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EP0375416A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Plane slot antenna

Assignee: Harada Industry Co Ltd
•
Filing: 1989-12-21
•
Granted: —
•
Expires: 2009-12-21
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Abstract

Abstract A plane slot antenna including a peripheral con­ducting surface (11), a central conducting surface (13) provided in the peripheral conducting surface with a space (21) in between, and a plurality of coaxial lines (20, 30). The cores (21, 31) of the coaxial lines are connected to the central conducting surface at different points thereof and outer skins (22, 32) of the coaxial lines are connected to the peripheral conducting sur­face. The antenna further includes a switch (40) pro­vided between the coaxial lines and a signal receiver so that the switch changes a connection between one of the coaxial lines and the signal receiver so that the antenna receives signal of best possible strength and phase.

Inventors

  • 👤 Takuji Harada

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-27 13:56
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H01Q13/16; H01Q1/00; H01Q1/27; H01Q1/32; H01Q1/325; H01Q1/3275; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/0464

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 39 words
A plane antenna of the type of a circular slot antenna, characterized in that two or more signal line lead-out positions are provided and an output is extracted from whichever position is favorable in terms of a specified condition.
Claim 2
Dependent Claim 39 words
A plane antenna of the type of a circular slot antenna, characterized in that two or more signal line lead-out positions are provided and an output is extracted from whichever position is favorable in terms of a specified condition.
Claim 3
Dependent Claim 22 words
A plane antenna according to claim 1, charac­terized in that said specified condition is the strength or phase of the reception signal.
Claim 4
Dependent Claim 23 words
A plane antenna according to claim 1, charac­terized in that selection of one of said two or ore lead-out positions is accomplished electronically.
Claim 5
Dependent Claim 112 words
A plane slot antenna characterized by comprising: a peripheral conducting surface (11); a central conducting surface (13) provided in said peripheral conducting surface with a space (21) in between; a plurality of coaxial lines (20, 30), core conduc­tors (21, 31) of said coaxial lines connected to said central conducting surface at different points on said central conducting surface and outer skins (22, 32) of said coaxial lines, connected to said peripheral con­ducting surface; and a switching means (40) provided between said coax­ial lines and a signal receiver, said switching means switching a connection between one of said coaxial lines and said signal receiver depending upon the strength and phase of received signal.
Claim 6
Dependent Claim 112 words
A plane slot antenna characterized by comprising: a peripheral conducting surface (11); a central conducting surface (13) provided in said peripheral conducting surface with a space (21) in between; a plurality of coaxial lines (20, 30), core conduc­tors (21, 31) of said coaxial lines connected to said central conducting surface at different points on said central conducting surface and outer skins (22, 32) of said coaxial lines, connected to said peripheral con­ducting surface; and a switching means (40) provided between said coax­ial lines and a signal receiver, said switching means switching a connection between one of said coaxial lines and said signal receiver depending upon the strength and phase of received signal.
Claim 7
Dependent Claim 40 words
A plane slot antenna according to claim 4, characterized by further comprising a detecting means detecting said strength and phase of said received sig­nal so that said switching means switches said connec­tion between said coaxial lines and said signal receiver.

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