JP2682492B2 - Multiwave common type non-stop wave synthesis switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to FM and UHF / VHF.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-wave shared type uninterruptible wave synthesizing and switching device which is used in a television broadcasting device and is capable of synthesizing different frequency signals or independently switching and connecting them.

[0002]

2. Description of the Related Art An example of a conventional device of this type is shown in FIG.
Shown in In this example, the frequency signals f1 and f2 are combined and switched. The signal source 31 of the frequency signal f1 is connected to the first switch 33, and the signal source 32 of the frequency signal f2 is switched to the second switch 34. A channel combiner 36 which connects the first switching device 33 and the second switching device 34 to each other and has isolation between the respective input terminals.
Connect to Further, the channel combiner 36 and the second switch 34 are connected to the third switch 35. This third
An antenna 37 and a dummy antenna 38 are connected to the switch 35. In addition, the first to third switching devices 33 to 3
Reference numeral 5 is for switching and connecting the terminals T1 and T3 to the terminals T2 and T4, respectively.

In this device, the first to third switching devices 3
The power feeding routes of the frequency signals f1 and f2 are switched depending on the switching states of 3 to 35. FIG.3 (b) is a figure which shows the state, for example, the 1st switch 33 is T1-T2,
The second switch 34 is T1-T2, and the third switch 35 is T1-.
The frequency signals f1 and f2 are combined in the channel combiner 36 and fed to the antenna 37 in a state where they are switched to be connected to T4 respectively. By switching the first switch 33 or the second switch 34 from this state, one of the frequency signals is fed to the antenna 37 and the other is fed to the dummy antenna 38. Therefore, the switching operation of these switching devices performs the nonstop wave combination switching operation.

[0004]

In such a conventional device, three switching devices and one channel combiner are required as the constituent parts, and the switching devices are switched by mechanical operation. This is an obstacle to the miniaturization of the device. In addition, since the structure of the channel combiner is complicated, this also becomes an obstacle in downsizing the device. Further, there is also a problem that a circuit component for connecting each switching device and the channel combiner to each other is required, the number of constituent components is large, and the cost is high.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the number of parts and to downsize each component so that the multi-wave sharing type uninterruptible wave synthesis switching can be configured as a small size and low cost as a whole. To provide a device.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a first coupler in which some terminals are first input terminals and the other terminals are first output terminals, and a first coupler. terminal is the second input terminal, first and some other terminal is connected to the second coupler is a second output terminal, between the conjugate terminals of the first and second coupler The second transmission line and the first
And two pairs of one-hole resonators, which are connected in the middle of each of the second transmission lines and have different resonance frequencies,
A phase shifter connected between the transmission line and the single aperture resonator and capable of switching the phase length between them is provided.

[0007]

In the present invention, the first input terminal has a first
A frequency signal of a frequency is input, a frequency signal of a second frequency different from the first frequency is input to a second input terminal, and each resonance frequency of a pair of one-hole resonators is the first frequency. , The second frequency. Furthermore,
The phase shifter connected to each single aperture resonator has λ1 / 4 and λ1 / 2, or λ, respectively for the wavelength λ1 of the first frequency f1 or the wavelength λ2 of the second frequency f2.
The phase length can be adjusted to 2/4 and λ2 / 2.
You .

[0009]

The phase length of the phase shifter connected to the one aperture resonator is switched between λ1 / 4 and λ1 / 2, and the phase length of the phase shifter connected to the other aperture resonator is λ2 / 4. And λ2 / 4, so that each single aperture resonator can function as a notch filter or a bandpass filter for the first and second transmission lines through which the first and second frequency signals are transmitted. This enables the first and second frequency signals to be selectively or combined and output to either the first output terminal or the second output terminal.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1A is a system diagram of an embodiment of the present invention.
This device comprises a first and a second pair of 3 dB couplers 11,1.
2, and the conjugate terminals of these couplers 11 and 12 are connected to each other by the first and second transmission lines 13 and 14, respectively. The signal source 15 of the first frequency signal f1 and the dummy antenna 16 are connected to the other terminal of the first coupler 11, and the signal of the second frequency signal f2 is connected to the other terminal of the second coupler 12. The source 17 and the antenna 18 are connected.

Further, the first and second single-hole resonators 19 and 20 are connected in the middle of the first transmission line 13, and similarly, the third and third one-hole resonators 19 and 20 are connected in the middle of the second transmission line 14. The fourth one-hole resonators 21 and 22 are connected to each other. Here, the first and third single-hole resonators 19 and 21
Is configured such that its resonance frequency is the frequency of the first frequency signal f1, and the second and fourth one-hole resonators 2
0 and 22 are configured such that the resonance frequency thereof is the frequency of the second frequency signal f2.

Further, first to fourth phase shifters 23 to 26 are connected between the first to fourth single aperture resonators 19 to 22 and the transmission lines 13 and 14, respectively.
These phase shifters 23 to 26 are configured such that the phase length (phase value) is variable, and the first and third phase shifters 23 and 25 and the second and fourth phase shifters 24 and 26 are interlocked with each other. The phase length is adjustable.

According to this configuration, each transmission line 13, 14
In the single-hole resonators 19 to 22 connected to, the phase length from each transmission line to the resonator is equal to the frequency fL (wavelength λ
When λL / 4 of l), the impedance ZL becomes infinite, and at this time, the resonator functions as a notch filter for the signal of the frequency fL transmitted through the transmission line. Further, when the phase length is λL / 2, the impedance ZL becomes 0, and at this time, the resonator has a frequency f
It functions as a bandpass filter for the L signal.

Therefore, in the configuration of FIG. 1, by adjusting the phase value in each of the first to fourth phase shifters, the first
Or by switching the phase length between each of the fourth single aperture resonators and each of the transmission lines to λ1 / 4 and λ1 / 2 or λ2 / 4 and λ2 / 4 (where λ1 and λ2 are frequency signals f, respectively).
1 and f2), it becomes possible to selectively connect the notch filter and the bandpass filter to the transmission line through which the frequency signal is transmitted. As a result, the frequency signal f1,
The f2 can be connected to the antenna or the dummy antenna or switched to the cutoff state.

FIG. 1B is a diagram showing the switching state, in which the phase lengths of the phase shifters 23 to 26 of the first to fourth single aperture resonators 19 to 22 are .lamda.1 / 4 and .lamda.1 / 2. ,
Alternatively, by switching between λ2 / 4 and λ2 / 2, both the signal sources 15 and 17 of the frequency signals f1 and f2 can be supplied to the antenna 1 together.
8 or the dummy antenna 16, or one of the signal sources is connected to the antenna 18 and the other is connected to the dummy antenna 1
6 can be connected, and the operation of the continuous wave synthesis switching can be performed.

That is, the first and third phase shifters 23, 25
The phase length of λ1 / 2, and the second and fourth phase shifters 24,
When the phase length of 26 is adjusted to λ2 / 4 respectively, the first
The third and third resonators 19 and 21 function as a bandpass filter for the frequency signal f1, and the second and fourth resonators 20 and 22 function as a notch filter for the frequency signal f2. As a result, the frequency signal f1
Is transmitted to the antenna 18 through the transmission lines 13 and 14. On the other hand, since the frequency signal f2 is totally reflected by the transmission lines 13 and 14, it is fed to the antenna 18.

On the contrary, the first and third phase shifters 23, 25
The phase length of λ 1/4, the second and fourth phase shifters 24,
When the phase length of 26 is adjusted to λ2 / 2,
The third and third resonators 19 and 21 function as a notch filter for the frequency signal f1, and the second and fourth resonators 20 and 22 function as a bandpass filter for the frequency signal f2. As a result, the frequency signal f1
Is totally reflected on the transmission lines 13 and 14 and fed to the dummy antenna 16, and the frequency signal f2 is transmitted to the transmission lines 13 and 14.
After passing through 14, the dummy antenna 16 is fed with electric power.

Further, the first to fourth phase shifters 23 to 2
When the phase lengths of 6 are adjusted to λ1 / 4 and λ2 / 4, respectively, the first and third resonators 19 and 21 act as notch filters for the frequency signal f1 and the second and fourth resonators, respectively. The resonators 20 and 22 act as a notch filter for the frequency signal f2. As a result, the frequency signals f1 and f2 are totally reflected by the transmission lines 13 and 14, and are fed to the dummy antenna 16 and the antenna 18, respectively.

On the contrary, the first to fourth phase shifters 19 to 2
When both the phase lengths of 2 are adjusted to λ1 / 2 and λ2 / 2, respectively, the first and third resonators 19 and 21 act as a bandpass filter for the frequency signal f1, and the second and fourth resonators 21 and 21 operate. Each of the resonators 20 and 22 acts as a bandpass filter for the frequency signal f2. As a result, the frequency signals f1 and f2 are both transmitted through the transmission line 1.
After passing through 3 and 14, power is supplied to the antenna 18 and the dummy antenna 16, respectively.

Therefore, this device does not require a switcher and a channel combiner, which are difficult to miniaturize and have a complicated structure, which makes it possible to miniaturize the device and simplify the configuration, and also reduce the cost. It will be possible. For example, as shown in FIG. 2, a phase shifter 23 is provided for the transmission line 13 (14).
(24 to 26) is composed of a pair of strip lines 27 and 28, and the single aperture resonator 19 (20 to 22) is composed of a dielectric resonator 30 coupled to the strip line.
It is also possible to construct the device together with the dB coupler on a single substrate, and it is possible to make the configuration extremely simple and compact.

In the figure, the phase shifter 23 (24 ...
26), strip lines 27 and 28 having different phase lengths of λL / 4 and λL / 2 are connected by a PIN diode 29 or the like, and the pair of strip lines 27 and 28 are used as the PIN diode 29 as a switching element.
By selecting, the phase length can be switched between λL / 4 and λL / 2. Further, by coupling the dielectric resonator 30 to the strip lines 27 and 28 of this phase shifter, a single aperture resonator is formed.

In the above embodiment, an example in which different frequency signals are fed to the antenna and the dummy antenna is shown. However, these antennas and the dummy antenna can be replaced with other components, for example, a transmission line or communication. It may be a device or the like.

[0023]

As described above, according to the present invention, two pairs of single-aperture resonances having different resonance frequencies are provided in the middle of the first and second transmission lines connected between the first and second couplers. Since a phase shifter is connected between the transmission line and the single-aperture resonator and the phase length between them can be switched, by adjusting the phase length, each single-aperture The resonator can be configured as a notch filter or a bandpass filter, and the signals input to each coupler can be selectively or combined and output. This eliminates the need for a switcher, a channel combiner, and the like, which are required in the conventional device, so that the device can be downsized and the configuration can be simplified.

According to the present invention, the frequency signal of the first frequency is input to the input terminal of the first coupler, and the frequency signal of the second frequency different from the first frequency is input to the input terminal of the second coupler. Is input, and the resonance frequencies of the single-hole resonators are set to the first frequency and the second frequency, respectively, to selectively or combine the first and second frequency signals and output the signals. Is possible.

Further, according to the present invention, the phase shifter connected to each single aperture resonator has a wavelength λ1 of a first frequency f1,
Alternatively, with respect to the wavelength λ2 of the second frequency f2, it is possible to adjust the phase length to λ1 / 4 and λ1 / 2, or λ2 / 4 and λ2 / 2, respectively, so that each single-aperture resonator can be adjusted to the first It becomes possible to function as a notch filter and a bandpass filter for each of the first and second frequency signals.

Further, by connecting an antenna to one of the outputs of the first or second coupler and a dummy antenna to the other, the first or second frequency signals are selectively or combined to form an antenna or a dummy antenna. Can be output to.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a systematic diagram of an embodiment of an apparatus of the present invention and a switching operation thereof.

FIG. 2 is a plan view showing an example of a phase shifter and a single aperture resonator according to the present invention.

FIG. 3 is a system diagram of a conventional device and a diagram for explaining a switching operation thereof.

[Explanation of symbols]

 11, 12 3 dB coupler 13, 14 Transmission line 15 Signal source of first frequency signal 16 Dummy antenna 17 Signal source of second frequency signal 18 Antenna 19-22 Single aperture resonator 23-26 Phaser 27, 28 Strip line 29 PIN Diode 30 dielectric resonator

Claims (3)

(57) [Claims] We claim: 1. Some of the terminal is the first input terminal a
1 frequency signal is input and the other part of the terminals is the first coupler having the first output terminal, and part of the terminals is the second input terminal and the second frequency signal is input. , A second coupler whose other terminal is a second output terminal, and a first coupler connected between the conjugate terminals of these first and second couplers .
And a second transmission line, and the first and second transmission lines
Connected in the middle of each of the first and second
Two pairs of one-hole resonators having different resonance frequencies corresponding to the frequency signals, and connected between each transmission line and each one-hole resonator to switch the phase length between them. A multi-wave shared type uninterruptible wave synthesizing switching device, comprising: 2. A phaser are connected to the respective first opening resonator, the wavelength λ1 of the first frequency f1 or the second,
With respect to the wavelength .lambda.2 of frequency f2, respectively .lambda.1 / 4 and .lambda.1 / 2, or .lambda.2 / 4 and .lambda.2 / 2 to the phase length adjustably constructed multi-wave shared type continuously wave-stopping Synthesis of claim 1 Switching device. 3. The multi-waveless continuous wave combining switching apparatus according to claim 1 or 2, wherein an antenna is connected to one of the first and second output terminals, and a dummy antenna is connected to the other.