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EP0895299A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Portable radio device

Assignee: Kyocera Corp
•
Filing: 1997-04-14
•
Granted: —
•
Expires: 2017-04-14
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Abstract

Abstract A small-sized flat antenna mounted on a portable radio communication device is available for a narrow bandwidth, and the resonance frequency of the flat antenna varies due to interference between the flat antenna and surrounding dielectrics such as a housing and a human body. As a result, the transmission efficiency and reception sensitivity of the antenna have been impaired. A communicating section (constructed of a coaxial line or a microstrip line) is arranged in a portable radio communication device having a circularly polarized antenna for satellite communication, so that an appropriate distance is provided not only between a housing of the portable radio communication device and the antenna but also between a human body and the antenna.

Inventors

  • 👤 Akihiro Kyocera Corporation SUGURO

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 02:00
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/08; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q1/244; H01Q1/245; H01Q1/36; H01Q1/362; H01Q21/00; H01Q21/29; H04; H04B; H04B1/00; H04B1/38; H04B1/3827; H04B1/3833; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/1853; H04B7/18569; H04B7/18571

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 50 words
A portable radio communication device wherein a communicating section for transmitting a signal is arranged at an upper portion of a housing of the radio communication device, the housing accommodating a radio communication section therein, and a radiating element of a circularly polarized antenna is held on the communicating section.
Claim 2
Dependent Claim 41 words
A portable radio communication device according to claim 1, wherein the radiating element of the circularly polarized antenna is a radiating element of an antenna having an antenna gain at low elevation angles for communication with satellites in low earth orbit.
Claim 3
Dependent Claim 45 words
A portable radio communication device wherein main beams of two circularly polarized antennas of the portable radio communication device are such that one of the main beams is directed at a high elevation angle and that the other is directed at a low elevation angle.
Claim 4
Dependent Claim 101 words
A portable radio communication device according to claim 3, wherein the two circularly polarized antennas are such that one of the antennas is a flat antenna and that the other is a helical antenna, a conductor surface of a patch of the flat antenna and a top end portion of the helical antenna being directed upward with respect to a housing of the radio communication device, respectively, a main beam of the flat antenna being directed at a high elevation angle and a main beam of the helical antenna being directed at a low elevation angle while supported by the housing.
Claim 5
Dependent Claim 24 words
A portable radio communication device according to claim 4, wherein the flat antenna is fixed to the top end portion of the helical antenna.
Claim 6
Dependent Claim 56 words
A portable radio communication device according to claim 4, wherein the helical antenna is supported at the upper portion of the housing of the radio communication device so as to be distant from the upper portion of the housing while interposing a signal transmission path between the helical antenna and the upper portion of the housing.

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