Patent EP0339629A2 successfully refreshed from Google Patents.
EP0339629A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Internally mounted broadband antenna
Assignee: Motorola Solutions Inc
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Filing: 1989-04-27
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Granted: —
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Expires: 2009-04-27
Abstract
Abstract An internally mounted broadband antenna (Figure 5) utilizing two resonators (503, 501 and 505, 501) and a reactive ground feed is disclosed. A nonconductive notch (511) separates a conductive surface (501) into two portions which are coupled to a respective one of each resonator. Each resonator (503, 501 and 505, 501) is a microstrip conductor forming a transmission line with its respective conductive surface portion. Coupling to the antenna is accomplished by connection (519 and 521) across the notch (511).
Inventors
- 👤 Zdravko Zakman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 08:25
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q9/0421; H01Q9/16; H01Q9/28; H01Q9/285
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
135 words
A broadband reactive ground feed antenna characterized by: a conductive surface having a notch extending from a first edge of said conductive surface toward a second edge of said conductive surface thereby dividing said conductive surface into first and second portions about a center line of said notch; a two-point antenna feed coupled to said first and second portions and disposed on symmetrically opposite sides of said notch; a first resonator comprising a microstrip transmission line, said first resonator microstrip transmission line having first and second ends and coupled at said first end to said first portion at said first edge; and a second resonator comprising a microstrip transmission line, said second resonator microstrip transmission line having first and second ends and coupled at said first end to said second portion at said first edge.
Claim 2
Dependent Claim
135 words
A broadband reactive ground feed antenna characterized by: a conductive surface having a notch extending from a first edge of said conductive surface toward a second edge of said conductive surface thereby dividing said conductive surface into first and second portions about a center line of said notch; a two-point antenna feed coupled to said first and second portions and disposed on symmetrically opposite sides of said notch; a first resonator comprising a microstrip transmission line, said first resonator microstrip transmission line having first and second ends and coupled at said first end to said first portion at said first edge; and a second resonator comprising a microstrip transmission line, said second resonator microstrip transmission line having first and second ends and coupled at said first end to said second portion at said first edge.
Claim 3
Dependent Claim
38 words
A broadband reactive ground feed antenna in accordance with claim 1 characterized in that said first resonator microstrip transmission line further comprises means for capacitively coupling said first resonator microstrip transmission line second end to said conductive surface.
Claim 4
Dependent Claim
40 words
A broadband reactive ground feed antenna in accordance with claim 1 characterized in that said second resonator microstrip transmission line second end further comprises means for capacitively coupling said second resonator microstrip transmission line second end to said conductive surface.
Claim 5
Dependent Claim
28 words
A broadband reactive ground feed antenna in accordance with claim 1 characterized in that said first resonator further comprises a copper foil trace on a printed circuit board.
Claim 6
Dependent Claim
28 words
A broadband reactive ground feed antenna in accordance with claim 1 characterized in that said second resonator further comprises a copper foil trace on a printed circuit board.
Claim 7
Dependent Claim
34 words
A broadband reactive ground feed antenna in accordance with claim 1 characterized in that said conductive surface further comprises first and second portions which are essentially symmetrical about a center line of said notch.
Claim 8
Dependent Claim
33 words
A broadband reactive ground feed antenna in accordance with claim 1 characterized in that said first resonator is tuned to a first frequency and said second resonator is tuned to a second frequency.
Claim 9
Dependent Claim
171 words
A broadband dual resonator reactive ground feed antenna for internal mounting in a radio transceiver, characterized by: a conductive ground bracket having a notch extending to a notch end from a first edge of said conductive ground bracket toward a second edge of said conductive ground bracket and dividing said conductive ground bracket into first and second essentially symmetrical halves about a center line of said nonconductive notch; a reactive two-point antenna feed point disposed on said conductive ground bracket at symmetrically opposite sides of said notch and spaced apart from said notch end; a first copper foil trace forming a microstrip transmission line resonator with said first half of said conductive ground bracket, coupled to said first essentially symmetrical half at said first edge, and resonant at a first resonant frequency; and a second copper foil trace forming a microstrip transmission line resonator with said second half of said conductive ground bracket, coupled to said second essentially symmetrical half at said first edge, and resonant at a second resonant frequency.
Claim 10
Dependent Claim
171 words
A broadband dual resonator reactive ground feed antenna for internal mounting in a radio transceiver, characterized by: a conductive ground bracket having a notch extending to a notch end from a first edge of said conductive ground bracket toward a second edge of said conductive ground bracket and dividing said conductive ground bracket into first and second essentially symmetrical halves about a center line of said nonconductive notch; a reactive two-point antenna feed point disposed on said conductive ground bracket at symmetrically opposite sides of said notch and spaced apart from said notch end; a first copper foil trace forming a microstrip transmission line resonator with said first half of said conductive ground bracket, coupled to said first essentially symmetrical half at said first edge, and resonant at a first resonant frequency; and a second copper foil trace forming a microstrip transmission line resonator with said second half of said conductive ground bracket, coupled to said second essentially symmetrical half at said first edge, and resonant at a second resonant frequency.
References Cited (Backward Citations)
No citation records indexed.
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