JPS6231841B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable when a new device is connected to operate in parallel while a microwave receiver device or a microwave transmitter device is in operation, or when a new device is connected to operate in parallel. The present invention relates to a high-frequency circuit switching method having a simple configuration that allows connection or disconnection to be performed without cutting off the transmission signal power during operation when disconnecting the device.

[Conventional technology]

Regarding the conventional connection switching method, an example of its system configuration is shown in FIG. 1 is a high frequency branching circuit, 2 and 3 are a microwave receiver device or a microwave transmitter device, 4 is a transmission line to the antenna side,
5 and 6 are circulators shared by each receiver device or transmitter device; 7 is a terminator; 8 and 9 are high frequency devices for selecting frequencies suitable for each receiver device or transmitter device; 10; 11 is a receiver unit or a transmitter unit, 21 is a flange of the antenna side waveguide, 22, 23, 24, 25, 2
Reference numeral 6 indicates a flange for connecting circuit elements of each waveguide transmission line. Arrow A means the antenna side. B, C, and D represent the joints of the waveguide flanges and indicate adjacent points of each device.

This is a system in which N receiver devices or transmitter devices (N is an integer of 2 or more) are connected in parallel.
When further connecting M receiver devices or transmitter devices in parallel (M is an integer of 1 or more), the joint B (between flanges 21 and 22) in FIG. 1 or the joint The flanges at both ends, such as C or D, will be cut off and inserted. Therefore, if the joint part B is cut and an additional receiver device or transmitter device is connected between the flanges 21 and 22, the transmission of the receiver device or transmitter devices 2 and 3 must be interrupted in the process. Momentary interruptions in signal power are inevitable. If joint C is cut and an additional receiver or transmitter is connected between the two,
In this process, the transmission signal power of the receiver device or transmitter device after junction C is temporarily cut off.

FIG. 2 shows a conventional method of not cutting off the transmission signal power during operation. Reference numeral 31 indicates a directional coupler mounted on the transmission path 4, and 32 and 33 indicate directional couplers mounted near the input/output end of the branching circuit section of the receiver device or the transmitter device 2, respectively. 30 represents a coaxial transmission line connecting the directional coupler 31 and the directional coupler 32. The other configurations are the same as in FIG. 1.

Each receiver device or transmitter device is equipped with a directional coupler in advance at the input/output section of the high frequency demultiplexing circuit,
Before cutting the joint B, the directional couplers 31 and 32 are connected by the coaxial transmission line 30 so that signal power can be transmitted. Then, as shown in Figure 2, joint B
Even if the high frequency demultiplexer circuit is disconnected in the directional coupler 31, the coaxial transmission line 30, and the directional coupler 32, the signal power is bypassed and transmitted through the path of the directional coupler 31, coaxial transmission line 30, and directional coupler 32. do not have.

[Problem that the invention seeks to solve]

However, this method requires that each device be equipped with a directional coupler in advance, which is not economical. Furthermore, if the coupling of the directional coupler is strengthened in order to suppress the drop in signal power in the bypass circuit, there is a problem of characteristic deterioration that causes a drop in signal power in the original transmission path and impedance mismatch.

The present invention aims to solve these problems, and while one or more receiver devices or transmitter devices are operating in parallel, one or more receivers are newly added. When attempting to operate devices or transmitters connected in parallel, use a coaxial line equipped with a simple probe with a high dielectric material at both ends, regardless of the positional relationship of the duplexer system. To provide a method that can economically connect or disconnect without cutting off the original transmission signal power.

[Means to solve the problem]

The present invention is a system configured so that a plurality of microwave receiver devices or microwave transmitter devices can be connected in parallel to one antenna, and in which a new device can be connected or operated in addition to the device currently in operation. In a method for switching high-frequency circuits that disconnect devices inside, a coupling hole is prepared in advance in the microwave branching circuit to be connected or disconnected, and a probe equipped with a high dielectric material is inserted into the coupling hole. It is characterized in that connection or disconnection is performed after bypassing the signal via this probe.

[Effect]

By inserting a probe covered with a high dielectric material from the H-plane of the waveguide, an electric field is concentrated on this probe, and the transmission signal power extracted by the probe is transmitted through a coaxial transmission line and separated from the other end. Bypassed to one waveguide.

Most of the power in the waveguide is radiated from the separated flange, but if the degradation of the transmitted signal power is within the dynamic range of the receiver's AGC function, the transmitted signal power can be reduced by the receiver's AGC function. can compensate for the deterioration of

Therefore, although the signal-to-noise ratio of the bypassed transmission signals deteriorates, the coupling can be continued to the extent that signal transmission is not interrupted.

〔Example〕

An embodiment of the present invention will be described below.

FIG. 3 shows a coaxial line equipped with high dielectric probes at both ends used in the present invention. In FIG. 3, 41 and 42 are center conductors, 43 and 44 are high dielectric materials, 45 and 46 are probes that are constructed from the center conductor and high dielectric material and are designed for impedance matching, and 47 and 48 are flanges; 50 represents a coaxial line.

FIG. 4 is a block diagram of an embodiment in which this coaxial line is used. In FIG. 4, reference numerals 51 and 52 represent transmission paths of the duplexer system or transmission paths of the high frequency demultiplexing circuit section of the receiver device and transmitter device. B is the connection point of the high frequency demultiplexing circuit section, and shows the insertion section of the new expansion device.

Here, as shown in FIG. 5, the probes 45 and 46 shown in FIG. 3 can be inserted into the transmission circuit elements 51 and 52 on both sides of point B, where future equipment will be added and connected in the high frequency demultiplexing circuit section. Connecting holes 61 and 62 are drilled in advance. This is preferably provided on the H-plane of the waveguide.

When disconnecting the connection point B, as shown in FIG. 4, probes 45 and 46 are inserted perpendicularly to the H plane of the waveguide that corresponds to the transmission circuit element. This probe 4
5 and 46, the center conductors 41 and 42 are made of high dielectric material 4.
3 and 44, and impedance matching is performed, so when the probe is inserted into the waveguide in the E-plane direction, the electric field component in the waveguide is concentrated on the probe, causing a waveguide coaxial line conversion effect. The electromagnetic wave enters one of the separated transmission lines (waveguide) via the coaxial line 50, and in the same way, the opposite coaxial waveguide conversion effect is performed, and the signal power is transmitted and passes through the bypass circuit. becomes. At this time, most of the electromagnetic waves in the waveguide are radiated, but if the loss due to the coaxial waveguide conversion effect of one probe is about 15 dB, and the losses of the two are about 30 dB, the signal-to-noise ratio is Although the signal is temporarily degraded, the automatic gain control function of the transmission path allows coupling to a level that does not cause signal transmission to be interrupted. Since the coupling holes 61 and 62 are not used during normal operation, they can be used without electrically deteriorating the original transmission signal system by preventing leakage with a screw-in lid or the like.

FIG. 6 is a diagram showing an example of application of the present invention. Locations to be expanded in the future are connected by waveguide U-links 63. If the U-link 63 is removed when the U-link 63 is added to the position B in the figure, the signal power is almost cut off because the transmission circuit elements 51 and 52 are parallel to each other. In this case, if the high frequency bypass circuit of the present invention is inserted through the coupling holes 61 and 62 and the U link 63 is removed, the connection can be made without interrupting the signal power.

In each of the above examples, only the operation at the time of connection was explained, but the operation for disconnection can be performed in the same way, and since this method can be similarly understood from the above explanation, detailed explanation will be omitted here.

〔Effect of the invention〕

As explained above, the high frequency bypass circuit of the present invention uses a coaxial transmission line equipped with probes at both ends covered with a high dielectric material that has a simple structure and is inexpensive. The configuration is such that the probe is inserted into the bonded hole.
There is an advantage that connection or disconnection can be performed economically and without cutting off the signal power of the receiver device or transmitter device during operation. Moreover, there is an excellent advantage that there is no electrical deterioration of the transmission signal system during normal operation.

[Brief explanation of the drawing]

Figure 1 is a diagram showing an example of the configuration of a parallel operation system. FIG. 2 is an explanatory diagram showing a conventional method. FIG. 3 is a configuration example diagram of a coaxial line with a probe used in the present invention. FIG. 4 is a configuration diagram showing an example of implementing parallel connection according to the present invention.
FIG. 5 and FIG. 6 are explanatory diagrams of branch circuits. 1... High frequency branching circuit, 2, 3... Microwave receiver device or microwave transmitter device, 4... Transmission line to the antenna side, 5, 6... Duplex device circulator, 7... Terminating device, 8, 9... High frequency High frequency wave generator of the branching circuit section, 10, 11...Receiver unit or transmitter unit, 21...Flange of the transmission circuit element on the antenna side, 22, 23, 24, 25, 26
...Flange for connecting rotating elements of high frequency demultiplexing circuit section, 30... Coaxial transmission line, 31, 32, 3
3... Directional coupler, 41, 42... Center conductor, 4
3, 44... High dielectric material, 45, 46... Probe, 47, 48... Flange, 50... Coaxial transmission line, 51, 52... Transmission circuit element (waveguide), 6
1,62...Joining hole.

Claims (1)

[Claims] 1. A system configured so that a plurality of microwave receiver devices or microwave transmitter devices can be connected in parallel to one antenna, and in which new devices can be installed in addition to the devices currently in operation. In a high-frequency circuit switching method for connecting or disconnecting equipment in operation, a coupling hole is prepared in advance in the microwave branch circuit to be connected or disconnected, and a probe equipped with a high dielectric material is inserted into the coupling hole. The probe is inserted into the probe and the signal is bypassed through this probe before connection or disconnection is performed. A high frequency circuit switching method characterized by: