JPH0432804Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) This invention is related to a YIG (Yttrium Iron Garnet) resonator, and aims to stabilize the temperature of the YIG bulb and simplify the structure. be.

(Prior art) In a YIG resonator, a loop is arranged around the YIG sphere as described later, and when an external DC magnetic field H _p is applied to the YIG sphere and a high frequency input is applied to the loop, the YIG sphere , ω〓=|γ|H _p However, ω〓: resonance frequency, γ: resonance at magnetic rotation ratio.

By the way, the resonance frequency of the YIG ball changes depending on the temperature, but by aligning a certain axis of the YIG ball with the center axis of the support rod and fixing the YIG ball to the tip of the support rod,
When this support rod is rotated as an axis, a certain rotation angle position on a plane perpendicular to the axis changes depending on the temperature.
There is an axis of temperature stability where the resonance frequency of the YIG sphere does not change. For this reason, the YIG resonator has a structure in which the angle between the external DC magnetic field and the temperature stable axis can be adjusted by rotating the support rod.

However, in actual YIG resonators, adjusting the temperature stability axis by rotating the support rod is usually not sufficient to stabilize the resonant frequency;
Measures have also been taken to stabilize the temperature of the bulb itself.

FIGS. 4 to 7 show conventional YIG resonators in which the above-described means for stabilizing the resonant frequency are provided.

In Fig. 4, 1 is a YIG ball.
is fixed to one end of the The support rod 2 is made of a dielectric material with good thermal conductivity, and is rotatably supported by a split spring portion 4 of a heat generating block 3, which will be described later. Further, the heat generating block 3 is attached to the base 11 via a heat insulating support 7 having a two-part structure. 12 is a magnetic core, 13 is a coil,
14 is a loop placed around YIG ball 1, 15
is an external terminal connected to the loop 14, and a connector (not shown) is connected to the external terminal 15.

Figures 5 to 7 show the structure of the heat insulating support 7 and its internal parts in more detail.
In these figures, 3 is a heat generating block, and a heater 5 and a heat sensitive sensor 6 for temperature control are attached to the heat generating block 3, and the supporting rod 2 is rotatably supported at both ends thereof. At the same time, a split spring portion 4 for locking the support rod 2 at a required rotation adjustment position is formed.

The split spring portion 4 can freely rotate when a certain amount of torque is applied to the support rod 2, and also reliably stops and fixes the support rod 2 at the required rotation adjustment position. Because it is necessary,
In order to provide elasticity, its cross-sectional thickness is relatively small, and it is structured so that it comes into elastic contact with the support rod 2 at its tip.

As shown in FIG. 6, the heat insulating support 7 is divided into two pieces, and this two-piece structure supports the heat generating block 3 by sandwiching the stepped portions at both ends thereof. is fixed. A hole for pin insertion is provided between the heat insulating support 7 and the heat generating block 3, and a rotation stopper pin 9 is press-fitted into this hole to generate heat when adjusting the rotation of the support rod 2. Measures are taken to prevent block 3 from rotating.

Then, the rotation of the support rod 2 is adjusted so that the required temperature stable axis is obtained for the YIG ball 1, and at the adjusted rotation position, the support rod 2 is stopped and fixed by the elasticity of the split spring part 4, and then the heater 5 The YIG bulb 1 is maintained at a constant temperature via the split spring part 4 and the support rod 2 by the heat generating block 3 whose temperature is controlled to a constant temperature by the heat sensitive sensor 6, thereby stabilizing the resonance frequency. ing. At this time, the insulation support 7
Due to the heat insulating effect of the heat generating block 3, the heat from the base 1 is
There is no escaping to first place.

(Problem to be solved by the invention) In the conventional YIG resonator, the heat generating block 3
The support rod 2 is supported by split spring parts 4 formed at both ends of the split spring part 4.
In order to provide elasticity, the cross-sectional thickness of the rod is relatively small, and the tip has a structure in which it contacts the support rod 2 with a very narrow contact area. Therefore, it is not possible to reduce the thermal resistance between the split spring part 4 and the support rod 2, and the heat generating block 3
This was disadvantageous in stabilizing the temperature of the YIG bulb 1.

Further, the elastic support structure of the support rod 2 is a split spring structure as described above, and both ends of the heat generating block 3 through which the support rod 2 is inserted protrude outside from both ends of the heat insulating support 7. Due to this structure, the heat insulating support 7 is inevitably divided into two parts, and a rotation stopper pin 9 is press-fitted between the heat insulating support 7 and the heat generating block 3, resulting in a complicated structure. The point was hot.

This idea was made based on the above problems, and it reduces the thermal resistance between the heat generating block and the support rod, improves the temperature stability of the YIG bulb, sufficiently stabilizes the resonance frequency, and has a simple structure. The purpose of this study is to provide a YIG resonator that can be used for

[Structure of the device] (Means for solving the problem) In order to solve the above problem, this device was developed by YIG
It has a support rod 2 with a ball 1 fixed to one end thereof, and a through hole 17a through which the support rod 2 is rotatably inserted.
A heat generating block 17 for maintaining the YIG bulb 1 at a predetermined temperature, and a through hole 17a of the heat generating block 17
A support hole 1 through which the support rod 2 is inserted near both ends of the
6c, and is arranged between the heat insulating supports 16 and the heat generating block 17, and locks the support rod 2 in the support hole 16c via the heat generating block 17. Elastic member 18
It is characterized by having the following.

(Function) The heat-generating block is pressed by the elasticity of the elastic member disposed between the heat-insulating support and the heat-generating block, so that the support rod that passes through the heat-generating block is pushed against the support hole on the heat-insulating support. It is locked and fixed at the rotation adjustment position, and the angle of the temperature stable axis of the YIG bulb is adjusted. Thus, the heat of the heat generating block is transmitted to the YIG bulb via the support rod due to the elasticity of the elastic member.

In addition, the conventional split spring part is replaced with an elastic member, and this elastic member functions in the same way as a rotation stopper pin, eliminating the need for a pin and further eliminating the need for the insulation support to have a split structure. Therefore, the structure is simplified.

(Example) Hereinafter, an example of this invention will be described based on FIGS. 1 to 3.

In addition, in FIGS. 1 to 3, the fourth
Components, parts, etc. that are the same as or equivalent to those in the figures to FIG. 7 are designated by the same reference numerals as described above, and redundant explanations will be omitted.

First, to explain the configuration of the YIG resonator, in this embodiment, the heat insulating support 16 is not divided into two parts but is formed as a single piece, and the square hole 16 is formed in the center.
A is drilled in the vertical direction in FIG. Square hole 16a
A heat generating block 17 is loosely inserted between opposing wall portions 16b, 16b forming a vertical movement.
A through hole 17a is bored in the heat generating block 17,
Also, opposing wall portions 1 near both ends of the opening of the through hole 17a
Support holes 16c are drilled at key points of 6b, and the support rod 2 is rotatably inserted through these through holes 17a and 16c.

Further, a locking groove 16d is recessed in the center of the lower end of the opposing wall portion 16b, and a hole 17b is formed through the heat generating block 17 in correspondence with the locking groove 16d.
A rod spring 18 as an elastic member is installed between 6d and the hole 17b. Due to the elasticity of the rod spring 18, the support rod 2 is moved through the heat generating block 17,
It is constantly biased in a direction perpendicular to its axial direction, that is, upward in FIG.

The heat insulating support 16, in which each member is assembled as described above, is fixed to the base 11 with screws 8.

Contrary to the above, the groove and hole for attaching the bar spring 18 may be recessed in the lower surface of the heat generating block 17, and the hole may be bored in the lower end of the opposing wall 16b. .

Since the YIG resonator of this embodiment is configured as described above, when the support rod 2 is rotated and adjusted so that the required temperature stable axis is obtained for the YIG ball 1, the rotation adjustment position is adjusted. , due to the elasticity of the bar spring 18,
The support rod 2 is locked and fixed to the support hole 16c of the heat insulating support 16, and the angle of the temperature stabilizing axis is adjusted.

In this way, due to the elasticity of the bar spring 18,
The heat of the heat generating block 17 heated to a predetermined temperature is reliably transferred to the YIG bulb 1 via the support rod 2.

In addition, in the YIG resonator of this embodiment, the split spring in the conventional example is replaced with a bar spring 18, and this bar spring 18 functions equivalently to a rotation stopper pin, eliminating the need for a pin. 16
Since it is not necessary to have a two-part structure, the structure can be simplified.

[Effects of the invention] As explained above, according to this invention, the split spring part that hinders heat conduction in the conventional technology is eliminated, and YIG
Heat was transferred by pressing the hole in the heat generating block directly against the support rod using the spring force of the elastic member, so that heat could be transferred from the heater to the support rod.
The thermal resistance up to the YIG support rod is reduced, and the heat from the heat generating block heated to a predetermined temperature is reliably transferred to the YIG bulb, improving the temperature stability of the YIG bulb and sufficiently stabilizing the resonance frequency. can. Also,
The conventional split spring part is replaced with an elastic member, and this elastic member functions in the same way as a rotation stopper pin, eliminating the need for a pin.Furthermore, the insulation support does not need to be split into two, resulting in improved structure. This has the advantage of simplifying the process.

[Brief explanation of the drawing]

Fig. 1 is a plan view of essential parts showing an embodiment of the YIG resonator according to this invention, Fig. 2 is a cross-sectional view taken along the - line in Fig. 1, Fig. 3 is a view taken along arrow A in Fig. 1, and Fig. 4 is the conventional
A configuration diagram showing a YIG resonator, Figure 5 is a plan view of the heat insulation support device part in the conventional example above, and Figure 6 is a diagram showing the structure of the YIG resonator.
A view in the direction of arrow B in the figure, and FIG. 7 is a cross-sectional view taken along the - line in FIG. 1... YIG ball, 2... Support rod, 16... Heat insulation support, 16b... Opposing wall, 16c... Support hole,
17... Heat generating block, 17a... Through hole, 18
...A bar spring as an elastic member.

Claims (1)

[Scope of utility model registration request] A support rod 2 having a YIG ball 1 fixed to one end thereof, a heat generating block 17 having a through hole 17a through which the support rod 2 is rotatably inserted and for maintaining the YIG ball 1 at a predetermined temperature; 17 through holes 1
A heat insulating support 16 is provided with a support hole 16c near both ends of the support rod 7a, through which the support rod 2 is inserted. an elastic member 1 that locks the support rod 2 in the support hole 16c;
8. A YIG resonator comprising: