Integrated, closely spaced, high isolation, printed dipoles
First Claim
1. An antenna configuration for a repeater receiving and re-transmitting a signal on a predetermined frequency, the antenna configuration comprising:
- a generally planar shaped multi-layer circuit board;
a first planar antenna printed on a first layer of the generally planar multi-layer circuit board, the first planar antenna capable of transmitting and receiving energy associated with the predetermined frequency; and
a second planar antenna printed on a second layer of the multi-layer circuit board, the second planar antenna capable of transmitting and receiving energy associated with the predetermined frequency, wherein the first layer and the second layer include a ground plane having a non-symmetrical current reducing structure, and the first planar antenna and the second planar antenna are arranged in a co-planar orthogonal relation to each other.
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Accused Products
Abstract
An antenna configuration includes two closely spaced antennas each positioned so as to be orthogonally polarized with respect to the other. The antenna configuration increases antenna isolation and reduces electromagnetic coupling between donor side antenna and repeat side antenna. The antennas include printed dipoles connected to respective transceivers through respective baluns to balance the non-symmetrical portions of the antenna feed paths to reduce unwanted radiation therein. Printed features such as chokes and non-symmetrical and non-parallel structures are preferably included in the ground plane of a multi-layer circuit board to reduce or eliminate circulating ground currents.
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Citations
26 Claims
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1. An antenna configuration for a repeater receiving and re-transmitting a signal on a predetermined frequency, the antenna configuration comprising:
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a generally planar shaped multi-layer circuit board;
a first planar antenna printed on a first layer of the generally planar multi-layer circuit board, the first planar antenna capable of transmitting and receiving energy associated with the predetermined frequency; and
a second planar antenna printed on a second layer of the multi-layer circuit board, the second planar antenna capable of transmitting and receiving energy associated with the predetermined frequency, wherein the first layer and the second layer include a ground plane having a non-symmetrical current reducing structure, and the first planar antenna and the second planar antenna are arranged in a co-planar orthogonal relation to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A time division duplex (TDD) repeater receiving and re-transmitting a signal on a predetermined frequency, the TDD repeater comprising:
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a generally planar shaped multi-layer circuit board arranged in a plane;
a first transceiver integrated in the multi-layer circuit board;
a second transceiver integrated in the multi-layer circuit board;
a first planar antenna printed on a first layer of the multi-layer circuit board in the plane, the first planar antenna coupled to the first transceiver and capable of radiating and receiving electromagnetic energy associated with the frequency; and
a second planar antenna printed on a second layer of the multi-layer circuit board in the plane, the second planar antenna coupled to the second transceiver and capable of radiating and receiving energy associated with the frequency, wherein the first planar antenna and the second planar antenna are arranged in co-planar orthogonal relation to each other. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A multi-layer circuit board arrangement in a time division duplex (TDD) repeater capable of receiving and re-transmitting a signal on a predetermined frequency, the multi-layer circuit board arrangement comprising:
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a multi-layer circuit board having a ground plane;
a first planar antenna printed on a first layer of the multi-layer circuit board in the plane, the first planar antenna capable of radiating and receiving electromagnetic energy associated with the frequency according to a first planar polarization direction; and
a second planar antenna printed on a second layer of the multi-layer circuit board in the plane, the second planar antenna capable of radiating and receiving energy associated with the frequency according to a second planar polarization direction different from the first planar polarization direction, wherein the first planar polarization direction and the second planar polarization direction are orthogonal to each other. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification