EP3120409A1

EP3120409A1 - Balun, in particular dc and/or audio frequency output to an hf path using a balun

Info

Publication number: EP3120409A1
Application number: EP15708728.9A
Authority: EP
Inventors: Ingo Mayr
Original assignee: Kathrein Austria GmbH
Current assignee: Telefonaktiebolaget LM Ericsson AB
Priority date: 2014-03-20
Filing date: 2015-02-26
Publication date: 2017-01-25
Anticipated expiration: 2035-02-26
Also published as: WO2015139812A1; ES2753354T8; EP3120409B1; DE102014004008A1; ES2753354T3

Abstract

The invention relates to an improved balun arrangement, which is characterized among others by the following features: - a second balun (ST2) is arranged in the interior (ST-19) of the first balun (ST1), - the second balun (ST2) has a balun base (ST-15) at one end face of the second balun and an opening face (ST-27) at the opposite end face, - the second balun (ST2) is arranged in the interior (ST-19) of the first balun such that the second balun base (ST-15) and opening face (ST-27) are rotated by 180° relative to the first balun (ST1), - a lateral spacer (SA) which runs transversely or perpendicularly to the central axis (ST-07) is formed between the second balun outer conductor (ST-25) and the first balun outer conductor (ST-05), wherein the second or inner balun (ST2) is galvanically separated from the first balun (ST1) by means of said lateral spacer, and - the first and the second balun (ST1, ST2) are connected solely via a galvanic connection between the base (ST-29) of the second balun (ST2) and the inner conductor (ST-03) which passes through the base (ST-29) of the second balun (ST2).

Description

Locking pot, in particular DC and / or coupling on an RF path using e Sperrtopfes

The invention relates to a locking pot according to the preamble of claim 1 and a DC and / or LF outcoupling on an RF path using a barrier pot.

In particular, in the reception and transmission technology, it is often common on a reception and / or transmission line not only to send or to be received high-frequency signals (hereinafter referred to as short RF signals), but on this route also in the switched antennas, Amplifiers, preamplifiers, etc. integrated, active components in addition to DC supply to the power supply and / or at least also low-frequency (NF) AC voltages (for example, pilot tones) to control and regulate the components over the route. However, additional devices provided on the reception or transmission paths, such as in particular high-frequency filters, are often unable to pass, for example, the high-frequency signals required for the power supply additionally DC voltage and / or low-frequency AC voltage, for example for the mentioned pilot tones, and transfer. Because the problem is that such DC voltage and / or LF outcouplings must be designed so that they do not change the properties of the filter as possible. This, in turn, only works when the bypasses to the RF lines are decoupled (which is often done using a coil or a λ / 4 line) and consequently only extremely high-attenuation radio-frequency signals can be transmitted on the decoupling path. A conventional technique therefore involves a bypass in the form of a decoupling or bypass path, via which one coupled on the high-frequency path with transmitted DC voltage or a low-frequency AC voltage and on another

Place can be coupled into the high-frequency link again. As a result, for example, provided with a high-frequency filter or a duplexer high-frequency link is bypassed or bridged.

For this purpose, solutions were hitherto known in which, for example, a coil or a λ / 4 line or one or more printed circuit boards were used with multi-stage Tiefpassfil ^¬ tern, which were usually discrete.

For reasons of space, however, it has also been proposed to use a λ / 4 line together with so-called to use guide capacitors, in which on the bypass path in the coupling or decoupling of the λ / 4-line a conduit surrounding dielectric was provided, which was covered by a cylindrical sleeve to form the capacitor, which in a corresponding recess, For example, in a housing wall of a high-frequency filter or duplexer, had to be soldered. However, there were several disadvantages associated with this technique.

An improved DC and / or low-frequency bypass for a high-frequency link, in particular for high-frequency filters, duplex or other electrical / electronic devices, has become known, for example, from EP 1 932 205 B1. This known solution is characterized by the fact that the corresponding DC voltage and / or low-frequency voltage extraction and bypass is much easier to assemble than conventional solutions and can be dismantled in the event of repair work. In this case, a locking pot is used, which is housed in a corresponding recess of a housing. To improve the direct voltage and / or low-frequency decoupling from the high-frequency path and to suppress high frequency signals at this decoupling point is further provided that the locking pot used is housed in a corresponding hole in a grounded housing. As a result, a capacitor is formed between the outer wall of the blocking pot and the inner wall of the housing lying on the ground, which additionally acts as a low-pass filter. A solution comparable to that extent can also be taken from US Pat. No. 5,856,767. In this case, a spur line is used with respect to a coaxial signal path, wherein the outer conductor of the spur line is galvanically connected to the outer conductor of the coaxial high-frequency path and is grounded. The end of the stub is closed by a plate also lying on ground, which has a bore through which the inner conductor of the stub is performed to the outside and separated by a dielectric sleeve of the outer conductor of the stub. In the interior of the coaxial stub a turntable is also in turn arranged, which is formed by the axially through the locking pot through extended inner conductor stub at the passage bore of the end plate of the outer conductor of the stub also a capacity that forms a low pass.

It is an object of the present invention to provide an improved locking cup which has further improved decoupling properties compared with a high-frequency branch (HF branch) and a corresponding DC voltage and / or LF decoupling arrangement using such a block according to the invention Entkopplungseigenschaften having blocking pot.

The object is achieved according to the invention with respect to the locking pot according to the claim 1 and with respect to the decoupling arrangement according to the features specified in claim 11. Advantageous embodiments of the invention are specified in the subclaims. The solution according to the invention is characterized in that an additional second locking pot is provided in an open locking pot, which usually comprises a hollow cylindrical wall, a bottom connected thereto and an inner conductor running axially from the bottom to the hollow cylindrical wall, which is arranged inside the first locking pot , The further or second locking pot is arranged with the reverse orientation in the first locking pot, that is arranged aligned with its open end side immediately adjacent to the bottom of the first locking pot.

In other words, the invention provides that in an outer barrier pot, a smaller diameter inner baffle is mounted in an opposite orientation, e.g. is soldered. In this case, the inner locking pot is arranged at least a small distance from the outer locking pot, so that the outer or peripheral walls, i. As a rule, the hollow-cylindrical outer conductors are not in galvanic contact. The open edge of the inner locking pot is arranged at least a short distance from the bottom of the first locking pot. Usually, the length of the inner locking pot is less than the total height of the outer locking pot, so that the bottom of the inner locking pot ends below the opening plane of the outer locking pot. The inner locking pot is penetrated by the inner conductor. Preferably, the bottom of the inner locking pot is soldered to the inner conductor, whereby the inner locking pot can ultimately be maintained.

By the distance of the inner locking pot to the outer locking pot and / or by the appropriate vote The length of the inner locking pot in relation to the outer locking pot can ultimately the frequency range in which the inner locking pot to work, influenced and / or adjusted.

If the blocking pot according to the invention is used within the framework of a decoupling arrangement according to the invention in which, for example, the blocking pot is placed in the useful band of an HF filter, a considerable improvement in decoupling can thereby be achieved. In this case, in addition, a complementary provided and connected to the blocking pot in series capacitor can be used (as is generally known in the prior art). Because a capacitor connected in series has already been used in the prior art to improve the decoupling. However, this decoupling using the additional capacitor is further improved by using the Doppelsperropfes invention.

To improve the centering may be used, for example, at the upper end of the inner locking pot in addition a dielectric material which serves to center the inner locking pot in relation to the outer locking pot. However, this is not absolutely necessary.

In addition, the inner baffle may be coated with an electrically insulating material to be centered in the outer baffle. Also, a galvanic bond between the inner and outer locking pot is avoided. The connection of the inner locking pot on the inner conductor of the outer locking pot is preferably carried out by means of soldering. However, it is also possible within the scope of the invention that a plug-in and / or press connection takes place, for example, between the bottom of the inner blocking pot and the inner conductor of the outer blocking pot passing through the bottom of the inner blocking pot. For the sake of completeness, it should also be mentioned that, instead of the previous galvanic connection possibilities, a galvanic connection can also be realized by, for example, connecting the inner blocking pot to the associated inner conductor by using an electrically conductive adhesive. The invention will be explained in more detail with reference to embodiments. In detail:

Figure 1: a schematic axial section through a locking pot according to the invention;

Figure 2 is a schematic plan view along the section line I-I in Figure 1;

FIG. 3 shows a schematic representation of a duplexer with two HF branches, in each of which a bypass path is provided for DC and / or low-frequency bypassing and decoupling; Figure 4 is a schematic axial section through a first embodiment of a bypass route; FIG. 5: a plan view of the exemplary embodiment according to FIG. 4;

FIG. 6: a spatial representation of the exemplary embodiment according to FIGS. 4 and 5;

FIG. 7 shows a schematic axial section through a further exemplary embodiment in the form of only one decoupling path;

FIG. 8 shows a corresponding plan view of the exemplary embodiment according to FIG. 7; and

FIG. 9 is a perspective view of the embodiment of FIG. 7 and FIG. 8.

FIGS. 1 and 2 show a locking pot arrangement according to the invention, specifically with a first blocking pot ST1 and a second blocking pot ST2.

The blocking pot is installed in an electrically conductive housing 17 in a recess 19a formed there. In the embodiment shown, the locking cup is cylindrical, i. designed hollow cylindrical, which is not mandatory. Likewise, the housing wall 17a of the housing 17, unlike the representation according to FIG. 1, can be made much thinner, ie have a material thickness which corresponds or can correspond, for example, to the hollow cylindrical wall of the first or second locking pot ST1 or ST2.

In the recess 19a is a preferably applied to the inner wall 19c of the recess 19a insulation Layer ST-01 inserted, which is also formed hollow cylindrical in hollow cylindrical configuration of the recess 19a. It comprises at least bottom sections ST-02, for example an annular bottom section ST-02, which ensures that the blocking pot STl inserted into this insulating layer ST-01 both with respect to its peripheral surface and its bottom surface (preferably formed of or coated with an electrically conductive material is) is electrically isolated from the likewise electrically conductive housing 17.

In the interior ST- 03 of the insulating material ST-01, the inventive locking pot assembly is used with the first and second locking pot STL, ST2.

The first or outer lock pot ST1 comprises, as usual, a lock pot outer conductor ST-05, which is preferably formed in a hollow body, i. in the embodiment shown hollow cylinder-shaped, in relation to a central axis ST-07 passing through the locking pot arrangement.

The first and second locking pot, which preferably also made of electrically conductive material, in particular metal or at least - if they are formed from a dielectric - are coated with a corresponding conductive layer are constructed so that the locking pot outer conductor ST-05 in the Lock pot base ST-09 preferably integrally merges. Preferably, starting in the center from the bottom ST-09, the blocking pot inner conductor ST-11 runs parallel and preferably concentric with the central axis ST-07. As will be explained later, the first or outer locking pot STl is electrically connected to a feed point ST-13 at its upper peripheral edge ST- 15, ie at its opening side ST- 17 with an input line 7, whereas the free end of the inner conductor ST-L with an output or connecting line 9 or 33 (which will be discussed later) is electrically connected.

In the exemplary embodiment shown, a second insulating layer ST-21, which also comprises a bottom section ST-21b in addition to a peripheral section ST-21a, is now preferably inserted in the interior ST-19 of the first blocking pot ST1 in its bottom region.

The opening side ST-27 of the second blocking pot ST2, which is aligned with its opening direction in the opposite direction to the first blocking pot ST1 and is arranged within the first blocking pot, ie in the interior ST-19 of the first blocking pot ST1, rests thereon. The inner conductor ST-11 of the first locking pot STl passes through the bottom ST-29 of the second locking pot (preferably in the form of a formed in the bottom ST-29 of the second locking pot ST2 bore ST-30). The bottom of the second blocking pot ST-19 is preferably connected by means of a soldering ST-22 on the overhead outer side (which is easily accessible for mounting purposes) with the locking pot inner conductor ST-11 electrically-galvanically connected. In itself, this electrical-galvanic connection may already be sufficient to electrically connect the second blocking pot ST2 not only to the first blocking pot ST1 but also to hold it mechanically. The mentioned second insulating layer ST-21, however, serves as an additional holding and fixing device to also ensure that the first and second locking pot are galvanically separated from each other, so are kept at a distance. This also makes it possible that the second locking pot can not necessarily be held by soldering, but for example also by a mechanical, non-positive and / or positive connection, for example also by an electrically conductive adhesive which may have some elasticity (instead of the one mentioned above) Soldering ST-22).

As can be seen from the drawings, the hollow body-shaped wall, i. the baffle outer conductor ST-25, whose cross-sectional shape preferably corresponds to the cross-sectional shape of the Sperrtopf-Außenleiter ST-05, a dimensioning on, which is smaller than the outer locking pot ST1. In other words, the dimensioning of the two locking pots ST1, ST2 is selected so that between the first inner or second Sperrtopf- outer conductor ST-25 and the outer potting outer conductor ST- 05 to the central axis ST-07 and the inner conductor ST-11 transversely and in particular vertically extending distance, in particular lateral or radial distance SA is formed.

Furthermore, the inner or second locking pot ST2 has an axial length AL2 which is preferably smaller than the one axial length ALI of the first locking pot. The opening edge ST-35 of the second locking pot ST2 lies at a distance XA in front of the bottom ST-09 of the first locking pot ST1.

By the mentioned distance SA between the wall of the inner and outer locking pot ST2, ST1 and / or by the axial length AL2 of the inner locking pot ST2 in relation to the axial length ALI of the outer or first locking pot ST1 can ultimately change or adjust the frequency range accordingly in which the said Sperrpol arrangement to work with two Sperrpolen. If you put the Sperrpol in the useful band of the filter, so can thereby achieve a significant improvement in the decoupling. This solution always works, regardless of whether an additional capacitor is connected in series with the Sperrpol arrangement or not to further increase the decoupling.

Hereinafter, the further construction of the inventive Sperrtopf arrangement using two nested locking pots will be discussed, if they are used in the context of a DC voltage and / or example low-frequency decoupling arrangement for RF links, as is fundamentally known from EP 1 932 205 B1, to the disclosure of which reference is made.

For this purpose, reference is made below to the further figures 3 ff. FIG. 1 shows a schematic diagram of a block diagram for a duplexer comprising two bandpass filters 3 and 5, for example a first bandpass of 806 MHz to 960 MHz and, for example, a second bandpass of 1,710 MHz to 2,170 MHz.

A duplexer formed in this way thus has, for example, two input-side HF connections and / or corresponding connection connections 107, namely 107a and 107b, and a third output-side HF connection merging the two band-pass paths and / or a corresponding connection connection 109, at which usually one Antenna is connected. In the case of a corresponding duplexer for a transmitting or receiving systems, the mentioned input-side HF connections 107a, 107b would serve as transmit inputs and the third RF connection 109 as transmit output, whereas in the case of reception the third RF connection 109 would serve as receive input and the other two ports 107a and 107b could be referred to as receive outputs.

It can also be seen from the schematic block diagram that a NF and DC bypass 13 is provided for each bandpass 3 and 5, which is referred to below as a bypass or bypass path or partially also as a decoupling section 13. On this bypass or decoupling path 13 so on the one hand a DC power supply for various devices, amplifiers, etc. guaranteed and / or eg a low-frequency signal transmission, for example in the form of so-called pilot tones, be possible to control and regulate individual components be needed (for example, in the DiSEq technology). The bypass or decoupling path 13 comprises, in addition to a decoupling or bypass circuit 13 ', an input line 7 on the input side, ie an input line 7a or 7b in the embodiment shown, and an output line 9 on the output side, ie in the exemplary embodiment shown an output line 9a and 9b, respectively. In this case, therefore, the input lines 7 at a connection or branching point 117 with the RF path 3 and the output lines 9 at a connection point 117 'with the respective RF path 3 and 5 are electrically connected, in the embodiment shown electrically galvanic. Such a bypass or decoupling section 13 is shown in more detail with reference to FIGS. 4 to 6, as is known in principle from EP 1 932 205 B1. It can be seen on the one hand that the bypass path 13 comprises a housing 17 (which is grounded), which consists of electrically conductive material, usually a corresponding metal alloy or at least comprises a conductive outer shell or coating, for example Plastic is made. Usually, a housing 17 is provided in which the high-frequency path in the form of at least one or more bandpasses 3, 5 is realized with. In the embodiment shown, only one housing 17 is shown for the sake of simplicity and clarity, which includes the bypass section 13 and not also the additional radio-frequency link. For example, to form a high-frequency filter, duplexer, etc. with urafasst.

In the exemplary embodiment shown, two hollow-cylindrical bores or recesses 19a and 19b are thus introduced into the housing 17 from one side. As a result, two hollow-cylindrical capacitor walls are formed, which are virtually the first plates, that is to say the first capacitor halves 20a and 20b of a capacitor 27a or 27b described below in more detail.

In this hollow-cylindrical bore 19a or 19b, in each case a dielectric ST-01, i. 23a and 23b inserted, for example in the form of a cylindrical dielectric, which may be formed as a plastic injection molded part. This is preferably cup-shaped and can be used up to the lower bottom 21a and 21b in the hollow cylindrical holes 19a and 19b.

Into this thus formed dielectric ST-01 or 23a, 23b is then an electrically conductive hollow cylinder ST- 05, i. Inserted 25a and 25b, which forms the second plate, so the second capacitor half 200a and 200b of a cylindrical capacitor 27a or 27b thus formed.

In the embodiment shown, the inner second halves of the cylindrical capacitors 27a,

27b not designed as a pure hollow cylinder, but as cylinder pots 29a and 29b, namely in coaxial design with a respective associated inner conductor 31a and 31, which extend from the respective pot bottom ST-09, ie 30a and 30b and extend in the embodiment shown to the respective upper edge ST-15, ie 32a and 32b of the associated cylinder pot 29a, 29b.

As can be seen from Figures 4 to 6, the cylinder heads 29a, 29b, which are provided with lateral offset in the housing 1 in corresponding holes 19a, 19b, the same design. Both inner conductors ST-11, i. 31a, 31b, so both cylinder pots 29a, 29b are interconnected via a, hereinafter also partially referred to as a connecting line 33 line 33. The length of this line can be arbitrary. The input line 7, 7a thus forms an input-side HF connection connection which branches off from a connection or branching point 117 of the HF path 3 shown in FIG. 3, thereby leading to the hollow cylinder 25a of the first cylinder pot 29a and electrically therewith is connected, preferably by soft soldering (the point where the connection is made by soldering is provided with the reference numeral 36). For this purpose, the input line 7 or the HF connection at the upper edge 32a is soldered opposite the pot bottom 30a of the cylinder cup 29a.

The input line 7, 7a in this case represents a transmission line whose length is preferably λ / 4. The input line 7a thus preferably has a length which corresponds to the mean wavelength of a frequency band to be transmitted on the associated RF link. At least λ is chosen such that the value for this corresponds to a wavelength for a frequency, which lies within the frequency band to be transmitted on the high-frequency link.

Likewise, an output line 9 'representing the output-side HF connection, that is to say the output-side HF connection connection 9, is soldered again at the upper edge 29b of the cylinder pot 29b (preferably likewise again by soft soldering 36) which is connected at the connecting end 117' at the opposite end of the cylinder pot 29b. is connected to the associated RF link 3 or 5. This RF connection 9 and the corresponding output line 9 in this case has a length which corresponds to λ / 4, wherein λ preferably again corresponds to the mean wavelength of the frequency band, which is to be transmitted on the associated RF link. At least λ should be chosen so that the value for this purpose corresponds to a wavelength for a frequency that is within a frequency band to be transmitted on the RF link.

In other words, therefore, the double locking pot arrangement with the first and second blocking pot ST1 and ST2 is also realized in the decoupling path according to FIGS. 4 to 7, specifically with a structure as explained in principle with reference to FIGS. 1 and 2.

In the embodiment shown, it can be seen that on the housing 17 on the upwardly facing housing wall 17 'in each case one, to the front side opposite boundary portions 17 "of the housing 17 recess 217 is provided through which the input and the output line 7, 9th from the upper edge 32a and 32b of Both cylinder pots 29a and 29b, which are designed as locking pots 127a and 127b, can be guided out, for example, parallel to the upper boundary wall 17 'of the housing 17. Because the axial bores 19a and 19b are inserted so deep in the housing 17 that the locking pots 127a, 127b in full axial length dive into these holes and with their upper edge 32a and 32b, the upper boundary wall 17 'of the housing do not protrude upwards. Thus, the input and the output line 7 and 9 could be led out laterally below the upper level of the boundary wall 17 'of the housing. Finally, it can also be seen in particular from FIGS. 4 and 5 that the connecting line 33 is laid in a housing recess 219 (FIG. 6) which connects the two cylindrical bores 19a and 19b in the region of the upper boundary wall 17 'of the housing 17 in a slot shape, so that this line 33 does not project beyond the upper boundary plane 17 'of the housing. However, the last-mentioned measures can also be designed differently.

By means of a bypass line or bypass 13 thus formed, a DC voltage for the power supply and / or a low-frequency (NF) AC voltage (for example pilot tones) can therefore be transmitted parallel to a high-frequency path (for example bandpass path 3, 5 in FIG. 3) , In this case, the hollow cylindrical condenser wall 20a or 20b forms, for example, the respectively first "plate" of a condenser 27a or 27b thus formed. The second "plate" of the capacitor is formed by the electrically conductive hollow cylinder 25a or 25b inserted into the hollow cylindrical bores 19a, 19b, whereby both "plates" are formed by the hollow plate. Dielectric 23a, 23b are electrically galvanically separated from each other.

In this case, the dielectric 23a, 23b as well as each inserted therein, designed in the manner of a cylinder pot 29a, 29b hollow cylinder 25a, 25b be designed so that they can be inserted into the hollow cylindrical bore 19 to produce a snap and / or snap action , Corresponding snap-action and / or latching devices or at least sufficient clamping measures or devices can therefore be provided and / or formed on the preferably made of plastic dielectric 23a, 23b in interaction with the corresponding recess in the housing.

The mentioned capacitors 27a, 27b form a low pass to generate a high frequency short circuit with the conductive housing 17, which is usually grounded. Nevertheless, the capacitors 27a, 27b, which are referred to as high-frequency short-circuiting, are not yet sufficient for optimal decoupling from the RF branch, since an excessively large residual signal or excessive residual signal intensity would still be transmitted via this bypass path. In order to further improve the decoupling, a blocking pot 127a, 127b is respectively integrated into the capacitors 27a, 27b according to the described exemplary embodiment. This blocking pot 127a, 127b is formed in each case by the cylinder pot 29a, 29b with the associated, concentrically arranged inner conductor 31a, 31b, which is connected to the respective bottom 30a, 30b of the relevant cylinder pot 29a, 29b. The connecting line 7 or 9 is then directly on this locking pot 127a and 127b connected and thus fulfills the decoupling.

The axial length (especially the axial length inside the cylinder pot and thus the axial length of the inner conductor 31a, 31b) is preferably usually proportional to 1 / VeR l / e _R and the other factor K / 4, where s _{R is} the corresponding Dielectric constant of the inner dielectric used is that in the embodiment shown preferably consists of air but does not have to consist of air. In this case, another dielectric may also be inserted, λ preferably represents the mean wavelength of the frequency band to be transmitted in the HF ring. By using the blocking pot 127a, 127b thus formed, a short circuit occurs via the capacitor 27a, 27b thus formed generated in the bottom region 20a, 20b of the locking pot, said short circuit is transferred to the open end of the locking pot 127a, 127b in an idle (λ / 4 electrical length). However, the axial length of the locking pots or the inner conductor of the locking pots need not necessarily be λ / 4, but may also deviate from it and have completely different values. Decision-relevant is the length of the input line 7, 7a and 7b as well as the length of the output line 9, ie in the embodiment shown in FIG 3 of the output line 9a and 9b. The construction shown thus ensures that, for example, the short circuit at the first blocking pot 127a, ie the short circuit at the connection point of the so-called λ / 4 input line with the blocking pot 127a (at the soft soldering point 36) into an open circuit at the connection point 117 to the HF 3 is transformed, so that thereby the RF filter by the decoupling or bypass path undergoes no influence or change. The same applies to the second λ / 4 Αη- end line 9, in which also the short circuit on the locking pot 127a (ie at the junction of the λ / 4 line 9 to the blocking pot 127b in an idle at the junction 117 'to the RF path is transformed so that here the local RF branch undergoes no adverse effect by the decoupling or bypass route.

Since a DC voltage and / or HF bypass has been described in the described exemplary embodiment according to FIG. 3 and FIGS. 4 to 6, ie a second connection point 117 'with the associated HF branch is provided, the embodiment is symmetrical in the embodiment shown , The first of the two symmetrical halves according to the embodiment of Figures 4 to 6 consists of a Auskoppel- distance, namely in the illustrated embodiment of the connection point 117, starting in the form of the following λ / 4-line 7, which leads to the cylinder pot 29 a, ie the Locking pot 127a. The second half of the symmetrical structure is based on a connection point 117 'of the HF path, via a downstream λ / 4 line 9, 9a, which leads to the downstream cylinder pot 29b, ie to the blocking pot 127b. Both locking devices fe are then connected to each other via the mentioned line 33. The basically symmetrical structure, at least in functional terms, is indicated with respect to the plane of symmetry S in FIG.

However, if no bypass route (in which a coupling to the RF link at both opposite ends 117 or 117 'is provided) but only a Auskoppelstrecke be realized, which is only via a branch point 117 (or 117 ¹ ) connected to the RF link and leads away from this, it would be sufficient if after the branching point 117 and the transformation line, ie the λ / 4 input line 7, a high-frequency short circuit would first follow in the form of a first capacitor 27a in the form of the aforementioned blocking pot 127a, so that then At the free end of the inner conductor 31a, a line 33 could be connected, in which a DC voltage and / or low-frequency signal can be tapped. In other words, only half the device would be necessary, as shown schematically with reference to the figures 7 to 9. With regard to the construction and the description, however, reference is in principle made to the previous exemplary embodiment with reference to FIGS. 1 and 3 to 6.

However, the exemplary embodiment shown in FIGS. 3 to 6 is not a decoupling path, but rather a bypass or bypass path 13, which has a connection to the RF path 3 or 5 at both terminals 7 and 9 Therefore, the structure is symmetrical, so that viewed from each side of the two connection points 117, 117 'from first a first λ / 4-line 7' and 9 ¹ and a locking pot 127 a, 127 b is downstream. At the same time, each short-circuit capacitor 27a, 27b also forms the illustrated blocking pot.

In the embodiments shown has always been spoken by a λ / 4 line 7 and 9, where X should correspond to a frequency within a frequency band, which is transmitted to the parallel high frequency branch. Preferably, λ should correspond to the mean wavelength of the corresponding band transmitted on the radio-frequency branch. However, the advantages according to the invention can be achieved to a sufficient extent even if the length of the connection line 7 or 9 is not exactly X / 4, but deviates therefrom.

A range of λ / 8 to 3λ / 8 and in particular a range of preferably 3A / 16 to 5X / 16 usually still gives sufficient results. In this case, the electrical length L for the transformation line in question can generally be described as follows: L = λ / 4 ± <λ / 8 i. λ / 8 <L <3 λ / 8

= λ / 4 ± <λ / 8 (i.e., λ / 8 <L <3λ / 8)

and in particular L = λ / 4 ± <X / 16 i. 3 X / 16 <L <5 λ / 16

L = λ / 4 + <λ / 16 (ie 3λ / 16 <L <5X / 16) where X is again preferably the mean wavelength of the freewheel to be transmitted in the HF path. quence band or at least one wavelength within this RF frequency band.

In principle, however, the above-mentioned length of this transformation path 7 or 9 can also be extended by K / 2 in order to obtain the same results. The electrical length of the transformation line 7 or 9 can thus generally be described as follows: L = K / 4 + ^η λ / 2 ± <λ / 8

L = λ / 4 + nλ / 2 + <λ / 8

wherein the above formula can also be written as A / 8 + n-X / 2 <L <3λ / 8 + η * λ / 2λ / 8 + n * λ / 2 <L <3λ / 8 + Π * K / 2

and in particular L = λ / 4 + η λ / 2 ± <λ / 16,

L = λ / 4 + nλ / 2 ± <λ / 16,

The above formula may also be written as 3 A / 16 + n - X / 2 <L <5 λ / 16 + η - λ / 2

3Λ / 16 + n ·λ / 2 <L <5X / 16 + n ·λ / 2 wherein the electrical length is preferably L = A / 4 + n A / 2

L * λ / 4 + n λ / 2.

"n" is a natural integer including 0, that is, for example, n = 0, 1, 2, 3, etc., where A is a wavelength and preferably the average wavelength of the high-frequency band transmitted on the high-frequency path.

Finally, it is also pointed out that the connecting lines 7 and 9, which were also referred to as input or output lines 7 and 9, do not necessarily have to be straight, but may for example also be arcuate or in particular in the form of a coil. Again, the length of the coil, so the wire used for the coil, preferably have the above values.

Claims

Claims;

1. Locking pot arrangement with the following features:

the barrier pot arrangement comprises a first blocking pot (ST1) with a hollow body-shaped blocking pot -

Outer conductor (ST-05) which merges at its one end in a bottom (ST-09), wherein inside the first locking pot (ST1) along a central axis (ST-07) a Sperrtopf- inner conductor (ST-11) which is galvanically connected to the stopper bottom (ST-09),

characterized by the following further features:

in the interior (ST-19) of the first locking pot (ST1) a second blocking pot (ST2) is arranged,

- The second locking pot (ST2) has at its one end face a locking pot bottom (ST- 15) and on its opposite end side an opening side (ST-27),

the second locking pot (ST2) is with its locking pot bottom (ST-15) and its opening side (ST-27) to

180 ° twisted to the first locking pot (ST1) arranged in the interior space (ST-19), the second lock pot (ST2) terminates at its axial opening (XA) in front of the bottom (ST-09) of the first lock pot (ST1), between the second lock pot outer wire (ST-25), and its opening edge (ST-25) the first locking pot outer conductor (ST-05) is a transverse or perpendicular to the central axis (ST-07) extending side clearance (SA), about which the second or inner locking pot (ST2) from the first locking pot (ST1) is arranged galvanically isolated, and the first and the second locking pot (ST1, ST2) are connected only via a galvanic connection between the bottom (ST-29) of the second locking pot (ST2) and the inner conductor (ST-03), the bottom (ST-29) of the second Locking pot (ST2) interspersed.

2. Locking pot arrangement according to claim 1, characterized in that between the second locking pot - outer conductor (ST-25) and the first blocking pot outer-conductor (ST-05), a dielectric or insulator (ST-21) is used as a spacer.

3. barrier pot arrangement according to claim 1 or 2, characterized in that between the first locking pot bottom (ST-09) of the first locking pot (ST1) and the opening edge (ST-25) of the second locking pot (ST2) a dielect ^¬ risches Material (ST-21) used as a spacer

4. barrier pot arrangement according to one of claims 1 to 3, characterized in that the locking pot arrangement in a recess (19 a) in an electrically conductive housing (17) is arranged so that between the inner wall (17 a) of the recess (19 a ) in the housing (17) and the inserted blocking pot outer conductor (ST-05) of the outer or first blocking pot (ST1) is formed a capacitor.

5. barrier pot arrangement according to one of claims 1 to 4, characterized in that the axial length (AL2) of the second locking pot (ST2) is smaller than the axial length (ALI) of the first locking pot.

6. barrier pot assembly according to one of claims 1 to 5, characterized in that the inner or second locking pot (ST2) is arranged concentrically and / or axially to the first locking pot (ST1) in this.

7. barrier pot arrangement according to one of claims 1 to 6, characterized in that the first and / or the second locking pot (ST1, ST2) around the central axis (ST-07) are rotationally symmetrical.

8. Sperrtopf arrangement according to one of claims 1 to 7, characterized in that the opening edge (ST- 15) of the first locking pot (ST1) with an input line (7) and the free end of the Sperrtopf-Innenleiters (ST-11) with an output or connecting line (9, 33) is connected.

9. barrier pot assembly according to claim 8, characterized in that the Sperrtopf arrangement is arranged with the input and the output or connecting line (7, 9, 33) in a bypass line to an RF path.

10. DC and / or low-frequency decoupling for RF links, especially RF devices such as radiofrequency quench filter, duplexer and the like with the following features:

an electrically conductive housing (17) with a ground connection is provided,

from a connection point (117, 117 ') on an HF path (3, 5), a decoupling path (13) is branched off,

the decoupling path (13) comprises, starting from the connection point (117, 117 '), a branch line (7, 9) in the form of a transformation line, for whose electrical length X / 8 + n - λ / 2 <L <3 λ / 8 + η · λ / 2λ / 8 + n · λ / 2 <L <3λ / 8 + n · K / 2 where λ represents a wavelength corresponding to one wavelength within the RF to be transmitted on the RF path (3, 5) And n represents one of the following numbers n = 0, 1, 2, 3, etc., with a condenser device (27a, 27b) in the form of a low pass and / or one adjoining the branch line (7, 9) RF short circuit, on the decoupling path (13), at least one blocking pot (127a, 127b) is provided in addition to the at least one capacitor device (27a, 27b),

the decoupling path (13) is formed as a bypass or bypass route (13), which between two connection points (117, 117 ') on the RF path

(3, 5) runs parallel to this, in such a way that between these two connection points

(117, 117 ') a Sperrtopf arrangement according to one of Claims 1 to 10 arranged and / or interposed.

11. direct voltage and / or low-frequency decoupling according to claim 10, characterized in that the decoupling path (13) is formed as a bypass or bypass route (13) that between the two connection points (117, 117 ') on the HF Route (3, 5) parallel to this from the one connection point (117) to the next a branch line (7) to a downstream capacitor (27) with a first locking pot (ST1) and the second locking pot therein (ST2) leads, whereas the second connection point (117 ') leads further branch lines (9) to a further capacitor (27b) with a further blocking pot (ST1) with second blocking pot (ST2) located therein, both first blocking pots (ST1, ST2; 127a, 127b ) each comprise an inner conductor (ST-11; 31a, 31b), which are connected to each other via a connecting line (33).

12. direct voltage and / or low-frequency coupling according to claim 10 or 11, characterized in that the structure is configured symmetrically at least in functional terms so that on the bypass o- the bypass route (13) to the two connection points (117 , 117 ') first connect two in electrical terms equal length branch lines (7, 9), at the free ends then one of the two locking pots (127a, 127b) is connected, the inner conductor (31a, 31b) via the connecting line (33) connected to each other.

13. direct voltage and / or low-frequency coupling according to claim 12, characterized in that the locking pot (127a, 127b) in a cylindrical bore (19a, 19b) in the housing (17) is arranged, wherein the wall of the cylindrical bore (19a , 19b) in the housing (17), a first capacitor half (20a, 20b) and the outer jacket of the Sperrtopfes (29a, 29b) form a second capacitor half (200a, 200b) of the capacitor means (27a, 27b).

14. DC and / or low-frequency coupling according to claim 13, characterized by the following features

the capacitor device (27a, 27b) consists of a cylindrical capacitor,

the cylindrical condenser comprises a hollow-cylinder-shaped bore (19) in the housing (17), the hollow-cylindrical housing wall forms the one electrical surface or first capacitor half (20a, 20b) of the condenser (27a, 27b),

inside this first cylindrical condenser half (20a, 20b) an electrically conductive hollow cylinder (25a, 25b) is inserted, which represents the respective second condenser half (200a, 200b) and thus forms the condenser (27a, 27b),

between the respective first and second capacitor halves (20a, 20b, 200a, 200b) a preferably cylindrical dielectric is inserted,

the hollow cylinder (25a, 25b) is formed as a cylinder pot (29a, 29b), and

each cylinder pot (29a, 29b) forms a locking pot (127a, 127b), each having a coaxial inner conductor (31a, 31b) which communicates with the associated pot bottom (30a, 30b) of the cylinder pot (29a, 29b) is electrically connected.

15. direct voltage and / or low-frequency coupling according to one of claims 10 to 14, characterized in that the two inner conductors (31a, 31b) connecting the connecting line (33) at the upper end of the respective inner conductor (31a, 31b) opposite to Pot bottom (30a, 30b) is electrically connected.

16. direct voltage and / or low-frequency coupling according to claim 15, characterized in that the connecting line (33) is connected at its ends to the inner conductors (31a, 31b) by means of soft soldering.

17. direct voltage and / or low-frequency coupling according to one of claims 13 to 16, characterized in that the two branch lines (7, 9) are each connected to the second capacitor half (200a, 200b).

18. direct voltage and / or low-frequency coupling according to claim 14, characterized in that the branch lines (7, 9) at the upper edge (32a, 32b) opposite to the pot bottom (30a, 30b) connected to the associated locking pot (127a, 127b) are, preferably by soft soldering (36).

19. direct voltage and / or low-frequency coupling according to one of claims 14 to 18, characterized in that the axial height or length of the coaxial inner conductor (31a, 31b) and thus the inner dimension of the cylinder pot (29a, 29b) and the Sperrtopfes (127a, 127b) λ / 4, where λ is a wavelength associated with a frequency band to be transmitted on the RF link (3, 5), and preferably a mean wavelength of the frequency band to be transmitted on the RF branch (3, 5) represents.

20. DC voltage and / or low frequency coupling according to one of claims 12 to 19; characterized in that in the housing (17) at the level of the upper edge (32a, 32b) of the locking pot (127a, 127b) a housing recess (217) is provided, through which the branch line (7, 9) is laid.

21. direct voltage and / or low-frequency coupling according to one of claims 12 to 20, characterized in that the branch line (7, 9) has an electrical length

3 A / 16 + n - X / 2 <L <5 λ / 16 + η * λ / 2

3λ / 16 + n * K / 2 <L <5λ / 16 + n * λ / 2, where λ represents a wavelength of the frequency band to be transmitted in the RF link, preferably the central wavelength and n is a natural number including 0 (n = 0, 1, 2, 3, etc.).

22. direct voltage and / or low-frequency coupling according to one of claims 12 to 21, characterized in that the branch line (7, 9) has a length L = λ / 4, wherein λ a wavelength of the to be transmitted in the RF path Frequency band represents, preferably the average wavelength of the medium frequency to be transmitted in the RF band.

23. direct voltage and / or low-frequency coupling according to one of claims 12 to 22, characterized in that the branch line (7, 9) extends straight.

24. direct voltage and / or low-frequency decoupling according to one of claims 12 to 23, characterized in that the branch line (7, 9) is curved, preferably in the form of a coil.