KR101757974B1 - Unequal Gysel power divider - Google Patents

Unequal Gysel power divider Download PDF

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KR101757974B1
KR101757974B1 KR1020150075212A KR20150075212A KR101757974B1 KR 101757974 B1 KR101757974 B1 KR 101757974B1 KR 1020150075212 A KR1020150075212 A KR 1020150075212A KR 20150075212 A KR20150075212 A KR 20150075212A KR 101757974 B1 KR101757974 B1 KR 101757974B1
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transmission line
asymmetric
impedance
type circuit
rti
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KR20160139753A (en
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김영
심석현
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금오공과대학교 산학협력단
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports

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Abstract

The present invention is characterized in that an isolation termination resistor is connected across the transmission line

Figure 112015051598110-pat00071
Type circuit having a T-shaped circuit that converts a circuit connecting one isolation resistor to the center of a transmission line and a circuit connected in parallel with another dummy transmission line to reduce a resistance connection space.
According to the present invention described above, there is an effect of reducing the space-used area required for installing the terminating resistor while having equivalent electrical characteristics as compared with the conventional technology, thereby achieving the advantage of reducing the material cost.

Description

{Unequal Gysel power divider}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asymmetric ge cell power divider, and more particularly, to an asymmetric ge-cell power divider having a T-shaped circuit connecting a resistor connected in the center of a transmission line and a transmission line connected in parallel with the circuit. Power divider.

Power splitters are a key component of RF / microwave systems. Among the power dividers, the gypse power divider has advantages in the field of high power devices. The asymmetric zeolite power divider can be used as a power combiner or an asymmetric Doherty amplifier or a feed system for phased array antennas. The asymmetric zeolite power divider has been studied in a variety of forms characterized by size reduction, high distribution ratio, dual band operation, and the like.

Conventional asymmetric zeolite power dividers use two termination resistors having different values to satisfy the isolation performance between the output terminals. However, when driving the power divider with a standard impedance of 50 ohms (ohms), the high power termination resistor could not be defined to any value. In addition, since the termination resistor has a large volume, a space is required for installing the termination resistor.

Lee, Young-chul, "Design of High Power X-band SSPA Using Gysel Power Coupler", Journal of the Institute of Electronics and Communication Engineers Volume 9, Issue 4 (published Apr. 201, 2014)

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-described problems of the prior art,

Figure 112015051598110-pat00001
Type circuit having a T-shaped circuit that converts a circuit connecting one isolation resistor to the center of a transmission line and a circuit in which other transmission lines are connected in parallel to reduce a resistance connection space.

According to an aspect of the present invention, there is provided an asymmetric ge- ocellular power divider having a T-type circuit, the T-type circuit comprising: one input terminal to which a power signal is input; And two output terminals to which electric power is distributed at a constant rate. The output terminal includes two first and second transmission lines, one end of which is connected to the first output terminal and the other end is connected to the second output terminal in parallel, transmission line); And a shunt resistor, wherein the shunt resistor is connected at one end to a contact with the second transmission line and at the other end to a ground, respectively.

The electrical length of the transmission line is? / 2, and? Is a wavelength of the power signal input to the input terminal.

The value of the shunt resistance is a characteristic impedance value Z0, and the impedance value of the first transmission line is

Figure 112015051598110-pat00002
Wow
Figure 112015051598110-pat00003
And the impedance value of the second transmission line is
Figure 112015051598110-pat00004
Wow
Figure 112015051598110-pat00005
, And the power distribution ratio is
Figure 112015051598110-pat00006
/
Figure 112015051598110-pat00007
, And
Figure 112015051598110-pat00008
Wow
Figure 112015051598110-pat00009
Are respectively a multiple of the characteristic impedance z0
Figure 112015051598110-pat00010
= pZ0 ,
Figure 112015051598110-pat00011
= qZ0.

Meanwhile, the asymmetric zeolite power divider

Figure 112015051598110-pat00012
Satisfies the condition of
Figure 112015051598110-pat00013
, R3 is the shunt resistance value of the T-type circuit,
Figure 112015051598110-pat00014
The
Figure 112015051598110-pat00015
Type circuit is a value of one of the termination resistors,
Figure 112015051598110-pat00016
Type circuit is equivalent to the T-type circuit.

remind

Figure 112015051598110-pat00017
Type circuit includes one input terminal to which a power signal is input; And one output line having a length of? / 4 connected at one end thereof to the first output terminal and the other end thereof connected to the second output terminal, and two output terminals to which electric power is distributed at a constant rate; And two first and second termination resistors, one end of which is connected to the first output terminal and the other end is connected to the ground, respectively, and the second termination resistor has one end connected to the second output terminal, And the other end is connected to the ground.

According to the present invention described above, there is an effect of reducing the space-used area required for installing the terminating resistor while having equivalent electrical characteristics as compared with the conventional technology, thereby achieving the advantage of reducing the material cost.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a diagram illustrating an asymmetric zircell power divider in accordance with a preferred embodiment of the present invention.
FIG. 2 is a block diagram of an asymmetric zirconia power divider according to a preferred embodiment of the present invention.

Figure 112015051598110-pat00018
Type circuit to a T-type circuit.
3 is a diagram illustrating a change in impedance value of the other end according to a change in impedance value and power distribution ratio at a transmission line end in an asymmetric zirconia power divider according to a preferred embodiment of the present invention.
FIG. 4 is a photograph illustrating an asymmetric zirconia power distributor fabricated according to an embodiment of the present invention; FIG.
5 is a graph showing measured S parameters of an asymmetric zircell power divider in accordance with an embodiment of the present invention.
FIG. 6 is a graph illustrating a measurement result of harmonic characteristics of an asymmetric geilerial power divider according to an embodiment of the present invention. FIG.

The present invention is characterized in that an isolation termination resistor is connected across the transmission line

Figure 112015051598110-pat00019
Type circuit is connected to a dummy transmission line connected in parallel with the circuit and a circuit in which one isolation resistor is connected to the center of the transmission line and the asymmetrical geiler-based power divider is converted into a circuit.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an asymmetric zircell power divider according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an asymmetric zircell power divider according to a preferred embodiment of the present invention.

The asymmetric zeolite power divider includes a T-type circuit constituting one input terminal, two output terminals and one shunt resistor.

As shown in Fig. 1, a power signal to be distributed is input to the input terminal P1. And a power signal distributed at a predetermined ratio is output to the two output terminals P2 and P3. Two transmission lines Zc and Zo1 are connected between the input terminal P1 and the first output terminal P3 and two transmission lines ZD and Zo2 are connected between the input terminal P1 and the second output terminal P2. One side of one transmission line Zo3 may be connected to the contact of the two transmission lines Zc and Zo1 and one side of one transmission line Zo4 may be connected to the contact of the two transmission lines ZD and Zo2. The T-type circuit has two connection terminals, and the two connection terminals can be connected to the other side of the transmission line Zo3 and the other side of the transmission line Zo4.

And the T-type circuit may include first and second transmission lines and a shunt resistor R3 connected in parallel between two connection terminals. The shunt resistor R3 may be connected at one end to a contact with the second transmission line and at the other end to ground.

The first transmission line

Figure 112016108584603-pat00078
A partial transmission line having an impedance of < RTI ID = 0.0 >
Figure 112016108584603-pat00079
And the second transmission line is implemented as a partial transmission line having an impedance of
Figure 112016108584603-pat00080
A partial transmission line having an impedance of < RTI ID = 0.0 >
Figure 112016108584603-pat00081
A partial transmission line having an impedance of < RTI ID = 0.0 > Thus, the impedance value of the first transmission line is
Figure 112016108584603-pat00020
Wow
Figure 112016108584603-pat00021
Lt; / RTI > The impedance value of the second transmission line is
Figure 112016108584603-pat00022
Wow
Figure 112016108584603-pat00023
As shown in FIG. The impedance value of the second transmission line is set to a value of
Figure 112016108584603-pat00024
And
Figure 112016108584603-pat00025
And a partial transmission line having a plurality of partial transmission lines.

The asymmetric ge cell power divider having the T-type circuit shown in FIG. 1

Figure 112015051598110-pat00026
And may be equivalently transformed in an asymmetric zeolite power divider having a type circuit.

Hereinafter, a preferred embodiment of the present invention will be described.

Figure 112015051598110-pat00027
Type circuit to the T-type circuit will be described in detail with reference to FIG.

As shown in FIG. 2A,

Figure 112016108584603-pat00082
Of asymmetric zirchelic power divider with
Figure 112016108584603-pat00083
Type circuit is connected to the asymmetrical geilerial power divider through two connection terminals (more specifically, the other side of the transmission line Zo3 and the other side of the transmission line Zo4 in Fig. 1), two connection terminals 1, and two termination resistors Rp1 and Rp2.

The termination resistor Rp1 has one end connected to the first connection terminal and the other end connected to the ground, and the termination resistor Rp2 has one end connected to the second connection terminal and the other end connected to the ground. Further, the transmission line having the length of? / 4 is implemented as a partial transmission line having impedance of Zp1 and a partial transmission line having impedance of Zp2, and the impedance value can be defined as the sum of Zp1 and Zp2.

remind

Figure 112015051598110-pat00029
An asymmetric zircell power divider with a type circuit can be converted to an asymmetric zircell power divider with an equivalent T-type circuit with an electrical characteristic (input and output values are the same) through the ABCD matrix.

Table 1 below shows examples of parameters of the ABCD matrix in the circuit having the two terminals.

[Table 1]

Figure 112015051598110-pat00030

The two termination resistors Rp1, Rp2 and one transmission line are connected

Figure 112015051598110-pat00031
ABCD matrix parameters of the type circuit can be derived as shown in Equation (1) below.

[Equation 1]

Figure 112015051598110-pat00032

As shown in FIG. 2B, the T-shaped circuit of the asymmetric geiler power distributor including the T-type circuit is connected to the asymmetric geel power distributor through two connection terminals as described above (more specifically, (Connected to the other side of the transmission line Zo3 and the other side of the transmission line Zo4), first and second transmission lines connected in parallel between the two connection terminals, and a shunt resistor R3. The ABCD matrix parameters of the asymmetric zircell power divider having the T-shaped circuit shown in Fig. 2B can be derived as shown in Equation 2 below.

&Quot; (2) "

Figure 112015051598110-pat00033

remind

Figure 112015051598110-pat00034
The ratio of the output power of the asymmetric zeolite power divider is P2 / P3 when the two output terminals are respectively P2 and P3,
Figure 112015051598110-pat00035
. Therefore, the ratio of the impedance between the two output terminals is
Figure 112015051598110-pat00036
. remind
Figure 112015051598110-pat00037
When the characteristic impedance of the transmission line between output ends of the asymmetric zeolite power divider is Z0 and p and q are ideal numbers,
Figure 112015051598110-pat00038
And
Figure 112015051598110-pat00039
. In order to correspond the parameters of Equations (1) and (2) to each other, the following Equation (3) must be satisfied.

&Quot; (3) "

Figure 112015051598110-pat00040

After the resistors are selected as Rp1 = Z0 / k and R3 = Z0,

Figure 112015051598110-pat00041
And the power distribution ratio
Figure 112015051598110-pat00042
The impedance value of the transmission line of the T-type circuit
Figure 112015051598110-pat00043
As shown in Fig. If
Figure 112015051598110-pat00044
=
Figure 112015051598110-pat00045
If the above condition is satisfied,
Figure 112015051598110-pat00046
(Irrespective of the impedance value).

FIG. 3 is a graph showing the relationship between the impedance value at one end of a transmission line in an asymmetric zirconia power divider having a T-shaped circuit according to the preferred embodiment of the present invention

Figure 112015051598110-pat00047
And
Figure 112015051598110-pat00048
=
Figure 112015051598110-pat00049
The impedance value of the other end which changes in accordance with the change of the power distribution ratio obtained through < RTI ID = 0.0 >
Figure 112015051598110-pat00050
Fig.

As the value of K 2 increases, the impedance value at the other end of the transmission line

Figure 112015051598110-pat00051
Is rapidly changing. Impedance value at the end of transmission line
Figure 112015051598110-pat00052
With changes in
Figure 112015051598110-pat00053
The degree of change is relatively small.

In order to demonstrate the performance of an asymmetric zircell power divider with the proposed T-shaped circuit of the present invention, a 2: 1 asymmetric zircal power divider with a center frequency of 2 GHz, T-type circuit can be designed and simulated. Hereinafter, characteristics of an asymmetric zircell power distributor having a T-shaped circuit actually manufactured will be described with reference to FIGS. 4 to 6. FIG.

4 is a photograph showing an asymmetric zircell power divider having a T-type circuit actually manufactured according to an embodiment of the present invention.

As shown in Fig. 4, a 2: 1 asymmetric zircell power divider with a 50 ohm shunt resistor and dummy transmission line with the nature of an asymmetric zircell power divider with the T circuit shown in Fig. Can be produced.

The asymmetric zircell power divider with the T-shaped circuit was fabricated on an epoxy PCB circuit board with a dielectric constant epsilon = 4.4 and a thickness h = 0.787 mm, and the simulation could be performed using microwave office software developed by National Instruments will be.

To obtain the correct ABCD parameters, the simulation conditions may be chosen as Z0 = 50? P = 1.742 and q = 0.245.

5 is a graph showing measured S parameters of an asymmetric zircell power divider having a T-shaped circuit according to an embodiment of the present invention.

The S parameter (Scattering Parameter) is the circuit output value used in RF, usually the ratio of the input voltage to the output voltage over the frequency distribution. That is, it is a numerical value indicating how much power input to the input terminal is output to the output terminal. And can be utilized when analyzing the transmission performance of a transmission line. This allows you to check the insertion loss, transmission capacity, and line coupling of each line.

FIG. 5 shows simulation results and experimentally measured results of the asymmetric zircell power divider based on the actual T-type circuit shown in FIG. The asymmetric zircell power divider based on the T-shaped circuit described above exhibits an insertion loss of 2.2 dB and 5.3 dB, an isolation greater than 18 dB, an input return loss of 20 dB and an output return loss of greater than 17 dB at a center frequency of 2 GHz. These characteristics are similar to those of conventional

Figure 112015051598110-pat00054
Type asymmetric zeolite power distributor. However, since the asymmetric ge- cell power divider based on the proposed T-type circuit uses one shunt resistor,
Figure 112015051598110-pat00055
Spatial efficiency is higher than that of the asymmetric zeolite power divider.

FIG. 6 is a graph illustrating a result of measurement of harmonic characteristics of an asymmetric zircell power divider having a T-shaped circuit according to an embodiment of the present invention.

That is, FIG. 6 also shows the characteristics of the harmonics obtained by simulating the asymmetric ge cell power divider based on the actual T-type circuit shown in FIG. 4 and the characteristics of the harmonics actually obtained.

As shown in FIG. 6, the return loss of the second, third and fourth harmonics is increased because two? / 4 transmission lines having different impedance values are used.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. will be. Therefore, it should be understood that the above-described embodiments are illustrative and non-restrictive in every respect. Therefore, the true scope of the present invention should be determined by the following claims.

Claims (5)

In an asymmetric zeolite power divider having a T-type circuit,
The T-
And a connection terminal connected between two connection terminals of the asymmetric zipper power distributor,
Figure 112016108584603-pat00084
A partial transmission line having an impedance of < RTI ID = 0.0 >
Figure 112016108584603-pat00085
A first transmission line implemented as a partial transmission line having an impedance of;
And a connection terminal connected between two connection terminals of the asymmetric zipper power distributor,
Figure 112016108584603-pat00086
A partial transmission line having an impedance of < RTI ID = 0.0 >
Figure 112016108584603-pat00087
A second transmission line implemented as a partial transmission line having an impedance of; And
remind
Figure 112016108584603-pat00088
A partial transmission line having an impedance of
Figure 112016108584603-pat00089
A shunt resistor connected between the ground and the contact of the partial transmission line having the impedance of the shunt resistor,
Figure 112016108584603-pat00090
/ RTI > and the ABCD matrix is expressed as < RTI ID = 0.0 > ABCD < / RTI > The method according to claim 1,
Wherein an electrical length of each of the first and second transmission lines is? / 2, and? Is a wavelength of a power signal input to the asymmetric zell-pole power divider. 3. The method of claim 2,
The value of the shunt resistance is a characteristic impedance value Z0,
The impedance value of the first transmission line is
Figure 112016108584603-pat00091
Wow
Figure 112016108584603-pat00092
Lt; / RTI >
The impedance value of the second transmission line is
Figure 112016108584603-pat00093
Wow
Figure 112016108584603-pat00094
Lt; / RTI >
The power split ratio
Figure 112016108584603-pat00095
/
Figure 112016108584603-pat00096
ego,
remind
Figure 112016108584603-pat00097
Wow
Figure 112016108584603-pat00098
Is a multiple of the characteristic impedance Z0
Figure 112016108584603-pat00099
= pZO,
Figure 112016108584603-pat00100
= qZ0,
Wherein p and q are an ideal number. The method of claim 3,
Figure 112015051598110-pat00066

, ≪ / RTI >
remind
Figure 112015051598110-pat00067
Is the power distribution ratio,
R3 is a shunt resistance value of the T-type circuit,
The Rp1 is
Figure 112015051598110-pat00068
Type circuit is a value of one of the termination resistors,
remind
Figure 112015051598110-pat00069
Type circuit is equivalent to the T-type circuit. 5. The method of claim 4,
remind
Figure 112016108584603-pat00070
Type circuit,
A transmission line having a length of? / 4 and two first and second terminal resistors,
One transmission line having the length of? / 4 is connected between two connection terminals to the asymmetric zeolite power distributor,
Wherein the first termination resistor has one end connected to the first output terminal and the other end connected to the ground,
Wherein the second termination resistor has one end connected to the second output end and the other end connected to the ground, respectively.
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Cited By (2)

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KR102046408B1 (en) * 2018-07-23 2019-11-19 광운대학교 산학협력단 A power divider with enhanced selectivity performance
KR102319440B1 (en) 2020-09-07 2021-11-01 경희대학교 산학협력단 A lumped-element Wilkinson power divider using asymmetric negative capacitance

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CN108682926B (en) * 2018-06-14 2020-01-03 南京师范大学 High-selectivity dual-passband power division filter
KR101967426B1 (en) * 2018-09-17 2019-05-10 (주)엑소더스커뮤니케이션스 Gysel power combiner for high power
CN110011019A (en) * 2019-03-27 2019-07-12 南京信息职业技术学院 Radar scaling network power divider adopting membrane resistor as isolation resistor
KR102237854B1 (en) * 2019-12-30 2021-04-07 광운대학교 산학협력단 Compact Single-Band Power Divider With Zero-Degree Composite Right-/Left-Hand Transmission Lines
KR102244144B1 (en) * 2020-01-21 2021-04-22 광운대학교 산학협력단 Compact Multi-Band Power Divider With Zero-Degree Composite Right-/Left-Hand Transmission Lines
CN114256583B (en) * 2021-12-10 2023-03-14 中国电子科技集团公司第三十八研究所 DSPSL-based four-way reversed-phase Gysel power divider
CN115775963B (en) * 2022-11-01 2024-03-19 西安电子科技大学 Broadband multi-section Gysel type power divider
KR20240075380A (en) 2022-11-22 2024-05-29 주식회사 디에프엠 Stripline gysel power divider

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KR102046408B1 (en) * 2018-07-23 2019-11-19 광운대학교 산학협력단 A power divider with enhanced selectivity performance
KR102319440B1 (en) 2020-09-07 2021-11-01 경희대학교 산학협력단 A lumped-element Wilkinson power divider using asymmetric negative capacitance

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