JP2005244361A - Broadband phase shifter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a phase shifter with a broadband characteristic without the need for increasing the circuit scale. <P>SOLUTION: The broadband phase shifter is characterized in providing an adjustable phase and amplitude characteristics by utilizing a combination of a polyphase filter type four-phase power distributor for using a CR circuit to provide outputs of four signals whose phases differ from each other by 90 degrees each, and an x-degree phase shifter for providing outputs of four signals whose phase difference is an optional phase angle of 90 degrees or below. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a configuration of a frequency phase shifter used in communication equipment and measuring instruments that require wideband characteristics.

Various configurations of quadrature modulators / demodulators using the direct conversion method have been reported for some time. FIG. 19 is a diagram showing a configuration of a quadrature modulator / demodulator using a conventional direct conversion method.
In FIG. 19, 131 is an RF signal input / output terminal for inputting / outputting a high frequency signal of frequency f _RF , 132 is a local oscillator for generating a local oscillation wave of frequency f _LO , and 133 and 134 have a phase difference of 90 degrees from each other. The baseband signal input / output terminal to which the baseband signal is input and output, 135 is an RF signal output from the even harmonic mixers 137 and 138, or the RF signal input to the RF signal input / output terminal 131 is distributed in phase. In-phase power distributing and synthesizing circuit that synthesizes the local oscillation wave of frequency f _LO generated by the local oscillator 132 with a 45-degree phase difference, and 137 and 138 are even harmonic mixers. there are a local oscillation wave outputted by the frequency f _LO of the frequency f _RF of the RF signal and 45-degree power divider 136 which outputs the in-phase power divider combiner 135 The mixed baseband signal to be output to the baseband signal input and output terminals 133 and 134, or the output frequencies _{f LO} of the baseband signal and 45-degree power divider 136 and input to the baseband signal input and output terminals 133 and 134 It has a function of mixing each local oscillation wave and outputting it as an RF signal from the RF signal input / output terminal 131. By using the even harmonic mixers 137 and 138, it is possible to reduce a DC offset which is a problem in the direct conversion method, and to improve characteristics. However, since the even harmonic mixer mixes the second harmonic of the local oscillation wave and the high frequency signal wave, the phase difference of the power distributor 136 needs to be 45 degrees in order to perform quadrature modulation / demodulation.

Conventionally, as the 45-degree power distributor 136 in FIG. 19, a power distributor in which a resistance element and a capacitance element shown in FIG. 13 are combined is used. In FIG. 13, 91 is an input terminal, 92 and 93 are output terminals, 94 is a resistance element having a resistance value R ₁₁ , 95 is a resistance element having a resistance value R ₂₁ , 96 is a capacitance element having a capacitance value C ₁₁ , and 97 is a capacitance value. C ₂₁ capacitive element. At this time, if the amplitude voltage of the input signal is V _in and the amplitude voltages of the output signals at the output terminals 92 and 93 are V _out11 and V _out21 , respectively, the output of the power distributor 136 in FIG.

となり、伝達関数は次のようになる。

The transfer function is as follows.

（数１）、（数２）式より振幅特性および位相特性はそれぞれ

From the equations (1) and (2), the amplitude characteristics and phase characteristics are respectively

となる。（数５）、（数６）、（数７）、（数８）式より、ω＝ω_１で等振幅、位相差がｘ度となる条件は

It becomes. From (Equation 5), (Equation 6), (Equation 7), and (Equation 8), the condition that the equal amplitude and the phase difference are x degrees when ω = ω ₁ is

となる。従って、（数９）、（数１０）式を満足するようなＲ_１１、Ｒ_２１、Ｃ_ｌ１、Ｃ_２１、を設定すれば、ｘ度電力分配器を実現することが出来る。図１４、図１５はｘ＝４５とした場合の従来の電力分配器の位相差と振幅誤差の数値シミュレーション結果である。それぞれの素子定数はＲ_１１＝１０Ω、Ｒ_２１＝２５４．３Ω、Ｃ_ｌ１＝４．７２ｐＦ、Ｃ_２１＝５．９２ｐＦである。同図より、位相差が４５±２．５度、振幅誤差が０±１ｄＢとなる周波数範囲は１．０ＧＨｚ〜１．２ＧＨｚと狭帯域な特性となっている。

It becomes. Therefore, if R ₁₁ , R ₂₁ , C ₁₁ , and C ₂₁ are set so as to satisfy the expressions (9) and (10), an x-degree power distributor can be realized. 14 and 15 show the numerical simulation results of the phase difference and amplitude error of the conventional power distributor when x = 45. The respective element constants are R ₁₁ = 10Ω, R ₂₁ = 254.3Ω, C ₁₁ = 4.72 pF, and C ₂₁ = 5.92 pF. From the figure, the frequency range where the phase difference is 45 ± 2.5 degrees and the amplitude error is 0 ± 1 dB is a narrow band characteristic of 1.0 GHz to 1.2 GHz.

As a configuration for improving the narrow-band frequency characteristics, a power distributor shown in FIG. In FIG. 16, 101 is an input terminal, 102 and 103 are output terminals, 104 is a resistance element having a resistance value R ₁₂ , 105 is a resistance element having a resistance value R ₂₂ , 106 is a resistance element having a resistance value R ₃₂ , and 107 is a resistance value. A resistor element R ₄₂ , 108 a capacitor element having a capacitance value C ₁₂ , 109 a capacitor element having a capacitance value C ₂₂ , 110 a capacitor element having a capacitance value C ₃₂ , and 111 a capacitor element having a capacitance value C ₄₂ . 17 and 18 show the numerical simulation results of the phase difference and amplitude error of the power distributor of FIG. 16 when x = 45. The respective element constants are R ₁₂ = 53.1Ω, R ₂₂ = 10.0Ω, R ₃₂ = 18.0Ω, R ₄₂ = 50.8Ω, C ₁₂ = 27.4 pF, C ₂₂ = 1.21 pF, C ₃₂ = 2.29 pF, C ₄₂ = 2.02 pF. From the figure, the frequency range in which the phase difference is 45 ± 2.5 degrees and the amplitude error is 0 ± 1 dB is 1.3 GHz to 2.1 GHz, and a wider band is achieved when compared with the power distributor of FIG. However, a sufficient bandwidth is still not obtained in a narrow band.

JP 2002-261565 A Samuel Shen, Robert Brodersen, “Low Power CMOS Wireless Communication Wideband CDMA System Design”, USA, Kluwer Academic Publishing, 1997, p. 97 (Samuel Sheng, Robert Brodersen, “Low-Power CMOS Wireless Communications A Wideband CDMA System Design”, USA Kluwer Academic Publishers, 1997 p.97)

  The example of the broadband phaser shown in FIG. 16 has a problem that only the phase characteristic has a broadband characteristic and the amplitude characteristic has no broadband characteristic as shown in FIGS. Further, when the amplitude characteristic of the phase shifter is improved, an amplitude error compensation circuit for equalizing the output amplitude is required, and there is a problem that the circuit scale is increased.

  In order to solve the above problems, the phase shifter according to claim 1 of the present invention includes a resistance element and a capacitance element, and includes a 0 degree phase signal, a 90 degree phase signal, a 180 degree phase signal, and a 270 degree input power. A polyphase filter type four-phase power distributor that outputs a phase signal and the four signals output from the polyphase filter type four-phase power distributor are input, and an arbitrary value x satisfying 0 <x ≦ 90 is input. The x-degree phase shifter is configured to output four signals having phase differences of 0 degrees, x degrees, 180 degrees, and (180 + x) degrees. As the x-degree phase shifter, a first resistance element is connected to a first input terminal. One end and one end of the first capacitor element are connected, one end of the second resistor element and one end of the second capacitor element are connected to the second input terminal, and the third resistor element is connected to the third input terminal. One end and one end of the third capacitive element are connected, and the fourth input One end of a fourth resistor element and one end of a fourth capacitor element are connected to the child, and the other end of the fourth capacitor element and the first output terminal are connected to the other end of the first resistor element; The other end of the first capacitive element and the second output terminal are connected to the other end of the second resistive element, and the other end of the second capacitive element and the second output terminal are connected to the other end of the third resistive element. 3, an RC phase shifter in which the other end of the third capacitive element and the fourth output terminal are connected to the other end of the fourth resistance element, and the first phase of the x-degree phase shifter is used. Is connected to a terminal for outputting a 0 degree phase signal of the polyphase filter type four-phase power divider, and a second input terminal of the x degree phase shifter is connected to the input terminal of the polyphase filter type four phase power divider. A terminal for outputting a 90 degree phase signal is connected, and the polyphase is connected to a third input terminal of the x degree phase shifter. A terminal for outputting a 180-degree phase signal of the filter-type four-phase power distributor is connected, and a 270-degree phase signal of the polyphase filter-type four-phase power distributor is output to a fourth input terminal of the x-degree phase shifter. The terminal is connected.

  According to a second aspect of the present invention, the phase shifter includes a resistive element and a capacitive element, and outputs a 0 degree phase signal, a 90 degree phase signal, a 180 degree phase signal, and a 270 degree phase signal of input power. Type four-phase power distributor and the four signals output from the polyphase filter type four-phase power distributor are input, and 0 degree, x degree, 180 degrees with respect to an arbitrary value x of 0 <x ≦ 90 , And an x degree phase shifter that outputs four signals having a phase difference of (180 + x) degrees. As the x degree phase shifter, one end of a first resistance element and a first capacitive element are connected to a first input terminal. One end of the second resistor element and one end of the second capacitor element are connected to the second input terminal, and one end of the third resistor element and the third capacitor element are connected to the third input terminal. One end of the fourth resistor element is connected to the fourth input terminal One end of the fourth capacitor element, one end of the fifth capacitor element connected to the other end of the first resistor element, and one end of the sixth capacitor element connected to the other end of the second resistor element. One end is connected, one end of a seventh capacitive element is connected to the other end of the third resistive element, one end of an eighth capacitive element is connected to the other end of the fourth resistive element, and the fifth The other end of the fourth capacitor and the first output terminal are connected to the other end of the capacitor, and the other end of the first capacitor and the second output are connected to the other end of the sixth capacitor. A terminal is connected, the other end of the second capacitor and the third output terminal are connected to the other end of the seventh capacitor, and the third capacitor is connected to the other end of the eighth capacitor. RC phase shifter having a connection between the other end and the fourth output terminal, and the polyphase filter type at the first input terminal of the x degree phase shifter A terminal for outputting the 0 degree phase signal of the phase power distributor is connected, and a terminal for outputting the 90 degree phase signal of the polyphase filter type four phase power distributor is connected to the second input terminal of the x degree phase distributor. A terminal that outputs a 180-degree phase signal of the polyphase filter type four-phase power distributor is connected to a third input terminal of the x-degree phase shifter, and the fourth input terminal of the x-degree phase shifter is connected to the fourth input terminal of the x-degree phase shifter. A terminal for outputting a 270 degree phase signal of the polyphase filter type four-phase power distributor is connected.

  According to a third aspect of the present invention, the phase shifter includes a resistive element and a capacitive element, and outputs a 0 degree phase signal, a 90 degree phase signal, a 180 degree phase signal, and a 270 degree phase signal of input power. The four signals output from the filter type four-phase power distributor and the polyphase filter type four-phase power distributor are inputted, and 0 degree, x degree, 180 degrees with respect to an arbitrary value x of 0 <x ≦ 90. , And an x degree phase shifter that outputs four signals having a phase difference of (180 + x) degrees. As the x degree phase shifter, one end of a first resistance element and a first capacitive element are connected to a first input terminal. One end of the second resistor element and one end of the second capacitor element are connected to the second input terminal, and one end of the third resistor element and the third capacitor element are connected to the third input terminal. One end of the fourth resistance element is connected to the fourth input terminal. And one end of the fourth resistor element, one end of the fifth resistor element is connected to the other end of the first capacitor element, and one end of the sixth resistor element is connected to the other end of the second capacitor element. One end of a seventh resistor element is connected to the other end of the third capacitor element, one end of an eighth resistor element is connected to the other end of the fourth capacitor element, and the first capacitor element is connected to the first capacitor element. The other end of the eighth resistance element and the first output terminal are connected to the other end of the resistance element, and the other end of the fifth resistance element and the second output terminal are connected to the other end of the second resistance element. And the other end of the sixth resistor element and the third output terminal are connected to the other end of the third resistor element, and the other end of the fourth resistor element is connected to the other end of the seventh resistor element. An RC phase shifter connected to the other end and a fourth output terminal is used, and the first input terminal of the x-degree phase shifter is the polyphase filter type four-phase power component. Connecting a terminal for outputting a 0 degree phase signal of the detector, connecting a terminal for outputting a 90 degree phase signal of the polyphase filter type four-phase power distributor to a second input terminal of the x degree phase shifter, and A terminal for outputting a 180-degree phase signal of the polyphase filter type four-phase power distributor is connected to a third input terminal of the x-degree phase shifter, and the polyphase filter is connected to a fourth input terminal of the x-degree phase shifter. The terminal which outputs a 270 degree phase signal of the type | mold 4 phase power divider | distributor is set as the structure connected.

  According to a fourth aspect of the present invention, a phase shifter includes a resistive element and a capacitive element, and outputs a 0 degree phase signal, a 90 degree phase signal, a 180 degree phase signal, and a 270 degree phase signal of input power. The filter type four-phase power distributor and the four signals output from the polyphase filter type four-phase power distributor are input, and 0 degree, x degree, 180 for an arbitrary value x of 0 <x ≦ 90. And an x-degree phase shifter that outputs four signals having a phase difference of (180 + x) degrees. As the x-degree phase shifter, one end of the first resistance element and the first capacitance are connected to the first input terminal. One end of the element is connected, one end of the second resistor element and one end of the second capacitor element are connected to the second input terminal, and one end of the third resistor element and the third capacitor are connected to the third input terminal. One end of the element is connected, and one end of the fourth resistance element is connected to the fourth input terminal. And one end of the fourth resistor element, one end of the fifth capacitor element is connected to the other end of the first resistor element, and one end of the sixth capacitor element is connected to the other end of the second resistor element. , One end of a seventh capacitor element is connected to the other end of the third resistor element, one end of an eighth capacitor element is connected to the other end of the fourth resistor element, and the first resistor One end of a fifth resistor element is connected to the other end of the capacitor element, one end of a sixth resistor element is connected to the other end of the second capacitor element, and a seventh element is connected to the other end of the third capacitor element. One end of the fourth capacitor element, one end of the eighth resistor element connected to the other end of the fourth capacitor element, the other end of the eighth resistor element and the other end of the fifth capacitor element, and The first output terminal is connected, the other end of the fifth resistor element and the second output terminal are connected to the other end of the sixth capacitor element, and the other of the seventh capacitor element. The other end of the sixth resistive element and the third output terminal are connected to the other end, and the other end of the seventh resistive element and the fourth output terminal are connected to the other end of the eighth capacitive element. Using an RC phase shifter, a terminal for outputting a 0 degree phase signal of the four-phase power divider is connected to a first input terminal of the x degree phase shifter, and the second input terminal of the x degree phase shifter is connected to the second input terminal of the x degree phase shifter. Connecting a terminal for outputting a 90-degree phase signal of the four-phase power distributor, connecting a terminal for outputting a 180-degree phase signal of the four-phase power distributor to a third input terminal of the x-degree phase shifter; The fourth input terminal of the x-degree phase shifter is connected to the terminal that outputs the 270-degree phase signal of the four-phase power distributor.

  Furthermore, the phase shifter according to claim 5 is the broadband phase shifter according to any one of claims 1 to 4, wherein the basic block is connected to the first input terminal as the polyphase filter type four-phase power distributor. One end of the first resistive element and one end of the first capacitive element are connected, one end of the second resistive element and one end of the second capacitive element are connected to the second input terminal, and the third input terminal One end of the third resistive element and one end of the third capacitive element are connected, one end of the fourth resistive element and one end of the fourth capacitive element are connected to the fourth input terminal, and the first resistive element The other end of the fourth capacitor element and the first output terminal are connected to the other end of the second capacitor element, and the other end of the first capacitor element and the second output terminal are connected to the other end of the second resistor element. And the other end of the second capacitive element and the third end of the third resistive element A power terminal is connected, and the other end of the third capacitive element and the fourth output terminal are connected to the other end of the fourth resistance element, and the basic block has a multi-stage configuration. A first input terminal of the rear stage is connected to the output terminal of 1, a second input terminal of the rear stage is connected to the second output terminal, a third input terminal of the rear stage is connected to the third output terminal, A fourth input terminal in the subsequent stage is connected to the fourth output terminal, the second and fourth input terminals in the basic block in the first stage are grounded, and 180 degrees are connected to the first and third input terminals. The polyphase filter type four-phase power divider is used, which inputs four phase difference signals and outputs four signals having phase differences of 0 degrees, 90 degrees, 180 degrees, and 270 degrees.

  The phase shifter according to claim 6 of the present invention is the broadband phase shifter according to any one of claims 1 to 4, wherein the basic block is the first input terminal as the polyphase filter type four-phase power distributor. One end of the first resistive element and one end of the first capacitive element are connected to the second input terminal, one end of the second resistive element and one end of the second capacitive element are connected to the second input terminal, and a third input terminal One end of the third resistor element and one end of the third capacitor element are connected to the first input terminal, one end of the fourth resistor element and one end of the fourth capacitor element are connected to the fourth input terminal, and the first resistor The other end of the fourth capacitor element and the first output terminal are connected to the other end of the element, and the other end of the first capacitor element and the second output terminal are connected to the other end of the second resistor element. And the other end of the second capacitor and the third resistor are connected to the other end of the third resistor. A power terminal is connected, and the other end of the third capacitor and the fourth output terminal are connected to the other end of the fourth resistance element, and the basic block has a multi-stage configuration. A first input terminal of the rear stage is connected to the output terminal of 1, a second input terminal of the rear stage is connected to the second output terminal, a third input terminal of the rear stage is connected to the third output terminal, The fourth input terminal of the subsequent stage is connected to the fourth output terminal, and the first and second input terminals of the first-stage basic block are 0 degrees, and the third and fourth input terminals are 180 degrees. Are used, and a polyphase filter type four-phase power distributor that outputs four signals having phase differences of 0 degrees, 90 degrees, 180 degrees, and 270 degrees is used.

  The configuration described above is different from the conventional technique in that not only phase characteristics but also amplitude characteristics can be realized in a wide band.

  According to the present invention, it is possible to configure a phase shifter capable of obtaining a desired phase / amplitude characteristic over a wide frequency range, and as a result, a quadrature modulator / demodulator can be widened. Therefore, the present invention is effective for application of a broadband quadrature modulator / demodulator to a monolithic microwave integrated circuit.

[First Embodiment]
FIG. 1 is a circuit configuration diagram showing the configuration of a broadband phase shifter according to a first embodiment of the present invention. In the figure, 1 is an input terminal, 2, 3, 4, 5 are output terminals, and 6 is a resistor. It consists element and a capacitive element polyphase filter type 4 phase power divider, 7, 8, 9, 10 is the resistance value of each of _{R 1, R 2, R 1} , R 2 of the resistor element, 11, 12, 13 , 14 are capacitive elements having capacitance values C ₁ , C ₂ , C ₁ , C ₂ , respectively. The output terminal A of the four-phase power distributor 6 is connected to the first input terminal A ′ of the succeeding phase shifter configured by the RC circuit, and one end of the resistance element 7 and one end of the capacitive element 11 are connected to A ′. Then, the output terminal B of the four-phase power distributor 6 and the input terminal B ′ of the subsequent phaser are connected, and one end of the resistance element 8 and one end of the capacitive element 12 are connected to B ′, and the four-phase power distributor 6 is connected to the third input terminal C ′ of the subsequent phase shifter, one end of the resistance element 9 and one end of the capacitive element 13 are connected to C ′, and the output terminal of the four-phase power distributor 6 is connected. D is connected to the input terminal D ′ of the subsequent phase shifter, one end of the resistive element 10 and one end of the capacitive element 14 are connected to D ′, and the other end of the capacitive element 14 and the first end are connected to the other end of the resistive element 7. Are connected to the other end of the resistor element 8 and the second output terminal 3 is connected to the other end of the resistor element 8. Connect the other end and a third output terminal 4 of the amounts element 12 connects the other end of the output terminal 5 of the fourth capacitive element 13 to the other end of the resistor element 10.
As a polyphase filter type four-phase power distributor composed of a resistance element and a capacitor element, a four-phase power distributor using a polyphase filter shown in FIG. Yes. In this case, the output terminal A outputs a 0 degree phase signal, the output terminal B outputs a 90 degree phase signal, the output terminal C outputs a 180 degree phase signal, and the output terminal D outputs a 270 degree phase signal. A signal is output.

Here, the operation of the wideband x-degree phase shifter is x = 45, and the second and fourth input terminal sides as shown in FIG. 26 as a polyphase filter type four-phase power distributor composed of a resistance element and a capacitance element. A case where a single-phase polyphase filter and an RC phase shifter are used as an example will be described. In the figure, 201 and 202 are first and third input terminals, 203, 204, 205 and 206 are first, second, third and fourth output terminals, 207, 208, 209, 210, 211, 212, 213, and 214 have resistance values of R ₃₃ , R ₃₃ , R ₃₃ , R ₃₃ , R ₁₃ , R ₂₃ , R _l3 , R ₂₃ , respectively, 215, 216, 217, 218, 219, 220, 221 , 222 are capacitance elements having capacitance values C ₃₃ , C ₃₃ , C ₃₃ , C ₃₃ , C ₁₃ , C ₂₃ , C ₁₃ , C ₂₃ , and 223 is a polyphase filter.

First, a one-stage polyphase filter that grounds the second and fourth input terminals shown in FIG. 29 and inputs a 180-degree phase difference signal to the first input terminal 231 and the third input terminal 232 is provided. A polyphase filter type four-phase power distributor will be described.
29, 231 and 232 are input terminals, 233, 234, 235, and 236 are first to fourth output terminals in order, and 237, 238, 239, and 240 are R ₃₄ resistance elements, 241, 242, 243, 244 is a capacitive element for capacitance value _{C 34.} Here the input voltage of the polyphase filter F and V _in, the output voltage in the first to fourth output terminals and each _{V out14, V out24, V out34} , V out44, and the output impedance and Z _0, 1 The output voltage of the phase shifter according to the present invention shown in FIG.

となり、出力信号の振幅と位相はそれぞれ

The output signal amplitude and phase are

となる。よって、振幅誤差、位相差は

It becomes. Therefore, the amplitude error and phase difference are

となり、図２９に示すポリフェーズフィルタは全周波数帯域で０、９０、１８０、２７０度位相差、ω＝１／Ｒ_３４Ｃ_３４となる周波数で等振幅となる特性を有するが、ω＝１／Ｒ_３４Ｃ_３４となる周波数近傍から外れると、（数１４）式から振幅誤差が増大することがわかる。即ち、ポリフェーズフィルタの後段にＲＣフィルタを接続した場合、ω＝１／Ｒ_３４Ｃ_３４となる周波数から外れた周波数帯域では異なるレベルの信号が入力されることとなる。

The polyphase filter shown in FIG. 29 has characteristics of 0, 90, 180, 270 degrees phase difference in all frequency bands and equal amplitude at a frequency of ω = 1 / R ₃₄ C ₃₄ , but ω = 1 / It can be seen from the equation (14) that the amplitude error increases when the frequency is out of the vicinity of R ₃₄ C ₃₄ . That is, when an RC filter is connected after the polyphase filter, signals of different levels are input in a frequency band that is out of the frequency where ω = 1 / R ₃₄ C ₃₄ .

  Next, a case where an RC phase shifter is connected to the polyphase filter will be described.

In the case of angular frequency ω ₀ = 1 / R ₃₅ C ₃₅ where the amplitude of the output signal of the polyphase filter 223 in FIG. 26 is equal, that is, the input signal is always of equal amplitude, 0 degree, 90 degrees, 180 degrees, 270 degrees. In the case of the phase difference, the potentials V ₁ , V ₂ , V ₃ , V ₄ at the point connecting the output terminal of the polyphase filter and the input terminal of the RC phase shifter at the angular frequency ω ₀ are

となる。ここでＶ_０はポリフェーズフィルタの出力端子１における電圧である。このとき、図１における位相器の出力電圧は

It becomes. Here, V ₀ is a voltage at the output terminal 1 of the polyphase filter. At this time, the output voltage of the phase shifter in FIG.

となる。ここで、Ｖ_ｏｕｔ１、Ｖ_ｏｕｔ２、Ｖ_ｏｕｔ３、Ｖ_ｏｕｔ４はそれぞれ図１における出力端子２、３、４、５での出力電圧、Ｚ_０は出力のインピーダンスである。このとき、

It becomes. Here, V _out1 , V _out2 , V _out3 , and V _out4 are output voltages at the output terminals 2, 3, 4, and 5, respectively, and Z ₀ is an output impedance. At this time,

を満足するＲ_１、Ｒ_２、Ｃ_１、Ｃ_２を設定することにより、等振幅、位相差がｘ度となる。一方、ω＝ω_０となる周波数近傍から外れる周波数帯域では、ポリフェーズフィルタヘの入力電圧をＶ_ｉｎとすると、図１に示す位相器の出力電圧は

By setting R ₁ , R ₂ , C ₁ , and C ₂ that satisfy the above, the equal amplitude and the phase difference become x degrees. On the other hand, in the frequency band out of the frequency near which the omega = omega _0, when the input voltage of the polyphase filter F and V _in, the output voltage of the phase shifter shown in Figure 1

となる。このとき、出力信号の位相差は

It becomes. At this time, the phase difference of the output signal is

となる。このとき、左辺の微分値（ｄ／ｄω）ｄｅｌｔａ＿ｐｈａｓｅ（ω）＝０となるωを１つ以上持ち、（数１９）式の１次微分をした場合より増加する。すなわち、（数１９）式より多くの極値を持つことなる。したがって、（ｄ／ｄω）ｄｅｌｔａ＿ｐｈａｓｅ（ω）＝０となるωを２つ以上もつようＲ_１、Ｒ_２、Ｃ_１、Ｃ_２を設定することにより、位相差の極値の数を増加させることが可能となり、その結果提案回路は広帯域化を図ることが出来る。図２、図３は図１の電力分配器の位相差と振幅誤差の数値シミュレーション結果である。それぞれの素子定数はＲ_１＝１０．１Ω、Ｒ_２＝３２．３Ω、Ｃ_１＝１２．２ｐＦ、Ｃ_２＝４．６３ｐＦである。

It becomes. At this time, the differential value (d / dω) delta_phase (ω) = 0 on the left side has one or more ω, which is larger than the case where the first-order differentiation of Equation (19) is performed. That is, it has more extreme values than the equation (19). Therefore, by setting R ₁ , R ₂ , C ₁ , and C ₂ so as to have two or more ω such that (d / dω) delta_phase (ω) = 0, the number of extreme values of the phase difference is increased. As a result, the proposed circuit can achieve a wider bandwidth. 2 and 3 show the numerical simulation results of the phase difference and amplitude error of the power distributor of FIG. The respective element constants are R ₁ = 10.1Ω, R ₂ = 32.3Ω, C ₁ = 12.2 pF, and C ₂ = 4.63 pF.

  First, as a polyphase filter type four-phase power divider, the second and fourth input terminals shown in FIG. 20 are grounded, and a signal having a phase difference of 180 degrees is input to each of the first and third input terminals. The case where it is used will be described.

In FIG. 20, the input terminals 141 and 142, 143, 144, 145, and 146 is an output terminal, the resistor elements of the resistor values 147,148,149,150 is _{R 16,} 151, 152, 153, 154 has a resistance value R ₂₆ resistance element, 155, 156, 157, 158 are R ₃₆ resistance elements, 159, 160, 161, 162 are C ₁₆ capacitance elements, and 163, 164, 165, 166 are capacitance values Is a C ₂₆ capacitive element, and 167, 168, 169 and 170 are C ₃₆ capacitive elements.

FIG. 21 is a simulation result of the phase characteristics of the polyphase filter shown in FIG. 20, and it can be seen that a 90-degree phase difference is realized over a wide band. On the other hand, the amplitude characteristic has frequency dependency as shown in FIG. 22, and the amplitude error increases at 2 GHz or more. However, when the polyphase filter of FIG. 20 is used in the configuration according to the present invention of FIG. 1 and the corresponding terminals of the polyphase filter output terminal and the input terminal of the phase shifter are connected to each other, the polyphase filter of 2 GHz or higher Since the increase of the amplitude error and the increase of the amplitude error and the phase error of the RC phase shifter are compensated for each other, the phase shifter having the configuration of the present invention shown in FIG. 1 can realize a wide band characteristic. . The element constants of the polyphase filter used in the simulations of FIGS. 21 and 22 are R ₁₆ = R ₂₆ = R ₃₆ = 50Ω, C ₁₆ = 2.12 pF, C ₂₆ = 3.18 pF, and C ₃₆ = 63.7 pF. . 2 and 3, it can be seen that a wide frequency characteristic of 0.9 to 4.0 GHz is obtained in a frequency range in which the phase difference is 45 ± 2.5 degrees and the amplitude error is 0 ± 1 dB. As described above, in the first embodiment, it is possible to increase the bandwidth of both the phase characteristic and the amplitude characteristic.

Next, the polyphase filter has a two-input structure in which the first and second input terminals shown in FIG. 23 are connected and the third and fourth input terminals are connected, and each input terminal has a phase of 180 degrees. A case where a configuration for inputting different signals is used will be described.
In FIG. 23, 171 and 172 are input terminals, 173, 174, 175 and 176 are output terminals, 177, 178, 179 and 180 are resistance elements having a resistance value of R ₁₇ , and 181, 182, 183 and 184 are resistance values. resistance elements R _27, the resistance element having a resistance value of _{R 37} is 185,186,187,188, 189,190,191,192 the capacitor element of the capacitance value _{C 17,} 193,194,195,196 capacitance value Is a C ₂₇ capacitive element, and 197, 198, 199, and 200 are C ₃₇ capacitive elements. FIG. 25 is a simulation result of the amplitude characteristics of the polyphase filter shown in FIG. 23, and it can be seen that a low amplitude error is realized over a wide band. On the other hand, the phase characteristic has frequency dependence as shown in FIG. 24, and the phase error increases at 2 GHz or more.

  However, the polyphase filter of FIG. 23 is used in the configuration of FIG. 1 as a four-phase power distributor, and the first to fourth output terminals (A, B, C, and D in FIG. 1) of the polyphase filter are respectively When terminals having numbers corresponding to the first to fourth input terminals (A ′, B ′, C ′, D ′ in FIG. 1) of the phase shifter are connected to each other, the amplitude error at 2 GHz or more of the polyphase filter Since the increase and the increase in the amplitude error and the increase in phase error of the RC phase shifter are compensated for each other, the phase shifter having the configuration shown in FIG. 1 can realize a wide band characteristic.

The element constants of the polyphase filter used in the simulations of FIGS. 21 and 22 are R ₁₆ = R ₂₆ = R ₃₆ = 50Ω, C ₁₆ = 2.12 pF, C ₂₆ = 3.18 pF, and C ₃₆ = 63.7 pF. . 27 and 28, it can be seen that a wide frequency range of 0.9 to 4.0 GHz is obtained in the frequency range where the phase difference is 45 ± 2.5 degrees and the amplitude error is 0 ± 1 dB. As described above, in this embodiment, it is possible to increase the bandwidth of both the phase characteristic and the amplitude characteristic.

[Second Embodiment]
FIG. 4 is a circuit configuration diagram showing the configuration of the broadband phase shifter according to the second embodiment of the present invention. In the figure, an input terminal 21, 22, 23, 24, 25 an output terminal, 26 is 4-phase power divider, _R 19 27, 28, 29, 30 has a resistance value _{respectively, R 29, R 19, R} 29 The resistive elements 31, 32, 33, 34, 35, 36, 37, and 38 have capacitance values of C ₁₉ , C ₂₉ , C ₁₉ , C ₂₉ , C ₃₉ , C ₄₉ , C ₃₉ , and C ₄₉ , respectively. It is.

  One end of the resistor element 27 and one end of the capacitor element 31 are connected to the output terminal A of the four-phase power distributor 26, and one end of the resistor element 28 and one end of the capacitor element 32 are connected to the output terminal B of the four-phase power distributor 26. Then, one end of the resistive element 29 and one end of the capacitive element 33 are connected to the output terminal C of the four-phase power distributor 26, and one end of the resistive element 30 and one end of the capacitive element 34 are connected to the output terminal D of the four-phase power distributor. One end of the capacitive element 31 is connected to the other end of the resistive element 27, one end of the capacitive element 32 is connected to the other end of the resistive element 28, and one end of the capacitive element 33 is connected to the other end of the resistive element 29. One end of the capacitive element 34 is connected to the other end of the resistive element 30, the other end of the capacitive element 38 and the first output terminal are connected to the other end of the capacitive element 31, and the capacitive element 35 is connected to the other end of the capacitive element 32. To the other output terminal and the second output terminal. Connect the other end and a third output terminal of the capacitor 36 to the other end of 33 is connected to the other end and a fourth output terminal of the capacitor 37 to the other end of the capacitive element 34.

Here, the simulation result of this wideband x degree phase shifter is shown by taking x = 45 as an example. 5 and 6 show the numerical simulation results of the phase difference and amplitude error of the phase shifter shown in FIG. The respective element constants are R ₁₉ = 24.5Ω, R ₂₉ = 2000Ω, C ₁₉ = 1.52 pF, C ₂₉ = 0.64 pF, C ₃₉ = 1.69 pF, and C ₄₉ = 17.6 pF. Here, as in the first embodiment, the three-stage polyphase type four-phase power divider shown in FIG. 20 is used as the broadband 90-degree power divider. 5 and 6, it can be seen that a wide frequency range of 1.0 to 5.8 GHz is obtained in the frequency range where the phase difference is 45 ± 2.5 degrees and the amplitude error is 0 ± 1 dB.
As described above, also in the second embodiment, it is possible to increase the bandwidth of both the phase characteristic and the amplitude characteristic.

[Third Embodiment]
FIG. 7 is a circuit configuration diagram showing the configuration of the broadband phase shifter according to the third embodiment of the present invention. In FIG. 7, 41 is an input terminal, 42, 43, 44 and 45 are output terminals, 46 is a four-phase power distributor, 47, 48, 49, 50, 51, 52, 53 and 54 have resistance values of R _{10. , R 20, R 10, R} 20, R 30, R 40, R 30, resistance elements _{R 40,} 55, 56, 57, 58 the capacity of each capacitance value _{C 10, C 20, C 10} , C 20 It is an element.

  One end of the resistor element 47 and one end of the capacitor element 55 are connected to the output terminal A of the four-phase power distributor 46, and one end of the resistor element 48 and one end of the capacitor element 56 are connected to the output terminal B of the four-phase power distributor 46. One end of the resistor element 49 and one end of the capacitor element 57 are connected to the output terminal C of the four-phase power distributor 46, and one end of the resistor element 50 and one end of the capacitor element 58 are connected to the output terminal D of the four-phase power distributor 46. , One end of the resistive element 51 is connected to the other end of the capacitive element 55, one end of the resistive element 52 is connected to the other end of the capacitive element 56, and one end of the resistive element 53 is connected to the other end of the capacitive element 57 One end of the resistance element 54 is connected to the other end of the capacitive element 58, the other end of the resistance element 54 and the first output terminal are connected to the other end of the resistance element 47, and the resistance element 48 is connected to the other end of the resistance element 48. Connect the other end of 51 and the second output terminal. Connect the other end and a third output terminal of the resistor 52 to the other end of the element 49, connecting the other end and a fourth output terminal of the resistor 53 to the other end of the resistor element 50.

Here, the simulation result of this wideband x degree phase shifter is shown by taking x = 45 as an example. 8 and 9 show numerical simulation results of the phase difference and amplitude error of the phase shifter of FIG. The respective element constants are R ₁₀ = 10.0Ω, R ₂₀ = 24.2Ω, R ₃₀ = 35.3Ω, R ₄₀ = 3000Ω, C ₁₀ = 4.93 pF, and C ₂₀ = 14.2 pF. Here, as in the first embodiment, the polyphase type four-phase power distributor having a three-stage configuration shown in FIG. 20 is used as the wideband 90-degree power distributor. 8 and 9, it can be seen that a wide frequency characteristic of 1.1 to 5.7 GHz is obtained in a frequency range in which the phase difference is 45 ± 2.5 degrees and the amplitude error is 0 ± 1 dB. As described above, in this embodiment, it is possible to increase the bandwidth of both the phase characteristic and the amplitude characteristic.

[Fourth Embodiment]
FIG. 10 is a circuit configuration diagram showing the configuration of the wideband phase shifter according to the fourth embodiment of the present invention. In FIG. 10, 61 is an input terminal, 62, 63,... 64, 65 are output terminals, 66 is a four-phase power divider, 67, 68, 69, 70, 71, 72, 73, 74 have resistance values R. ₁₈ , R ₂₈ , R ₁₈ , R ₂₈ , R ₃₈ , R ₄₈ , R ₃₈ , R ₄₈ resistance elements, 75, 76, 77, 78, 79, 80, 81, 82 have capacitance values C ₁₈ , C respectively. ₂₈ , C ₁₈ , C ₂₈ , C ₃₈ , C ₄₈ , C ₃₈ , and C ₄₈ capacitive elements. One end of the resistor element 67 and one end of the capacitor element 79 are connected to the output terminal A of the four-phase power distributor 66, and one end of the resistor element 68 and one end of the capacitor element 80 are connected to the output terminal B of the four-phase power distributor 66. One end of the resistor element 69 and one end of the capacitor element 81 are connected to the output terminal C of the four-phase power distributor 66, and one end of the resistor element 70 and one end of the capacitor element 82 are connected to the output terminal D of the four-phase power distributor 66. , One end of the capacitive element 75 is connected to the other end of the resistive element 67, one end of the capacitive element 76 is connected to the other end of the resistive element 68, and one end of the capacitive element 77 is connected to the other end of the resistive element 69. One end of the capacitor element 78 is connected to the other end of the resistor element 70, one end of the resistor element 71 is connected to the other end of the capacitor element 79, one end of the resistor element 72 is connected to the other end of the capacitor element 80, One end of the resistance element 73 is connected to the other end of the capacitive element 81. One end of the resistor element 74 is connected to the other end of the capacitor element 82, the other end of the resistor element 74 and the first output terminal are connected to the other end of the capacitor element 75, and the resistor element is connected to the other end of the capacitor element 76. The other end of 71 is connected to the second output terminal, the other end of the resistive element 72 is connected to the other end of the capacitive element 77, and the other end of the resistive element 73 is connected to the other end of the capacitive element 78. And the fourth output terminal are connected.

Here, the simulation result of this wideband x degree phase shifter is shown by taking x = 45 as an example. 11 and 12 show the numerical simulation results of the phase difference and amplitude error of the power distributor of FIG. The respective element constants are R ₁₈ = 20.2Ω, R ₂₈ = 251.8Ω, R ₃₈ = 63.9Ω, R ₄₈ = 268.6Ω, C ₁₈ = 0.31 pF, C ₂₈ = 0.33 pF, C ₃₈ = 0.84 pF, C ₄₈ = 38.2 pF. Here, as in the first embodiment, the three-phase polyphase type four-phase power divider shown in FIG. 20 is used as the four-phase power divider. 11 and 12, it can be seen that a wide frequency characteristic of 0.9 to 8.5 GHz is obtained in a frequency range in which the phase difference is 45 ± 2.5 degrees and the amplitude error is 0 ± 1 dB. As described above, in this embodiment, it is possible to increase the bandwidth of both the phase characteristic and the amplitude characteristic.
[Other Embodiments]
The above-described embodiments are merely illustrative of the embodiments of the present invention and are not intended to be limiting. The present invention can be implemented in various other modifications and changes.

The circuit block diagram which shows the structure of the wideband phase shifter of the 1st Embodiment of this invention. The frequency characteristic figure of the phase difference by simulation in the specific example of the wideband phase shifter of the 1st Embodiment of this invention. The frequency characteristic figure of the amplitude error by simulation in the specific example of the wideband phase shifter of the 1st Embodiment of this invention. The circuit block diagram which shows the structure of the wideband phase shifter of the 2nd Embodiment of this invention. The frequency characteristic figure of the phase difference by simulation in the specific example of the wideband phase shifter of the 2nd Embodiment of this invention. The frequency characteristic figure of the amplitude error by simulation in the specific example of the wideband phase shifter of the 2nd Embodiment of this invention. The circuit block diagram which shows the structure of the wideband phase shifter of the 3rd Embodiment of this invention. The frequency characteristic figure of the phase difference by simulation in the specific example of the wideband phase shifter of the 3rd Embodiment of this invention. The frequency characteristic figure of the amplitude error by simulation in the specific example of the wideband phase shifter of the 3rd Embodiment of this invention. The circuit block diagram which shows the structure of the wideband phase shifter of the 4th Embodiment of this invention. The frequency characteristic figure of the phase difference by simulation in the specific example of the wideband phase shifter of the 4th Embodiment of this invention. The frequency characteristic figure of the amplitude error by simulation in the specific example of the wideband phase shifter of the 4th Embodiment of this invention. The circuit block diagram which shows the structure of the conventional phase shifter. The frequency characteristic figure of the phase difference by the simulation in the specific example of the conventional phase shifter. The frequency characteristic figure of the amplitude error by simulation in the specific example of the conventional phase shifter. The circuit block diagram which shows the structure of the conventional wideband phase shifter. The frequency characteristic figure of the phase difference by simulation in the specific example of the conventional broadband phase shifter. The frequency characteristic figure of the amplitude error by simulation in the specific example of the conventional broadband phase shifter. The circuit block diagram which shows the structure of the orthogonal modulator / demodulator using the conventional direct conversion system. The circuit diagram which shows the structure of a polyphase filter. The frequency characteristic figure of the phase difference by simulation in the polyphase filter of FIG. The frequency characteristic figure of the amplitude error by simulation in the polyphase filter of FIG. The circuit diagram which shows the structure of a polyphase filter. The frequency characteristic figure of the phase difference by simulation in the polyphase filter of FIG. . The frequency characteristic figure of the amplitude error by simulation in the polyphase filter of FIG. 1 is a circuit diagram of a wideband phase shifter according to a first embodiment of the present invention comprising a polyphase filter having a single-stage configuration and an RC phase shifter; FIG. The frequency characteristic figure of the phase difference by simulation in the specific example of the wideband phase shifter of 1st Embodiment in this invention. The frequency characteristic figure of the amplitude error by simulation in the specific example of the wideband phase shifter of 1st Embodiment in this invention. The circuit diagram which shows the polyphase filter of 1 step | paragraph structure.

Explanation of symbols

1, 21, 41, 61, 91, 101, 141, 142, 171, 172,
201, 202, 231, 232: input terminals 2, 3, 4, 5, 22, 23, 24, 25, 42, 43, 44, 45, 62,
63, 64, 65, 92, 93, 102, 103, 143, 144, 145,
146, 173, 174, 175, 176, 203, 204, 205, 206, 233, 234, 235, 236: output terminals 6, 26, 46, 66, 223: polyphase type four-phase power distributors 7 to 10, 27-30, 47-54, 67-74, 94, 95, 104-107,
147 to 158, 177 to 188, 207 to 214, 237 to 240: resistance elements 11 to 14, 31 to 38, 55 to 58, 75 to 82, 96, 97, 108 to
111, 159 to 170, 189 to 200, 215 to 222, 241 to 245: Capacitance element 131: RF signal input / output terminal 132: Local oscillator 133, 134: Baseband signal input / output terminal 135: In-phase power distribution and synthesis circuit 136: 45 degree power divider 137, 138: even harmonic mixer

Claims (6)

A polyphase filter type four-phase power distributor that is composed of a resistive element and a capacitive element and outputs a 0 degree phase signal, a 90 degree phase signal, a 180 degree phase signal, and a 270 degree phase signal of input power;
The four signals output from the polyphase filter type four-phase power distributor are input, and phase differences of 0 degrees, x degrees, 180 degrees, and (180 + x) degrees with respect to an arbitrary value x of 0 <x <90 And an x degree phase shifter that outputs four signals having
As the x degree phase shifter,
One end of the first resistor element and one end of the first capacitor element are connected to the first input terminal, one end of the second resistor element and one end of the second capacitor element are connected to the second input terminal, One end of the third resistor element and one end of the third capacitor element are connected to the third input terminal, and one end of the fourth resistor element and one end of the fourth capacitor element are connected to the fourth input terminal, The other end of the fourth capacitive element and the first output terminal are connected to the other end of the first resistive element, and the other end of the first capacitive element and the second output terminal are connected to the other end of the second resistive element. 2 output terminals, the other end of the second capacitor element and the third output terminal are connected to the other end of the third resistor element, and the other end of the fourth resistor element is connected to the other end of the fourth resistor element. Using an RC phase shifter in which the other end of the third capacitive element and the fourth output terminal are connected,
A terminal for outputting a 0 degree phase signal of the polyphase filter type four-phase power distributor is connected to a first input terminal of the x degree phase shifter, and the polyphase is connected to a second input terminal of the x degree phase shifter. A terminal for outputting a 90 degree phase signal of the filter type four-phase power distributor is connected, and a 180 degree phase signal of the polyphase filter type four phase power distributor is outputted to a third input terminal of the x degree phase distributor. A broadband phase shifter characterized in that a terminal is connected and a terminal for outputting a 270 degree phase signal of the polyphase filter type four-phase power distributor is connected to a fourth input terminal of the x degree phase shifter. A polyphase filter type four-phase power distributor that is composed of a resistive element and a capacitive element and outputs a 0 degree phase signal, a 90 degree phase signal, a 180 degree phase signal, and a 270 degree phase signal of input power;
The four signals output from the polyphase filter type four-phase power distributor are input, and phase differences of 0 degrees, x degrees, 180 degrees, and (180 + x) degrees with respect to an arbitrary value x of 0 <x ≦ 90 And an x degree phase shifter that outputs four signals having
As the x degree phase shifter,
One end of the first resistor element and one end of the first capacitor element are connected to the first input terminal, one end of the second resistor element and one end of the second capacitor element are connected to the second input terminal, One end of the third resistor element and one end of the third capacitor element are connected to the third input terminal, and one end of the fourth resistor element and one end of the fourth capacitor element are connected to the fourth input terminal, One end of a fifth capacitor element is connected to the other end of the first resistor element, one end of a sixth capacitor element is connected to the other end of the second resistor element, and the other one of the third resistor elements. One end of the seventh capacitive element is connected to the end, one end of the eighth capacitive element is connected to the other end of the fourth resistive element, and the fourth capacitive element is connected to the other end of the fifth capacitive element The other end of the first capacitor and the second output terminal are connected to the other end of the sixth capacitor. The other end of the second capacitor element and the third output terminal are connected to the other end of the seventh capacitor element, and the other end of the third capacitor element is connected to the other end of the eighth capacitor element. And an RC phaser connected to the fourth output terminal,
A terminal for outputting a 0 degree phase signal of the polyphase filter type four-phase power distributor is connected to a first input terminal of the x degree phase shifter, and the polyphase is connected to a second input terminal of the x degree phase shifter. A terminal for outputting a 90 degree phase signal of the filter type four-phase power distributor is connected, and a 180 degree phase signal of the polyphase filter type four phase power distributor is outputted to a third input terminal of the x degree phase distributor. A broadband phase shifter characterized in that a terminal is connected and a terminal for outputting a 270 degree phase signal of the polyphase filter type four-phase power distributor is connected to a fourth input terminal of the x degree phase shifter. A polyphase filter type four-phase power distributor that is composed of a resistive element and a capacitive element and outputs a 0 degree phase signal, a 90 degree phase signal, a 180 degree phase signal, and a 270 degree phase signal of input power;
The four signals output from the polyphase filter type four-phase power distributor are input, and phase differences of 0 degrees, x degrees, 180 degrees, and (180 + x) degrees with respect to an arbitrary value x of 0 <x ≦ 90 And an x degree phase shifter that outputs four signals having
As the x degree phase shifter,
One end of the first resistor element and one end of the first capacitor element are connected to the first input terminal, one end of the second resistor element and one end of the second capacitor element are connected to the second input terminal, One end of the third resistor element and one end of the third capacitor element are connected to the third input terminal, and one end of the fourth resistor element and one end of the fourth resistor element are connected to the fourth input terminal, One end of a fifth resistor element is connected to the other end of the first capacitor element, one end of a sixth resistor element is connected to the other end of the second capacitor element, and the other one of the third capacitor elements. One end of a seventh resistor element is connected to the end, one end of an eighth resistor element is connected to the other end of the fourth capacitor element, and the eighth resistor element is connected to the other end of the first resistor element The other end of the fifth resistor and the second output terminal are connected to the other end of the second resistor. The other end of the sixth resistor element and the third output terminal are connected to the other end of the third resistor element, and the other end of the seventh resistor element is connected to the other end of the fourth resistor element. And an RC phaser connected to the fourth output terminal,
A terminal for outputting a 0 degree phase signal of the polyphase filter type four-phase power distributor is connected to a first input terminal of the x degree phase shifter, and the polyphase is connected to a second input terminal of the x degree phase shifter. A terminal for outputting a 90 degree phase signal of the filter type four-phase power distributor is connected, and a 180 degree phase signal of the polyphase filter type four phase power distributor is outputted to a third input terminal of the x degree phase distributor. A broadband phase shifter characterized in that a terminal is connected and a terminal for outputting a 270 degree phase signal of the polyphase filter type four-phase power distributor is connected to a fourth input terminal of the x degree phase shifter. A polyphase filter type four-phase power divider configured of a resistance element and a capacitance element and outputting a 0 degree phase signal, a 90 degree phase signal, a 180 degree phase signal, and a 270 degree phase signal of input power;
The four signals output from the polyphase filter type four-phase power distributor are input, and phase differences of 0 degrees, x degrees, 180 degrees, and (180 + x) degrees with respect to an arbitrary value x of 0 <x ≦ 90 are input. It consists of an x degree phase shifter that outputs 4 signals,
As the x degree phase shifter,
One end of the first resistor element and one end of the first capacitor element are connected to the first input terminal, one end of the second resistor element and one end of the second capacitor element are connected to the second input terminal, One end of the third resistor element and one end of the third capacitor element are connected to the third input terminal, and one end of the fourth resistor element and one end of the fourth capacitor element are connected to the fourth input terminal, One end of a fifth capacitor element is connected to the other end of the first resistor element, one end of a sixth capacitor element is connected to the other end of the second resistor element, and the other one of the third resistor elements. One end of the seventh capacitor element is connected to the end, one end of the eighth capacitor element is connected to the other end of the fourth resistor element, and the other end of the fifth capacitor element is connected to the other end of the first capacitor element. One end is connected, one end of a sixth resistor element is connected to the other end of the second capacitor element, and a seventh resistor element is connected to the other end of the third capacitor element. Connect the end,
One end of an eighth resistor element is connected to the other end of the fourth capacitor element, the other end of the eighth resistor element and a first output terminal are connected to the other end of the fifth capacitor element; The other end of the fifth resistive element and the second output terminal are connected to the other end of the sixth capacitive element, and the other end of the sixth resistive element and the second output terminal are connected to the other end of the seventh capacitive element. 3 using an RC phase shifter in which the other output terminal of the seventh resistance element and the fourth output terminal are connected to the other end of the eighth capacitive element.
A terminal for outputting a 0 degree phase signal of the polyphase filter type four-phase power distributor is connected to a first input terminal of the x degree phase shifter, and the polyphase is connected to a second input terminal of the x degree phase shifter. A terminal for outputting a 90 degree phase signal of the filter type four-phase power distributor is connected, and a 180 degree phase signal of the polyphase filter type four phase power distributor is outputted to a third input terminal of the x degree phase distributor. A broadband phase shifter characterized in that a terminal is connected and a terminal for outputting a 270 degree phase signal of the polyphase filter type four-phase power distributor is connected to a fourth input terminal of the x degree phase shifter. The wideband phase shifter according to any one of claims 1 to 4, wherein the polyphase filter type four-phase power distributor is
The basic block connects one end of the first resistor element and one end of the first capacitor element to the first input terminal, and one end of the second resistor element and one end of the second capacitor element to the second input terminal. One end of the third resistor element and one end of the third capacitor element are connected to the third input terminal, and one end of the fourth resistor element and one end of the fourth capacitor element are connected to the fourth input terminal. The other end of the fourth capacitor element and the first output terminal are connected to the other end of the first resistor element, and the other end of the second resistor element is connected to the other end of the first capacitor element. And the other end of the third resistive element is connected to the other end of the second capacitive element and the third output terminal is connected to the other end of the fourth resistive element. The other end of the third capacitive element and a fourth output terminal are connected,
When the basic block has a multi-stage configuration, the first output terminal of the rear stage is connected to the first output terminal, the second input terminal of the rear stage is connected to the second output terminal, and the third output terminal To the third input terminal of the rear stage, and the fourth input terminal of the rear stage to the fourth output terminal,
The second and fourth input terminals in the first-stage basic block are grounded, and a signal having a phase difference of 180 degrees is input to the first and third input terminals, and 0, 90, and 180 degrees are input. A wide-band phase shifter using a polyphase filter type four-phase power distributor that outputs four signals having a phase difference of 270 degrees. The wideband phase shifter according to any one of claims 1 to 4, wherein the polyphase filter type four-phase power distributor is
Basic block
One end of the first resistor element and one end of the first capacitor element are connected to the first input terminal, one end of the second resistor element and one end of the second capacitor element are connected to the second input terminal, One end of the third resistor element and one end of the third capacitor element are connected to the third input terminal, and one end of the fourth resistor element and one end of the fourth capacitor element are connected to the fourth input terminal, The other end of the fourth capacitor element and the first output terminal are connected to the other end of the first resistor element, and the other end of the first capacitor element is connected to the other end of the second resistor element. A second output terminal is connected, the other end of the second capacitive element and a third output terminal are connected to the other end of the third resistance element, and the other end of the fourth resistance element is connected to the second output terminal. 3 is connected to the other end of the capacitive element and the fourth output terminal,
In the case where the basic block has a multi-stage configuration, a first input terminal at a subsequent stage is connected to a first output terminal, a second input terminal at a subsequent stage is connected to a second output terminal, and a third output terminal To the third input terminal of the rear stage, and the fourth input terminal of the rear stage to the fourth output terminal,
A signal having a phase difference of 0 degrees is input to the first and second input terminals of the first-stage basic block, and a phase difference of 180 degrees is input to the third and fourth input terminals, respectively. A broadband phase shifter using a polyphase filter type four-phase power distributor that outputs four signals having a phase difference of 270 degrees.

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