KR0164095B1 - Stripline Circulators for Microwaves - Google Patents

Abstract

The present invention relates to a stripline circulator for microwaves.

More specifically, the present invention forms a magnetic field wall pattern for adjusting the amount of magnetic coupling in the center of the resonator of the stripline of the circulator, thereby miniaturizing the circulator, extending the bandwidth, and easily adjusting the magnetic wall. A stripline circulator for microwaves can be achieved and can simplify the manufacturing process.

The microwave stripline circulator of the present invention includes a ferrite block, stripline patterns and ground electrodes formed on the upper and lower ends of the ferrite block, upper and lower permanent magnets and upper and lower permanent magnets positioned on the upper and lower portions of the ferrite block, and the upper permanent. In a microwave stripline bonded circulator comprising a Teflon inserted between a magnet and a stripline, and a thin iron plate formed between a lower permanent magnet and a ground electrode, the stripline is a broadband Y-type resonator which resonates at a constant frequency. 101, a plurality of external circuit connecting electrodes 102a, 102b, and 102c for connecting the Y-type resonator 101 to an external circuit and attached to the aforementioned Y-type resonator 101, It is formed to be symmetrical with the resonator 101 in the inner center of the 101 is composed of the magnetic field wall pattern 103 for adjusting the coupling amount for adjusting the magnetic coupling amount .

Description

Stripline Circulators for Microwaves

1 is a schematic configuration diagram of a conventional stripline circulator, (a) is a plan view of the circulator, (b) is a side view, (c) is an electrode pattern diagram of the stripline.

2 is another pattern diagram of a stripline for a conventional circulator.

3 is a pattern diagram of a stripline for a circulator in accordance with a preferred embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

1 ferrite block 2 stripline pattern

3: earthing electrode 4: upper permanent magnet

5: lower layer permanent magnet 6: teflon

7: iron plate 8: circular resonator

9a, 9b, 9c: electrode 11: circular resonator

12: slot 13a, 3b, 13c: electrode

101: wideband Y-type resonator

102a, 102b, 102c: electrode for external circuit connection

103: magnetic field wall pattern for adjusting the coupling amount

The present invention relates to a stripline circulator for microwaves.

More specifically, the present invention forms a magnetic field wall pattern for adjusting the amount of magnetic coupling in the center of the resonator of the stripline of the circulator, thereby miniaturizing the circulator, extending the bandwidth, and easily adjusting the magnetic wall. A stripline circulator for microwaves can be achieved and can simplify the manufacturing process.

Microwave circulators are devices that use the irreversibility of permanent magnets and ferrites, and are widely used for device protection, impedance matching, and the like in RF transceivers of mobile stations and base stations in wireless systems such as cordless telephones (CTs) and portable telephones.

Such circulators can be classified into circulators using gyre letters and junction circulators. However, recently, three-terminal stripline circulators are mainly used among junction circulators.

FIG. 1 is a schematic configuration diagram of a conventional general stripline circulator. FIG. 1 (a) shows a plan view of the circulator, FIG. 1 (b) shows a side view, and FIG. 1 (c) shows a diagram of the first (a). An electrode pattern diagram of the stripline for the circulator.

As shown in FIG. 1, the conventional three-terminal stripline circulator includes a stripline pattern 2 and a ground electrode 3 formed on the upper and lower ends of the ferrite block 1, and the ferrite block 1 ), Upper and lower permanent magnets (4) and lower permanent magnets (5) are located at the top and bottom of the upper part, and a Teflon (6) is inserted between the upper permanent magnet (4) and the stripline (2), and the lower permanent magnets ( A thin iron plate 7 is inserted between 5) and the ground station 3.

At this time, the electrode pattern of the strip line (2), as shown in the first (c), a circular resonator (8) is formed in the center at a constant frequency, the circular resonator (8) connected to the external circuit The first electrode 9a, the second electrode 9b, and the third electrode 9c, which are three symmetrical and three ports, are attached to the circumference of the circular resonator 8 so as to be disposed.

In the stripline circulator having the above-described configuration, due to the shape of the stripline 2 on the ferrite block 1 and the irreversible characteristics of the upper permanent magnet 4 and the lower permanent magnet 5, the signal of the external circuit is clockwise. The signal is transmitted from the first electrode 9a forming the first port to the second electrode 9b forming the second port, while the signal is not transmitted to the third electrode 9c forming the third port. While the signal is transmitted from the second electrode 9b to the third electrode 9c, the first electrode 9a is isolated and the signal is transmitted from the third electrode 9c to the first electrode 9a, while Since the two electrodes 9b are isolated, they function as circulators.

At this time. The signal transmission direction can also be set counterclockwise.

However, in the conventional stripline circulator using the circular resonator 8 of the type described above, the size of the circular resonator 8 is determined according to the resonance frequency, and as the frequency increases, the size of the circular resonator 8 decreases. The size of the circular resonator 8 has to be reduced in order to use it in the frequency band of UHF, but it is difficult to manufacture a small circulator due to the limitation in size reduction of the shape of the circular resonator 8.

In addition, the above-described conventional stripline circulator adjusts the coupling angle between the circular resonator 8 and the electrodes 9a, 9b, and 9c connecting the external circuits to adjust the bandwidth of the frequency passband. It was difficult to expand.

Therefore, in accordance with the development of communication systems and the miniaturization of systems, the stripline can be easily miniaturized and the bandwidth of the frequency pass band can be easily extended to be effectively used in the UHF band, which is a frequency for mobile communication or personal communication. Research has been actively conducted to develop a circulator having a shape, and a typical conventional stripline pattern shape is shown in FIG. 2.

FIG. 2 is a view showing another pattern shape of a stripline for a conventional circulator. As shown in FIG. 2, the stripline of a conventional circulator is a circular resonator 11 which resonates at a constant frequency in an electrode pattern. ) Is formed in the center, and three slots 12 are formed in the center direction of the circumference of the circular resonator 11 to reduce the size of the resonator 11 and to adjust the amount of magnetic coupling, and the resonator 911 ), A first electrode 13a, a second electrode 13b, and a third electrode 13c, which form three symmetrical ports for connecting the resonator 11 with an external circuit, are attached to the circumference.

In the conventional stripline circulator having the above-described configuration, since the magnetic field wall is formed in the slot 12 of the stripline, it can be miniaturized at the same frequency as compared to the stripline of FIG. 1, and the length of the slot 12 By adjusting, the miniaturization of the circulator can be pursued.

However, the conventional circulator has a limitation in extending the bandwidth by adjusting the coupling angle between the circular resonator 1 and the electrodes 13a, 13b, and 13c connecting the external circuit, and the slot for forming the magnetic field wall. The formation of (12) had a problem in that the manufacturing process was very complicated in order to achieve three symmetry of the slot 12 to perform a function as a circulator.

After all, the present invention is to solve the above problems of the prior art, an object of the present invention can achieve the miniaturization of the stripline circulator, the expansion of the bandwidth and the easy adjustment of the magnetic field wall, and simplify the manufacturing process To provide a microwave stripline circulator.

Microwave stripline circulator of the present invention to achieve the above object is a ferrite block, stripline pattern and ground electrode formed on the upper and lower ends of the ferrite block, upper and lower permanent magnets and lower layers located on the upper and lower In a microwave stripline bonded circulator consisting of a permanent magnet, a teflon inserted between an upper permanent magnet and a stripline, and a thin iron plate inserted between a lower permanent magnet and a ground electrode, the stripline is formed at a constant frequency. A wideband Y-type resonator which resonates, a plurality of external circuit connection electrodes for connecting the Y-type resonator to an external circuit, and the aforementioned Y-type resonator are formed to be symmetrical with the resonator in the inner center. It consists of a magnetic field wall pattern for adjusting the amount of binding to adjust the amount of magnetic field coupling Gong.

Hereinafter, a preferred embodiment of the microwave stripline circulator of the present invention will be described in more detail with reference to the accompanying drawings.

3 is a pattern diagram of a stripline for a circulator according to a preferred embodiment of the present invention. As shown in FIG. 3, the stripline circulator of the present invention is a microwave stripline bonded circulator. Electrode for connecting a plurality of external circuits for connecting the Y-type resonator 101 with an external circuit by installing the wideband Y-type resonator 101 and the Y-type resonator 101 where the strip line resonates at a constant frequency. 102a, 102b, and 102c, and a magnetic field wall pattern 103 for adjusting the coupling amount to adjust the magnetic coupling amount by being formed symmetrically with the resonator at the inner center of the aforementioned Y-type resonator 101.

At this time, the stripline of the present invention can be configured in a multi-terminal form having three or more terminals, the magnetic field wall pattern 103 for adjusting the coupling amount may be formed in any shape symmetrical with the resonator 101. Can be.

In the stripline circulator of the present invention having the above-described configuration, as shown in FIG. 3, the coupling angle 104 between the Y-type resonator 101 and the electrodes 102a, 102b, 102c for connecting the external circuit can be formed large. Therefore, it is possible to achieve a wider bandwidth without forming a stripline for additional terminal or bandwidth extension to the outside, and by adjusting the size when forming the magnetic field wall pattern 103 for adjusting the coupling amount, appropriately adjusting the coupling amount by the magnetic field It can adjust the miniaturization and isolation characteristics.

In addition, the stripline circulator of the present invention can easily achieve three symmetry by forming the coupling amount control magnetic field wall pattern 103 in the center of the Y-type resonator 101, thereby simplifying the overall manufacturing process of the circulator It is possible to manufacture a circulator economically.

Therefore, the stripline circulator of the present invention can be used for device protection and impedance bonding of systems and terminals in mobile communication, personal communication, CT and satellite communication, and can realize miniaturization and low cost of systems and terminals. .

Claims (1)

A ferrite block, stripline patterns and ground electrodes formed on the upper and lower ends of the ferrite block, upper and lower permanent magnets located above and below the ferrite block, teflon formed between the upper permanent magnet and the stripline, In the microwave stripline bonded circulator made of a thin iron plate inserted between a lower permanent magnet and a ground electrode, the stripline includes a wideband Y-type resonator 101 which resonates at a constant frequency, and an electric Y-type resonator ( A plurality of external circuit connecting electrodes 102a, 102b and 102c for connecting the Y-type resonator 101 to an external circuit, and a resonator 101 at the inner center of the aforementioned Y-type resonator 101. A strip line for microwaves, characterized in that it is formed to be symmetrical with the magnetic field wall pattern 103 for controlling the amount of coupling for controlling the amount of magnetic coupling Particulate concentrator.