Dual orthogonal monopole antenna system
First Claim
1. An antenna system, comprising:
- a first monopole antenna, the first monopole antenna generally disposed on a first layer, the first layer extending from a portion of a printed circuit board, the printed circuit board having circuitry mounted thereon, the circuitry providing communications functions;
a second monopole antenna arranged generally orthogonally to the first monopole antenna, the second monopole antenna generally disposed on a second layer, the second layer extending from the portion of the circuit board;
a ground plane conductor disposed generally between the antennas; and
a feed circuit coupled to the first and second monopole antennas to connect the first and second monopole antennas to a host system.
6 Assignments
0 Petitions
Accused Products
Abstract
An antenna system for use in wireless communication systems that is based on a pair of monopole antennas, which are electrically isolated from each other and arranged generally orthogonally. A feed circuit is coupled to the first and second monopole antennas, which connects them to a host system. Also, a ground plane conductor extends generally between the feeds for the first and second monopole antennas to improve isolation. The monopole antennas are formed on a printed circuit board, formed on first and second dielectric layers. A ground plane conductive film is disposed between the dielectric layers. The first monopole antenna is formed on an outside surface of the first dielectric layer, and the second monopole antenna is formed on the outside surface of the second dielectric layer. The second monopole antenna is arranged generally orthogonally to the first monopole antenna. The first and second monopole antennas comprise impedance matched microstrips, and the feed circuit comprises a first impedance matched unbalanced line coupled to the first monopole antenna, and a second impedance matched unbalanced line coupled to the second monopole antenna.
344 Citations
45 Claims
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1. An antenna system, comprising:
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a first monopole antenna, the first monopole antenna generally disposed on a first layer, the first layer extending from a portion of a printed circuit board, the printed circuit board having circuitry mounted thereon, the circuitry providing communications functions; a second monopole antenna arranged generally orthogonally to the first monopole antenna, the second monopole antenna generally disposed on a second layer, the second layer extending from the portion of the circuit board; a ground plane conductor disposed generally between the antennas; and a feed circuit coupled to the first and second monopole antennas to connect the first and second monopole antennas to a host system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An antenna system, comprising:
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a first dielectric layer having an outside surface and an inside surface; a second dielectric layer having an outside surface and an inside surface, the second dielectric layer generally parallel to the first dielectric layer; a ground plane conductive film between the inside surfaces of the first and second dielectric layers; a first monopole antenna on the outside surface of the first dielectric layer; a second monopole antenna on the outside surface of the second dielectric layer, and arranged generally orthogonally to the first monopole antenna; and a feed circuit coupled to the first and second monopole antennas to connect the first and second monopole antennas to a host system. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An antenna system for a communications device, the communications device including a circuit board with circuitry providing communications functions and a shield, the shield being coupled to the circuit board and being positioned with respect to the circuit board to shield the circuitry on the circuit board with respect to electromagnetic radiation, comprising:
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a first dielectric layer coupled to the circuit board and extending outside the shield, the first dielectric layer having an outside surface and an inside surface; a second dielectric layer coupled to the circuit board and extending outside the shield, the second dielectric layer having an outside surface and an inside surface; a ground plane conductive film coupled to the circuitry and extending outside the shield between the inside surfaces of the first and second dielectric layers; a first monopole antenna extending outside the shield, the first monopole antenna comprising an impedance matched microstrip on the outside surface of the first dielectric layer; a second monopole antenna extending outside the shield, the second monopole antenna comprising an impedance matched microstrip on the outside surface of the second dielectric layer, and arranged generally orthogonally to the first monopole antenna; and a feed circuit to connect the first and second monopole antennas to the shielded circuitry. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. An antenna system for a communication device, comprising:
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a first dielectric layer having an outside surface and an inside surface; a second dielectric layer having an outside surface and an inside surface, the second dielectric layer generally parallel to the first dielectric layer; a ground plane conductive film between the inside surfaces of the first and second dielectric layers; a first monopole antenna on the outside surface of the first dielectric layer; a second monopole antenna on the outside surface of the second dielectric layer, the second monopole antenna arranged generally orthogonally to the first monopole antenna; a feed circuit coupled to the first and second monopole antennas; and a switch circuit and a switch driver, coupled to the feed circuit, which periodically selects the first monopole antenna and the second monopole antenna with a period greater than a characteristic reception interval for packets of data received at the antenna system, independent of other processing in the communications device. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification