CN2751481Y

CN2751481Y - Microwave millimeter wave wideband 3-decibel quadrature digital phase shifter

Info

Publication number: CN2751481Y
Application number: CN 200420109378
Authority: CN
Inventors: 戴永胜; 张晓�; 陆言亮; 沈博
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2004-12-03
Filing date: 2004-12-03
Publication date: 2006-01-11
Anticipated expiration: 2014-12-03

Abstract

The utility model relates to a microwave millimeter wave wideband 3-decibel quadrature digital phase shifter which comprises a wideband 3-decibel quadrature directional coupler, wherein an isolation end which corresponds to the input end of the wideband 3-decibel quadrature directional coupler is connected with a wideband standard 50 ohm matching load, a through end which corresponds to the input end of the wideband 3-decibel quadrature directional coupler is connected with a branch port of a wideband matching type SPDT switch, and a K1 and a K2 are two control ends of the matching type SPDT switch. Control signals respectively control a microwave millimeter-wave signal to be input/output from one port of the wideband matching type SPDT switch, or to be output/input from the other port of the wideband matching type SPDT switch so that the microwave millimeter-wave signal is output/input from the common end of the wideband matching type SPDT switch. The utility model has the advantages of simple circuit topology and design, simple manufacturing process, large improvement of electrical performance, high precision of the band width of the working frequency and the phase shift, low standing wave ratio of the input voltage and the output voltage, and small difference value of the insertion loss of each state.

Description

Microwave millmeter wave broad band three decibel orthogonal digital phase shifter

One technical field

The utility model relates to a kind of electronic unit of communicating by letter, guiding of being used to, particularly a kind of microwave millmeter wave broad band three decibel orthogonal digital phase shifter.

Two background technologies

Microwave and millimeter wave broad band three decibel quadrature phase shifter is a kind of electronic unit that is mainly used in the electronic system equipment such as digital microwave telecommunication, mobile communication, radar, electronic countermeasures and guidance instrument.In the control circuit of wide-band microwave millimeter wave frequency band, digital phase shifter is one of microwave and millimeter wave major control circuit, and the key technical indexes of describing this properties of product has: 1) operational frequency bandwidth; 2) phase shift figure place; 3) phase-shift phase 4) the phase shift precision; 5) insert loss; 6) each attitude is inserted loss difference; 7) each attitude input and output side voltage standing wave ratio; 8) switching speed; 9) circuit size; 10) 1 decibel of compression of power output level; 11) consistency of electrical property between circuit.The like product of 90 degree (quadrature) phase-shift phase digital phase shifters, because circuit topology that design is adopted and technology realize the defective of approach, bandwidth, phase-shift phase are big in addition, no matter be to adopt modes such as coaxial, waveguide, mixing are integrated, LTCC stereo integrated circuit, still adopt the GaAs single-chip IC regime to realize, electrical performance indexes is all relatively poor usually.Major defect has: 1) circuit topology complexity; 2) design difficulty is big; 3) the processes difficulty is big; 4) phase shift precision is low; 5) input and output side voltage standing wave(VSW) ratio; 6) operational frequency bandwidth is narrower; 7) rate of finished products is lower; 8) influenced by process control parameter, electrical property consistency is relatively poor between circuit; 9) circuit size is bigger.

Three summary of the invention

The purpose of this utility model is to provide a kind of circuit topological structure simple, design easy, technology difficulty is little, can improve the phase shift precision, improve the input and output side voltage standing wave ratio of each attitude, the broadening operational frequency bandwidth, reduce each attitude and insert loss difference, make that electrical property consistency is subjected to process control parameter to influence minimum between the circuit, the rate of finished products height reduces the microwave millmeter wave broad band three decibel orthogonal digital phase shifter of circuit size.

The technical solution that realizes the utility model purpose is: a kind of microwave millmeter wave broad band three decibel orthogonal digital phase shifter, it is characterized in that: it is by the broad band three decibel directional coupler, Broadband Matching type single-pole double-throw switch (SPDT) and wide-bandwidth standards matched load are formed, the isolation termination wide-bandwidth standards matched load corresponding with the orthogonal directed coupler signal of broad band three decibel I/O end, the I/O end of a branch road of the straight-through termination Broadband Matching type single-pole double-throw switch (SPDT) corresponding with the orthogonal directed coupler signal of broad band three decibel I/O end, the I/O end of another branch road of the coupling termination Broadband Matching type single-pole double-throw switch (SPDT) corresponding with the orthogonal directed coupler signal of broad band three decibel I/O end, the public road of Broadband Matching type single-pole double-throw switch (SPDT) connects another signal output/input, another branch road of branch road conducting in K1 and two branch roads of K2 control Broadband Matching type single-pole double-throw switch (SPDT) ends, or a branch road is by another branch road conducting.

The utility model compared with prior art, its remarkable advantage is: 1, circuit topology is simple, this phase shifter is in fact by constituting in orthogonal directed coupler of broad band three decibel and the Broadband Matching type single-pole double-throw switch (SPDT); 2, as long as simplicity of design the design orthogonal directed coupler of broad band three decibel and Broadband Matching type single-pole double-throw switch (SPDT), and designs many more than the simplicity of design of like product of the orthogonal directed coupler of broad band three decibel and Broadband Matching type single-pole double-throw switch (SPDT); 3, technology difficulty and control precision require low more than like product in the manufacturing; 4, rate of finished products is than like product height; 5, electrical property improves big, because orthogonal directed coupler of broad band three decibel and Broadband Matching type single-pole double-throw switch (SPDT) electrical property are easier to design and make, so this phase shifter: it is little that operational frequency bandwidth, phase shift precision height, input and output voltage standing wave ratio are low, each attitude is inserted loss difference; 6, electrical property batch high conformity between the circuit; 7, circuit size is little; 8, cost is low; 9, because the electrical property excellence can adopt the three-stage cascade mode to constitute the quarternary phase-shift keying (QPSK) phase modulator this phase shifter.

Four description of drawings

Fig. 1 is the circuit structure block diagram of microwave millmeter wave broad band three decibel orthogonal digital phase shifter of the present utility model.

Fig. 2 is the circuit structure block diagram of Broadband Matching type single-pole double-throw switch (SPDT) of the present utility model.

Fig. 3 is the electrical schematic diagram that microwave millmeter wave broad band three decibel orthogonal digital phase shifter field-effect transistors of the present utility model realizes Broadband Matching type single-pole double-throw switch (SPDT).

Fig. 4 is microwave millmeter wave broad band three decibel orthogonal digital phase shifter of the present utility model is realized Broadband Matching type single-pole double-throw switch (SPDT) with PIN diode a electrical schematic diagram.

Five embodiments

Below in conjunction with accompanying drawing the utility model is described in further detail.

Embodiment 1.In conjunction with Fig. 1, Fig. 2, Fig. 3, microwave millmeter wave broad band three decibel orthogonal digital phase shifter of the present utility model, it is made of the orthogonal directed coupler A of broad band three decibel, Broadband Matching type single-pole double-throw switch (SPDT) B and 50 ohm of matched load C three parts of wide-bandwidth standards, comprising the orthogonal directed coupler A of broad band three decibel, Broadband Matching type single-pole double-throw switch (SPDT) B and 50 ohm of matched load C of wide-bandwidth standards.The orthogonal directed coupler A of broad band three decibel input is a microwave and millimeter wave signal I/O end, the isolation end corresponding with the orthogonal directed coupler A of broad band three decibel input connects 50 ohm of matched load C of a wide-bandwidth standards, the straight-through end corresponding with the orthogonal directed coupler A of broad band three decibel input connects the port of a branch road of Broadband Matching type single-pole double-throw switch (SPDT) B, the coupled end corresponding with the orthogonal directed coupler A of broad band three decibel input connects the port of another branch road of Broadband Matching type single-pole double-throw switch (SPDT) B, and the common port of Broadband Matching type single-pole double-throw switch (SPDT) B is the output/input of microwave and millimeter wave signal.

K1 and K2 are two control ends of Broadband Matching type single-pole double-throw switch (SPDT), controlling another branch road of branch road conducting of Broadband Matching type single-pole double-throw switch (SPDT) respectively by control signal ends, or a branch road is by another branch road conducting, externally present matching status by the road output, the microwave and millimeter wave signal of conducting branch road is from the common port output/input of broadband matching type single-pole double-throw switch (SPDT).The orthogonal directed coupler of broad band three decibel can be made of the interdigitated Lange three dB directional coupler of planar microstrip DC1, or constitute, or constitute by the strip line hybrid circuit three dB directional coupler DC3 of multilayer circuit board lamination by the three-dimensional integrated three dB directional coupler DC2 of low-temp, co-fired ceramic multi-layer.

Arbitrary port of the orthogonal directed coupler of broad band three decibel (DC) is a microwave and millimeter wave signal I/O end (P2), connect 50 ohm of matched loads of wide-bandwidth standards (LOAD) with the isolation end of the corresponding DC of P2, connect the end of microstrip line W8 in the Broadband Matching type single-pole double-throw switch (SPDT) that constitutes by field-effect transistor with the coupled end of the corresponding DC of P2, the source electrode of another termination field-effect transistor T6 of W8 and an end of resistance R 7, the drain electrode of another termination T6 of R7 and the end of microstrip line W7, the end of the grid connecting resistance R6 of T6, the other end of R6 connects control end K2, the end of another termination microstrip line W6 of W7 and the drain electrode of field-effect transistor T5, the source ground of T5, the end of the grid connecting resistance R5 of T5, the other end of R5 connects control end K1, the end of another termination microstrip line W5 of W6 and the drain electrode of field-effect transistor T4, the source ground of T4, the end of the grid connecting resistance R4 of T4, the other end of R4 connects control end K1, the end of another termination microstrip line W4 of W5 and the drain electrode of field-effect transistor T3, the source ground of T3, the end of the grid connecting resistance R3 of T3, the other end of R3 connects control end K1, the end of another termination microstrip line W3 of W4 and the drain electrode of field-effect transistor T2, the source ground of T2, the end of the grid connecting resistance R2 of T2, the other end of R2 connects control end K1, the source electrode of another termination field-effect transistor T1 of W3, the drain electrode of T4 connects the end of W2, the end of the grid connecting resistance R1 of T1, the other end of R1 connects control end K2, another termination microstrip line W1 of W2 and the end (common port) of microstrip line W12, another termination microwave and millimeter wave signal output/input (P1) of W1, connect the end of microstrip line W18 in the Broadband Matching type single-pole double-throw switch (SPDT) that constitutes by field-effect transistor with the straight-through end of the corresponding DC of P2, the source electrode of another termination field-effect transistor T16 of W18 and an end of resistance R 17, the drain electrode of another termination T16 of R17 and the end of microstrip line W17, the end of the grid connecting resistance R16 of T16, the other end of R16 connects control end K1, the end of another termination microstrip line W16 of W17 and the drain electrode of field-effect transistor T15, the source ground of T15, the end of the grid connecting resistance R15 of T15, the other end of R15 connects control end K2, the end of another termination microstrip line W15 of W16 and the drain electrode of field-effect transistor T14, the source ground of T14, the end of the grid connecting resistance R14 of T14, the other end of R14 connects control end K2, the end of another termination microstrip line W14 of W15 and the drain electrode of field-effect transistor T13, the source ground of T13, the end of the grid connecting resistance R13 of T13, the other end of R13 connects control end K2, the end of another termination microstrip line W13 of W14 and the drain electrode of field-effect transistor T12, the source ground of T12, the end of the grid connecting resistance R12 of T12, the other end of R12 connects control end K2, the source electrode of another termination field-effect transistor T11 of W13, the drain electrode of T14 connects the end of W12, the end of the grid connecting resistance R11 of T11, the other end of R11 connects control end K12, another termination microstrip line W1 of W12 and the end (common port) of microstrip line W2.

The three dB directional coupler that the orthogonal directed coupler A of broad band three decibel is made of the interdigitated coupled microstrip line coupled structure in plane (DC1), have four ports promptly: input, straight-through end, coupled end and isolation end, the signal amplitude relationship description that each port of the orthogonal directed coupler of this broad band three decibel has is as follows: can select arbitrary port is input, signal directly is straight-through end by the port of (direct-current short circuit), amplitude is approximately equal to half (promptly reducing three decibels) of input signal amplitude, by the output of coupling (direct current open circuit) signal, and amplitude to be approximately equal to half port of input signal amplitude be coupled end, by coupling (direct current open circuit) signal output amplitude minimum is isolation end.The signal phase relationship description that each port of the orthogonal directed coupler of this broad band three decibel has is as follows: when each port is in matching status, wide band microwave or millimeter-wave signal are imported from input, its coupled end is the fixed phase end of broadband phase of output signal, the phase place of its straight-through end broadband output signal is compared quadrature lagging (quadrature) with the fixed phase of coupled end broadband output signal, or otherwise the phase place that will lead directly to end broadband output signal is as the reference phase place, then the phase place of coupled end broadband output signal is compared leading 90 degree with the fixed phase of straight-through end broadband output signal, its isolation end since through path and coupling path the broadband of isolation end phase of output signal oppositely (promptly 180 spend), the amplitude of two-way broadband output signal is cancelled out each other, so, in the amplitude minimum of isolation end broadband output signal.The orthogonal directed coupler of this broad band three decibel can be realized with the interdigitated coupling microstrip line structure in plane (DC1), also can realize with low temperature co-fired multilayer ceramic structure (DC2), can also adopt the dielectric circuit plate stacked system (DC3) of multilayer and the coupled modes of other structure to realize, operation principle and DC1 are identical, difference is on the implementation structure of its signal energy coupled modes, and the coupled modes of DC2 and DC3 and other structure can also can be three-dimensional three-dimensional coupling modes with the two-dimensional plane coupled modes both.Utilize straight-through end of the orthogonal directed coupler of broad band three decibel and coupled end broadband output signal output amplitude to equate, the phase of output signal difference is the circuit transmission characteristic of 90 degree, its straight-through end and coupled end are connect the output of two branch roads of Broadband Matching type single-pole double-throw switch (SPDT) B respectively, can obtain high performance microwave millmeter wave broad band three decibel orthogonal digital phase shifter.

Broadband Matching type single-pole double-throw switch (SPDT) B can be respectively by field-effect transistor or two kinds of control devices of PIN diode, or other control device constitutes Broadband Matching type single-pole double-throw switch (SPDT) circuit.Adopting field-effect transistor is that the Broadband Matching type single-pole double-throw switch (SPDT) circuit of control device is by 12 field-effect transistors (T1, T2, T3, T4, T5, T6, T11, T12, T13, T14, T15 and T16), 15 sections microstrip lines (W1, W2, W3, W4, W5, W6, W7, W8, W12, W13, W14, W15, W16, W17 and W18) and, 12 resistance (R1, R2, R3, R4, R5, R6, R11, R12, R13, R14, R15 and R16) and earth terminal constitute.It has a public road and two symmetrical fully branch roads to constitute, during work, control end K1 adds the pinch-off voltage (negative polarity) of field-effect transistor, or control voltage amplitude absolute value is a little more than pinch-off voltage and be lower than puncture voltage, control end K2 adds zero volt voltage of field-effect transistor or less than 0.5 volt positive polarity voltage, at this moment, field-effect transistor T2, T3, T4, T5, T11 and T16 are in high impedance status, field-effect transistor T1, T6, T12, T13, T14 and T15 are in low impedance state, at this moment, the input signal of port P1 is exported through W2 to W8, this branch road is a conducting state, and the branch road of W12 to W18 is an isolation, resistance R 17 is as the matched load to external circuit, when the control signal of control end K1 and K2 is exchanged, field-effect transistor T2, T3, T4, T5, T11 and T16 are in low impedance state, field-effect transistor T1, T6, T12, T13, T14 and T15 are in high impedance status, the branch road of W2 to W8 is in isolation, resistance R 7 is as the matched load to external circuit, and the branch road of W12 to W18 is a conducting state.

Adopting PIN diode is the Broadband Matching type single-pole double-throw switch (SPDT) circuit (Fig. 3) of control device, by 8 PIN diode (D1, D2, D3, D4, D11, D12, D13 and D14), 12 sections microstrip lines (T1, T2, T3, T4, T5, T6, T7, T13, T14, T15, T16 and T17), 12 electric capacity (C1, C2, C3, C4, C5, C6, C7, C13, C14, C15, C16 and C17), 7 inductance (L1, L2, L3, L4, L5, L6 and L7), 5 resistance (R1, R2, R3, R4 and R5) and earth terminal constitute.It has a public road and two symmetrical fully branch roads to constitute, during work, control end K1 adds negative polarity control voltage, when control end K2 adds positive polarity control voltage, PIN diode D1, D3, D12 and D14 are in low impedance state, PIN diode D11, D13, D2 and D4 are in high impedance status, at this moment, the input signal of port P1 is exported through T3 to T7, and this branch road is a conducting state, and the branch road of T13 to T17 is an isolation, resistance R 3 is as the matched load to external circuit, when the control signal of control end K1 and K2 is exchanged, PIN diode D1, D3, D12 and D14 are in high impedance status, PIN diode D11, D13, D2 and D4 are in low impedance state, at this moment, T3 to T7 branch road is an isolation, and resistance R 2 is as the matched load to external circuit, and the branch road of T13 to T17 is a conducting state.When the polarity revert all that is connected of PIN diode D1, D2, D3, D4, D11, D12, D13 and D14 among Fig. 3 connected, then the conducting of its two branch road and isolation were exchanged.

Because two branch roads of Broadband Matching type single-pole double-throw switch (SPDT) are symmetry fully, so the amplitude of this two-way is also identical with phase change.The output of this two-way connects the straight-through end and the coupled end of the orthogonal directed coupler of broad band three decibel (A) respectively.

50 ohm of matched load C of wide-bandwidth standards are made of resistance or microwave absorbing material.It is connected the isolation end of the orthogonal directed coupler A of broad band three decibel, its effect is when the orthogonal directed coupler A of broad band three decibel works, signal energy at its isolation end all can be absorbed by 50 ohm of matched loads of wide-bandwidth standards, and be not reflected back, in order to avoid influence the amplitude and the phase characteristic of other port.

The microwave millmeter wave broad band three decibel orthogonal digital phase shifter operation principle is described below: the microwave and millimeter wave wideband input signal is from arbitrary port P2 input of the orthogonal directed coupler A of broad band three decibel, isolation termination wide-bandwidth standards 50 ohm matched load Cs corresponding with P2, straight-through port corresponding with P2 and coupling port connect the output of two branch roads of Broadband Matching type single-pole double-throw switch (SPDT) B (see figure 4) respectively, the public road output of Broadband Matching type single-pole double-throw switch (SPDT) B is signal output part P1, when the control end K1 of Broadband Matching type single-pole double-throw switch (SPDT) B and K2 add one group dc control signal, two branch roads of Broadband Matching type single-pole double-throw switch (SPDT) B (branch road 1 and branch road 2) are in conducting and isolation respectively, branch road 1 conducting, branch road 2 is isolated, the signal of the orthogonal directed coupler A of broad band three decibel coupling port passes through the public road output P1 output of the branch road 1 of Broadband Matching type single-pole double-throw switch (SPDT) B from broadband matching type single-pole double-throw switch (SPDT) B, at this moment, the signal of the orthogonal directed coupler A of broad band three decibel straight-through port is isolated at the branch road 2 of Broadband Matching type single-pole double-throw switch (SPDT) B, when the control end K1 of Broadband Matching type single-pole double-throw switch (SPDT) B and K2 add another group dc control signal, two the branch road conductings of Broadband Matching type single-pole double-throw switch (SPDT) B and isolation are exchanged, branch road 2 conductings, branch road 1 is isolated, the signal of the orthogonal directed coupler A of broad band three decibel straight-through port passes through the public road output P1 output of the branch road 2 of Broadband Matching type single-pole double-throw switch (SPDT) B from broadband matching type single-pole double-throw switch (SPDT) B, at this moment, the signal of the orthogonal directed coupler A of broad band three decibel coupling port is isolated at the branch road 1 of Broadband Matching type single-pole double-throw switch (SPDT) B, two states equates in the amplitude of P1 output signal, phase phasic difference 90 degree of output signal, if will be by the orthogonal directed coupler A of broad band three decibel coupling port from the phase place of P1 output signal as the reference phase place, then by the orthogonal directed coupler A of broad band three decibel straight-through port from the phase place of P1 output signal than spending from the phase lag 90 of P1 output signal by the orthogonal directed coupler A of broad band three decibel coupling port.Otherwise then leading 90 degree of phase place, thereby realize quadrature three decibels digital phase shift function.Input signal also can be imported from P1, and P2 output in like manner can realize quadrature three decibels digital phase shift.

Embodiment 2.In conjunction with Fig. 1, Fig. 2, Fig. 4, microwave millmeter wave broad band three decibel orthogonal digital phase shifter of the present utility model, adopt except that Broadband Matching type single-pole double-throw switch (SPDT) element such as PIN diode realize different with embodiment 1, all the other are all identical with embodiment 1, are described in detail as follows with regard to different piece below:

Arbitrary port of the orthogonal directed coupler of broad band three decibel (DC) is a microwave and millimeter wave signal I/O end (P2), connect 50 ohm of matched loads of wide-bandwidth standards (LOAD) with the isolation end of the corresponding DC of P2, connect the end of microstrip line T7 in the Broadband Matching type single-pole double-throw switch (SPDT) that constitutes by PIN diode with the coupled end of the corresponding DC of P2, one end of another termination capacitor C 4 of T7, the end of another termination microstrip line T6 of C4, one end of inductance L 4 and the positive pole of PIN diode D4, the end of the negative pole connecting resistance R2 of D4, the other end ground connection of R2, one end of another termination capacitor C 5 of L4 and control end K1, the other end ground connection of capacitor C 5, one end of another termination capacitor C 3 of T6, the end of another termination microstrip line T5 of C3, the positive pole of another termination PIN diode D3 of T5 and the end of L3, another termination capacitor C 6 of L3 and an end of resistance R 4, the other end ground connection of C6 and R4, the negative pole of D3 connects the end of microstrip line T4, one end of another termination inductance L 2 of T4, the negative pole of the positive pole of PIN diode D2 and PIN diode D1, the minus earth of D2, one end of another termination capacitor C 7 of L2 and control end K1, the other end ground connection of C7, the positive pole of D1 connects the end of microstrip line T3, another termination microstrip line T2 of T3 and the end (common port) of T13, another termination capacitor C 1 of T2 and an end of inductance L 1, another termination capacitor C 2 of L1 and an end of resistance R 1, the other end ground connection of C2 and R1, the end of another termination microstrip line T1 of C1, another termination microwave and millimeter wave signal output/input P1 of T1, connect the end of microstrip line T17 in the Broadband Matching type single-pole double-throw switch (SPDT) that constitutes by PIN diode with the straight-through end of the corresponding DC of P2, one end of another termination capacitor C 14 of T17, the end of another termination microstrip line T16 of C14, one end of inductance L 14 and the positive pole of PIN diode D14, the end of the negative pole connecting resistance R3 of D14, the other end ground connection of R3, one end of another termination capacitor C 15 of L14 and control end K2, the other end ground connection of capacitor C 15, one end of another termination capacitor C 13 of T16, the end of another termination microstrip line T15 of C13, the positive pole of another termination PIN diode D13 of T5 and the end of L13, another termination capacitor C 16 of L13 and an end of resistance R 5, the other end ground connection of C16 and R5, the negative pole of D13 connects the end of microstrip line T14, one end of another termination inductance L 12 of T14, the negative pole of the positive pole of PIN diode D12 and PIN diode D11, the minus earth of D12, one end of another termination capacitor C 17 of L12 and control end K2, the other end ground connection of C17, the positive pole of D11 connects the end of microstrip line T13, another termination microstrip line T2 of T13 and the end (common port) of T3.

Claims

1, a kind of microwave millmeter wave broad band three decibel orthogonal digital phase shifter, it is characterized in that: it is by the broad band three decibel directional coupler, Broadband Matching type single-pole double-throw switch (SPDT) and wide-bandwidth standards matched load are formed, the isolation termination wide-bandwidth standards matched load corresponding with the orthogonal directed coupler signal of broad band three decibel I/O end, the I/O end of a branch road of the straight-through termination Broadband Matching type single-pole double-throw switch (SPDT) corresponding with the orthogonal directed coupler signal of broad band three decibel I/O end, the I/O end of another branch road of the coupling termination Broadband Matching type single-pole double-throw switch (SPDT) corresponding with the orthogonal directed coupler signal of broad band three decibel I/O end, the public road of Broadband Matching type single-pole double-throw switch (SPDT) connects another signal output/input, another branch road of branch road conducting in K1 and two branch roads of K2 control Broadband Matching type single-pole double-throw switch (SPDT) ends, or a branch road is by another branch road conducting.

2, microwave millmeter wave broad band three decibel orthogonal digital phase shifter according to claim 1, it is characterized in that: the circuit of Broadband Matching type single-pole double-throw switch (SPDT) is made up of a public road and two identical branch roads, and this route resistance, electric capacity, inductance, microstrip line, earth terminal and field-effect transistor are formed.Public route microstrip line W1 constitutes, one of them route microstrip line W2 of two identical branch roads, W3, W4, W5, W6, W7, W8, resistance R 1, R2, R3, R4, R5, R6, R7, field-effect transistor T1, T2, T3, T4, T5, T6, control end K1, K2 and earth terminal constitute, another route microstrip line W12, W13, W14, W15, W16, W17, W18, resistance R 11, R12, R13, R14, R15, R16, R17, field-effect transistor T11, T12, T13, T14, T15, T16, control end K1, K2 and earth terminal constitute.

3, microwave millmeter wave broad band three decibel orthogonal digital phase shifter according to claim 1, it is characterized in that: the circuit of Broadband Matching type single-pole double-throw switch (SPDT) is made up of a public road and two identical branch roads, this route resistance, electric capacity, inductance, microstrip line, earth terminal and PIN diode are formed, public route microstrip line T1, T2, capacitor C 1, C2, resistance R 1, inductance L 1 and earth terminal constitute, two one of them route microstrip line T3 of identical branch road, T4, T5, T6, T7, capacitor C 3, C4, C5, C6, C7, inductance L 2, L3, L4, resistance R 2, R4, diode D1, D2, D3, D4, control end K1, K2 and earth terminal constitute, another route microstrip line T13, T14, T15, T16, T17, capacitor C 13, C14, C15, C16, C17, inductance L 12, L13, L14, resistance R 3, R5, diode D11, D12, D13, D14, control end K1, K2 and earth terminal constitute.