Amplitude modulation scanning antenna system
An antenna system forming a cluster of closely spaced beams filling a desired angular scan sector is disclosed. A transmit signal amplitude applied to each beam is modulated as a function of time to form a composite beam which scans smoothly across the scan sector. The RF transmit signal is initiall...
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| creator | HEMMI CHRISTIAN O HAYES WILLIAM F |
| description | An antenna system forming a cluster of closely spaced beams filling a desired angular scan sector is disclosed. A transmit signal amplitude applied to each beam is modulated as a function of time to form a composite beam which scans smoothly across the scan sector. The RF transmit signal is initially split into a plurality of equal amplitude signals and fed to a plurality of attenuators by power dividers for selective amplitude modulation of the RF signals. The amplitude modulating signals are supplied the attenuator by a digital controller which also supplies switch control signals to selectively switch amplitude modulating transmit signals of varying amplitude to selected feed elements of an array of radiating elements in a time sequence for feeding an antenna reflector. |
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A transmit signal amplitude applied to each beam is modulated as a function of time to form a composite beam which scans smoothly across the scan sector. The RF transmit signal is initially split into a plurality of equal amplitude signals and fed to a plurality of attenuators by power dividers for selective amplitude modulation of the RF signals. The amplitude modulating signals are supplied the attenuator by a digital controller which also supplies switch control signals to selectively switch amplitude modulating transmit signals of varying amplitude to selected feed elements of an array of radiating elements in a time sequence for feeding an antenna reflector.</description><language>eng</language><subject>ANALOGOUS ARRANGEMENTS USING OTHER WAVES ; ANTENNAS, i.e. RADIO AERIALS ; BASIC ELECTRIC ELEMENTS ; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ; ELECTRICITY ; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES ; MEASURING ; PHYSICS ; RADIO DIRECTION-FINDING ; RADIO NAVIGATION ; TESTING</subject><creationdate>1976</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19761123&DB=EPODOC&CC=US&NR=3993999A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,777,882,25545,76296</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19761123&DB=EPODOC&CC=US&NR=3993999A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>HEMMI; CHRISTIAN O</creatorcontrib><creatorcontrib>HAYES; WILLIAM F</creatorcontrib><title>Amplitude modulation scanning antenna system</title><description>An antenna system forming a cluster of closely spaced beams filling a desired angular scan sector is disclosed. 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The amplitude modulating signals are supplied the attenuator by a digital controller which also supplies switch control signals to selectively switch amplitude modulating transmit signals of varying amplitude to selected feed elements of an array of radiating elements in a time sequence for feeding an antenna reflector.</description><subject>ANALOGOUS ARRANGEMENTS USING OTHER WAVES</subject><subject>ANTENNAS, i.e. RADIO AERIALS</subject><subject>BASIC ELECTRIC ELEMENTS</subject><subject>DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES</subject><subject>ELECTRICITY</subject><subject>LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES</subject><subject>MEASURING</subject><subject>PHYSICS</subject><subject>RADIO DIRECTION-FINDING</subject><subject>RADIO NAVIGATION</subject><subject>TESTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1976</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNBxzC3IySwpTUlVyM1PKc1JLMnMz1MoTk7My8vMS1dIzCtJzctLVCiuLC5JzeVhYE1LzClO5YXS3Azybq4hzh66qQX58anFBYnJqXmpJfGhwcaWlkBk6WhMWAUANa8p3w</recordid><startdate>19761123</startdate><enddate>19761123</enddate><creator>HEMMI; CHRISTIAN O</creator><creator>HAYES; WILLIAM F</creator><scope>EVB</scope></search><sort><creationdate>19761123</creationdate><title>Amplitude modulation scanning antenna system</title><author>HEMMI; CHRISTIAN O ; HAYES; WILLIAM F</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US3993999A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1976</creationdate><topic>ANALOGOUS ARRANGEMENTS USING OTHER WAVES</topic><topic>ANTENNAS, i.e. RADIO AERIALS</topic><topic>BASIC ELECTRIC ELEMENTS</topic><topic>DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES</topic><topic>ELECTRICITY</topic><topic>LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES</topic><topic>MEASURING</topic><topic>PHYSICS</topic><topic>RADIO DIRECTION-FINDING</topic><topic>RADIO NAVIGATION</topic><topic>TESTING</topic><toplevel>online_resources</toplevel><creatorcontrib>HEMMI; CHRISTIAN O</creatorcontrib><creatorcontrib>HAYES; WILLIAM F</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>HEMMI; CHRISTIAN O</au><au>HAYES; WILLIAM F</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Amplitude modulation scanning antenna system</title><date>1976-11-23</date><risdate>1976</risdate><abstract>An antenna system forming a cluster of closely spaced beams filling a desired angular scan sector is disclosed. A transmit signal amplitude applied to each beam is modulated as a function of time to form a composite beam which scans smoothly across the scan sector. The RF transmit signal is initially split into a plurality of equal amplitude signals and fed to a plurality of attenuators by power dividers for selective amplitude modulation of the RF signals. The amplitude modulating signals are supplied the attenuator by a digital controller which also supplies switch control signals to selectively switch amplitude modulating transmit signals of varying amplitude to selected feed elements of an array of radiating elements in a time sequence for feeding an antenna reflector.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | ANALOGOUS ARRANGEMENTS USING OTHER WAVES ANTENNAS, i.e. RADIO AERIALS BASIC ELECTRIC ELEMENTS DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRICITY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING |
| title | Amplitude modulation scanning antenna system |
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