Loop antenna with transmission line feed
First Claim
Patent Images
1. A loop antenna comprising:
- a ground plane,a loop portion located on one side of the ground plane and having opposed ends,a transmission line portion located on the opposite side of the ground plane and having opposed ends,a first capacitance means interconnecting first ends of the loop portion and the transmission line portion,a second capacitance means interconnecting second ends of the loop portion and the transmission line portion; and
the transmission line portion being a microstrip formed by the said ground plane and a microstrip line portion.
1 Assignment
0 Petitions
Accused Products
Abstract
A loop antenna includes a circuit board having a ground plane layer. A formed loop is located on one side of the circuit board and a transmission line is located on the opposite side of the circuit board. Capacitors interconnect the ends of the formed loop and the transmission line. The transmission line is a microstrip formed by the ground plane layer in a microstrip portion.
The circuit board includes RF circuitry that is located on the side of the circuit board opposite to the transmission line so that the ground plane shields the circuitry from the transmission line.
41 Citations
4 Claims
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1. A loop antenna comprising:
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a ground plane, a loop portion located on one side of the ground plane and having opposed ends, a transmission line portion located on the opposite side of the ground plane and having opposed ends, a first capacitance means interconnecting first ends of the loop portion and the transmission line portion, a second capacitance means interconnecting second ends of the loop portion and the transmission line portion; and the transmission line portion being a microstrip formed by the said ground plane and a microstrip line portion. - View Dependent Claims (2)
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3. A loop antenna comprising:
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a ground plane, a loop portion located on one side of the ground plane and having opposed ends, a transmission line portion located on the opposite side of the ground plane and having opposed ends, a first capacitance means interconnecting first ends of the loop portion and the transmission line portion, a second capacitance means interconnecting second ends of the loop portion and the transmission line portion; the ground plane being a layer of a circuit board, and the circuit board including radio circuitry mounted on the opposite side of the circuit board from the transmission line portion. - View Dependent Claims (4)
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Specification
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Current AssigneeMotorola, Inc. (Motorola Solutions, Inc.)
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Original AssigneeMotorola, Inc. (Motorola Solutions, Inc.)
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InventorsSiwiak, Kazimierz, Goldenberg, Michael P., Ponce de Leon, Lorenzo A.
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Primary Examiner(s)Wimer, Michael C.
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Application NumberUS07/297,151Time in Patent Office1,215 DaysField of Search343/702, 343/741, 343/744, 343/748, 343/846, 343/848, 343/829US Class Current343/744CPC Class CodesH01Q 1/243 with built-in antennasH01Q 7/005 with variable reactance for...
