EP1045470B1 - Mehrkreisiges Bandfilter aus Topfkreisen - Google Patents
Mehrkreisiges Bandfilter aus Topfkreisen Download PDFInfo
- Publication number
- EP1045470B1 EP1045470B1 EP20000103911 EP00103911A EP1045470B1 EP 1045470 B1 EP1045470 B1 EP 1045470B1 EP 20000103911 EP20000103911 EP 20000103911 EP 00103911 A EP00103911 A EP 00103911A EP 1045470 B1 EP1045470 B1 EP 1045470B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- negative feedback
- coupled
- loop
- resonators
- circles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
- H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
Definitions
- the invention relates to a multi-circuit band filter coupled circles, of which at least two HF circles not consecutive in terms of HF over one Coupling pipe section dipping into both pot circles are.
- Such band filters are known. Through the negative feedback Distribute from HF circles not consecutive pot circles the edges of the transmission curve and increases thus the selectivity of the band filter. You take in Buy that the filter's pass curve in the stop band too has lower and higher frequencies attenuation minima (so-called CAUER characteristic), while the transmission curve non-negative band filter to the bottom and the a monotonically increasing damping curve towards the upper blocking area (TSCHEBYSCHEFF characteristic) has.
- negative feedback band filters are the counter-circles to be coupled via a coaxial Line piece connected, the inner conductor for decoupling and for coupling the HF in the two connected pot circles forms an inductive loop into the short-short circuit or high current zone of the relevant pot circle dips.
- the degree of negative feedback is determined by the size of the determines the respective loop area, because the larger this the larger the magnetic field enclosed by the loop and thus the amplitude of the coupled wave.
- the mechanical length of the coaxial cable chosen so that its electrical length equal to ⁇ / 2 or an odd number Multiples of it is.
- Such negative feedback bandpass filters are however not usable for higher HF powers, because because the coaxial cable goes through the loops at its beginning and its end is short-circuited, forms along the Cable a standing wave, so that on the cable At least one point creates a pronounced current maximum.
- DE-A-2 161 792 discloses a multi-circuit band filter consisting of coupled pot circles, of which two HF circles which are not successive in terms of HF are mutually coupled via a line piece immersed in both pot circles (capacitive pin couplings c 1.4 and c 4.7 ), and Pot circles are arranged so that at least the pot circles to be coupled adjoin each other.
- EP-A-101 369 is a multi-circuit cavity filter with dielectric resonators and one Negative feedback in the form of a line piece is known, which has a slot in a partition engages and causes an inductive and capacitive coupling at the same time.
- the invention has for its object a band filter type mentioned at the beginning with a high-performance negative feedback to provide.
- the immersion depth of the pipe section in the both pot circles are adjustable. On the one hand, this enables the setting of the degree of negative feedback, on the other hand the simple change in the degree of negative feedback after a change the frequency tuning of the filter.
- the This proposal has the further advantage that the Amounts of inductive and capacitive coupling in coordination the filter to another frequency in the same way to change. For example, if the filter is known per se Way tuned to a lower center frequency the negative feedback of the relevant pot circles is constant The area in the one circle of the pot must remain immersing loop can be enlarged. this happens by increasing the immersion depth of the pipe section. With the one causing the capacitive coupling is also shifted Stamp in the other circle. Because at the same time the immersion depth of the inner conductor of this pot circle enlarged to tune to the desired, lower frequency capacitive coupling remains constant. The proposed negative feedback is therefore over a wide range Frequency range effective.
- the band filter comprises six pot circles in the form of resonators A1 to A6 in a U-shaped arrangement.
- the HF is over the Connection 1 coupled into the first resonator A1 and via the connection 2 is coupled out of the resonator A6.
- RF- successive resonators are known per se Way over bridges 3 to be seen only in Fig. 2 with each other coupled, their immersion depth in the respective resonators is adjustable for setting the degree of coupling and the can be fixed using locking screws 4. Also the immersion depth the inner resonator is for frequency tuning adjustable.
- the resonators A2 and A5 are according to the present proposal HF-fed back. To do this, dive into the resonator A2 a line piece 21, one hand in the Short circuit or high current zone near the wall in the resonator A2 forms a line loop and on the other hand by one Slot 41 in the common partition 40 of these two Is passed through resonators and in the resonator A5 in a stamp 22 ends.
- This arrangement turns the Resonator A2 RF energy inductively coupled and capacitive and therefore with a phase rotation of 180 ° to achieve the desired negative feedback is coupled into the resonator A5.
- the immersion depth of the line piece 21 is by means of the rod 23 changeable. At the set immersion depth is the pipe section through the locking screw 24 fixable.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Description
- Figur 1
- das Bandfilter im Schnitt längs der Linie A-A in Fig. 2 und
- Figur 2
- eine Aufsicht auf das Bandfilter.
Claims (1)
- Mehrkreisiges Bandfilter aus miteinander gekoppelten Topfkreisen (A1 bis A6), von denen mindestens zwei HF-mäßig nicht aufeinanderfolgende Topfkreise (A2, A5) über ein in beide Topfkreise eintauchendes Leitungsstück (21) gegengekoppelt sind, wobei die Topfkreise (A1 bis A6) so angeordnet sind, daß zumindest die gegenzukoppelnden Topfkreise (A2, A5) aneinandergrenzen, dadurch gekennzeichnet daß das Leitungsstück (21) als in den einen Topfkreis eintauchende Schleife, die durch einen in der Trennwand (40) der aneinandergrenzenden Topfkreise ausgebildeten Schlitz (41) hindurch mit einem Stempel (22) in dem anderen Topfkreis (A5) verbunden ist, ausgebildet ist, und daß die Eintauchtiefe des die Schleife und den Stempel umfassenden Leitungsstücks (21) veränderbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19916605A DE19916605C1 (de) | 1999-04-13 | 1999-04-13 | Mehrkreisiges Bandfilter aus Topfkreisen |
DE19916605 | 1999-04-13 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1045470A2 EP1045470A2 (de) | 2000-10-18 |
EP1045470A3 EP1045470A3 (de) | 2001-11-07 |
EP1045470B1 true EP1045470B1 (de) | 2004-03-03 |
Family
ID=7904372
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20000103911 Expired - Lifetime EP1045470B1 (de) | 1999-04-13 | 2000-02-24 | Mehrkreisiges Bandfilter aus Topfkreisen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1045470B1 (de) |
DE (1) | DE19916605C1 (de) |
ES (1) | ES2215503T3 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8143973B2 (en) * | 2007-12-27 | 2012-03-27 | Pl Technologies Ag | Cavity filter coupling system |
DE102011016487A1 (de) | 2011-04-08 | 2012-10-11 | Spinner Gmbh | HF-Filteranordnung sowie Verfahren zur Variation einer elektromagnetischen Koppelstärke zwischen zwei Topfkreis-Resonatoren |
DE102013020428A1 (de) | 2013-12-05 | 2015-06-11 | Kathrein-Werke Kg | Hochfrequenzfilter in koaxialer Bauweise |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2325401C3 (de) * | 1973-05-18 | 1985-05-15 | Georg Dr.-Ing. 8152 Feldkirchen-Westerham Spinner | Koppelanordnung zwischen Hochfrequenzkreisen |
FR2531815B1 (fr) * | 1982-08-10 | 1985-08-02 | Thomson Csf | Filtre passe-bande a resonateurs dielectriques, presentant un couplage negatif entre resonateurs |
DE3329057A1 (de) * | 1983-08-11 | 1985-02-28 | Siemens AG, 1000 Berlin und 8000 München | Koaxialleitungs-, kammleitungs- oder interdigitalfilter mit wenigstens vier resonatoren |
US4890078A (en) * | 1988-04-12 | 1989-12-26 | Phase Devices Limited | Diplexer |
-
1999
- 1999-04-13 DE DE19916605A patent/DE19916605C1/de not_active Expired - Fee Related
-
2000
- 2000-02-24 EP EP20000103911 patent/EP1045470B1/de not_active Expired - Lifetime
- 2000-02-24 ES ES00103911T patent/ES2215503T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE19916605C1 (de) | 2001-01-18 |
EP1045470A2 (de) | 2000-10-18 |
ES2215503T3 (es) | 2004-10-16 |
EP1045470A3 (de) | 2001-11-07 |
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