JPH0633699Y2 - Tuned oscillator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a tuning oscillator, and is suitable for use as a local oscillator of a microwave communication device, for example.

[Outline of device]

The present invention uses a ferrimagnetic resonance element as a resonator, and a magnetic oscillator for applying a magnetic field to the ferrimagnetic resonance element has a pair of yokes and a tuning oscillator having a coil mounted on one of these yokes, A terminal for the coil is provided on the yoke on which the coil is mounted. As a result, the tuning oscillator can be easily assembled.

[Conventional technology]

Conventionally, as a microwave tuning oscillator utilizing ferrimagnetic resonance of yttrium iron garnet (YIG) single crystal, microwave tuning oscillators as shown in FIGS. 7 and 8 are known. As shown in FIGS. 7 and 8, in this microwave tuned oscillator, the yoke of the magnetic circuit for applying a magnetic field to the YIG single crystal is composed of the upper yoke 11a and the lower yoke 11b. A main tuning coil 12 for applying a DC magnetic field and an FM coil 13 for applying an AC magnetic field are mounted on the upper yoke 11a. On the other hand, in the lower yoke 11b, a resonator using a YIG single crystal, a transistor as an active element for oscillation, a matching circuit for this transistor, a bias circuit for this transistor, etc. (all not shown) are placed on the dielectric substrate. Hybrid MIC (Micro
wave integrated circuit) substrate 14 is mounted.

In this microwave tuning oscillator, the terminals 15a and 15b for the main tuning coil 12 and the terminals 16a and 16 for the FM coil 13 are used.
b, terminals 17a and 17b for bias application of transistors, an output connector 18 and terminals 19a and 19b for heaters for keeping the YIG single crystal at a constant temperature are all provided on the lower yoke 11b. The terminals 17a and 17b are connected to the wires 20a and 20b, respectively.
The output connector 18 is connected to the MIC board 14 by a wire 21.

As a publicly known document related to the present invention, there is JP-A-61-257614 which discloses a tuning oscillator using YIG.

[Problems to be solved by the invention]

In the conventional microwave tuning oscillator described above, both the main tuning coil 12 and the FM coil 13 are the upper yoke 11
Terminals 15a, 15b, 16a, 1 for these main tuning coil 12 and FM coil 13 despite being mounted on a.
6b is provided on the lower yoke 11b. Therefore, when assembling this microwave tuning oscillator, the main tuning coil 12 and the FM coil 13 and their terminals 15a, 15b, 16 are provided.
When connecting a and 16b, the upper yoke 11a and the lower yoke 11b are indirectly connected. Therefore,
In this terminal arrangement, the continuity test of the main tuning coil 12 and the FM coil 13 must be performed in a condition in which the upper yoke 11a and the lower yoke 11b are indirectly connected and are difficult to handle. Furthermore, when the upper yoke 11a and the lower yoke 11b are joined by welding or screwing after this continuity test, the main tuning coil 12 and the FM coil 13 and their terminals 15a, 15b, 16a, 16b are disconnected from each other. Wiring between the coils 12 and 13 and the terminals 15a, 15b, 16a and 16b, and the wiring and the upper yoke 11a and the lower yoke 11b or MI.
There is a risk of short circuit with C.

For the above reasons, it has been difficult to assemble a microwave tuning oscillator in the past.

Therefore, an object of the present invention is to provide a tuned oscillator that can be easily assembled.

[Means for solving problems]

The present invention uses a ferrimagnetic resonance element as a resonator, and a porcelain circuit for applying a magnetic field to the ferrimagnetic resonance element has a pair of yokes (for example, an upper yoke 1a and a lower yoke 1).
b) and a coil mounted on one of these yokes (for example, the main tuning coil 2 and the FM coil 3), a coil terminal (for example, terminals 4a and 4b) is mounted on the yoke on which the coil is mounted. , 5a, 5b) and the yokes are not connected to each other by the wiring of the coil.

[Action]

According to the above-mentioned means, the yokes are not indirectly connected to each other by the wiring during the assembly, so that the coil continuity test can be easily performed. Further, when joining the yokes, it is possible to extremely reduce the risk of short-circuiting between the wirings connecting the coil and its terminals or between the wirings and the yokes. As a result, the tuning oscillator can be easily assembled.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are a plan view and a side view showing a microwave tuning oscillator according to an embodiment of the present invention. Also, the third
FIGS. 4 and 5 are bottom views showing the upper yoke of the microwave tuning oscillator shown in FIGS. 1 and 2 and AA in FIG.
FIG. 5 is a cross-sectional view taken along the line, FIG. 5 and FIG.
FIG. 3 is a plan view showing a lower yoke of the microwave tuning oscillator shown in FIGS. 2 and 2 and a cross-sectional view taken along line BB in FIG. 5.

As shown in FIGS. 1 to 6, in the microwave tuned oscillator according to the present embodiment, the yoke of the magnetic circuit for applying a magnetic field to the YIG single crystal is an upper yoke 1a made of a soft magnetic material such as permalloy. And the lower yoke 1b. In the upper yoke 1a, a main tuning coil 2 for applying a DC magnetic field is provided around the pole piece portion,
Further, the FM coils 3 for applying an alternating magnetic field are mounted at the tips of the pole pieces. Furthermore, a terminal 4a for the main tuning coil 2 is provided on one side surface of the upper yoke 1a,
4b is provided, and terminals 5a and 5b for the FM coil 3 are provided on the other side surface.
Is provided. Both ends of the main tuning coil 2 are connected to these terminals 4a and 4b, respectively, and both ends of the FM coil 3 are connected to terminals 5a and 5b, respectively.

On the other hand, in the lower yoke 1b, a resonator using a YIG single crystal (ferrimagnetic resonance element), a transistor as an active element for oscillation, a matching circuit for this transistor, a bias circuit for this transistor, etc. (all not shown) ) Is mounted on the dielectric substrate, and the hybrid MIC substrate 5 is mounted. Furthermore, the lower yoke 1b has the above-mentioned one side surface.
Terminal 6 for bias application to the transistor on MIC board 5
a to 6c are provided, and the output connector 7 is fixed to the other side surface by fixing its flange portion with screws 8a and 8b. These terminals 6a to 6c are connected to the MIC substrate 5 by wires 9a to 9c made of gold, for example. The center conductor 7a of the output connector 7 is the MIC board 5
It is connected to a microstrip line (not shown) provided above.

The microwave tuned oscillator according to the present embodiment configured as described above has the following advantages. That is, the upper yoke
The terminals 4a, 4b, 5a, 5b for the main tuning coil 2 and the FM coil 3 mounted on the 1a are provided on the upper yoke 1a, while those for the MIC board 5 mounted on the lower yoke 1b. Since the terminals 6a to 6c are also provided on the lower yoke 1b, the continuity test is performed in a difficult-to-handle state in which the upper yoke and the lower yoke are indirectly connected as in the above-described conventional microwave tuning oscillator. Unlike the case, the continuity test can be easily performed individually in a state where the upper yoke 1a and the lower yoke 1b are completely separated from each other and are easy to handle. When the upper yoke 1a and the lower yoke 1b are joined by welding or screwing, the main tuning coil 2 and the FM coil 3 are connected to each other and the wires connecting the terminals 4a, 4b, 5a and 5b are connected to each other. Wiring and upper yoke 1a and lower yoke
The risk of a short circuit between 1b and MIC can be minimized. As a result, the microwave tuned oscillator can be assembled much more easily than in the conventional case, and the productivity can be improved.

The embodiments of the present invention have been specifically described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made based on the technical idea of the present invention.

For example, terminals for main tuning coil 2 and FM coil 3
4a, 4b, 5a, 5b can be provided on a side surface of the upper yoke 1a different from the above-described embodiment, or can be collectively provided on one side surface, and further provided on the upper surface of the upper yoke 1a. It is also possible. Also, these terminals 4a,
4b, 5a and 5b can be collectively provided on one side surface of the tuning oscillator together with the terminals 6a to 6c provided on the lower yoke 1b.

[Effect of device]

According to the present invention, the yoke for mounting the coil is provided with the terminal for the coil, and the yokes are not connected by the wiring of the coil, so that the continuity test of the coil can be easily performed. At the same time, it is possible to minimize the risk of a short circuit between the wires that connect the coil and its terminals when joining the yokes, and between this wire and the yokes, etc. Therefore, the tuning oscillator can be easily assembled. You can

[Brief description of drawings]

FIG. 1 is a plan view showing a microwave tuning oscillator according to an embodiment of the present invention, FIG. 2 is a side view of the microwave tuning oscillator shown in FIG. 1, and FIG. 3 is shown in FIGS. FIG. 4 is a bottom view showing the upper yoke of the microwave tuned oscillator, FIG. 4 is a sectional view taken along the line AA of FIG. 3, and FIG. 5 is a bottom view of the microwave tuned oscillator shown in FIGS. FIG. 6 is a plan view showing the side yoke, FIG. 6 is a sectional view taken along line BB in FIG.
FIG. 7 is a plan view showing a state during assembly of a conventional microwave tuning oscillator, and FIG. 8 is a partial sectional view of the microwave tuning oscillator shown in FIG. Description of main symbols in the drawings 1a: upper yoke, 1b: lower yoke, 2: main tuning coil, 3: FM coil, 4a, 4b, 5a, 5b, 6a to 6c: terminals, 5: MIC
Board, 7: Output connector.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takahiro Ogihara Inventor Takahiro Ogihara 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (56) References JP-A-60-257607 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A ferrimagnetic resonance element is used as a resonator,
In a tuned oscillator having a pair of yokes and a coil mounted on one of the yokes, a magnetic circuit for applying a magnetic field to the ferrimagnetic resonance element is provided. A tuned oscillator, wherein terminals are provided and the yokes are not connected to each other by wiring of the coil.