JPS5941614Y2 - Broadband oscillator using dielectric resonator - Google Patents

Description

[Detailed description of the invention] The present invention relates to a transistor microwave band oscillation device.
In particular, it relates to a broadband oscillator using a dielectric resonator.

In a transistor oscillator controlled by a dielectric resonator, the oscillation frequency is determined by the shape of the dielectric resonator, and the frequency can be finely tuned using a frequency tuning rod.

For example, when the oscillation frequency of this oscillator is in the 5 GHz band,
Frequency tuning range with frequency tuning rod is at most 100Mtl
It is about z.

On the other hand, when three frequencies or signals of three frequencies separated by 100 MHz or more are required, this cannot be achieved with a single conventional dielectric resonator controlled transistor oscillator.

The purpose of the present invention is to improve the shortcomings of conventional devices and provide a wideband microwave oscillator.

According to the present invention, a transistor oscillator capable of oscillating at any frequency can be obtained by using one transistor and two or more dielectric resonators.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a block diagram illustrating an embodiment of the present invention.

One end i of the strip line 1 is connected to the base of the transistor 2 when the collector is grounded and the emitter is open, and the other end is connected to the terminator 3.

A dielectric resonator 4 is located at a distance t1 from the transistor,
A dielectric resonator 5 is attached at a distance t2, and the output is taken out from one end 10 of an output strip line 6 that couples the oscillation output.

Figure 2 is Figure 1 for explaining the structure of the present invention 0)A-
It is an A' sectional view, and FIG. 3 is a BB' sectional view thereof.

Dielectric resonators 4 and 5, supports 8 and 8', resonator support screws 9 and 8', input strip line 1, output strip line 6, frequency tuning rod 1 in metal case I.
2 and 12', and is covered with a metal cover 11.

The dielectric resonator 5 and the support 8 are bonded together, and the support 8 and the resonator support screw 9 are soldered or bonded.

Support 8 includes Teflon, RekiFlite, etc., which has a low attraction rate! The material used is Q).

Here, if the desired oscillation frequencies are fl and f2, the distance t1
is (2m-1)λ1/4.4 is (2n-1)λ2/4
shall be selected.

However, λ1 is the line wavelength at fl, λ2 is the line wavelength at f21, and m and n are positive integers.

When a signal of oscillation frequency f1 is required, only the dielectric resonator 4 is coupled to the input/output lines 1 and 6, and the resonator support screw 9 of the dielectric resonator 5 is fully pulled out from inside the case T. .

When the dielectric resonator and the input/output line are coupled, the spacing between the dielectric resonators shown in FIG. 2 may be set to 2 to 3 iit, and when the dielectric resonator is not coupled, the spacing may be set to 10m11 or more.

Conversely, when a signal of oscillation frequency f2 is required, only the dielectric resonator 5 is coupled to the input/output line, and the dielectric resonator 4 is sufficiently drawn out from inside the case T.

The adjustment method is as follows.

The degree of coupling between the dielectric resonators 4 and 5 and the strip lines 1 and 6 is adjusted, and the resonator support screws 9 and 9' are fixed to the metal cover 11 at a position near the desired oscillation frequency, and the frequency tuning rod 10 or 10 is fixed. ′ performs frequency fine tuning.

As a result of an experiment using the configuration of this invention, for example, t('x10
mm (λ/4 of 4GHz), t2 is 60tnm (6
3λ/4 of GHz), and the diameter of each resonator is 12
mW (4 GHz) t 9" (6 GHz,), and the oscillation output of the side closer to the strip line is approximately 66
It was possible to extract the frequency from Bm t 4.5 Gtlz to 6.2 GHz.

In addition, at 5Gf (z), an oscillation output of about 10 dBm could be obtained with a resonator of 10.5 m + 11 diameter.

Note that in order to obtain yet another frequency f3 with the same oscillator, the distance t3 from the transistor 2 must be (2 to 1) λ,
The third dielectric resonator may be installed at the position of , /4.

However, λ3 is the line wavelength at f3, and K is a positive integer.

Similarly, if you need a signal for the bedding liquid (2P-1)
A dielectric resonator may be installed at a position of λn/4, and only the resonator of the desired frequency may be coupled.

As explained above, according to the present invention, by using one transistor and two or more dielectric resonators, it is possible to obtain a signal of any frequency with one oscillator, and it is small and highly stable. Moreover, a broadband microwave oscillator can be realized.

[Brief explanation of drawings]

Figure 1 shows the constituent countries of the embodiment of this invention, and Figure 2 shows A of Figure 1.
-Avr plane view, and FIG. 3 is a BB' cross-sectional view. In the figure, 1...input strip line, 2...
...Transistor, 3...Terminator, 4 and 5...Dielectric resonator, 6...Output strip line, 7...Metal Case, 8 and 8' - Support, 9 and 9'...
Resonator support screw, 10...Output terminal, 11...
...Metal cover, 12...0 which is frequency tuning rod

Claims (1)

[Scope of utility model registration request] an oscillation circuit including a transistor, a first strip line to which one terminal of the transistor is connected and which is a part of the oscillation circuit; A plurality of dielectric resonators that are each fixed to adjustment rods that can be spaced close to each other and resonate at different frequencies, and a second strip line that is arranged in parallel with these resonators and extract an output signal. and each of the dielectric resonators is installed at a distance from the terminal of the transistor to an odd multiple of a quarter wavelength of a predetermined oscillation frequency, and one of the resonators is connected to the strip line. To broadband oscillation using a dielectric resonator, which is characterized by extracting the oscillation frequency that resonates with the resonator when it is placed close to the resonator.