Antenna device having a matching means
First Claim
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1. An antenna device for a portable radio communication device operating within UHF or adjacent frequency ranges, comprising:
- a housing having mounting means for mounting on a radio communication device,a radiating first element carried by the housing,the first element having a first feed point at which it exhibits a first impedance Z1,an impedance matching means carried by the housing adjacent to the first feed point and having first and second coupling means exhibiting essentially the first impedance Z1 and a second impedance Z2, respectively,the first coupling means connected to the first feed point,the second coupling means including first and second conductive members to be connected to the radio communication device,the impedance matching means including at least one reactive element connected between the first and second coupling means,the impedance matching means including a dielectric substrate carried by the housing,the substrate carrying the reactive element(s) and a conductor pattern, which interconnects the reactive element(s) and the coupling means,the substrate has an at least partly circular outer edge for mounting in a corresponding groove or recess in a base of the housing, andthe substrate is mounted substantially perpendicular to a direction in which the first element extends.
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Abstract
An antenna device is disclosed, which is intended for a portable radio communication device, in particular a pocket size cellular telephone. The novel antenna device includes a housing (1) having mounting means (2) for mounting on the telephone (3), helically configured first radiator (4) carried by the housing, and an impedance matching means (6) formed by reactive components on a dielectric substrate provided with a printed circuit pattern. The matching means is carried by the housing and it matches an impedance of the first radiator to an impedance of transceiver circuitry of the telephone. The antenna device may include one or more radiators in addition to the first radiator. The disclosed antenna means is particularly advantageous when the antenna device includes at least one radiator of half-wave type.
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Citations
29 Claims
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1. An antenna device for a portable radio communication device operating within UHF or adjacent frequency ranges, comprising:
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a housing having mounting means for mounting on a radio communication device, a radiating first element carried by the housing, the first element having a first feed point at which it exhibits a first impedance Z1, an impedance matching means carried by the housing adjacent to the first feed point and having first and second coupling means exhibiting essentially the first impedance Z1 and a second impedance Z2, respectively, the first coupling means connected to the first feed point, the second coupling means including first and second conductive members to be connected to the radio communication device, the impedance matching means including at least one reactive element connected between the first and second coupling means, the impedance matching means including a dielectric substrate carried by the housing, the substrate carrying the reactive element(s) and a conductor pattern, which interconnects the reactive element(s) and the coupling means, the substrate has an at least partly circular outer edge for mounting in a corresponding groove or recess in a base of the housing, and the substrate is mounted substantially perpendicular to a direction in which the first element extends. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An antenna device for a portable radio communication device operating within UHF or adjacent frequency ranges, comprising:
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a housing having mounting means for mounting on a radio communication device, a radiating first element carried by the housing, the first element being helically configured, the first element having a first feed point at which it exhibits a first impedance Z1, an impedance matching means carried by the housing adjacent to the first feed point and having first and second coupling means exhibiting essentially the first impedance Z1 and a second impedance Z2, respectively, the first coupling means connected to the first feed point, the second coupling means including first and second conductive members to be connected to the radio communication device, the impedance matching means including at least one reactive element connected between the first and second coupling means, the impedance matching means including a dielectric substrate carried by the housing, the substrate carrying the reactive element(s) and a conductor pattern, which interconnects the reactive element(s) and the coupling means, a radiating second element being an essentially straight radiator which is slidable through the first element along an essentially common axis, and the substrate having an annular form to permit the second element to be retracted through it. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An antenna device for a portable radio communication device operating within UHF or adjacent frequency ranges, comprising:
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a housing having mounting means for mounting on a radio communication device, a radiating first element carried by the housing, the first element having a first feed point at which it exhibits a first impedance Z1, an impedance matching means carried by the housing adjacent to the first feed point and having first and second coupling means exhibiting essentially the first impedance Z1 and a second impedance Z2, respectively, the first coupling means connected to the first feed point, the second coupling means including first and second conductive members to be connected to the radio communication device, the impedance matching means including at least one reactive element connected between the first and second coupling means, the impedance matching means including a dielectric substrate carried by the housing, the substrate carrying the reactive element(s) and a conductor pattern, which interconnects the reactive element(s) and the coupling means, the first and second conductive members are non-coaxially configured. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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Specification
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Current AssigneeAllgon AB (Bure Equity AB)
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Original AssigneeAllgon AB (Bure Equity AB)
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InventorsEngblom, Gunnar
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Primary Examiner(s)Wong, Don
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Assistant Examiner(s)PHAN, THO GIA
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Application NumberUS08/850,512Time in Patent Office907 DaysField of Search343/702, 343/749, 343/850, 343/852, 343/858, 343/860, 343/895, 343/872US Class Current343/702CPC Class CodesH01Q 1/242 specially adapted for hand-...
