Compact, low profile, single feed, multi-band, printed antenna
First Claim
1. A low profile antenna, comprising:
- a printed circuit board having a metal ground plane element on a first portion of one surface of said printed circuit board;
a single metal radiating element on a second portion of said one surface of said printed circuit board, said metal radiating element being coplanar with, and laterally spaced from, said ground plane element;
a short-circuiting metal strip on said one surface of said printed circuit board, said short-circuiting metal strip extending from said second portion of said printed circuit board to said first portion of said printed circuit board, and directly connecting a portion of said radiating element to said ground plane element; and
a metal antenna feed strip extending from said radiating element;
said single radiating element being formed in a one-part geometric configuration to provide a multi-band response, the multi-band response for said antenna being a function of said geometric configuration.
1 Assignment
0 Petitions
Accused Products
Abstract
Printed circuit techniques and two-shot molding techniques are used to form a metal radiating element, a metal ground plane element, a metal antenna feed, a metal short-circuiting strip and metal capacitive loading plates within small antennas that are buried within transmit/receive radio-devices such a mobile cellular telephones. Balanced and unbalanced, single-feed, two and three band antennas are provided wherein the radiating element is laterally spaced from the ground plane element, to thereby provide an antenna having a very low profile or height, including antennas wherein the ground plane element and the radiating element are placed coplanar on the same surface of a PCB. A thin dielectric carriage on a PCB allows for the metal capacitive loading plates to be placed on the sidewalls of the dielectric carriage, to thereby provide reactive loading of a radiating element that is on the top surface of the dielectric carriage.
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Citations
11 Claims
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1. A low profile antenna, comprising:
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a printed circuit board having a metal ground plane element on a first portion of one surface of said printed circuit board;
a single metal radiating element on a second portion of said one surface of said printed circuit board, said metal radiating element being coplanar with, and laterally spaced from, said ground plane element;
a short-circuiting metal strip on said one surface of said printed circuit board, said short-circuiting metal strip extending from said second portion of said printed circuit board to said first portion of said printed circuit board, and directly connecting a portion of said radiating element to said ground plane element; and
a metal antenna feed strip extending from said radiating element;
said single radiating element being formed in a one-part geometric configuration to provide a multi-band response, the multi-band response for said antenna being a function of said geometric configuration. - View Dependent Claims (2, 3, 4, 5)
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6. A mobile radio-device, comprising:
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a printed circuit board having a metal ground plane element on a first portion of said printed circuit board;
electrical circuitry for said mobile radio-device physically associated with said ground plane element, said ground plane element providing a common-electrical-potential connection, such as a ground connection, for said electrical circuitry;
a metal antenna radiating element consisting of only one part on a second portion of said printed circuit board, said antenna radiating element being coplanar with, and laterally spaced from, said ground plane element;
said antenna radiating element being formed in a geometric configuration, the geometric configuration providing a multi-band response for said mobile radio-device;
a short-circuiting metal strip on said one surface of said printed circuit board, said short-circuiting metal strip extending from said second portion of said printed circuit board to said first portion of said printed circuit board, and directly connecting a portion of said radiating element to said ground plane element; and
a metal antenna feed strip extending from a first portion of said antenna radiating element to said electrical circuitry.
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7. A low profile antenna, comprising:
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a printed circuit board having a metal ground plane element on a first portion of one surface of said printed circuit board;
a metal radiating element on a second portion of said one surface of said printed circuit board, said metal radiating element being coplanar with, and laterally spaced from, said ground plane element;
a metal antenna feed strip extending from said radiating element; and
a short-circuiting metal strip on said one surface of said printed circuit board, said short-circuiting metal strip extending from said second portion of said printed circuit board to said first portion of said printed circuit board, and directly connecting a portion of said radiating element to said ground plane element. - View Dependent Claims (8, 9)
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10. A mobile radio-device, comprising:
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a printed circuit board having a metal ground plane element on a first portion of said printed circuit board;
electrical circuitry for said mobile radio-device physically associated with said ground plane element, said ground plane element providing a common-electrical-potential connection, such as a ground connection, for said electrical circuitry;
a metal antenna radiating element on a second portion of said printed circuit board, said antenna radiating element being coplanar with, and laterally spaced from, said ground plane element;
a metal antenna feed strip extending from a first portion of said antenna radiating element to said electrical circuitry; and
a short-circuiting metal strip on said printed circuit board, said short-circuiting metal strip extending from said second portion of said printed circuit board to said first portion of said printed circuit board, and directly connecting a second portion of said antenna radiating element to said ground plane element, said second portion of said antenna radiating element being physically spaced from said first portion of said antenna radiating element. - View Dependent Claims (11)
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Specification