device within the data processing terminal. In this matter, an external antenna may be added to a battery powered data processing terminal in a manner which will protect the antenna without interfering with radio frequency transmission or reception while simultaneously providing additional protection for the data processing terminal.

Inventors

  • 👤 Robert Vincent Jenness
  • 👤 Victor Stuart Moore

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-28 16:17
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/2258

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 89 words
A mobile data terminal (12), including a radio frequency communication device (36) for transmitting data via a radio frequency communication network, a multi-element radio frequency antenna (20) coupled to said radio frequency communication device, and a case having at least two substantially orthogonal sides, and characterised in that said multi-element radio frequency antenna is mountable on the exterior of said case along said at least two substantially orthogonal sides, with at least one element of said multi-element radio frequency antenna disposed on each of said at least two sides.
Claim 2
Dependent Claim 21 words
The mobile data terminal according to Claim 1, wherein said multi-element radio frequency antenna comprises a three element radio frequency antenna.
Claim 3
Dependent Claim 42 words
The mobile data terminal according to Claim 2, wherein said multi-element radio frequency antenna is mountable on the exterior of said case along three sides thereof and wherein each of said three elements is disposed on a separate side of said case.
Claim 4
Dependent Claim 24 words
The mobile data terminal according to any preceding claim wherein said multi-element radio frequency antenna is disposed within a flexible insulating elongate member (38).
Claim 5
Dependent Claim 24 words
The mobile data terminal according to Claim 4, wherein said flexible insulating elongate member comprises a flexible insulating elongate tube having a D-shaped cross-section.
Claim 6
Dependent Claim 49 words
The mobile data terminal according to Claim 4 or 5, wherein said flexible insulating elongate tube is constructed of a flexible material having a dielectric constant less than 0.001, such that radio frequency emissions from said multi-element radio frequency antenna will pass freely through said flexible insulating elongate tube.
Claim 7
Dependent Claim 35 words
The mobile data terminal according to claim 4, 5 or 6, wherein the multi-element radio frequency antenna includes means (42) adapted to affix said flexible insulating elongate tubular member to the exterior of said case.
Claim 8
Dependent Claim 47 words
The mobile data terminal according to Claim 7, as dependent on claim 5 or 6, wherein said means adapted to affix said flexible insulating elongate tubular member to said case comprises an adhesive backing along at least a portion of a flat surface of said D-shaped cross-section.
Claim 9
Dependent Claim 27 words
The mobile data terminal according to any preceding claim, wherein said flexible insulating elongate tubular member has a length greater than the greatest side of said case.
Claim 10
Dependent Claim 16 words
A multi-element radio frequency antenna for use in the mobile data terminal of any preceding claim.

References Cited (Backward Citations)

WO1985000480A1 Cited
DE3712956A1 Cited
WO1991004461A1 Cited

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