REMOTE ANTENNA UNIT WITH EXTERNAL POWER CONTROL USING A SINGLE CONTROL LINE
First Claim
1. Apparatus for radio frequency (RF) communications comprising:
- a) a remote fixed gain antenna unit coupled to an antenna; and
b) a feeding unit configured to provide transmit control signals to, and to receive power feedback signals from the remote antenna unit over a single coaxial line.
1 Assignment
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Accused Products
Abstract
Apparatus and methods for efficient external control of the transmit power of a remote fixed gain antenna unit in RF communications. Apparatus embodiments include a separate feeding unit coupled to a remote fixed gain antenna unit through a single coaxial line. The feeding unit is operative to provide transmit control signals to the remote antenna unit based on power feedback created in the remote antenna unit and sent to the feeding unit over the single coaxial line. Feedback and transmit/receive control inputs are transmitted through the single coax line together with RF signals. The coax line may be long. The apparatus and methods may be used in a vehicular environment.
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Citations
22 Claims
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1. Apparatus for radio frequency (RF) communications comprising:
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a) a remote fixed gain antenna unit coupled to an antenna; and b) a feeding unit configured to provide transmit control signals to, and to receive power feedback signals from the remote antenna unit over a single coaxial line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Apparatus for radio frequency (RF) communications comprising:
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a) a remote fixed gain antenna unit coupled to an antenna, wherein the antenna unit includes power feedback functionality; and b) a feeding unit for controlling transmission power in the remote antenna unit based on power feedback provided by the remote antenna unit. - View Dependent Claims (11, 19, 20, 21, 22)
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9. (canceled)
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10. (canceled)
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12. A method for radio frequency (RF) communications using a fixed gain remote antenna unit, comprising the steps of:
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a) providing a feeding unit connected over a single coaxial line to the remote antenna unit; and b) at the feeding unit, receiving feedback signals from the antenna unit through the single coaxial line and, based on the feedback, controlling a transmit power by transmitting control signals to the antenna unit. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification