Method and arrangement for tuning a combiner filter
PCT No. PCT/FI93/00564 Sec. 371 Date Aug. 29, 1995 Sec. 102(e) Date Aug. 29, 1995 PCT Filed Dec. 29, 1993 PCT Pub. No. WO94/16495 PCT Pub. Date Jul. 21, 1994Tuning a combiner filter, which includes two separate tuning modes: coarse adjustment applied when the combiner is taken into use by utilizing...
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| creator | PEKKA HEIKKILA MARTTI KAINULAINEN JUHA VASANOJA JUKKA KYLLONEN SEPPO NOUSIAINEN ESA NIEMITALO EERO KOUKKARI TEUVO HAUKIPURO HARRI TIKKA |
| description | PCT No. PCT/FI93/00564 Sec. 371 Date Aug. 29, 1995 Sec. 102(e) Date Aug. 29, 1995 PCT Filed Dec. 29, 1993 PCT Pub. No. WO94/16495 PCT Pub. Date Jul. 21, 1994Tuning a combiner filter, which includes two separate tuning modes: coarse adjustment applied when the combiner is taken into use by utilizing a measuring branch for forward power and a coarse measuring branch for reflected power; and fine adjustment applied in continuous operation by utilizing the measuring branch for forward power and a fine measuring branch for reflected power. The two-stage adjustment decreases the mutual interference of the filters during tuning. The correct tuning frequency of the combiner filter is obtained as the average point of the reversing points obtained in the adjustment process, the filter being driven to the average position. This so-called positional average tuning has two advantages: the effect of noise present in the power measuring line is reduced, and the tuning error caused by the termination of the dynamics of the A/D converter positioned after the detector at low power levels and good combiner filter settings is diminished. Power measurements are made frequency-selective by mixing. |
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No. WO94/16495 PCT Pub. Date Jul. 21, 1994Tuning a combiner filter, which includes two separate tuning modes: coarse adjustment applied when the combiner is taken into use by utilizing a measuring branch for forward power and a coarse measuring branch for reflected power; and fine adjustment applied in continuous operation by utilizing the measuring branch for forward power and a fine measuring branch for reflected power. The two-stage adjustment decreases the mutual interference of the filters during tuning. The correct tuning frequency of the combiner filter is obtained as the average point of the reversing points obtained in the adjustment process, the filter being driven to the average position. This so-called positional average tuning has two advantages: the effect of noise present in the power measuring line is reduced, and the tuning error caused by the termination of the dynamics of the A/D converter positioned after the detector at low power levels and good combiner filter settings is diminished. Power measurements are made frequency-selective by mixing.</description><edition>5</edition><language>eng</language><subject>BASIC ELECTRIC ELEMENTS ; BASIC ELECTRONIC CIRCUITRY ; ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS ; RESONATORS ; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE ; TRANSMISSION ; WAVEGUIDES</subject><creationdate>1994</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=19940815&DB=EPODOC&CC=AU&NR=5701194A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19940815&DB=EPODOC&CC=AU&NR=5701194A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>PEKKA HEIKKILA</creatorcontrib><creatorcontrib>MARTTI KAINULAINEN</creatorcontrib><creatorcontrib>JUHA VASANOJA</creatorcontrib><creatorcontrib>JUKKA KYLLONEN</creatorcontrib><creatorcontrib>SEPPO NOUSIAINEN</creatorcontrib><creatorcontrib>ESA NIEMITALO</creatorcontrib><creatorcontrib>EERO KOUKKARI</creatorcontrib><creatorcontrib>TEUVO HAUKIPURO</creatorcontrib><creatorcontrib>HARRI TIKKA</creatorcontrib><title>Method and arrangement for tuning a combiner filter</title><description>PCT No. PCT/FI93/00564 Sec. 371 Date Aug. 29, 1995 Sec. 102(e) Date Aug. 29, 1995 PCT Filed Dec. 29, 1993 PCT Pub. 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This so-called positional average tuning has two advantages: the effect of noise present in the power measuring line is reduced, and the tuning error caused by the termination of the dynamics of the A/D converter positioned after the detector at low power levels and good combiner filter settings is diminished. 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No. WO94/16495 PCT Pub. Date Jul. 21, 1994Tuning a combiner filter, which includes two separate tuning modes: coarse adjustment applied when the combiner is taken into use by utilizing a measuring branch for forward power and a coarse measuring branch for reflected power; and fine adjustment applied in continuous operation by utilizing the measuring branch for forward power and a fine measuring branch for reflected power. The two-stage adjustment decreases the mutual interference of the filters during tuning. The correct tuning frequency of the combiner filter is obtained as the average point of the reversing points obtained in the adjustment process, the filter being driven to the average position. This so-called positional average tuning has two advantages: the effect of noise present in the power measuring line is reduced, and the tuning error caused by the termination of the dynamics of the A/D converter positioned after the detector at low power levels and good combiner filter settings is diminished. Power measurements are made frequency-selective by mixing.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| subjects | BASIC ELECTRIC ELEMENTS BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS RESONATORS RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE TRANSMISSION WAVEGUIDES |
| title | Method and arrangement for tuning a combiner filter |
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