Antenna system
First Claim
1. A binary signal encoder, comprising:
- a source of binary signals; and
an encoder fed by the source of binary signals for encoding each bit of the binary signals into a bipolar pulse pair and with each of the encoded bits having the same average voltage level, the pulse pair having a level which changes from the average voltage level to a first voltage level, then from the first voltage level to a second voltage level, then from the second level back to the average voltage level and wherein the encoder produces the average voltage level between each successive pair of encoded bits.
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Abstract
A phased array antenna system having an array of antenna elements coupled to radio frequency energy feed network through a plurality of phase shifter sections with digital control data being fed to the phase shifter sections with radio frequency energy signal modulated with the digital control data. A modulator is fed by the source of the radio frequency energy and a modulating signal to produce the modulated radio frequency energy signal. A modulating signal generator/encoder, fed by the digital control data, encodes each bit of such digital control data into the modulating signal, such modulating signal being a bipolar signal having a pair of electrical signal changes corresponding to a binary state represented by such bit. The modulated radio frequency energy signal may be fed to the demodulator through the radio frequency feed network or through the antenna element coupled thereto. The demodulator section produces a demodulated bipolar signal corresponding to the bipolar modulating signal and decodes the demodulated bipolar signal into a binary signal having logic states corresponding to the binary states represented by the encoded bits of the bipolar modulating signal. An output section is fed by the detector and decoder section for converting the binary signal produced by the detector and decoder section into the digital words for the phase shifter section. The digital control data includes a strobe signal. The plurality of phase shifter sections act to properly configure themselves to radio frequency energy passing therethrough in accordance with control words addressed thereto in response to detection of the strobe signal.
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Citations
14 Claims
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1. A binary signal encoder, comprising:
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a source of binary signals; and an encoder fed by the source of binary signals for encoding each bit of the binary signals into a bipolar pulse pair and with each of the encoded bits having the same average voltage level, the pulse pair having a level which changes from the average voltage level to a first voltage level, then from the first voltage level to a second voltage level, then from the second level back to the average voltage level and wherein the encoder produces the average voltage level between each successive pair of encoded bits. - View Dependent Claims (2)
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3. A binary signal encoder/decoder, comprising:
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a source of binary signals; an encoder fed by the source of binary signals for encoding each bit of the binary signals into a bipolar pulse pair and with each of the encoded bits having the same average voltage level, the pulse pair having a level which chances from the average voltage level to a first voltage level, then from the first voltage level to a second voltage level, then from the second level back to the average voltage level and wherein the encoder produces the average voltage level between each successive pair of encoded bits; and a decoder, fed by the encoded bits, for decoding the encoded bits into a binary signal having logic states corresponding to the binary states represented by the encoded bits. - View Dependent Claims (4, 5, 6, 7, 8)
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- 9. A method of encoding binary signals comprising the step of encoding each bit of the binary signals into a bipolar pulse pair and with each of the encoded bits and with each of the encoded bits having the same average voltage level, the pulse pair having a level which chances from the average voltage level to a first voltage level, then from the first voltage level to a second voltage level, then from the second level back to the average voltage level and wherein the average voltage level is produced between each successive pair of encoded bits.
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11. A method for encoding and decoding binary signals, comprising the steps of:
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encoding each bit of the binary signals into a bipolar pulse pair with each of the encoded bits having the same average voltage level, the pulse pair having a level which changes from the average voltage level to a first voltage level, then from the first voltage level to a second voltage level, then from the second level back to the average voltage level and wherein the average voltage level is produced between each successive pair of encoded bits; and decoding the encoded bits into a binary signal having logic states corresponding to the binary states represented by the encoded bits. - View Dependent Claims (12, 13, 14)
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Specification