PHASED ARRAY ANTENNA SYSTEM WITH VARIABLE ELECTRICAL TILT
First Claim
1. A phased array antenna system with variable electrical tilt and including an array of antenna elements, the system comprising:
- a variable phase shifter for introducing a variable relative phase shift between a first signal and a second signal;
a phase to power converter for converting the first signal and the second signal having the variable relative phase shift into signals whose powers are a function of the variable relative phase shift;
first and second power splitters for dividing the first signal and the second signal that are converted into at least two sets of divided signals; and
power to phase converters for combining pairs of the divided signals from different power splitters to provide vector sum and difference components for supply to respective pairs of antenna elements located at like distances with respect to an array center.
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Accused Products
Abstract
A phased array antenna system with variable electrical tilt comprises an array of antenna elements etc. incorporating a divider dividing a radio frequency (RF) carrier signal into two signals between which a phase shifter introduces a variable phase shift. A phase to power converter converts the phase shifted signals into signals with powers dependent on the phase shift. Power splitters divide the converted signals into two sets of divided signals with total number equal to the number of antenna elements in the array. Power to phase converters etc. combine pairs of divided signals from different power splitters this provides vector sum and difference components with appropriate phase for supply to respective pairs of antenna elements etc. located equidistant from an array centre. Adjustment of the phase shift provided by phase shifter changes the angle of electrical tilt of the antenna array.
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Citations
22 Claims
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1. A phased array antenna system with variable electrical tilt and including an array of antenna elements, the system comprising:
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a variable phase shifter for introducing a variable relative phase shift between a first signal and a second signal; a phase to power converter for converting the first signal and the second signal having the variable relative phase shift into signals whose powers are a function of the variable relative phase shift; first and second power splitters for dividing the first signal and the second signal that are converted into at least two sets of divided signals; and power to phase converters for combining pairs of the divided signals from different power splitters to provide vector sum and difference components for supply to respective pairs of antenna elements located at like distances with respect to an array center. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of providing a variable electrical tilt in a phased array antenna system including an array of antenna elements, comprising:
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introducing a variable relative phase shift between a first signal and a second signal; converting the first signal and a second signal having the variable relative phase shift into signals whose powers are a function of the variable relative phase shift; using power splitters to divide the first signal and the second signal that are converted into at least two sets of divided signals, and combining pairs of the divided signals from different power splitters to provide vector sum and difference components for supply to respective pairs of antenna elements located at like distances with respect to an array center. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification