CN202339972U

CN202339972U - Power synthesis circuit

Info

Publication number: CN202339972U
Application number: CN2011204713616U
Authority: CN
Inventors: 洪立正
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-18
Filing date: 2011-11-18
Publication date: 2012-07-18
Anticipated expiration: 2021-11-18

Abstract

The utility model relates to a Power synthesis circuit which comprises a rectangular waveguide H-face T-shaped adapter, an isolator and combined sources, wherein the isolator is connected to the port (1) or (2) of the H-face T-shaped adapter, the input port of the isolator and the port (1) or (2) of the H-face T-shaped adapter are connected with the combined sources respectively, and the combined power is outputted through the port (3) of the H-face T-shaped adapter. More than two of the power combiner circuits are combined to form a multi-power combiner circuit. The power combiner circuit is applied to power combination with high combination efficiency, convenience for modulation and easily-controlled combination frequency. The power combiner circuit is suitable for power combination of microwaves and millimeter waves and can also be used as an injection locking amplifier.

Description

A kind of power synthesis circuit

Technical field

The present invention relates to the power synthetic technique in microwave, the millimeter wave field.

Background technology

The microwave power synthetic technology is the small road of a kind of usefulness synthesizes the power of two or more microwave oscillators, and with the power of realizing that its output is bigger, the device of producing is called power combiner.Since the seventies, people have carried out extensive studies to power synthetic technique, the synthetic circuit of multiple power occurred, and these circuit are divided into resonance type power combiner circuit and disresonance type power synthesis circuit again.

The resonance type power combiner circuit is the negative resistance device of in single resonant cavity, putting into more than two or more, makes them produce resonance and reaches that device power is synthetic.But not the resonance type power combiner circuit is to select for use suitable microwave network that the power of two or more microwave oscillators or power combiner is synthesized.Like circulator power combiner used in disresonance type power synthesis circuit type, be to synthesize with the power of microwave circulator circuit with two microwave oscillators.Fig. 1 is the conspectus of this synthesizer, by visible two oscillators that are synthesized of figure, is connected on the port one and port 2 places of circulator respectively, and synthetic power is from port 3 outputs.If a plurality of such circulator power combiners are combined; And with the power output of previous stage circulator power combiner circuit as the synthetic input of back one-level circulator power; Then constitute the multistage power synthesis circuit of circulator, schematic circuit is shown in 2.This power synthesis circuit has that synthetic mode is simple, debugging is convenient, operating frequency synthesizer is easy to the advantage of controlling, realize easily that multistage power is synthetic; Yet because of the insertion loss of circulator bigger; Cause the power combined coefficient on the low side, multistage synthetic progression is also less.

And for example in disresonance type power synthesis circuit type, a kind of rectangular waveguide H face T type tieing power combiner (microwave journal NO.2 in 1993) of appearance, it is with single H face T type tieing, and the power of two microwave oscillators is synthesized, and is as shown in Figure 3.Fig. 3 a illustrates the sketch map of brachmorphy waveguide H face T type tieing.A is the broadside of brachmorphy waveguide H face T type tieing waveguide among the figure, and Fig. 3 b illustrates the conspectus of this synthesizer, and the oscillator that is synthesized is connected on the port one and the port 3 of brachmorphy waveguide H face T type tieing, and synthetic power is from port 2 outputs.This power combiner has the advantage that volume is little, combined coefficient is high, but because two oscillators directly are coupled, makes its synthetic debug difficulties, the difficult control of frequency synthesis, and multistage synthetic also being difficult to realizes.

Summary of the invention

The objective of the invention is in order to design a kind of combined coefficient height, synthesis mode is simple, and the power synthesis circuit that is easy to control, debug realizes that multistage power is synthetic.

Scheme of the present invention is to form a kind of power synthesis circuit with a rectangular waveguide H face T type tieing and isolator; Utilize this power synthesis circuit with two or more sources that are synthesized; It is synthetic to carry out power, and realizes that as element circuit multistage power is synthetic with this.Power combiner element circuit of the present invention is: port one or 2 places at a rectangular waveguide H face T type knot are connected to isolator 4; Be connected to isolator 4 at pay attention to for a short time port 2 places of H face T type tieing of the input of isolator 4 and rectangle, be connected to the source of being synthesized (source of being synthesized can be that oscillation source, power combiner assembly, first order isolator input port also can be any type of microwave, millimeter-wave signal) at the port 2 of the input of isolator 4 and rectangular waveguide H face T type tieing or 1 place respectively.Power after synthetic is by port 3 outputs of H face T type tieing.Form the power combiner element circuit; Also can it be regarded as single-stage power combiner or the synthetic association of power; The watt level of this power synthesis circuit depends primarily on the watt level in the source of being synthesized, and the power power output that is synthesized the source is big, and then the power of power synthesis circuit is also big; Its combined coefficient is more than 85%, even can reach 100% (seeing Fig. 4, Fig. 5 sketch map).Form the multistage power synthesis circuit by plural power combiner element circuit; The structure of this circuit is the synthetic power with previous stage output, is synthesized the source, the input port of the port one of the rectangular waveguide H face T type knot of input back one-level or the isolator 4 at 2 places as of back one-level; The port 2 or 1 of the rectangular waveguide H face T connector of this grade connect another be synthesized the source～; Power after port 3 outputs are synthetic, the one-level one-level is synthetic like this, constitutes multistage power combiner.Along with increasing of progression; Whenever increase the just minimizing gradually of effective contribution of one-level to power output; Principle is to bring the power of loss suitable at the power that increases and isolator and T connector, and it is just meaningless then to increase progression again, generally is that level Four is exceeded from cost consideration in fact.Circuit diagram is seen Fig. 6, Fig. 7.

Adopt the power combiner of circuit production of the present invention; Owing to used isolator, oscillator that is synthesized or power combiner unit isolate each other, thereby have brought debugging convenient; Because frequency synthesis equals the frequency of first order isolator input end signal, so frequency synthesis is easy to control.Compare with the circulator power combiner, because of the loss ratio circulator of isolator is little, with the power combiner unit of circuit formation of the present invention.The combined coefficient of synthetic power ratio circulator power combiner is high, and except the loss of isolator, the synthetic efficient of power can reach 100%, and the synthetic progression of the multistage power progression more synthetic than circulator power is many, and gross output is bigger.And processing and make also simple, the combination size is little, compact conformation, thus reduced cost because microwave, millimeter-wave signal that the isolator input of the first order can the most any modulation forms, this power synthesis circuit can be used as Injection-Locked Amplifier again and uses.

Description of drawings

Fig. 1 is a circulator power combiner element circuit

Fig. 2 is the multistage power combiner circuit of circulator

Fig. 3 a is the sketch map of rectangular waveguide H face T type tieing

Fig. 3 b is the power combiner conspectus of rectangular waveguide H face T type tieing

Fig. 4, Fig. 5 are two kinds of structure line sketch mapes of power combiner element circuit of the present invention

Fig. 6, Fig. 7 are the conspectuses of two kinds of structures of multistage power combiner circuit of the present invention

Fig. 8 is three grades of power combiner structural representations of 8mm frequency range.

Fig. 9 is the A-A cross-sectional schematic of Fig. 8

Among the figure: the 1-frequency trim; The 2-DC feedback; The 3-oscillator; The 4-isolator; 5-H face T type tieing.

Embodiment

Further specify the present invention below in conjunction with Fig. 4-Fig. 9 through embodiment.

According to frequency requirement, select corresponding H face T type tieing, existing is example to make three grades of power combiners of a 8mm frequency.Make power combiner element circuit (see figure 8) earlier; Thread mill drilling on oscillator 3; DC feedback 2 is fixed in this place, and the port 2 of rectangular waveguide H face T type tieing connects with the oscillator that frequency trim 1 is housed 3 through isolator 4, and port one connects with the oscillator 3 that another is equipped with frequency trim 1; The synthetic power of port 3 outputs, this circuit is as first order power combiner.The port 2 of partial rectangular waveguide H face T type tieing connects the port 3 of first order rectangular waveguide H face T type tieing through isolator 4, and the port one of this grade connects another vibration that frequency trim 1 is housed 3, the partial synthetic power of port 3 outputs.Connect third level power combiner element circuit with the same manner, promptly constitute three grades of formula power power combiners.During debugging, every increase one-level is synthetic, and it is synthetic that the frequency that only needs the fine setting afterbody to be synthesized oscillator just reaches power, just regulates short position of piston (frequency trim 1), i.e. the frequency (see figure 9) of fine-tuning oscillator.

Claims

1. power synthesis circuit; Be by rectangular waveguide H face T type tieing be synthesized the source and constitute; It is characterized in that locating to be connected to isolator (4) in port (1) or (2) of a rectangular waveguide H face T type tieing, locate to be connected to respectively the source of being synthesized at the input of isolator (4) and port (2) or (1) of rectangular waveguide H face T type tieing, the power after synthesizing is by port (3) output of H face T type knot; Form the power combiner element circuit; Also can it be regarded as single-stage power combiner or the synthetic assembly of power, synthetic our watt level of electricity of this power depends primarily on the watt level in the source of being synthesized, and the power power output that is synthesized the source is big; Then the power of power synthesis circuit is also big, and its combined coefficient is more than 85%; Form the multistage power synthesis circuit by plural power combiner element circuit; The architectural feature of its circuit is that the synthetic power of previous stage output is synthesized the source as of back one-level; The port (1) of the rectangular waveguide H face T type knot of input back one-level or the input port of the isolator (4) that (2) are located; The port (2) of the rectangular waveguide H face T connector of this grade or (1) connect the power after another synthetic source port (3) output is synthesized; The one-level one-level is synthetic like this, constitutes multistage power combiner, and the progression of multistage power synthesis circuit is no more than level Four.

2. power synthesis circuit according to claim 1, it is characterized in that being synthesized the source is oscillator or power combiner assembly.