DK163775B - BROADBAND DISTRIBUTOR NETWORK - Google Patents

Abstract

In a home signal distribution network for individual and community antenna systems for the joint reception of the terrestrial audio and television broadcast programmes and one left-hand and one right-hand polarised DBS television programme each, two transmission lines are provided for separately supplying in each case two antenna sockets per subscriber connection point, in which arrangement the left-hand polarised DBS television signals are transmitted on one transmission line and the right-hand polarised DBS television signals are transmitted on the other transmission line in the first satellite intermediate-frequency band and each antenna socket has two outlets. In this home signal distribution network, terrestrial broadcast signals are also transmitted in both transmission lines, one outlet of the antenna sockets fed from the transmission line for the left-hand polarised DBS television signals being provided for receiving the terrestrial broadcast signals and the other outlet of the antenna sockets fed from the transmission line for the right-hand polarised DBS television signals being provided for the reception of the terrestrial television broadcast signals. As a result, the home signal distribution network can be set up, produced and installed in an electrically and mechanically simple and inexpensive manner, whilst having good transmission characteristics. <IMAGE>

Description

DK 163775 B

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a broadband distribution network for single and common antenna systems for joint reception of terrestrial and television radio broadcasting programs, as well as a left and a highly polarized direct satellite television (DBS) program with two transmission lines for separate supply of the two respective antenna sockets per subscriber terminal 10, whereby on the one transmission line, the left-polarized and the other the highly polarized DBS television signals are transmitted in the first satellite intermediate frequency range, and each antenna socket has two outputs.

Such a distribution network, which is built up as a star or tree network, is already known from the magazine "Antenna Kurier" from the company WLSI, edition 2/85 »page 20 8/9. Here, an antenna socket type is provided for receiving the terrestrial programs with output for radio and television broadcasts as well as the two DBS television signals with output for left-hand and right-polarized signals, respectively.

However, after the two DSB television signals have been separated over the two transmission lines, the transmission line for the entire frequency range (0.15 - 1/50 MHZ) (terrestrial radiophone signals and left-polarized UBS television signals) is passed through both cans for each subscription connection location, thus that the antenna sockets for DBB television reception are in reality also available over the left and the high 2

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repoiarized satellite program. Therefore, with this known system, four cable connections and thus also four connection terminals are required at all the through-boxes for DBS television reception. This means, on the one hand, that very large material, manufacturing and installation costs are obtained, especially with larger antenna distributors, and that the costs in some cases even exceed those required by the also known distribution system by three transmission lines and three different antenna sockets (respectively for terrestrial radio and television broadcasts with two different outputs and for the left and right polarized DBS television signals each with two identical outputs). On the other hand, even with the use of very thin 2q coaxial cable (which admittedly has too much attenuation for many applications), due to the large space requirement, it is at least extremely difficult to place such antenna sockets in standard and therefore cheap 55 mm. -UP cans; by using thicker cables with in practice more acceptable attenuation in the 1 GHz band this may even be impossible, so that larger built-in cans must be used, which significantly increases the price of the antenna distributor system. In addition, even in this case, the throughput attenuation of the current transmission line is relatively high in the first satellite flour in frequency range due to the dual connection required at each 35 subscriber connection point.

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sesledning. Moreover, in the two types of cans in the known antenna distributor, not only the electrical coupling configuration is very different but also the mechanical structure. Pette requires a relatively expensive storage team, disposition and manufacture in various tools and assembly places. Furthermore, in the antenna sockets for receiving the terrestrial radio broadcasting programs, special means are provided for the necessary separation of audio and television signals, since their frequency ranges are at least slightly spaced apart (e.g., 108-125 MHz = 17 MHz) and in In some cases, 15 may even overlap (for example, 0.15 to 125 MHz for audio broadcast and 47 to 1750 MHz for television broadcast).

2Q In the first case, high filter costs are required to obtain the required coupling attenuation, in the second case this attenuation can only be obtained by broadband technology, whereby the electrical transmission values are disadvantageous at high frequency and in case of use do not turn on in the 1 GJIz band.

The invention has for its object to provide an antenna distributor of the type mentioned above, which can be constructed simply and electrically and mechanically at the best possible earthing characteristics and can be manufactured and installed unwillingly.

This task is solved by transmitting terrestrial radiophone signals in both transmission lines that 4

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an outlet is provided for receiving the terrestrial audio radiophony signals from the antenna tap boxes fed from transmission signals, and the second outlet from the 5 socket fed from the transmission line for the highly polarized DiiS television signals ensures reception of the terrestrial fjernsynsradiofonisignaler. For the sake of good decoupling of the satellite signals from the terrestrial signals, this co-transmission is conveniently realized by selective input channels in which both satellite signals are combined with the terrestrial signals on the transmission lines. Hereby the terrestrial radio signals can be supplied to these input channels either broadband via a dual distributor, whereby the selection is made in the receivers, or selectively directly from the antennas, or via an input for separating the broadband signals in radio and television radio signals, respectively.

In the embodiment of the antenna distributor according to the invention, no passage of one transmission line is required through both passageways, so the passageway in both transfer lines is smaller and all passageways in the total distribution system each only need two cable connections and thus can be made in the same size and mounted in 55 mm recessed racks. [) a additionally, the two types of cans possess a subscriber terminal with the same outlet, namely, a pin terminal I for the terrestrial television radio signals, respectively the left polarized 11 mA television signals), and a muffin connection for the terrestrial audio radio signals, respectively, the right-polarized!) BS-f iron-sighted signals), they can be performed 3

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identical in their mechanical structure and quite similar to the years-long antenna sockets for receiving the terrestrial audio and television radio programs, it is concluded that, in all things, less material, manufacturing, can be obtained in a simple manner. and installation expenses.

As an electrical circuit for dividing the high-frequency energy into two outlets in the antenna sockets, two possible advantages are in practice particularly advantageous, namely the use of a directional coupler branch with a filter coupled into this branch for separation in the frequency ranges of the terrestrial radiophone signals. (o, 15 -ϋόϋ MHz) and I) The HS-f television signals (95 95 -175 M MHz), or the division via the two branches into two directional coupler branch switches, each optimized for one of these frequency ranges. While in the first alternative a better decoupling can be obtained, in the second it is possible to produce a certain counter-distortion effect at different branching attenuations. In both variants, the electrical circuitry of the antenna sockets of the distributor system according to the invention can be designed so that both types of cans can be used with the same components, where only the two filter connections are used. the two directional chlorine branches respectively can be interchanged. This will result in further considerable simplification and lowering of the production.

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Furthermore, according to the invention, the problem described in the prior art with respect to disconnection between the terrestrial audio and television radio signals is simply and effectively avoided since the connections for the terrestrial audio and television signals are made in two separate antenna sockets, without the need for coupling attenuation. between the respective outputs of the two antenna-10 sockets at a subscriber connection point is both by direct supply of the two frequency ranges from ue-related antennas in the corresponding input filter and by supply via an otherwise required, normally built up + 15 sling device in separation filter or benefits) obtained without additional aids. They petition for example. for antenna sockets with directional junction branching and using a splitting track greater than 50 dB. Also, the disconnect between the two outputs (terrestrial audio radiopharmacy / high-polarized DBS television signal and terrestrial telephony radiophony / left-polarized DiiS signal) for each of the two types of cans is at least sufficient: for two-band broadband disconnection independently of the frequency, coupled directional coupler branches are more than 40 dB, and even in the version with a directional coupling branch and a filter coupled into its branch it reaches a value greater than 25 dB, whereby the filter can be easily built and cheap.

Finally, the advantage of the invention is that in isolated cases there is a need for post-reinforcement.

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cheaply, the same amplifier types can be inserted because of the approximately equal strength level and frequency range of the two transmission lines.

5 As a general rule, the operating voltage supply to the outer satellite antenna and occasionally also an amplifier is not directly but by means of a remote supply channel. By means of the precautionary principle set out in claim 2, only a single housing for several appliances is required, so that a simple and inexpensive construction of this part of the distributor system is achieved, however these devices must be adaptable in all possible situations, so a In accordance with the invention, the antenna distributor according to claim J is particularly favorable.

Claims 4 and 6 specify two basic possibilities for the electrical coupling of the two antenna socket types, which - as already stated - can be advantageously constructed so that they can be used - as both pass-through and end-socket - for both can types for each subscriber - connection points, whereby only the connections for the channel, or in the second case the two directional coupler branches respectively, must be exchanged. Here it is particularly advantageous to design the branch and the channel modularly. The circuit of claim 4 is further characterized in that it can be designed in a simple manner by omitting 1

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8 see the branching and connecting the duct to the can entrance.

In the construction of this antenna socket according to claim 5, in relation to known high-low pass filters with the same number of components, where from the input there is first a slope (series lead), the repercussions from fault connections such as those in practice are frequent, e.g. . in case of unloaded outlets, the separation values are significantly smaller on the transfer values.

While in embodiments according to claims 4 and 5 a somewhat smaller throughput attenuation can be obtained, which is particularly advantageous for larger antenna distributors, the antenna sockets according to claim 6 are distinguished by a greater coupling attenuation between the branch connections as well as the possibility of different branching attenuation for the terrestrial radiophonic and DBS television signals to achieve a certain counter-distortion effect to equalize the different cable and component attenuation in the different frequency ranges and by optimizing each branching for one of the two frequency ranges to minimize their mutual load.

The arrangement of directional ball branches on a plug pin according to claim 7 gives a very simple mechanical structure suitable for machining in casting and soldering, with good electrical data, whereby the two antenna socket types differ only by the two two-pin circuit boards which, for the sake of rational production of the same size and device of 9

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the connections without extra changes can be plugged into the same main board.

In an inventive embodiment of the directional coupler for the first satellite intermediate frequency range according to claim 8, which is not reasonably achievable in the frequency range of the terrestrial radio frequency signals due to excessive length, the advantage of an extremely simple and inexpensive construction is obtained. Thus, in contrast to the known construction of the two directional coupler wires side by side in the same plane, the selected print thickness, as well as the width of the directional coupler conductor paths, due to the small tolerances and interference from scattering fields, in each case, desired transmission characteristics, in particular the 2Q branch attenuation by size and frequency dependence, as well as the magnitude of the coupling attenuation, are much more uncritically and accurately obtainable, the width of the two directional coupler wires, as well as the number and length of 25 not directly opposite to the other, can of course also be different.

A mean-sized embodiment of the directional coupler wires according to claim 9, and thus a substantial mechanical shortening of the directional coupler length, meets the desire for the least possible housing. Here, the length can simply be dimensioned so that the increasing frequency attenuation in the cable and the components just 35 are equalized.

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lo

In separate insert prints Γογ the two directional coupler branches envisaged in claim b, an embodiment according to claim 1a is particularly advantageous, because here only a simple replacement of the insert prints is necessary for the manufacture of the two can types. Thus, the dimensions of the two inserts can, of course, differ in principle. In practice, however, it is usually appropriate that they be equal.

Similarly, the design of the groove of claim 4 according to claim 8 also offers the advantage that both types of cans can be made of the same components, here only by the side-switched connection of the plug-in pins.

BRIEF DESCRIPTION OF THE DRAWINGS In the following, the invention will be described in more detail in FIG. 1 shows an exemplary embodiment of a distribution network according to the invention, as well as the principle construction of two alternative distribution options in an antenna-through socket 8,11 used therein, respectively. 10,13 without the coupling parts 9,12 which are not essential to the invention; 2 shows an exemplary embodiment of an antenna-through-socket 8,11 with two series-coupled directional coupler branches, the basic structure of the branch of the DBS television signals being carried out on a plug-in circuit in FIG. 2a to 2c; and FIGS. 3 shows another exemplary embodiment of an antenna pass-through socket 8,11 with a directional coupler branch 11

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30, which has a built-in prong, and a filter component 31, the front and back of which are shown in FIG. 3a, 3b and the corresponding equivalent diagram in FIG. 3c.

In the distribution network of FIG. 1, the two supply coaxial transmission lines 2, 3 Γογ of the left and right polarized DBS television 1 ° signal supply a non-external external satellite antenna with operating DC voltage via two coaxial transmission lines 2, 3. The terrestrial radiophonic programs are supplied from an antenna not shown to an amplifier k and via its broadband input a filter 5 which divides the terrestrial radiophonic signals into audio and television radiophonic signals.

These two frequency ranges are each connected via a channel collector 6.7, which is plugged in to the remote supply channel 1, so that the two DBB television signals 20 are supplied to the subscribers with the highly polarized DBS-F television signals along with the terrestrial television radio radio signals on the transmission line. 2 and the left-polarized DBS television signals along with the terrestrial audio radio signals on the transmission line 3. Thus, the first-mentioned signals arrive at through-boxes 8 via a branch 9 to an end-box 10 and the latter to through-boxes 11, and thence via a branch 12 to an end box 13.

At the coaxial pin outputs 14 respectively. i.3 in the antenna sockets b, lo, respectively. 11, 13, the terrestrial remote radiophone signals, respectively, can be used. the friend's three polarized DBB television signals are taken out, and at the coaxial sleeve 12

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jack 17, respectively. 1 6 the terrestrial audio radio signals, respectively. the highly polarized UJiS television signals. In the invention, all antenna sockets 8, 10, 11 and 13 5 show only two cable connections and the same output configuration, viz. a coaxial pin and socket outlet. (l) e are thus designed equally, both in their mechanical construction and in relation to the usual antenna sockets for terrestrial audio and television radio signals, and which are suitable for mounting in 55 mm built-in boxes, thereby advantageously obtaining a minimum of material, manufacturing and installation costs.

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In addition, the transmission attenuation is small due to the short wiring, whereby a post amplifier can sometimes be saved in larger antenna distributors. However, in special cases such an amplifier is necessary, so that approximately the same level of strength and frequency range are advantageously offered. By arranging the two outputs for receiving terrestrial radiophony in two separate antenna sockets, which are connected via wires, two inlet filters 6.7 and a splitting filter 5, a large decoupling has finally been achieved in the prior art. of audio and television radio signals of more than 50 dB without additional means.

In accordance with FIG. 2 through-boxes 8,11, two directional coupler branches 23,28,24 and 21,27,21 are provided in accordance with claim 6, which together with their trunk lines 21 are connected one after the other in the transmission line for distribution of high frequency energy. Uisse is arranged on two separate, double-sided, coated insertion portions 13 in recesses on a one-sided coated carrier print 20 and by means of all soldering on the coated side not shown, is simultaneously connected electrically and fixed mechanically.

5 in the schematic representation of FIG. 2, the points shown on the carrier print 2o are the parts of the trunk line 21 leading from the input II to the output A in the antenna socket, as well as the sonde (23) leading to the two outputs AB and where, by this arrangement, the terrestrial television radio signal and the highly polarized DBS television signal and the wires 24 leading to the two directional coupler resistors 22 can be taken out. The branch 18 optimized for the frequency range of the terrestrial television radio signals known per se (DK-DS 33 29 36b) constructed of a current transmission ii 20 1 and a voltage transmission The branch 19 optimized for the first satellite medium frequency range is constructed according to the invention ten with conductive technique, whereby the the faces 25, 26 enclosed ^ wave resistance stylized head 27 and side wire 28 of strip conductor directional coupler 27,28 are arranged opposite each other on the two sides of the setting print 19 · For their mechanical shortening, the main reading 27 is 30-shaped (Figure 2a).

The lateral line 2d arranged on the opposite side of the insertion pin 19 may exhibit the same configuration as the main conductor 27 (Kig.2b), whereby the maximum coupling factor is obtained, or

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Even cases are electrically more advantageous - also only in sub-areas opposite the mains lead 27 l ^ ig ^ c).

Of the projectable protrusions 1, 5, which can be plugged into corresponding recesses in the carrier print 20 on the insertion pins Id, 19, the middle projection 29 is designed to be somewhat longer, thereby greatly facilitating and shortening the insertion procedure.

In this antenna case, an extremely simple, car-like and accurate construction of the antenna sockets with the least possible manufacturing tolerances and corresponding favorable electrical data is obtained, and a simple, largely mechanical and thus cheap and accurate manufacture is possible. In addition, since both plug-in pins 18,19 exhibit the same connection configuration, for 8 and 11, respectively, of the portions embedded in the carrier 20, the two zo can types {outputs 8 for the terrestrial television radiophone area and the highly polarized UBS television signals, respectively.

outputs 11 for the terrestrial audio radiophone range and the left-polarized I) BS television signals) are produced only by replacing the two plug-in ld, 19.

In addition, in very simple and substantially better electrical data than the known lateral arrangement of conductor webs, in selecting print thickness, conductor width and the size of the facing conductor surfaces, the electrical data can be selected within wide limits.

^ For those according to FIG. 3 through-boxes 8,11, corresponding to claim 4 for distributing the high-frequency energy, a broadband directional coupler is provided.

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branch 30, coupled together with its parent line 33 in the transmission line, as well as a frequency filter 31 connected to its branch 34,36 for selective division into the frequency ranges of the respective can type which can be taken out at the two outputs and W2.

The manifold 30 and filter 31 are arranged on separate double-sided coated insert pins 3®, 31> which are insertable with their projections in corresponding recesses on a single-sided coated carrier 32, and on their not shown coated side by soldering are simultaneously connected electrically and mechanically attached.

15 x the schematic representation in Fig. 3, the parts of the supporting wire leading from the input JS to the output A in the antenna box 32, the branch line 34, the conductor leading from the directional coupler to the terminating resistor 35, are shown on the support print 32, and the trace output wires connected to both outputs W 37 · 25 The chain coupling branch (similar to the one on the plug-in circuit 1b in the embodiment according to Fig. 2) * ¥ is in a known manner with each of its current conductors and its voltage link is Ug.

The frequency filter whose equivalent circuits are shown in FIG. 3c, consists of a high / low pass combination with series lead, whereby according to claim 5 between the input 34 and the output W, respectively. thaw in this order one after another in beer a high-pass joint 3d without serial discharge joint, respectively.

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lb low pass link 39 and a high pass link Ao respectively. low pass link Al with series lead. This circuit provides particularly high freedom of feedback due to mismatched outputs, as is often the case in practice due to receiver impedances which deviate from the characteristic impedance, or even at idle by unconnected receivers.

As can be seen from Figs. 3a and 3b, this frequency filter is made entirely in print technique on the insertion print 31 ", which, as in the branching according to Figs. 2a to 2c, is also cheaply obtained in mass production, in a simple and highly accurate machine fabrication also very favorable electrical values with minimum tolerances.

In addition, as in the embodiment according to Fig. 2, the same components can be used for both can types; they differ only by a side-switched connection to the symmetrically built-in printing pin with respect to connection configuration 25 · In addition, in this circuit alternative, the simple possibility of optional execution as a through or end box can be found.

In order to produce the latter, one simply needs to omit the directional coupler branch and connect the filter input 34 directly to the can input E. Finally, the middle projection A2 of the insertion print 31 here is also somewhat extended for easier insertion into the carrier print 32.

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All in all, the structure described has achieved a further, significant fabrication simplification and price reduction, including at the warehouse.

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Claims (11)

18 DK 163775 B Patent claims. 1. Broadband Distribution Network for Single and Common-5 Antenna Systems (House Distributor Network) for Joint Receiving of Broadcast Audio and Television Radiophony Programs, as well as a Left and Right Polarized Direct-Satellite (DBS) Television Program, with two transmission lines (2,3) for separate supply of respective two antenna sockets (8,11 and 10,13) per subscriber connection point, where on the one transmission line (3) the left-polarized and the other (2) transmit the right-hand terminals. 15 polarized DBS television signals in the first satellite medium frequency range, and each antenna socket (8,10,11,13) has two outputs (14,16; 15,17), characterized in that in both transmission lines (2, 3) transmit terrestrial radiophonic signals that an output (17) is provided in the antenna sockets (11, 13)> fed from the transmission line (3) of the left-polarized 25 DBS television signals for reception of disc audio radiophone signals, and the second output (14) of the antenna sockets (8, 1o), which are fed from the transmission line (2J of the highly polarized DBS television signals) in order to receive the terrestrial television radio signals. 1 2. Advantage is a network according to claim 1, with a device (6,7) for connecting the terrestrial audio and television radio-phonics signals and l) the BS-TV television signals, with DK 163775B 19 selection or broadband separation of terrestrial radiophonic signals from one, as required, one-output broadband amplifier (4) and DC supply (1) of the 5 external satellite antenna via the transmission lines (2,3), characterized in that the devices 11,5,6 * 7) are integrated in a common house. The advantage is a network as claimed in claim 1 having a device (6,7) for interconnecting between terrestrial audio and television radiophonic signals and the DbS television signals, as well as selecting or broadband separation of the terrestrial radiophonic signals delivered from a broadband amplifier, as required, (4) having one output (5), as well as DC power supply (1) of the external satellite 1 antenna via the transmission lines (2,3), characterized in that the devices 11,5,6,7) can be connected to each other via connectors. Distributor network according to one of claims 1 to 3, characterized in that the electrical distribution of the high frequency energy in each passage box is effected by means of a directional coupler branch (3oJ) and a filter connected to it in its branch line (34). (31) for separating the respective PJld television signal from the terrestrial audio or television radiophonic signal 35 2o DK 163775 B Distributor network according to one of claims 1 to 5 with filters designed as steep high-low-pass filters, characterized in that from the input 5 respectively the output to the two outputs, respectively. (W ^ Vi ^) in alternating order follow at least one not steep (38 and 39, respectively) and a steep high, respectively. low pass filter (40 and 41, respectively). 10 Distributor network according to one of claims 1 to 3, characterized in that the electrical distribution of the high frequency energy in each passage box is effected by means of two directional coupler branches (1b, 19) 'connected in succession in the transmission line, one of which (19) is optimized for the first sa-2q tellite intermediate frequency range and the second (18) for the frequency range of the terrestrial radiophonic signals, and on whose two branching connections (AB ^ and AB ^), respectively, the DBS television signal, respectively. the terrestrial audio or television radio signals can be output. Distributor network according to one of claims k to b, characterized in that the directional coupler branches (18, 19) together with the filter (31), or both of the two directional coupler branches, are constructed in strip-conductor technology on a double-sided printed circuit board, which can be inserted into a common carrier print and conductively connected 35 to its terminals. 21 Distributor network according to claim b or claims b and 7, characterized in that the directional coupler (19) for the DBS, television signals is constructed as strip conductor directional coupler, the main wire (27) and side wire (28) being arranged on the two sides of the a double-sided coated insert (19) · Distributor network according to claim 8, characterized in that the main conduit (27) and the side conduit (28) are formed mutually shaped in the area where they are opposite one another, and their electrical length is then much less than one quarter of that. average operating wavelength that the branch attenuation in the total operating frequency range decreases with increasing frequency. 20 Distributor network according to claim 6, comprising directional coupler branches built on separate pluggable circuit boards, characterized in that the plug-in pins (18) for the respective terrestrial radiophonic signals exhibit the same connection configuration for the plug-in parts (20). son dan (19) for the corresponding DBS-f television signals. 1 2 3 4 5 6 2 Distributor network according to claim 4, in which the respective 3 antenna socket boxes the filter are built on a 4 separate insertion pin, characterized in that the 5-tier configuration for the insertion pins (* J1) is 6 so symmetrically that a side switch directly galvanic 22 GB 163775 B connection to the fixed connection points on a carrier (J2) is also possible. 5 10 15 20 25 30 35