FI98257C - Combination / sorting device for radio frequency signals - Google Patents

Description

! 98257

~ Combining / sorting of radio frequency signals. ~ Combining and sorting of radio frequency signals

The present invention relates generally to telecommunications equipment, and more particularly to a radio frequency signal combining / sorting device that assembles a plurality of transmission signals for transmission to a common forward line or antenna.

A recent trend has been that in the mobile unit communication system, such as car telephones, etc., which use the 800 MHz frequency band, the so-called a cellular system in which the number of radio frequency channels arranged in the same base station corresponds to the traffic of the cells (radio zones).

For example, in a car telephone or similar mobile unit communication system, where the number of users has recently increased rapidly, a large number of channels, e.g., 32 or 64 channels, are required at the same base station.

In a case where so many radio frequency channels are arranged in the same base station, the base station's antenna division system technology is essential from an economic point of view, ·; ' and the development of an efficient radio frequency signal combining / sorting device is strongly required to combine multiple input signals into the same output signal.

The application of the radio frequency signal combining / sorting device is not limited to the above-mentioned antenna splitter, but * · 'it can also be applied generally to the power collection device,: **. having the structure shown in Figure 15 or 16.

The known power collecting device PA in Fig. 15 includes a so-called 3 dB hybrid circuits H1, H2 and H3 connected to each other and to the ground via resistors R1, 2 98257 R2 and R3, respectively, inputs INI and IN2 for 3 dB hybrid circuit H1, inputs IN3 and IN4 for 3 dB hybrid circuit H2 , and the output terminal OUT, which leads out of the 3 dB hybrid circuit H3.

In the above arrangement, the PA 3 dB hybrid circuit H1 combines the power of the signals input from the inputs INI and IN2 into the power supplied to the second input of the 3 dB hybrid circuit H3, while the 3 dB hybrid circuit collects the power of the signals input from the inputs IN3 and IN4 to the said 3 dB H3 hybrid. . Thus, the 3 dB hybrid circuit H3 directs the power input to it to collect power for output therefrom.

On the other hand, the known power collector PB in Fig. 16 includes input terminals INI, IN2, ... and INn, respectively connected to channel filters F1, F2, ... and Fn, each of which comprises a bandpass filter, isolators II, 12, ... and In. via, a power collecting circuit (or combining unit) JU connected to said channel filters F1, F2, ... and Fn, and an output terminal OUT leading out of the circuit JU.

In the power collection circuit PB described above, the signals input from the inputs INI, IN2, ... and INn are prevented from interfering with the other inputs by the insulators II, 12, ... and In, and the signals passing through the filters F1, F2, ... and Fn are subjected to power assembly in the combining unit JU for input from there via the output terminal OUT.

Although the so-called The 3 dB hybrid assembly system • · · is a simplified system basically devoid of *. · Frequency characteristics, because half the power is attenuated to the artificial loads whenever the power passes through the 3 dB hybrid circuit, it is not usually used as a signal combining / sorting device to achieve power transfer .

On the other hand, in the so-called in the combining unit-assembling system 98257 3, by using channel filters to pass predetermined channel band areas, by supplying signals of the respective channels, power assembling can be performed with a small distribution loss, and thus the system is generally used as a radio frequency signal combining / sorting device.

The relationship between the transmission characteristics of each channel and the respective channel is shown in the graphical diagram of Fig. 17, where the center frequencies of the respective channels are represented by f1, f2, f3, ... and fn. As can be seen in Figure 17, to reduce neighbor channel interference, a goodness value in excess of a predetermined constant value is required, while high frequency temperature stability is required to prevent an increase in insertion loss due to temperature-induced center frequency shift. However, in the case where the arrangement is applied to systems with a channel spacing of 100 kHz, for example in the 800 MHz to 1.5 GHz band, it is difficult to design a channel filter with stable frequency characteristics with a high quality value that also remains in the cavity resonator, semi-coaxial cavity resonator or in a dielectric resonator, etc., and thus insertion loss is unavoidable.

Accordingly, it is an essential object of the present invention to provide a radio frequency signal combining / sorting device arranged to use channel filters which do not have a very high quality value and frequency stability, but which can nevertheless be applied to a multichannel system with small channel spacing.

Another object of the present invention is to provide. . a radio frequency signal Y # combining / sorting device of the above-mentioned type, in which the size of the resonators used therein as channel filters is further reduced in order to achieve a small size, small losses and cost reduction. for a device that as a whole contains connected parts.

In order to achieve these and other objects, there is provided a device according to the preamble of claim 1, characterized by the features set forth in the characterizing part of claim 1, according to a preferred embodiment of the present invention. The radio frequency signal combining / sorting device according to the invention comprises a plurality of channel filters which pass through the band areas of the respective transmission channels, insulators connected to the respective inputs of said channel filters, a plurality of power comparison circuits comprising branch lines, outputs from the two power collection circuits in each case. The band regions of said respective channel filters are selected in such proportions that the band regions of the respective channel filters in the same power collection circuit are as far apart as possible.

With the arrangement of the present invention described above, the band areas of the channel filters connected to the same power collection circuit are alternately placed in every other channel. As a result, the channel spacing of the respective signals fed to the same power aggregation circuit is doubled for expansion, thereby reducing interference with neighboring channels. As a result, the requirements for the goodness values and frequency temperature stability of the respective channel filters are relaxed. On the contrary, even in the case where the channel filters are provided with the same goodness value and frequency temperature ·. ·.! with child stability, it becomes possible to apply the device to a system in which a large number of channels are set at small channel intervals.

. . ·. In another embodiment of the present invention, there is also provided a radio frequency signal combining / sorting device, the channel filtering unit being formed by the reception openings of the signal input means and the reception openings of the signal output switching means, and provided with a plurality of TM dielectrics. with resonators which are in each case adapted to pass through the band regions of the defined channels. The dielectric resonators are arranged flush with the receiving holes of at least said signal output switching means, and a connecting unit is provided on a circuit board in which the signal output switching means protrude from its surface, and on which branch wires are provided for transmitting the transmission lines of said signals. The combining unit is connected to said channel filtering unit to form said radio frequency signal combining / sorting device.

The radio frequency signal combining / sorting apparatus in the above embodiment of the present invention is broadly divided into a channel filtering unit and a combining unit, each having the structure described above, which are interconnected to form a single radio frequency signal combining / sorting device.

In the case where a radio frequency signal combining / sorting device is used for a cellular base station, since the power required for transmission is relatively lower due to the decrease in cell beam in recent years, small dielectric resonators with low specific power can be used. In general, in the TM-form dielectric resonators, such as the TM010 and TM110 forms '·' '', etc., although the goodness value is slightly lower compared to the dielectric resonator in the TEgi ^ form when the size of the dielectric resonator has to be reduced The TM-form dielectric resonator is able to maintain a high quality value compared to the TE-form dielectric resonator. Similarly, the channel filtering unit may be small in size and may have a small switching loss.

In addition, since the signal output connection means to be connected to the outputs of the respective resonator • · · of the channel filtering unit is formed integrally with the combining unit, by combining the combining unit into the same unit with the channel filtering unit, a radio frequency can be formed. sorting / sorting machine, which as a whole is even smaller in size «· ** '.

6 98257

These and other objects and features of the present invention will become apparent from the following description of a preferred embodiment thereof with reference to the accompanying drawings, in which: Fig. 1 is a schematic circuit diagram showing the basic structure of a radio frequency signal combining / sorting apparatus according to the present invention; Fig. 2 is a graph showing the emission curve of the respective channel filter shown in Fig. 1; Fig. 3 is an exploded perspective view of a radio frequency signal combining / sorting apparatus according to a preferred embodiment of the present invention, in which its channel filtering unit and the combining unit are shown separately; Fig. 4 is also a perspective view of the combining / sorting apparatus of Fig. 3, in which its channel filtering unit and the combining unit are connected to each other to form said apparatus; Fig. 5 is a schematic exploded perspective view showing the structure of a dielectric resonator representative of the channel filter used in the arrangements of Figs. 3 and 4; Fig. 6 is a cross-sectional view of the assembled channel filter of Fig. 5; Fig. 7 is a schematic top view explaining the structure of the connecting unit; Figures 8 (A) to 8 (C) are partial cross-sections on an enlarged scale along lines 8A-8A, 8B-8B and 8C-8C of the connecting unit of Fig. 7; Fig. 9 (A) is a perspective view of a radio frequency signal combining / sorting apparatus according to a second embodiment of the present invention as seen from the side of the signal input terminals; «Fig. 9 (B) is a similar view thereof as seen from the side of its signal output terminal;

Fig. 10 is a schematic top view of the device of Figs. 9 (A) and 9 (B); , 98257 Fig. 11 is a schematic side view of the device of Figs. 9 (A) and 9 (B); Fig. 12 is a schematic circuit diagram showing the general structure of a combining / sorting apparatus according to a second embodiment of the present invention; Fig. 13 is similar to the circuit diagram of Fig. 12, showing in particular another embodiment thereof; Figs. 14 (1 to 14 (4) are characteristic curves of the channel filters of the apparatus of Fig. 13; Fig. 15 is a circuit diagram showing a conventional power collection system (already referred to); Fig. 16 is a circuit diagram similar to Fig. 15, showing in particular another conventional a power collection system (already referred to), and Fig. 17 is a diagram showing the emission characteristics of the respective channel filter of the system (already referred to) in Fig. 15.

Before proceeding with the description of the present invention, it should be noted that like parts are denoted by the same reference numerals in all of the accompanying drawings.

First, the principle of the present invention will be discussed. Referring to the drawings, there is shown in Fig. 1 a schematic circuit diagram representing a general structure in principle with a radio frequency signal combining / sorting device G1 according to the present invention, which generally includes channel filters F1, F3, ... and Fn-1, and F2, F4, ... and Fn, which in each case pass through the associated transmission channel band area, insulators II, 13, --- and In-1 and 12, 14, ... and In, which are connected to the input of the respective channel filter , a power collection circuit JU1 (Junction Unit) connected to the outputs of the channel filters F1, F3, ... and Fn-1, and • · consisting of branch wires for combining the respective outputs into one output, a second power collection circuit JU2 which * «Is connected to the outputs of the channel filters F2, F4, ... and Fn, and which consists of second branch lines, and a 3 dB hybrid circuit 8 98257 H, which is connected to the outputs of said power collection circuits JU1 and JU2 and grounded through a resistor or artificial load R.

In the above arrangement of the present invention, the signals input from the inputs INI, IN3, ... and INn-1 are filtered by channel filters F1, F3, ... and Fn-1 independently of the signals input from the inputs IN2, IN4, ... and INn. , so that one output is assembled in the power collection circuit JU1. In the meantime, the signals input from inputs IN2, IN4, ... and INn are filtered by channel filters F2, F4, ... and Fn, regardless of the signals input from inputs INI, IN3, ... and INn-1, so that one output of power is collected. in the assembly circuit JU2. Thus, these two outputs are combined into one output with a 3 dB hybrid diplex H.

Figure 2 shows the emission characteristics of the channel filters in the channel filters F1 to Fn. Here, fl - f6 corresponds to the resonant frequencies of the chicken-left filters F1 - F6, and above. . the row shows the emission characteristics of the channel filters connected to the side of the power collection circuit JU1, the properties of the filters connected to the power collection circuit JU2 being shown in the lower row. Thus, the band areas of the channel filters connected to the second power collection circuit in each case are placed alternately in each other channel. Thus, the spacing of the respective signals input to the second power collection circuit is doubled for expansion, thereby reducing interference with neighboring channels. Correspondingly, the temperature stability of the goodness value and the frequency can be facilitated with the respective channel filter. Conversely, even in the case that. . duct filters with the same goodness value ** are used. and frequency temperature stability, they can be applied:. in a system where multiple channels are routed through a narrow channel spacing.

It should be noted here that in the above arrangement, due to the operation of the hybrid circuit H and the artificial load R, although the power supplied to 98257 9 consists of half the assembled power supplied from the two power collection circuits JU1 and JU2, the switching loss in each filter is only simple combining unit-assembly system, it becomes possible to perform the assembly in its entirety with a small insertion loss.

Next, the first embodiment will be explained. Figures 3 to 8 (C) show the structures of a radio frequency signal combining / sorting apparatus according to a preferred embodiment of the present invention.

Fig. 3 is an exploded perspective view of a radio frequency signal combining / sorting device G1, in which its channel filtering unit and combining unit are shown separately, and Fig. 4 is a perspective view of the combining / sorting device G1 of Fig. 3, in which its channel filtering unit and combining unit are connected to each other. to form the device.

In Fig. 3, the radio frequency signal combining / sorting device G1 generally includes a channel filtering unit 100 and a combining unit 101, which are shown separately for the sake of clarity. The channel filtration unit 10a further includes a metal housing 1 having a rectangular box open at the top and having eight TM-shaped dielectric resonators F1 to F8 in the housing 1. Each of these dielectric resonators F1 to F8 consists of a cavity of a metallized ceramic material which is hexagonal in shape. . and a pin-shaped die arranged in said cavity. . an electrical member, which will be explained in more detail later.

. The signal input terminal holes Hi and the signal output terminal hole Ho are formed on the upper surface of the respective dielectric resonator F1 to F8 of Fig. 3. In addition, threaded holes 2-13 are formed in the circumferential edges running around the upper opening of the housing 1 for receiving screws for attaching the connecting unit 101.

58257 Meanwhile, the connecting unit 101 shown in Fig. 3 comprises mainly two substrates 15 and 16 of ceramic material, a branch line formed between said two substrates and, signal input connection means, signal output connection means, and input and output connectors mentioned below. In Fig. 3, the ceramic substrates 15 and 16 are mounted so as to have on their upper surface eight signal input terminals INI -IN8 and one signal output terminal indicated by OUT. Holes 22 to 33 are formed at the edges of the substrates 15 and 16 at positions similar to the threaded holes 2-13 for fixing the connecting unit 101 to the channel filtration unit 100 with screws (not shown).

Assembled, the channel filtering unit 100 and the combining unit 101 are combined as shown in Fig. 4 to form an 8-channel radio frequency signal combining / sorting device G1.

Hereinafter, with reference to Figs. . structure of the dielectric resonators used in the unit 100.

In the exploded exploded perspective view of Fig. 5, the F-labeled dielectric resonator includes a square ceramic member 50 on opposite sides of it as an open square box-like structure and metallized outer surfaces, the inner dielectric member 51 having a side the inner surfaces facing the open sides are metallized. When the ceramic member 50 and the side plates 53 and 55 are joined, a dielectric resonator 1 is formed in the ceramic cavity. In addition, holes Hi and Ho are formed in the upper surface of the ceramic member 50 for receiving the signal input terminal means and the signal output terminal means.

As shown in Fig. 6, which shows a cross-section of the dielectric resonator F of Fig. 5 after the assembly 98257 11, a shielded cavity is formed by an electrode layer 52 formed outside the ceramic member 50, and electrodes 54 and 56 formed on the inner surfaces of the ceramic plates 53 and 55, and said cavity and inner dielectric by means of the member 51, the resonator acts as a dielectric resonator of the TMno form.

Next, the structure of the connecting unit 101 will be explained with reference to Figs. 7 to 8 (C).

Figure 7 represents branch lines formed on the upper surface of the ceramic substrate 15 and made in particular of transmission lines. In Fig. 7, reference numeral 45 denotes a so-called tri-plate type transmission line.

Figures 8 (A), 8 (B) and 8 (C), respectively, show partial cross-sections along lines 8A-8A, 8B-8B and 8C-8C in Figure 7.

In Fig. 8 (A), showing a cross-section along the line 8A-8A in the transmission line portion, a ceramic substrate 15 is formed by forming electrode layers 41 on the lower and upper surfaces of the ceramic plate 40, while a second ceramic substrate 16 is also formed by forming electrode layers 43 on the upper and lower portions of the ceramic plate 42. the bottom surface. The portion 15 of the predetermined ceramic substrate is. formed a groove g along which groove a dielectric member 44 is arranged, the second electrode 45 being formed in the dielectric member 44 as shown. This electrode 45 forms a three-plate type transmission line together with the electrode 41 of the ceramic substrate 15 and the electrode 43 of the ceramic substrate 16.

• «« 12 98257 through the hole 15a passing through the lower surface.

Fig. 8 (C) shows a cross section of a part of the output connector (along the line 8C-8C in Fig. 7). In this part, an opening is formed in the ceramic substrate 16, and the output terminal OUT is mounted on the upper surface of the ceramic substrate 16, the center conductor 18 of said terminal being connected to the electrode 45 as shown.

In addition, a through hole is formed in the ceramic substrates 15 and 16 at the respective input connector mounting portion, and the center wire of the respective input connector extends through the lower surface of the substrate 15 as a signal input connection means such as a switching probe, a switching loop, etc.

By fitting and attaching the combining unit 101 having the above-mentioned structure to the channel filtering unit 100, the coupling probes 17 projecting from the lower surface of the combining unit 101 are positioned in the signal output terminal Correspondingly, the signals of the respective channel supplied from the signal input terminal are fed to the respective dielectric resonators, and the signals produced in the signal output connection means are subjected to power collection in the branch lines 45 consisting of transmission lines to be output through the output terminal OUT.

It should be noted here that the branch line shown in Fig. 7 is arranged so that the electrical length of the output from each dielectric resonator (i.e., the short-circuit surface of the resonator *. * Equivalent) at the first branch point a «or b becomes an odd multiple of the quarter wavelength, while a or b The electrical distance to the second branch point in the second stage (ie the point at which the center conductor of the output terminal OUT must be connected) becomes an integer multiple of the half-wavelength. By arranging the branch wires as described above, at the frequency of the design wavelength, viewed from each branch point towards the second dielectric resonator, the impedance increases sharply, and thus power supply can be performed from the output terminal with almost no transmission power loss on its own channel.

Second Embodiment: Figs. 9 (A) to 11 show a radio frequency signal combining / sorting apparatus according to a second embodiment of the present invention.

Figs. 9 (A) and 9 (B) represent the appearance of a 32-channel radio frequency signal combining / sorting device 'G2', with Fig. 9 (A) being a side view of the signal input terminals and Fig. 9 (B) being a view of the signal output terminal of said device. at half. In Figs. 9 (A) and 9 (B), 32 inputs INI to IN32 are arranged on the second surface (Fig. 9 (A)) of the main body B of the device G2, corresponding to the number of channels arranged in the same plane, while on the opposite surface (Fig. 9 (B)) one output terminal OUT is provided. In addition, a plurality of air cooling fans, indicated by reference numerals 60, 61, 62, 63, 64, 65, 66, 67, are provided on the four surfaces of the device G2, other than the two opposite surfaces with the signal input terminal INI -: IN32 and the signal output terminal OUT. , and so on.

Fig. 10 is a schematic top view showing the general internal structure of the combining / sorting device G2, while Fig. 11 is a schematic side view on an enlarged scale along the line 11-11 of Fig. 10.

In Fig. 10, the symbols F1 to F32 denote channel filters, which in each case consist of ΤΜοιο mode dielectric repeaters which pass through the band regions of the selected channels. Odd, denoted by reference numbers Fl - F31 *; the outputs of the channel filters are assembled into a single output on a power size * ·, · amplification circuit (hereinafter referred to as a combining unit) ·; ·· JU1, which comprises branch wires. On the other hand, the outputs of the even channel filters, denoted by reference numerals F2 to F32, are assembled into a single output by the combining unit JU2. Rotating members C1 and C2, respectively, are provided, which are in each case connected to the artificial loads R1 and R2. The rotating member C1 is adapted to lead the output of the connecting unit JU1 to the output terminal OUT, while the rotating member C2 leads the output of the connecting unit JU2 to the output terminal OUT.

On the other hand, each symbol JUa to JUh represents a combining unit in which branch wires consisting of transmission lines are formed on a substrate so that four resonator outputs are formed, respectively. For example, the combining unit JUa forms the output of the resonators F1, F3, F9 and F11, respectively, at point a. and they are fed to the rotating members C1 and C2, respectively.

It should be noted here that the branch wires of the connecting units JUa - JUh are arranged so that their electrical length from each resonator to the branch point is an odd multiple of the quarter wave. On the other hand, in the branch lines JU1 and JU2, to assemble the outputs of the respective combining units, the electrical length <<1 from the combining unit to the branch point i or j is arranged as an integer multiple of the half-wavelength.

* · *

In the nucleation unit, the electrical length from the respective output of the channel filters F1, F3, F9 and F11 (equivalent to the short-circuit surface equivalent of the respective resonator) to the first branch point a, the electrical length of the channel filters F5, F7, F13 and F15 from each output to the first output channel filters F17, F19, F25 and F27, respectively. ·· from the output to the first branch point c, and the electrical length from the respective output 4 · • i of the channel filters F21, F23, F29 and F31 to the first branch point g, is respectively arranged as an odd multiple of the quarter wavelength. At the same time, in the connection unit JU2, the electrical length from the respective output of the channel filters F2, F4, F10 and F12 to the first branch point b, the electrical length from the respective outputs of the channel filters F6, F8, F14 and F16 to the first branch d the electrical length from the respective output of the channel filters F18, F20, F26 and F28 to the first branch point f, and the electrical length from the respective output of the channel filters F22, F24, F30 and F32 to the first branch point h, are respectively arranged as an odd multiple of the quarter wavelength. On the other hand, the electrical distance from the branch points a, c, e and g to the branch point i in the second stage is arranged as integer multiples of the half-wavelength. Similarly, the electrical distance from the branch points b, d, f and h to the branch point j in the second stage is arranged as integer multiples of the half-wavelength. By designing the combining unit as described above, with the frequency corresponding to the designed wavelength, the impedance increases sharply from the other branch point towards the other channels, and thus the transmission power of the own channel is supplied to the rotating elements C1 and C2 with almost no loss. Similarly, the amount of switching attenuation relative to other transmitters (i.e., circuits that supply transmission power to the channel filter through an isolator) also increases, so that a corresponding reduction in interference between transmitters is obtained. The cross-sectional view of Fig. 11 shows the internal structure with respect to the channel filter F4. In Fig. 11, the ceramic cavity 70 has a column-like inner dielectric member formed integrally between the bottom wall and the top wall of the cavity to form a dielectric resonator of the TMoio form. The signal input switching loop 72 and the signal '· *' output switching loop 73 are arranged with respect to this resonator in the bottom wall of said ceramic cavity 70 and. on the top wall. The metal housing has 32 channel filters, • «... with a structure as described above. In Fig. 11, input terminals IN2, IN4, IN6 and IN8 and isolators 12, 14, 16 and 18 are provided for supplying signals to the connection loop of the resonator (channel filter) corresponding to the respective input terminal. A branch line is also provided as a connecting unit JUb for connecting the outputs of the respective channel filters F2, F4, F10 and F12 shown in Fig. 10 (the outputs of the above switching loops), the electrical distance of point b for switching the outputs of the channel filters F6, F8, F14 and F16 shown (the outputs of the above switching loops), the electrical distance of point d being an odd multiple of a quarter wavelength. The branch wire of its first stage consists of a pattern on a plate, for example a strip wire or a transmission line, while the wire of the second stage consists of a coaxial cable and the like.

In the above-described arrangement, the signals input from the odd number input terminals represented by the respective input terminals INI to IN31 are routed to power aggregation in the four combining units and the coaxial cable, etc. so as to be fed to the rotating element C1, and the even number inputs represented by the respective input terminals the signals are routed to power aggregation in four connecting units and a coaxial cable, etc., so that they are fed to the rotating element C2. Half of the input power applied to the circulating elements C1 and C2 is in each case attenuated by the artificial loads R2 and R1, and the collected signal is fed out of the output terminal V: out.

On the other hand, the air cooling fans 60 to 67 are adapted to dampen the temperature rise of the dielectric resonators by immediately cooling the rollers of the dielectric resonators 32. In particular, air cooling vents 63 and 64: Y reduce the heat generation of the artificial loads R1 and R2. Since 'the corresponding dielectric resonators are all TM-shaped, • «in which the inner dielectric member is in direct contact' ·; · on two surfaces of the cavity (i.e. integral casting), the heat of the inner dielectric member effectively radiates from its surface through the cavity to reduce the temperature rise in the inner in a die-electric organ.

98257 17

Correspondingly, the frequency variation stabilizes, leading to a reduction in the interference loss.

It should be noted here that in the embodiments described above, although the dielectric resonators used as channel filters are single mode, the arrangement can be modified, for example, to use a single multi-TM dielectric resonator as a multi-channel channel filter, or as a multi-channel channel filter.

Fig. 12 is a circuit diagram showing the general structure of the combining / sorting device G2 according to the second embodiment described so far.

In Fig. 12, there are as many channels assigned to the channel filters F1 to F32 as to said filters. More specifically, the combining unit JU1 comprises the outputs of the channel filters F1 to F31, passing the odd-numbered channels, while the combining unit JU2 comprises the outputs of the channel filters F2 to F32, passing through the even-numbered channels. The output of the connecting unit JU1 passes through the rotating member C1, exiting half of its power to the terminal OUT, and half of the power passes through the rotating member C2 and is consumed by the artificial load R2. At the same time, the output of the connecting unit JU2 passes through the rotating member C2, exiting half of its power to the terminal OUT, and half of the power passes through the rotating member C1 and is consumed by the artificial load R1.

Although the above embodiments relate to a 32-channel radio frequency signal combining / sorting apparatus, more groups of combining / sorting apparatus having the above-described combining / sorting apparatus may be provided to form a multi-channel radio frequency signal combining / sorting apparatus. * ty circuit structure, and lead their outputs to power assembly in hybrid circuits.

·

Fig. 13 shows an example of the circuit structure G3 referred to above. In Fig. 13, the channel filters F1 - 98257 18 F64 pass through the same number of channel bands as the filters. The input terminals INI to IN64 conduct the respective input signals to the respective channel filters via isolators, the combining unit JU1 is arranged to assemble the outputs of the channel filters FI, F5, ... and F61 to the same output, the combining unit JU2 is arranged to assemble the outputs of the channel filters F3, F7, ... the combining unit JU3 is intended to assemble the outputs of the channel filters F2, F6, ... and F62, and the combining unit JU4 must assemble the outputs of the channel filters F4, F8, ... and F64. H1, H2 and H3 represent 3 dB hybrid circuits each having resistors R1, R2 and R3 as artificial loads. The 3 dB hybrid circuit H1 assembles the outputs of the two combining units JU1 and JU2, and the 3 dB hybrid circuit H2 assembles the outputs of the combining units JU3 and JU4, and the 3 dB hybrid circuit H3 assembles the outputs of the hybrid circuits H1 and H2.

Figs. 14 (1) to 14 (4) are diagrams showing the channels belonging to the respective channel filter of Fig. 13 and their transmission characteristics. Figures 14 (1) to 14 (4) show the emission characteristic curve of the respective channel filter for conducting signals to the combining units JU1 to JU4. By arranging so that the channels connected to the respective connecting unit ·; the bands of the filters are furthest apart, the effect of interference between the respective channel filters and the corresponding transmitters connected to them is reduced to a minimum.

As can be seen from the above description, according to an embodiment of the present invention, a channel filter to be connected to one of the power collection circuits formed of the branch line .... the bandwidth of the device becomes wider than the movable channel spacing as a whole, and thus the temperature stability of the goodness value and frequency is less affected by the device, and thus it is possible to achieve assembly with a small switching loss. In addition, even if used at the same time channel filters with goodness value and frequency temperature stability, a large number of channels, 98257 19 arranged in a narrow channel spacing, can be transmitted without increasing the switching loss.

Furthermore, according to another aspect of the present invention, since the TM-shaped dielectric resonator is used as a channel filter, it is possible to provide a small size with a relatively high quality value, and further, by forming a transmission line and signal output connection means forming a branched connection unit to the same channel filter unit. as a whole, an even smaller size can be obtained. Another advantage of the device according to the present invention is that since each channel filter consists of a dielectric resonator of the TM shape, a high heat radiation efficiency is achieved, whereby the temperature rise is attenuated to a small extent. Correspondingly, the combining / sorting device is small in size, has a low interconnection loss and low cost, and can be advantageously used for base stations in a cellular system with a smaller cell radius.

Although the present invention has been fully described by way of example with reference to the accompanying drawings, it should be noted that various changes and modifications will be apparent to those skilled in the art. Accordingly, unless such changes and modifications depart from the scope of the present invention, they should otherwise be considered included herein. 1 «· • I • · • · • · • ♦ • ·

Claims (2)

1. Radio frequency signal combining / sorting device, comprising: - multiple channel filters (F1 ... F64) allowing pass band areas of respective transmission channels, - insulators (IN1 ... IN64) connected to respective inputs of said channel filters, and - several groups of power combining circuits (JU1, JU2, JU3, JU4), sorti contain branching lines for combining the outputs of said channel filter to an output, characterized by hybrid circuits (H1 - H3), which have been arranged to combine the outputs of the respective two groups of said power combining circuits (JU1, JU2, JU3, JU4), wherein said respective channel filter (F1 ... F64) band areas are selected in such relationships that the corresponding channel filter (F1, F6 ... F61) band areas in the same power combining circuit ( JU1) is arranged at the widest possible distance from each other. 2. Radio frequency signal combining / sorting device according to claim 1, characterized in that said several channel filters have been implemented as a channel filter unit (100) which has been formed with the receiving heels (Hi) of the signal inputs and the signal outputs receiving means of the signal outputs. Heels (Ho), and have been provided with multiple dielectric resonators (F1 - F8) in TM form, respectively arranged to allow the fl ow regions of specified channels to pass, said dielectric resonators (F1 - F8) is arranged in the same piano with the receiving heels (Ho) of at least said signal output switching means (Ho), and said several groups of power combined circuits. has been implemented as a combination unit (101) with a circuit board, from the surface of which the output of the output signal connectors protrudes, and • · · *. on which has been provided branch lines containing transmission lines for combining the outputs of said signal output switching means, said combining unit (101) having been combined with said channel filter unit (100) to form said radio frequency combining signal sorting device.