CN103107783A

CN103107783A - Radio frequency power amplifier

Info

Publication number: CN103107783A
Application number: CN2012105700881A
Authority: CN
Inventors: 陈华锋; 范麟; 刘永利; 黄戈戈; 胡维; 张晓科
Original assignee: CHONGQING SOUTHWEST INTEGRATED-CIRCUIT DESIGN Co Ltd
Current assignee: CHONGQING SOUTHWEST INTEGRATED-CIRCUIT DESIGN Co Ltd
Priority date: 2012-12-25
Filing date: 2012-12-25
Publication date: 2013-05-15
Anticipated expiration: 2032-12-25
Also published as: CN103107783B

Abstract

The invention discloses a radio frequency power amplifier. The radio frequency power amplifier comprises an input matching circuit, a first wireless fidelity (WIFI) power amplifier circuit, a second WIFI power amplifier circuit and a power synthesis and output matching circuit. The radio frequency power amplifier is characterized in that the input matching circuit matches impedances of the first WIFI power amplifier circuit and the second WIFI power amplifier circuit to 50 ohm; the first WIFI power amplifier circuit and the second WIFI power amplifier circuit respectively process received radio-frequency signals by power amplification and output the radio-frequency signals to the output matching circuit to be processed by power synthesis; the output matching circuit processes the outputs of the first WIFI power amplifier circuit and the second WIFI power amplifier circuit by power synthesis and matches the impedances of the first WIFI power amplifier circuit and the second WIFI power amplifier circuit to 50 ohm. The radio frequency power amplifier has the advantages of being low in cost, high in efficiency, small in size, high in gaining, good in heat dissipation, low in working voltage, high in reliability and good in application prospect.

Description

Radio-frequency power amplifier

Technical field

The present invention relates to power amplification circuit, be specifically related to the radio-frequency power amplifier that utilizes power synthetic technique to realize.

Background technology

development along with science and technology, the mankind are more and more stronger to the dependence of satellite navigation, in this field, more ripe GPS is arranged, the GPRS architecture, the Beidou satellite navigation of GLONASS and China etc., particularly the Beidou satellite navigation of China has the unique advantage of oneself, that is exactly 2 generations of the Big Dipper and the Big Dipper 1 generation satellite navigation system and deposits, can utilize the accurate location in 2 generations of the Big Dipper and the short message communication function in 1 generation of the Big Dipper to develop satellite navigation terminal with Chinese characteristics, in sea fishery, forest fire protection, earthquake relief work, the mapping measurement waits the field of GPRS weakness to have and important effect, in this navigation system with short message communication function, the power amplification that transmits is a very important key technology, also that restriction Beidou satellite navigation terminal is to the key factor of miniaturization development, increasingly mature along with present Beidou satellite system, the development of the hand-held multimode terminal of the Big Dipper is trend from now on, this has just required a kind of high-performance, low-cost, the power amplifier module of small size.

For many years, the Big Dipper 1 substitutes large power triode that family terminal power amplifier section mainly relies on the producers such as import " Fujitsu ", " Mitsubishi " and adds that complicated match circuit realizes; Efficient is low, and the power efficiency of emission only has 30% left and right, and the energy has been produced larger waste, in handheld device, because efficient is low, makes the flying power of equipment poor; Operating voltage is high, and operating voltage is 11V or 28V, for handheld device, makes the volume of battery very large, has restricted the trend of handheld device to the ting model development; Gain low, power gain only has the 10dB left and right, need to increase the multistage amplifier that pushes away in advance at front end when global design, makes the increase of complete machine cost, volume become large; Volume is large, because the volume of pliotron own is large, adds that peripheral circuit is complicated, makes the power amplifier partial volume very large, has also restricted the trend of handheld device to the ting model development.

Summary of the invention

Technical problem to be solved by this invention is to provide radio-frequency power amplifier.

In order to solve the problems of the technologies described above, technical scheme of the present invention is, be used for radio-frequency power amplifier, be made of the synthetic output matching circuit that reaches of input matching circuit, WIFI power amplification circuit one, WIFI power amplification circuit two and power, it is characterized in that: described input matching circuit matches 50 ohm with the input impedance of WIFI power amplification circuit one and WIFI power amplification circuit two; Described input matching circuit is made of electric capacity 13 and radio frequency microstrip line one, two, three; Electric capacity 13 is connected between signal input part and ground; Radio-frequency input signals is input to WIFI power amplification circuit one by radio frequency microstrip line one, two, and radio-frequency input signals also is input to WIFI power amplification circuit two by radio frequency microstrip line one, three; WIFI power amplification circuit one and WIFI power amplification circuit two carry out power amplification with the radiofrequency signal of receiving respectively, and outputing to simultaneously described output matching circuit, to carry out power synthetic; Described output matching circuit carries out power with the output of WIFI power amplification circuit one and WIFI power amplification circuit two and synthesizes, and the output impedance of WIFI power amplification circuit one and WIFI power amplification circuit two is matched 50 ohm; Described output matching circuit is made of radio frequency microstrip line four～seven, electric capacity nine～12; The output signal of described WIFI power amplification circuit one is by radio frequency microstrip line four, five and electric capacity 11 output; The output signal of described WIFI power amplification circuit two is by radio frequency microstrip line six, seven and electric capacity 12 output; Electric capacity nine is connected between the connected node and ground of radio frequency microstrip line four and radio frequency microstrip line five; Electric capacity ten is connected between the connected node and ground of radio frequency microstrip line six and radio frequency microstrip line seven.

In radio frequency circuit system, system impedance is 50 ohm, and for power amplification circuit in order to guarantee maximum power output, the input and output impedance all is optimized to the maximum power place and impedance is relatively poor, bring into play optimum performance in order to make module in 50 ohm of systems, need to carry out impedance matching, in the technical program, the function of input matching circuit is exactly that input impedance with two WIFI power amplification circuits matches 50 ohm; And the function of output matching and power synthesis circuit is that power is carried out in the output of WIFI power amplification circuit is synthetic and the output impedance of power amplification circuit is matched 50 ohm of systems, prevents the signal reflection phenomenon that causes due to impedance mismatch.Input matching circuit of the present invention and power are synthetic and output matching circuit is simple in structure, and efficient is high, and gain is large, need to not push away in advance amplifier in the front end increase, and cost is low, and volume is little.

Because the present invention adopts two WIFI power amplification circuits, being embodied as times power by the power synthesis mode amplifies, for each power amplification circuit, the power of sharing only has half of power output, compare with the power amplifier chips of SIP form, heat radiation disperses, and has greatly improved whole burn-out resistance, has improved reliability.

According to a kind of preferred version of radio-frequency power amplifier of the present invention, described WIFI power amplification circuit one and WIFI power amplification circuit two include the WIFI power amplification circuit.

According to a kind of preferred version of radio-frequency power amplifier of the present invention, described WIFI power amplification circuit is YP2233W or YP2027W or YP3035W.

The beneficial effect of radio-frequency power amplifier of the present invention is: the present invention adopts general WIFI power amplifier, utilizes power synthetic technique and match circuit, satisfies the requirement of Big Dipper hand-held set power amplification, and will greatly increase the flying power of handheld device; Have that cost is low, efficient is high, volume is little, gain is high, good heat dissipation, operating voltage is low and reliability is high characteristics, have a good application prospect.

Description of drawings

Fig. 1 is the theory diagram of radio-frequency power amplifier of the present invention.

Fig. 2 is the schematic diagram of radio-frequency power amplifier of the present invention.

Embodiment

Referring to Fig. 1 and Fig. 2, radio-frequency power amplifier is made of the synthetic output matching circuit M3 that reaches of input matching circuit M1, WIFI power amplification circuit one M2, WIFI power amplification circuit two M4 and power, and it is characterized in that: described input matching circuit M1 matches 50 ohm with the input impedance of WIFI power amplification circuit one M2 and WIFI power amplification circuit two M4; Described input matching circuit M1 is made of capacitor C 13 and radio frequency microstrip line X1, X2, X3; Capacitor C 13 is connected between signal input part and ground; Radio-frequency input signals is input to WIFI power amplification circuit one M2 by radio frequency microstrip line X1, X2, and radio-frequency input signals also is input to WIFI power amplification circuit two M4 by radio frequency microstrip line X1, X3; WIFI power amplification circuit one M2 and WIFI power amplification circuit two M4 carry out power amplification with the radiofrequency signal of receiving respectively, and outputing to simultaneously described output matching circuit M3, to carry out power synthetic; Described output matching circuit M3 carries out power with the output of WIFI power amplification circuit one M2 and WIFI power amplification circuit two M4 and synthesizes, and the output impedance of WIFI power amplification circuit one M2 and WIFI power amplification circuit two M4 is matched 50 ohm; Described output matching circuit M3 is made of radio frequency microstrip line X4～X7, capacitor C 9～C12; The output signal of described WIFI power amplification circuit one M2 is by radio frequency microstrip line X4, X5 and capacitor C 11 outputs; The output signal of described WIFI power amplification circuit two M4 is by radio frequency microstrip line X6, X7 and capacitor C 12 outputs; Capacitor C 9 is connected between the connected node and ground of radio frequency microstrip line X4 and radio frequency microstrip line X5; Capacitor C 10 is connected between the connected node and ground of radio frequency microstrip line X6 and radio frequency microstrip line X7.

In specific embodiment, described WIFI power amplification circuit one M2 and WIFI power amplification circuit two M4 include the WIFI power amplification circuit, it is consistent that WIFI power amplification circuit one M2 and WIFI power amplification circuit two M4 phase of output signal and amplitude must guarantee, can be by adjusting radio frequency microstrip line X4 and radio frequency microstrip line X6 and capacitor C 9, C10 realization; Described WIFI power amplification circuit can adopt YP2233W or YP2027W or YP3035W etc.

Adopt YP2233W that the present invention is tested with the WIFI power amplification circuit, performance index such as the table 1 of product.

Table 1: product performance index test result

As can be seen from Table 1: efficient of the present invention is high, and efficient will increase the flying power of handheld device greatly up to 45%; Gain high, gain is up to 26dB; Operating voltage is low, and this module adopts the 5V Power supply; The present invention satisfies the requirement of Beidou satellite navigation multimode hand-held terminal device fully.

The above is described the specific embodiment of the present invention, still, and the scope that is not limited only to embodiment of the present invention's protection.

Claims

1. radio-frequency power amplifier, synthetic and output matching circuit (M3) formation by input matching circuit (M1), WIFI power amplification circuit one (M2), WIFI power amplification circuit two (M4) and power, it is characterized in that: described input matching circuit (M1) matches 50 ohm with the input impedance of WIFI power amplification circuit one (M2) and WIFI power amplification circuit two (M4); Described input matching circuit (M1) is made of electric capacity 13 and radio frequency microstrip line one, two, three; Electric capacity 13 is connected between signal input part and ground; Radio-frequency input signals is input to WIFI power amplification circuit one (M2) by radio frequency microstrip line one, two, and radio-frequency input signals also is input to WIFI power amplification circuit two (M4) by radio frequency microstrip line one, three; WIFI power amplification circuit one (M2) and WIFI power amplification circuit two (M4) carry out power amplification with the radiofrequency signal of receiving respectively, and outputing to simultaneously described output matching circuit (M3), to carry out power synthetic; Described output matching circuit (M3) carries out power with the output of WIFI power amplification circuit one (M2) and WIFI power amplification circuit two (M4) and synthesizes, and the output impedance of WIFI power amplification circuit one (M2) and WIFI power amplification circuit two (M4) is matched 50 ohm; Described output matching circuit (M3) is made of radio frequency microstrip line four～radio frequency microstrip line seven, electric capacity nine～electric capacity 12; The output signal of described WIFI power amplification circuit one (M2) is by radio frequency microstrip line four, five and electric capacity 11 output; The output signal of described WIFI power amplification circuit two (M4) is by radio frequency microstrip line six, seven and electric capacity 12 output; Electric capacity nine is connected between the connected node and ground of radio frequency microstrip line four and radio frequency microstrip line five; Electric capacity ten is connected between the connected node and ground of radio frequency microstrip line six and radio frequency microstrip line seven.

2. radio-frequency power amplifier according to claim 1, it is characterized in that: described WIFI power amplification circuit one (M2) and WIFI power amplification circuit two (M4) include the WIFI power amplification circuit.

3. radio-frequency power amplifier according to claim 2, it is characterized in that: described WIFI power amplification circuit is YP2233W or YP2027W or YP3035W.