JPS58139502A - Resonator - Google Patents

Abstract

PURPOSE:To miniaturize an oscillator, by positively making use of the inside of a strip line loop and providing a passive element, an active element, a terminal, etc. at the inside of said loop. CONSTITUTION:An earth conductor 2 is formed on the rear side of a dielectric substrate 1, and an exposed conductor 3 is formed on the surface side of the substrate 1. These conductors 3 and 2 are connected to each other by a cylindrical conductor 5 which is formed with adhesion to the inner surface of a hole 4 drilled through the substrate 1. A loop-shaped belt conductor line (strip liie) 6 is attached around the conductor 3, and both terminal parts 7 and 8 of the line 6 are terminated at the area close to each hole 4. The length of the line 6 is set at 1/4 wavelength of oscillating frequency. Then a resonance phenomenon is produced by the equivalent inductance L of the line 6 and the electrostatic capacity C of a capacitive element 9 which is connected between a part of the line 6 and the conductor 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a resonator, particularly a small resonator used for oscillating frequencies in the UHF and VHF bands.

In order to construct an oscillator with high spectral purity and low noise in the UHF and VHF bands, a distributed constant line with a high Q is used. There are two types of distributed resonant circuits used as oscillators: λ/2 type and λ/4 type (λ is wavelength).
Even with the λ/4 type, which allows the oscillator to be made smaller, the wrinkle length distribution constant i11 is about 1/4 wavelength of the oscillation frequency! The length of this distributed constant line placed a limit on how small the oscillator could be made.

Conventionally, as a means to reduce the size of an oscillator, the back side of a resonator with a double-sided printed wiring board structure in which both sides of a single host substrate are made of conductive foil is grounded, and the length of λA formed on the front side is An engineering university was working on bending a strip-shaped conductor (strip line) into a loop to minimize the resonance gain. However, in order to function as an oscillator, in addition to the resonator, some passive elements, an active collector, and terminals for supplying power to the straw elements are required. UHP band and V
In a small HF band oscillator, the area occupied by these elements is non-negligible compared to a resonator with a fake strip line, and in conventional oscillators, the size of the resonator is reduced. Although the stripline may be configured in a loop, the roots of the stripline are not actively utilized (7), so the
f2 Elements such as dynamic elements, active elements, and terminals must be placed outside the stripline loopc-5zu1
There was a drawback that the oscillator could not be made smaller.

The invention is to form the strip line constituting the resonator into a loop shape, and to actively utilize and excavate the roots of the IJ's line, as well as to create passive elements, active elements, terminals, etc. The structure is arranged inside the upper loop, which can promote miniaturization of the oscillator.
The purpose is to provide chinese ware 4). Therefore, the present invention provides a dielectric layer substrate having four conductors on the front surface and a ground conductor on the back surface, and at least one hole is formed in the substrate. The 111 river conductor on the front surface and the ground conductor on the back surface are connected to each other through a cylindrical conductor formed in a dense layer on the inner surface of the power visiting element I-.
a substrate, a strip line formed on the surface of the electrically shielding layer substrate, which is also formed in a loop shape so as to surround the exposed conductor, and whose both ends terminate near the -hilP hole; and the strip line. The present invention is characterized in that it is equipped with a volume injection element connected between a portion of the strip line and the exposed conductor, and that the oscillation circuit component can be placed inside the strip line formed in a loop shape. . I will explain the details below with reference to the drawings.

Fig. 1 shows an embodiment of the configuration of a resonator according to the present invention 1'A1 Fig. 2 is a cross-sectional view of A and -A in Fig. 1, and Fig. 3 shows an oscillator constructed using the resonator according to the present invention. - An explanatory diagram of the implemented circuit, FIG. 4 is an explanatory diagram of the 0I11 plane of FIG. 3, FIG. 5 is a circuit diagram showing the oscillation circuit of FIG. 3, and FIG. 6 is another implementation of the resonator according to the present invention. An example configuration diagram, FIG. 7 is a configuration diagram of an oscillator constructed by embedding an integrated circuit in a resonator according to the present invention, and FIG. 8 is a sectional view thereof.

In FIGS. 1 and 2, a ground conductor 2 made of conductive foil is formed on the back surface of a dielectric J-substrate 1. As shown in FIG. A conductor foil of an exposed conductor 3 is formed on the surface of the dielectric substrate 10, and the exposed conductor 3 and the ground conductor 2 are connected to the inner surfaces of, for example, two holes 4 drilled in the dielectric layer substrate 1. They are joined and connected by a single-shaped conductor 5 formed by dipping in honey. The ground conductor 2 and the exposed conductor 3 are connected to each other by a conductor 5 in the shape of a 1-shaped conductor 5, which is formed by means such as through holes or plating. A loop-shaped strip conductor line (strip line) 6 surrounding the exposed conductor 3 is formed on the surface of the dielectric JWI substrate 1, and the IJ tube line 6 is Both ends 7.8 are terminated in the vicinity of each of the holes 4, and
Its length is about 1/4 wavelength of the oscillation frequency. A resonance phenomenon is caused by the equivalent inductance L of the strip line 6 and the zero capacitance of the capacitive element 9 connected between a portion of the strip line 6 and the exposed conductor 3.

Note that by using a variable capacitance diode as the capacitive element 9 and changing the voltage applied to the variable capacitance diode, it is also possible to form a voltage variable resonator. The conductor foil such as the strip line 6 may be formed by using a printed circuit board, and the conductor foil may be attached by means of a wire.

An example in which the resonator configured as described above is applied to an oscillator will be explained with reference to FIGS. 3 and 4.

In FIGS. 4 and 5, numerals 9 to 9 correspond to those in FIGS. 1 and 2. For example, a hermetic seal-like terminal 10.11 is fitted into each hole 4 whose inner surface is formed of a cylindrical conductor 5, and the terminal 10.11 is insulated from the cylindrical conductor 5, that is, the ground conductor 2. There is. A coil 12 is connected as shown in FIGS. 3 and 4 between an end s7, which is the terminal end of the strip line 6 constituting the resonator, and the terminal 10, and an end 8, which is the terminal end of the strip line 6, is connected as shown in FIGS. is the collector of the transistor 13 and the capacitor 15
．． One end of 16 is connected. And above with the pace of transistor 13 above! The other end of the capacitor 15 is connected to the exposed conductor 3, and the emitter of the transistor 13 is connected to the rectangular land 1 formed on the surface of the dielectric substrate 1.
Connected to 4. The other end of the capacitor 16 is connected to the rectangular land 14, and the rectangular land 14
A coil 17 is connected between the terminal 11 and the terminal 11 as shown in FIGS. 3 and 4, respectively. Opening wave oscillation 1 is generated through 18 small strips drawn out from the rectangular land 14.
The signal is connected to the output terminal. Note that the current voltage (d protruding to the back side of the dielectric layer substrate 1/r, terminals 10, 1
1.

The active and passive elements of the transistors, coils, and capacitors that constitute the oscillation circuit are formed in a loop shape, as shown in FIGS. 3 and 4, and then connected by effectively using the inside of the strip line 6. This makes it possible to downsize the oscillator. In addition, since the cylindrical conductor 5 is completely connected to the ground conductor 2 formed on the back side of the dielectric substrate 1, the exposed conductor 3 provided inside the strip line 6 formed in a loop shape can be regarded as approximately the ground potential, and resonance due to the standing wave on the loop of the strip line 6 [the influence of the magnetic field is reduced.

FIG. 5 is a circuit diagram showing the oscillation circuit of FIG. 3, where the reference numeral 6 corresponds to that of FIG.
No. 17 corresponds to those shown in FIGS. 3 and 4. Reference numerals 14' and 18' represent the equivalent inductance of the rectangular land 14 and strip 18 in FIG.

FIG. 6 shows a configuration diagram of another embodiment of the resonator according to the present invention. If, a ground conductor (not shown) formed on the back side of the body layer substrate 19 and a land of the exposed conductor 21 formed on the front side of the dielectric layer substrate 190 are bonded. and exposed conductor 21
The strip line 22 surrounds the land in a U-shape, and both ends 2 of the strip line 220
Capacitors 25 and 26 are connected from 3.24 to the land of exposed conductor 21, respectively. Further, a variable capacitance diode 27, which is a permanent element, is connected from a part of the strip line 22 to the exposed conductor 210 land, and is a resonator whose oscillation frequency can be varied according to the voltage applied to the variable capacitor diode 27. It is shown. In this case as well, the parts constituting the oscillation circuit can be placed inside the loop-shaped strip line 22 using the hole 20 drilled in the dielectric layer substrate 19 and the land of the exposed conductor 21. can be made smaller.

FIG. 7 is a block diagram of an oscillator constructed by embedding an integrated circuit in a resonator according to the present invention, and FIG. 8 is a cross-sectional view of the oscillator. A ground conductor 36 formed on the back surface of the dielectric layer substrate 28 and an exposed conductor formed on the surface of the dielectric layer substrate 28 through the cylindrical conductor 35 formed in close contact with the inner surface of the hole 290. 30
are joined. A strip line 31 is formed in a loop shape so as to surround the exposed conductor 30,
A portion of the strip line 31 and the exposed conductor 30 are connected through a capacitive element 32 to form the entire resonator.

Inside the hole 29 made in the dielectric layer substrate 28, an integrated circuit 33 in which elements constituting an oscillation circuit are integrated, and a relay terminal 34 such as an in terminal are provided. Since the integrated circuit 33 in which elements constituting an oscillation circuit are integrated can be embedded inside the strip line 31 formed in a loop shape in this manner, the oscillator can be miniaturized.

Then, a cylindrical conductor 3 formed with a dense layer [2] is formed on the inner surface of the hole 29.
5 is a ground conductor 3 formed on the back surface of the dielectric m-substrate 28;
6, the integrated circuit 33 buried in the hole 29 and the strip line 31 are all excited by resonance.
There is little mutual interference between r and the magnetic field, and a stable oscillation signal can be obtained.

As explained above, according to the present invention, the structure is such that the inside of the strip line formed in the loop shape of the resonator is actively used, which promotes miniaturization of the oscillators of UHF fireflies and VHF emperors. It becomes possible to create a resonator that In addition, the inward direction of the hole drilled in the dielectric layer board of the resonator is completely electromagnetically shielded, so by passing the power supply terminal, etc. through this hole, it is possible to sufficiently prevent leakage of high-frequency signals from the terminal. becomes. If the entire resonator is subjected to Zirby, a high Q can be obtained.

By making the hole in the resonator even wider and burying an integrated circuit containing the elements necessary for oscillation inside the hole, it becomes possible to make a higher frequency oscillator extremely compact. In this case, the inside of the hole is shielded, reducing mutual interference between the integrated circuit and the resonant electromagnetic field.
More stable oscillation operation becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of a resonator according to the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, and FIG. 3 is an oscillator constructed using the resonator according to the present invention. 4 is an explanatory side view of FIG. 3, FIG. 5 is a circuit diagram showing the oscillation circuit of FIG. 3, and FIG. 6 is a configuration of another embodiment of the resonator according to the present invention. In Figure 7, 1 is a dielectric layer substrate, 2 is a ground conductor, 3 is an exposed conductor, 4 is a hole, 5 is a cylindrical conductor, 6t: i)
IJ tube line, 7 and 8 are ends, 9 is a capacitive element, 1
0°11 is a terminal, 12 is a coil, 13 is a transistor,
14 is a rectangular land, 14' is an equivalent capacitance f#, 15.16 is a capacitor, 17 is a coil, 18 is a strip, 18'
is the equivalent inductance, 19 is the dielectric layer substrate, 20 is the hole, 21 is the exposed conductor, 22 is the IJ tube line, 2
3.24th end, 25.26 is a capacitor, 27 is a variable capacitor i) i: diode, 28 is a dielectric layer substrate, 29 is a hole, 30 is an exposed conductor, 31 is a strip line, 32 is a capacitive element, 33 is an integrated circuit, 34 is a relay terminal, 35t-
, , are cylindrical conductors, 36 is a grounding conductor, and 37 is all adhesive. Patent applicant Anritsu Electric Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5, 6 Figure 922 / / Figure 7 Figure 8-13 =

Claims (1)

[Claims] A dielectric layer substrate on which an exposed conductor is formed on the surface and a ground conductor on the surface, a cylinder formed by having at least one hole bored therein and VFF bonded to the inner surface of the same size. a dielectric layer substrate in which the exposed conductor on the front surface and the ground conductor on the back surface are joined via a shaped conductor; A stripline formed in a loop shape and having both ends terminated near the hole; and a capacitive element connected between a portion of the stripline and the exposed conductor. resonator.