JP2749575B2 - High frequency synthesis switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention switches or combines two high-frequency signals, such as two transmitter outputs, to two loads, such as a transmitting antenna and a pseudo load, and supplies them. Regarding the composition switching device,
The high-frequency signal can be switched or combined and supplied without interruption. (Summary of the Invention) The present invention switches a high-power high-frequency signal without an instantaneous interruption by combining two high-frequency signal sources and two high-frequency switches connected to two loads via impedance matching lines. Alternatively, they can be synthesized. (Prior Art) As shown in FIG. 4, for example, a conventional high-frequency synthesis switching device of this type includes two bridge-type distributors 11 and 12 connected to a variable line 1.
5 in which the line length of the variable line 13 is mechanically changed, and the high-frequency two-input signal is compositely switched according to the phase shift amount, or as shown in FIG. And three change-over switches 14A that are linked to each other
~ 14C and bridge type synthesizer 15 in combination,
High frequency 2 of input signals A and B Output signals A and B and absorption resistors 16,1
In some cases, the composition is switched by changing the connection status of the device. (Problems to be Solved by the Invention) However, each of the above-described conventional high-frequency synthesis switching devices has a complicated and large circuit configuration, and furthermore,
There is a problem in that the operation of the composition switching requires about several seconds, during which time the supply of the high-frequency input signal to the load serving as the transmitting antenna is delayed or momentarily interrupted. (Means for Solving the Problems) An object of the present invention is to solve the above-mentioned conventional problems, and to take the time to perform the composition switching operation, which is a disadvantage of the conventional device, that is, the circuit configuration is complicated and large, An object of the present invention is to provide a high-frequency synthesis switching device in which all points where supply of a high-frequency signal to a load is momentarily interrupted are removed. Thus, the present invention solves the above-mentioned conventional problems by implementing the following three points, and aims at reducing the size and weight of the high-frequency synthesis switching device. (A) No bridge type synthesizer is used. (B) Instead of the line means for mechanically changing the line length, 1 /
Use a two-wavelength line. (C) Instead of a plurality of interlocked high-frequency switches, a plurality of instantaneously operated high-frequency on / off switches are used in combination, and at least two of the plurality of high-frequency switches are simultaneously turned on. hand,
An operation is performed so that any one of the high-frequency switches is always in the ON state and the instantaneous interruption of the high-frequency signal does not occur. That is, the high-frequency synthesis switching device of the present invention includes a first high-frequency switch group (2) configured by connecting two high-frequency on / off switches e and f in a half-bridge type, and the high-frequency on / off switches e and f. When the connection point is a first connection point, and terminals e and f of the high-frequency on / off switch on the side where e and f are not connected to each other are first and second open terminals, respectively, Of the two high-frequency switches (2), one end of which is connected to the first and second open terminals and the other end of which is connected to the first and second input terminals, respectively. Wavelength line (4,
8) and a half-wavelength line having a normalized impedance of 1 having one end connected to the first connection point of the first high-frequency switch group (2) and the other end connected to a first output terminal ( 6)
And a second high-frequency switch group (1) configured by connecting four high-frequency on / off switches a, b, c, and d in a bridge type.
The connection point between a and c of the high-frequency on / off switch is a second connection point, the connection point between c and d is a third connection point, the connection point between d and b is a fourth connection point, and Assuming that a connection point between b and a is a fifth connection point, one end is connected to the second and fourth connection points of the second high-frequency switch group (1), and the other end is the first and second connection points, respectively. One end is connected to two half-wavelength lines (3, 7) having a normalized impedance of 1 connected to the second input terminal and to the third connection point of the second high-frequency switch group (1). Normalized impedance connected and the other end connected to the first output terminal A line (5) in which quarter-wavelength lines each having 1 and 1 are connected in series, and one end connected to the fifth connection point of the second high-frequency switch group (1), and the other end connected to the second output. The short-circuit point of the T-branch stub connected to the terminal is mechanically moved to reduce the normalized impedance. And a 1/4 wavelength line (9) for changing from (1) to (1). (Operation) Therefore, in the high frequency synthesis switching device of the present invention,
With a relatively simple and small configuration, it is possible to instantaneously switch the combination of the load of the high-frequency two-input signal without an instantaneous interruption. (Example) Hereinafter, the present invention will be described in detail with reference to the drawings with reference to examples. First, FIG. 1 shows a preferred configuration example of the high-frequency synthesis switching device of the present invention. The high-frequency synthesizing switching device according to the illustrated configuration includes two high-frequency input signals A,
B, and two sets of high-frequency on / off switches 1 and 2 that take out one of two high-frequency output signals A and B are used to convert two types of high-frequency input signals A and B into two types of high-frequency output signals. The composition or the switching is performed continuously and instantaneously. Thus, this kind of high-frequency synthesizing switching device, especially this kind of device for high power, is actually used exclusively for transmitting two transmitter output high-frequency signals to a common transmitting antenna and a test adjustment pseudo load. Therefore, in the case of the transmitting antenna supplying the high-frequency output signal A in the configuration shown in FIG. In the illustrated configuration, a high-frequency signal is supplied for test adjustment to a pseudo load that supplies the high-frequency output signal B in the configuration shown in the figure. In the present invention, it is the most suitable to the actual use condition that the short-time impedance mismatch in It is changing apparatus. That is, in the illustrated configuration example, 1 and 2 are groups of four and two high-frequency on / off switches a, b, c, d and e, f connected in a bridge type and a half-bridge type, respectively. 4, 6, 7 and 8 are impedance-matched coaxial or parallel lines having a normalized impedance of 1 and 1/2 wavelength, and 5 is a normalized impedance. And a line having a length of 1/4 wavelength and a line having a normalized impedance of 1 and 1/4 wavelength are connected in series to form a coaxial or parallel line for impedance matching. Move the stub short-circuit point mechanically with a motor or manually to reduce the normalized impedance. Is a coaxial or parallel line for impedance matching having a length of 1/4 wavelength that is varied from 1 to 1. The high frequency on / off switches a and b in the switch group 1 are simultaneously closed, and the high frequency input signal A and B is supplied in parallel to the dummy load to obtain a high-frequency composite output signal B, and a normalized input impedance is obtained. And the high-frequency on / off switches a and b in the switch group 1 to match the normalized input impedance 1 when the high-frequency input signals A and B are independently supplied to the dummy load to obtain the high-frequency switching output signal B. The state is switched. Each of the high frequency on / off switches a to f constituting the switch groups 1 and 2 is, for example, configured as shown in FIG. 2, and each of the contacts T respectively connected to the inputs IA and IB and the outputs OA and OB. _IA, T _OB, is obtained by so as to connect the T _IB, armature respectively sequentially between each other T _OA through the dielectric _{C L a, L b, L} d, L c, the capacity of the dielectric Due to the series resonance of C and the inductance L of the contact piece, each contact is substantially short-circuited. In addition, the movement of close proximity of the contact piece to the contact point
L _{a to} L _d are mechanically driven by motors or electromagnets via the driving rods S _{a to} S _d , respectively. Next, the respective operation states of the switching of the synthesis of the two high-frequency input signals in the high-frequency synthesis switching device of the present invention having the configuration shown in FIG. 1 will be described with reference to FIGS. 3 (a) to 3 (f). (A) When the high frequency input signal A is taken out as the high frequency output signal A. As shown in FIG. 3A, the high-frequency switches a to d in the switch group 1 are all opened, the high-frequency switch e in the switch group 2 is closed, and the high-frequency switch f is opened. (B) A case where the high frequency input signal B is taken out as the high frequency output signal A. As shown in FIG. 3B, all the high frequency switches a to d in the switch group 1 are opened, the high frequency switch e in the switch group 2 is opened, and the high frequency switch f is closed. (C) When the high frequency input signal A is taken out as the high frequency output signal B. As shown in FIG. 3C, the high-frequency switch a in the switch group 1 is closed, the other high-frequency switches b to d are all opened, and the high-frequency switches e and f in the switch group 2 are both opened. Then, the short-circuit point of the T-branch stub in the impedance matching line 9 is adjusted to the state of the normalized impedance 1. (D) A case where the high frequency input signal B is taken out as the high frequency output signal B. As shown in FIG. 3D, the high-frequency switch b in the switch group 1 is closed and the other high-frequency switches are closed.
a, c, d are all opened, the high frequency switches e, f in the switch group 2 are both opened, and the short-circuit point of the T branch stub in the impedance matching line 9 is adjusted to the state of the normalized impedance 1. (E) A case where the high-frequency input signals A and B are combined and extracted as the high-frequency output signal A. As shown in FIG. 3E, the high-frequency switches a and b in the switch group 1 are opened and the high-frequency switches c and d are opened.
Is closed, and the high frequency switches e and f in the switch group 2 are both opened. (F) A case where the high-frequency input signals A and B are combined and extracted as a high-frequency output signal B. As shown in FIG. 3 (f), the high frequency switches a and b in the switch group 1 are closed and the high frequency switches c and d are closed.
And the high frequency switches e and f in the switch group 2 are both opened, and the short-circuit point of the T branch stub on the impedance matching line 9 is normalized impedance. Adjust to the state of. When the operation state is switched between the above-described operation states (a) to (d) of the single supply of the high-frequency input signal, after the high-frequency switch to be closed by the switching is completed, the high-frequency switch to be opened by the switching is completed. Is characterized in that the high-frequency output signal to be taken out can be continuously obtained without being cut off instantaneously by releasing the signal. Thus, in the configuration shown in FIG. 1, each of the high-frequency input / output signals is supplied to or extracted from the switch groups 1 and 2 via the impedance matching line, Therefore, the synthesis or switching of the high-frequency signal set by opening and closing the high-frequency switch located at the other end of the impedance matching line is achieved without causing impedance mismatch to the signal source and the load. As a result, in the high-frequency synthesis switching device of the present invention, a bridge type distributor indispensable to the conventional device is not required, and a mechanical line length adjusting mechanism is used for switching of high-frequency signal supply to a main load such as a transmission antenna. There is no need for control components such as precision mechanical parts, insulating members, and motors. In addition, since the high-frequency switches constituting the switch group can be of a simple configuration that can be opened and closed independently, the combination switching operation can be performed instantaneously in a continuous state. (Effects of the Invention) As is apparent from the above description, according to the present invention, by using a relatively simple and small device, combining or switching the supply of a high-frequency two-input signal to a load can be performed by causing an instantaneous interruption of the supply. And a special effect that can be achieved instantaneously is obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing a configuration example of a high-frequency synthesis switching device of the present invention, FIG. 2 is a circuit diagram showing a configuration example of a high-frequency switch in the synthesis switching device, and FIG. 4) to 4 (f) are circuit diagrams sequentially showing respective operation states of the synthesis switching device, and FIGS. 4 and 5 are circuit diagrams respectively showing configuration examples of a conventional high frequency synthesis switching device. 1,2 ...... RF switches 3-9 ...... impedance matching line _{T IA, T IB, T OA} , T OB ...... contact L _a ~L _d ...... armature, C ...... dielectric S _a to S _d … Driving sticks 11,12,15… Bridge type combiner 13… Variable lines 14A-14C… Changeover switches 16,17… Absorption resistance

Claims (1)

(57) [Claims] 1. A first high-frequency switch group (2) configured by connecting two high-frequency on / off switches e and f in a half-bridge type
And a connection point between e and f of the high-frequency on / off switch as a first connection point, and terminals e and f of the high-frequency on / off switch on the side where e and f are not connected to each other. When two open terminals are provided, one end is connected to the first and second open terminals of the first high-frequency switch group (2), and the other end is connected to the first and second input terminals, respectively. Of two normalized impedances 1
One end is connected to the 1/2 wavelength line (4, 8) and the first connection point of the first high frequency switch group (2), and the other end is connected to the first connection point.
1/2 of the normalized impedance 1 connected to the output terminal of
A second high-frequency switch group (1) comprising a wavelength line (6) and connecting four high-frequency on / off switches a, b, c, d in a bridge type;
The connection point between a and c of the high-frequency on / off switch is a second connection point, the connection point between c and d is a third connection point, the connection point between d and b is a fourth connection point, and b. The connection point of a
, One end is connected to the second and fourth connection points of the second high-frequency switch group (1), and the other end is connected to the first and second input terminals, respectively. Two normalized impedance 1 1/2 wavelength lines (3,
7) a normalized impedance having one end connected to the third connection point of the second group of high-frequency switches (1) and the other end connected to the first output terminal. A line (5) in which quarter-wavelength lines each having 1 and 1 are connected in series, and one end connected to the fifth connection point of the second high-frequency switch group (1), and the other end connected to the second output. The short-circuit point of the T-branch stub connected to the terminal is mechanically moved to reduce the normalized impedance. A high-frequency synthesis switching device, further comprising a quarter-wavelength line (9) that changes the wavelength from 1 to 1.